diff --git a/libc/sysdeps/linux/alpha/bits/ipc.h 
b/libc/sysdeps/linux/alpha/bits/ipc.h
index e2e20d149..28b21544d 100644
--- a/libc/sysdeps/linux/alpha/bits/ipc.h
+++ b/libc/sysdeps/linux/alpha/bits/ipc.h
@@ -49,6 +49,6 @@ struct ipc_perm
      unsigned int mode;            /* Read/write permission.  */
      unsigned short int __seq;        /* Sequence number.  */
      unsigned short int __pad1;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/alpha/bits/msq.h 
b/libc/sysdeps/linux/alpha/bits/msq.h
index ea0dba0cc..3020f6ff5 100644
--- a/libc/sysdeps/linux/alpha/bits/msq.h
+++ b/libc/sysdeps/linux/alpha/bits/msq.h
@@ -45,8 +45,8 @@ struct msqid_ds
    msglen_t msg_qbytes;        /* max number of bytes allowed on queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/alpha/bits/sem.h 
b/libc/sysdeps/linux/alpha/bits/sem.h
index 0bd103620..2092009e7 100644
--- a/libc/sysdeps/linux/alpha/bits/sem.h
+++ b/libc/sysdeps/linux/alpha/bits/sem.h
@@ -41,8 +41,8 @@ struct semid_ds
    __time_t sem_otime;            /* last semop() time */
    __time_t sem_ctime;            /* last time changed by semctl() */
    unsigned long int sem_nsems;        /* number of semaphores in set */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/alpha/bits/shm.h 
b/libc/sysdeps/linux/alpha/bits/shm.h
index e62b05afb..4b6ae8d46 100644
--- a/libc/sysdeps/linux/alpha/bits/shm.h
+++ b/libc/sysdeps/linux/alpha/bits/shm.h
@@ -56,8 +56,8 @@ struct shmid_ds
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };

  #ifdef __USE_MISC
@@ -79,10 +79,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/alpha/bits/stat.h 
b/libc/sysdeps/linux/alpha/bits/stat.h
index cbcdf2145..88bc6617d 100644
--- a/libc/sysdeps/linux/alpha/bits/stat.h
+++ b/libc/sysdeps/linux/alpha/bits/stat.h
@@ -89,7 +89,7 @@ struct stat
      __ST_TIME(a);        /* Time of last access.  */
      __ST_TIME(m);        /* Time of last modification.  */
      __ST_TIME(c);        /* Time of last status change.  */
-    long __unused[3];
+    long __uclibc_unused[3];
    };

  #ifdef __USE_LARGEFILE64
@@ -110,7 +110,7 @@ struct stat64
      __ST_TIME(a);        /* Time of last access.  */
      __ST_TIME(m);        /* Time of last modification.  */
      __ST_TIME(c);        /* Time of last status change.  */
-    long __unused[3];
+    long __uclibc_unused[3];
    };
  #endif

diff --git a/libc/sysdeps/linux/arm/bits/kernel_stat.h 
b/libc/sysdeps/linux/arm/bits/kernel_stat.h
index 7bd89f9ab..b293dfc05 100644
--- a/libc/sysdeps/linux/arm/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/arm/bits/kernel_stat.h
@@ -29,8 +29,8 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  struct kernel_stat64 {
diff --git a/libc/sysdeps/linux/arm/bits/shm.h 
b/libc/sysdeps/linux/arm/bits/shm.h
index 2708c58ff..86245faff 100644
--- a/libc/sysdeps/linux/arm/bits/shm.h
+++ b/libc/sysdeps/linux/arm/bits/shm.h
@@ -50,16 +50,16 @@ struct shmid_ds
      struct ipc_perm shm_perm;        /* operation permission struct */
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -81,10 +81,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/bfin/bits/kernel_stat.h 
b/libc/sysdeps/linux/bfin/bits/kernel_stat.h
index 7700d6109..2c2e818d6 100644
--- a/libc/sysdeps/linux/bfin/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/bfin/bits/kernel_stat.h
@@ -21,8 +21,8 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  struct kernel_stat64 {
diff --git a/libc/sysdeps/linux/c6x/bits/ipc.h 
b/libc/sysdeps/linux/c6x/bits/ipc.h
index 4e9236eb6..c28a2ee3b 100644
--- a/libc/sysdeps/linux/c6x/bits/ipc.h
+++ b/libc/sysdeps/linux/c6x/bits/ipc.h
@@ -49,6 +49,6 @@ struct ipc_perm
      __mode_t mode;                      /* Read/write permission. */
      unsigned short int __seq;        /* Sequence number.  */
      unsigned short int __pad2;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/common-generic/bits/stat.h 
b/libc/sysdeps/linux/common-generic/bits/stat.h
index 4ade63f6f..2f72d357a 100644
--- a/libc/sysdeps/linux/common-generic/bits/stat.h
+++ b/libc/sysdeps/linux/common-generic/bits/stat.h
@@ -68,8 +68,8 @@ struct stat
      int st_ctime;                /* Time of last status change. */
      unsigned int st_ctime_nsec;
  #endif
-    unsigned int __unused4;
-    unsigned int __unused5;
+    unsigned int __uclibc_unused4;
+    unsigned int __uclibc_unused5;
    } __ARCH_64BIT_ALIGNMENT__;


@@ -106,8 +106,8 @@ struct stat64
      int st_ctime;                /* Time of last status change. */
      unsigned int st_ctime_nsec;
  # endif
-    unsigned int __unused4;
-    unsigned int __unused5;
+    unsigned int __uclibc_unused4;
+    unsigned int __uclibc_unused5;
  };
  #endif

diff --git a/libc/sysdeps/linux/common/bits/ipc.h 
b/libc/sysdeps/linux/common/bits/ipc.h
index ca7f58cc7..cf7da2a29 100644
--- a/libc/sysdeps/linux/common/bits/ipc.h
+++ b/libc/sysdeps/linux/common/bits/ipc.h
@@ -55,6 +55,6 @@ struct ipc_perm
  #endif
      unsigned short int __seq;        /* Sequence number.  */
      unsigned short int __pad2;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/common/bits/msq.h 
b/libc/sysdeps/linux/common/bits/msq.h
index a1c3ea43d..b594cfff2 100644
--- a/libc/sysdeps/linux/common/bits/msq.h
+++ b/libc/sysdeps/linux/common/bits/msq.h
@@ -38,18 +38,18 @@ struct msqid_ds
  {
    struct ipc_perm msg_perm;    /* structure describing operation 
permission */
    __time_t msg_stime;        /* time of last msgsnd command */
-  unsigned long int __unused1;
+  unsigned long int __uclibc_unused1;
    __time_t msg_rtime;        /* time of last msgrcv command */
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused2;
    __time_t msg_ctime;        /* time of last change */
-  unsigned long int __unused3;
+  unsigned long int __uclibc_unused3;
    unsigned long int __msg_cbytes; /* current number of bytes on queue */
    msgqnum_t msg_qnum;        /* number of messages currently on queue */
    msglen_t msg_qbytes;        /* max number of bytes allowed on queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused4;
-  unsigned long int __unused5;
+  unsigned long int __uclibc_unused4;
+  unsigned long int __uclibc_unused5;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/common/bits/sem.h 
b/libc/sysdeps/linux/common/bits/sem.h
index 3fb10d42f..910c4b714 100644
--- a/libc/sysdeps/linux/common/bits/sem.h
+++ b/libc/sysdeps/linux/common/bits/sem.h
@@ -41,15 +41,15 @@ struct semid_ds
    struct ipc_perm sem_perm;        /* operation permission struct */
    __time_t sem_otime;            /* last semop() time */
  #if __WORDSIZE == 32
-  unsigned long int __unused1;
+  unsigned long int __uclibc_unused1;
  #endif
    __time_t sem_ctime;            /* last time changed by semctl() */
  #if __WORDSIZE == 32
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused2;
  #endif
    unsigned long int sem_nsems;        /* number of semaphores in set */
-  unsigned long int __unused3;
-  unsigned long int __unused4;
+  unsigned long int __uclibc_unused3;
+  unsigned long int __uclibc_unused4;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/common/bits/shm.h 
b/libc/sysdeps/linux/common/bits/shm.h
index 88bf7a8aa..8906e262b 100644
--- a/libc/sysdeps/linux/common/bits/shm.h
+++ b/libc/sysdeps/linux/common/bits/shm.h
@@ -50,16 +50,16 @@ struct shmid_ds
      struct ipc_perm shm_perm;        /* operation permission struct */
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -81,10 +81,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/common/bits/stat.h 
b/libc/sysdeps/linux/common/bits/stat.h
index 19e2f4e13..07c09f50a 100644
--- a/libc/sysdeps/linux/common/bits/stat.h
+++ b/libc/sysdeps/linux/common/bits/stat.h
@@ -83,8 +83,8 @@ struct stat
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
  #ifndef __USE_FILE_OFFSET64
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
  #else
      __ino64_t st_ino;            /* File serial number.    */
  #endif
diff --git a/libc/sysdeps/linux/common/bits/utmp.h 
b/libc/sysdeps/linux/common/bits/utmp.h
index 6ece31e34..9671d9382 100644
--- a/libc/sysdeps/linux/common/bits/utmp.h
+++ b/libc/sysdeps/linux/common/bits/utmp.h
@@ -82,7 +82,7 @@ struct utmp
  #endif

    int32_t ut_addr_v6[4];    /* Internet address of remote host.  */
-  char __unused[20];        /* Reserved for future use.  */
+  char __uclibc_unused[20];    /* Reserved for future use.  */
  };

  /* Backwards compatibility hacks.  */
diff --git a/libc/sysdeps/linux/common/bits/utmpx.h 
b/libc/sysdeps/linux/common/bits/utmpx.h
index 815fc90b8..3315ef5e6 100644
--- a/libc/sysdeps/linux/common/bits/utmpx.h
+++ b/libc/sysdeps/linux/common/bits/utmpx.h
@@ -78,7 +78,7 @@ struct utmpx
    struct timeval ut_tv;        /* Time entry was made.  */
  #endif
    __int32_t ut_addr_v6[4];    /* Internet address of remote host. */
-  char __unused[20];        /* Reserved for future use.  */
+  char __uclibc_unused[20];    /* Reserved for future use.  */
  };


diff --git a/libc/sysdeps/linux/common/sysctl.c 
b/libc/sysdeps/linux/common/sysctl.c
index 75f9236d0..d3e28f919 100644
--- a/libc/sysdeps/linux/common/sysctl.c
+++ b/libc/sysdeps/linux/common/sysctl.c
@@ -17,7 +17,7 @@ struct __sysctl_args {
      size_t *oldlenp;
      void *newval;
      size_t newlen;
-    unsigned long __unused[4];
+    unsigned long __uclibc_unused[4];
  };
  extern int sysctl (int *__name, int __nlen, void *__oldval,
                     size_t *__oldlenp, void *__newval, size_t __newlen) 
__THROW;
diff --git a/libc/sysdeps/linux/cris/bits/kernel_stat.h 
b/libc/sysdeps/linux/cris/bits/kernel_stat.h
index 619f35e9e..9038a5ab5 100644
--- a/libc/sysdeps/linux/cris/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/cris/bits/kernel_stat.h
@@ -19,8 +19,8 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  /* This matches struct kernel_stat64 in glibc2.1, hence the absolutely
diff --git a/libc/sysdeps/linux/csky/bits/kernel_stat.h 
b/libc/sysdeps/linux/csky/bits/kernel_stat.h
index dae77fd02..617632f48 100644
--- a/libc/sysdeps/linux/csky/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/csky/bits/kernel_stat.h
@@ -34,8 +34,8 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  struct kernel_stat64 {
diff --git a/libc/sysdeps/linux/csky/bits/shm.h 
b/libc/sysdeps/linux/csky/bits/shm.h
index dced1321e..d464318ec 100644
--- a/libc/sysdeps/linux/csky/bits/shm.h
+++ b/libc/sysdeps/linux/csky/bits/shm.h
@@ -40,16 +40,16 @@ struct shmid_ds
      struct ipc_perm shm_perm;        /* operation permission struct */
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -71,10 +71,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/frv/bits/kernel_stat.h 
b/libc/sysdeps/linux/frv/bits/kernel_stat.h
index 1cf521044..cda016ce4 100644
--- a/libc/sysdeps/linux/frv/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/frv/bits/kernel_stat.h
@@ -38,7 +38,7 @@ struct kernel_stat {
      struct timespec st_mtim;
      struct timespec st_ctim;

-    unsigned long long __unused4;
+    unsigned long long __uclibc_unused4;
  };

  struct kernel_stat64 {
@@ -68,7 +68,7 @@ struct kernel_stat64 {
      struct timespec st_mtim;
      struct timespec st_ctim;

-    unsigned long long __unused4;
+    unsigned long long __uclibc_unused4;
  };

  #endif    /*  _BITS_STAT_STRUCT_H */
diff --git a/libc/sysdeps/linux/frv/bits/stat.h 
b/libc/sysdeps/linux/frv/bits/stat.h
index e6a1944bb..381d207f2 100644
--- a/libc/sysdeps/linux/frv/bits/stat.h
+++ b/libc/sysdeps/linux/frv/bits/stat.h
@@ -84,16 +84,16 @@ struct stat
  # define st_mtime st_mtim.tv_sec
  # define st_ctime st_ctim.tv_sec
  #else
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t st_atime;            /* Time of last access.  */

-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t st_mtime;            /* Time of last modification.  */

-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __time_t st_ctime;            /* Time of last status change. */
  #endif
-    unsigned long long __unused4;
+    unsigned long long __uclibc_unused4;
  };

  #ifdef __USE_LARGEFILE64
@@ -131,16 +131,16 @@ struct stat64
  # define st_mtime st_mtim.tv_sec
  # define st_ctime st_ctim.tv_sec
  #else
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t st_atime;            /* Time of last access.  */

-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t st_mtime;            /* Time of last modification.  */

-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __time_t st_ctime;            /* Time of last status change. */
  #endif
-    unsigned long long __unused4;
+    unsigned long long __uclibc_unused4;
  };
  #endif

diff --git a/libc/sysdeps/linux/hppa/bits/ipc.h 
b/libc/sysdeps/linux/hppa/bits/ipc.h
index e634a74b3..fc71db409 100644
--- a/libc/sysdeps/linux/hppa/bits/ipc.h
+++ b/libc/sysdeps/linux/hppa/bits/ipc.h
@@ -57,6 +57,6 @@ struct ipc_perm
  #endif
      unsigned short int __seq;        /* Sequence number.  */
      unsigned int __pad3;
-    unsigned long long int __unused1;
-    unsigned long long int __unused2;
+    unsigned long long int __uclibc_unused1;
+    unsigned long long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/i386/bits/fenv.h 
b/libc/sysdeps/linux/i386/bits/fenv.h
index 9bd976fc1..2462b7477 100644
--- a/libc/sysdeps/linux/i386/bits/fenv.h
+++ b/libc/sysdeps/linux/i386/bits/fenv.h
@@ -65,18 +65,18 @@ typedef unsigned short int fexcept_t;
  typedef struct
    {
      unsigned short int __control_word;
-    unsigned short int __unused1;
+    unsigned short int __uclibc_unused1;
      unsigned short int __status_word;
-    unsigned short int __unused2;
+    unsigned short int __uclibc_unused2;
      unsigned short int __tags;
-    unsigned short int __unused3;
+    unsigned short int __uclibc_unused3;
      unsigned int __eip;
      unsigned short int __cs_selector;
      unsigned int __opcode:11;
-    unsigned int __unused4:5;
+    unsigned int __uclibc_unused4:5;
      unsigned int __data_offset;
      unsigned short int __data_selector;
-    unsigned short int __unused5;
+    unsigned short int __uclibc_unused5;
    }
  fenv_t;

diff --git a/libc/sysdeps/linux/i386/bits/kernel_stat.h 
b/libc/sysdeps/linux/i386/bits/kernel_stat.h
index 231a984b4..ffe70cbf7 100644
--- a/libc/sysdeps/linux/i386/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/i386/bits/kernel_stat.h
@@ -20,8 +20,8 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  struct kernel_stat64 {
diff --git a/libc/sysdeps/linux/ia64/bits/ipc.h 
b/libc/sysdeps/linux/ia64/bits/ipc.h
index eb014d7b9..6c93a1fa6 100644
--- a/libc/sysdeps/linux/ia64/bits/ipc.h
+++ b/libc/sysdeps/linux/ia64/bits/ipc.h
@@ -48,6 +48,6 @@ struct ipc_perm
      __mode_t mode;            /* Read/write permission.  */
      unsigned short int __seq;        /* Sequence number.  */
      unsigned short int __pad1;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/ia64/bits/msq.h 
b/libc/sysdeps/linux/ia64/bits/msq.h
index 2dea98627..fe2181da2 100644
--- a/libc/sysdeps/linux/ia64/bits/msq.h
+++ b/libc/sysdeps/linux/ia64/bits/msq.h
@@ -40,8 +40,8 @@ struct msqid_ds
    unsigned long int msg_qbytes;    /* max number of bytes allowed on 
queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/ia64/bits/sem.h 
b/libc/sysdeps/linux/ia64/bits/sem.h
index aa56e155d..b081cb038 100644
--- a/libc/sysdeps/linux/ia64/bits/sem.h
+++ b/libc/sysdeps/linux/ia64/bits/sem.h
@@ -43,8 +43,8 @@ struct semid_ds
    __time_t sem_otime;            /* last semop() time */
    __time_t sem_ctime;            /* last time changed by semctl() */
    unsigned long int sem_nsems;        /* number of semaphores in set */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/ia64/bits/shm.h 
b/libc/sysdeps/linux/ia64/bits/shm.h
index 0d0c96e6f..d91c90459 100644
--- a/libc/sysdeps/linux/ia64/bits/shm.h
+++ b/libc/sysdeps/linux/ia64/bits/shm.h
@@ -51,8 +51,8 @@ struct shmid_ds
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };

  #ifdef __USE_MISC
@@ -74,10 +74,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/ia64/bits/stat.h 
b/libc/sysdeps/linux/ia64/bits/stat.h
index e868b0950..6723166e7 100644
--- a/libc/sysdeps/linux/ia64/bits/stat.h
+++ b/libc/sysdeps/linux/ia64/bits/stat.h
@@ -61,7 +61,7 @@ struct stat
  #endif
      __blksize_t st_blksize;    /* Optimal block size for I/O.  */
      __blkcnt_t st_blocks;    /* Nr. 512-byte blocks allocated.  */
-    long int __unused[3];
+    long int __uclibc_unused[3];
    };

  #ifdef __USE_LARGEFILE64
@@ -100,7 +100,7 @@ struct stat64
  #endif
      __blksize_t st_blksize;    /* Optimal block size for I/O.  */
      __blkcnt64_t st_blocks;    /* Nr. 512-byte blocks allocated. */
-    long int __unused[3];
+    long int __uclibc_unused[3];
    };
  #endif

diff --git a/libc/sysdeps/linux/lm32/bits/kernel_stat.h 
b/libc/sysdeps/linux/lm32/bits/kernel_stat.h
index c998b56c7..0dc589a5b 100644
--- a/libc/sysdeps/linux/lm32/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/lm32/bits/kernel_stat.h
@@ -22,8 +22,8 @@ struct kernel_stat
          struct timespec st_atim;        /* Time of last access. */
          struct timespec st_mtim;        /* Time of last modification. */
          struct timespec st_ctim;        /* Time of last status change. */
-        unsigned int    __unused4;
-        unsigned int    __unused5;
+        unsigned int    __uclibc_unused4;
+        unsigned int    __uclibc_unused5;
  };

  struct kernel_stat64
@@ -43,8 +43,8 @@ struct kernel_stat64
          struct timespec st_atim;        /* Time of last access. */
          struct timespec st_mtim;        /* Time of last modification. */
          struct timespec st_ctim;        /* Time of last status change. */
-        unsigned int    __unused4;
-        unsigned int    __unused5;
+        unsigned int    __uclibc_unused4;
+        unsigned int    __uclibc_unused5;
  };

  #endif  /*  _BITS_STAT_STRUCT_H */
diff --git a/libc/sysdeps/linux/m68k/bits/kernel_stat.h 
b/libc/sysdeps/linux/m68k/bits/kernel_stat.h
index 3911c9bbf..f3b1bd645 100644
--- a/libc/sysdeps/linux/m68k/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/m68k/bits/kernel_stat.h
@@ -21,8 +21,8 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  struct kernel_stat64 {
diff --git a/libc/sysdeps/linux/m68k/bits/stat.h 
b/libc/sysdeps/linux/m68k/bits/stat.h
index d71670db8..7b9c3d144 100644
--- a/libc/sysdeps/linux/m68k/bits/stat.h
+++ b/libc/sysdeps/linux/m68k/bits/stat.h
@@ -82,8 +82,8 @@ struct stat
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
  #ifndef __USE_FILE_OFFSET64
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
  #else
      __ino64_t st_ino;            /* File serial number.    */
  #endif
diff --git a/libc/sysdeps/linux/metag/bits/ipc.h 
b/libc/sysdeps/linux/metag/bits/ipc.h
index d50e39f6a..50d9514e9 100644
--- a/libc/sysdeps/linux/metag/bits/ipc.h
+++ b/libc/sysdeps/linux/metag/bits/ipc.h
@@ -49,6 +49,6 @@ struct ipc_perm
      unsigned int mode;            /* Read/write permission.  */
      unsigned short __seq;        /* Sequence number.  */
      unsigned short __pad1;
-    unsigned long __unused1;
-    unsigned long __unused2;
+    unsigned long __uclibc_unused1;
+    unsigned long __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/mips/bits/ipc.h 
b/libc/sysdeps/linux/mips/bits/ipc.h
index 97a8da032..b47c1e706 100644
--- a/libc/sysdeps/linux/mips/bits/ipc.h
+++ b/libc/sysdeps/linux/mips/bits/ipc.h
@@ -49,6 +49,6 @@ struct ipc_perm
      unsigned int mode;            /* Read/write permission.  */
      unsigned short int __seq;        /* Sequence number.  */
      unsigned short int __pad1;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
  };
diff --git a/libc/sysdeps/linux/mips/bits/msq.h 
b/libc/sysdeps/linux/mips/bits/msq.h
index fe09cfadf..bcf1073e8 100644
--- a/libc/sysdeps/linux/mips/bits/msq.h
+++ b/libc/sysdeps/linux/mips/bits/msq.h
@@ -64,8 +64,8 @@ struct msqid_ds
    msglen_t msg_qbytes;        /* max number of bytes allowed on queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused4;
-  unsigned long int __unused5;
+  unsigned long int __uclibc_unused4;
+  unsigned long int __uclibc_unused5;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/mips/bits/sem.h 
b/libc/sysdeps/linux/mips/bits/sem.h
index 4d412a2cb..3e4e9682b 100644
--- a/libc/sysdeps/linux/mips/bits/sem.h
+++ b/libc/sysdeps/linux/mips/bits/sem.h
@@ -41,8 +41,8 @@ struct semid_ds
    __time_t sem_otime;            /* last semop() time */
    __time_t sem_ctime;            /* last time changed by semctl() */
    unsigned long int sem_nsems;        /* number of semaphores in set */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/mips/bits/shm.h 
b/libc/sysdeps/linux/mips/bits/shm.h
index 43869b3f4..bb87ba13d 100644
--- a/libc/sysdeps/linux/mips/bits/shm.h
+++ b/libc/sysdeps/linux/mips/bits/shm.h
@@ -52,8 +52,8 @@ struct shmid_ds
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };

  #ifdef __USE_MISC
@@ -74,10 +74,10 @@ struct shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/nds32/bits/kernel_stat.h 
b/libc/sysdeps/linux/nds32/bits/kernel_stat.h
index 9e5c40d15..3c0911c01 100644
--- a/libc/sysdeps/linux/nds32/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/nds32/bits/kernel_stat.h
@@ -30,8 +30,8 @@ struct kernel_stat {
      struct timespec    st_atim;
      struct timespec    st_mtim;
      struct timespec    st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  struct kernel_stat64 {
diff --git a/libc/sysdeps/linux/nds32/bits/shm.h 
b/libc/sysdeps/linux/nds32/bits/shm.h
index 51e1ece7f..8904b6252 100644
--- a/libc/sysdeps/linux/nds32/bits/shm.h
+++ b/libc/sysdeps/linux/nds32/bits/shm.h
@@ -55,16 +55,16 @@ struct shmid_ds
      struct ipc_perm shm_perm;        /* operation permission struct */
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -85,10 +85,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/nds32/bits/stat.h 
b/libc/sysdeps/linux/nds32/bits/stat.h
index fe25292cb..c4e09e0f2 100644
--- a/libc/sysdeps/linux/nds32/bits/stat.h
+++ b/libc/sysdeps/linux/nds32/bits/stat.h
@@ -86,8 +86,8 @@ struct stat
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
  #ifndef __USE_FILE_OFFSET64
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
  #else
      __ino64_t st_ino;            /* File serial number.    */
  #endif
diff --git a/libc/sysdeps/linux/powerpc/bits/ipc.h 
b/libc/sysdeps/linux/powerpc/bits/ipc.h
index e21debf5d..f40ffbc24 100644
--- a/libc/sysdeps/linux/powerpc/bits/ipc.h
+++ b/libc/sysdeps/linux/powerpc/bits/ipc.h
@@ -50,12 +50,12 @@ struct ipc_perm
  #if 0
      unsigned long __seq;    /* Sequence number. */
      unsigned int __pad2;
-    unsigned long long int __unused1;
-    unsigned long long int __unused2;
+    unsigned long long int __uclibc_unused1;
+    unsigned long long int __uclibc_unused2;
  #else
      __uint32_t __seq;        /* Sequence number.  */
      __uint32_t __pad1;
-    __uint64_t __unused1;
-    __uint64_t __unused2;
+    __uint64_t __uclibc_unused1;
+    __uint64_t __uclibc_unused2;
  #endif
    };
diff --git a/libc/sysdeps/linux/powerpc/bits/kernel_stat.h 
b/libc/sysdeps/linux/powerpc/bits/kernel_stat.h
index 579b5b4e2..ce62b2ba2 100644
--- a/libc/sysdeps/linux/powerpc/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/powerpc/bits/kernel_stat.h
@@ -42,8 +42,8 @@ struct kernel_stat64 {
      struct timespec st_atim;    /* Time of last access.  */
      struct timespec st_mtim;    /* Time of last modification.  */
      struct timespec st_ctim;    /* Time of last status change.  */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
  };

  #endif    /*  _BITS_STAT_STRUCT_H */
diff --git a/libc/sysdeps/linux/powerpc/bits/msq.h 
b/libc/sysdeps/linux/powerpc/bits/msq.h
index 70d4f06e3..995f5157b 100644
--- a/libc/sysdeps/linux/powerpc/bits/msq.h
+++ b/libc/sysdeps/linux/powerpc/bits/msq.h
@@ -38,15 +38,15 @@ struct msqid_ds
  {
    struct ipc_perm msg_perm;    /* structure describing operation 
permission */
  #if __WORDSIZE == 32
-  unsigned int __unused1;
+  unsigned int __uclibc_unused1;
  #endif
    __time_t msg_stime;          /* time of last msgsnd command */
  #if __WORDSIZE == 32
-  unsigned int __unused2;
+  unsigned int __uclibc_unused2;
  #endif
    __time_t msg_rtime;          /* time of last msgrcv command */
  #if __WORDSIZE == 32
-  unsigned int __unused3;
+  unsigned int __uclibc_unused3;
  #endif
    __time_t msg_ctime;          /* time of last change */
    unsigned long __msg_cbytes; /* current number of bytes on queue */
@@ -54,8 +54,8 @@ struct msqid_ds
    msglen_t msg_qbytes;         /* max number of bytes allowed on queue */
    __pid_t msg_lspid;           /* pid of last msgsnd() */
    __pid_t msg_lrpid;           /* pid of last msgrcv() */
-  unsigned long __unused4;
-  unsigned long __unused5;
+  unsigned long __uclibc_unused4;
+  unsigned long __uclibc_unused5;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/powerpc/bits/sem.h 
b/libc/sysdeps/linux/powerpc/bits/sem.h
index 271a607ca..a9d895374 100644
--- a/libc/sysdeps/linux/powerpc/bits/sem.h
+++ b/libc/sysdeps/linux/powerpc/bits/sem.h
@@ -40,16 +40,16 @@ struct semid_ds
  {
    struct ipc_perm sem_perm;            /* operation permission struct */
  #if __WORDSIZE == 32
-  unsigned int __unused1;
+  unsigned int __uclibc_unused1;
  #endif
    __time_t sem_otime;                  /* last semop() time */
  #if __WORDSIZE == 32
-  unsigned int __unused2;
+  unsigned int __uclibc_unused2;
  #endif
    __time_t sem_ctime;                  /* last time changed by semctl() */
    unsigned long int sem_nsems;         /* number of semaphores in set */
-  unsigned long __unused3;
-  unsigned long __unused4;
+  unsigned long __uclibc_unused3;
+  unsigned long __uclibc_unused4;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/powerpc/bits/shm.h 
b/libc/sysdeps/linux/powerpc/bits/shm.h
index 63e7f6ed1..7ba17f8ad 100644
--- a/libc/sysdeps/linux/powerpc/bits/shm.h
+++ b/libc/sysdeps/linux/powerpc/bits/shm.h
@@ -50,26 +50,26 @@ struct shmid_ds
    {
      struct ipc_perm shm_perm;          /* operation permission struct */
  #if __WORDSIZE == 32
-    unsigned int __unused1;
+    unsigned int __uclibc_unused1;
  #endif
      __time_t shm_atime;                        /* time of last shmat() */
  #if __WORDSIZE == 32
-    unsigned int __unused2;
+    unsigned int __uclibc_unused2;
  #endif
      __time_t shm_dtime;                        /* time of last shmdt() */
  #if __WORDSIZE == 32
-    unsigned int __unused3;
+    unsigned int __uclibc_unused3;
  #endif
      __time_t shm_ctime;            /* time of last change by shmctl() */
  #if __WORDSIZE == 32
-    unsigned int __unused4;
+    unsigned int __uclibc_unused4;
  #endif
      size_t shm_segsz;                  /* size of segment in bytes */
      __pid_t shm_cpid;                  /* pid of creator */
      __pid_t shm_lpid;                  /* pid of last shmop */
      shmatt_t shm_nattch;               /* number of current attaches */
-    unsigned long __unused5;
-    unsigned long __unused6;
+    unsigned long __uclibc_unused5;
+    unsigned long __uclibc_unused6;
    };

  #ifdef __USE_MISC
@@ -91,10 +91,10 @@ struct shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/powerpc/bits/stat.h 
b/libc/sysdeps/linux/powerpc/bits/stat.h
index a90043f8a..7494586b5 100644
--- a/libc/sysdeps/linux/powerpc/bits/stat.h
+++ b/libc/sysdeps/linux/powerpc/bits/stat.h
@@ -80,8 +80,8 @@ struct stat
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };


@@ -120,8 +120,8 @@ struct stat64
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };
  # endif /* __USE_LARGEFILE64 */

diff --git a/libc/sysdeps/linux/riscv64/bits/shm.h 
b/libc/sysdeps/linux/riscv64/bits/shm.h
index dbe4851f9..8a11c7050 100644
--- a/libc/sysdeps/linux/riscv64/bits/shm.h
+++ b/libc/sysdeps/linux/riscv64/bits/shm.h
@@ -38,16 +38,16 @@ struct shmid_ds
      struct ipc_perm shm_perm;        /* operation permission struct */
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -69,10 +69,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/sh/bits/kernel_stat.h 
b/libc/sysdeps/linux/sh/bits/kernel_stat.h
index 5b51b3cd3..c32b700ae 100644
--- a/libc/sysdeps/linux/sh/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/sh/bits/kernel_stat.h
@@ -22,8 +22,8 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    unsigned long  __unused4;
-    unsigned long  __unused5;
+    unsigned long  __uclibc_unused4;
+    unsigned long  __uclibc_unused5;
  };

  struct kernel_stat64 {
diff --git a/libc/sysdeps/linux/sh/bits/shm.h 
b/libc/sysdeps/linux/sh/bits/shm.h
index 646e5badc..f5e8f6fd5 100644
--- a/libc/sysdeps/linux/sh/bits/shm.h
+++ b/libc/sysdeps/linux/sh/bits/shm.h
@@ -56,16 +56,16 @@ struct shmid_ds
      struct ipc_perm shm_perm;        /* operation permission struct */
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -87,10 +87,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/sparc/bits/fcntl.h 
b/libc/sysdeps/linux/sparc/bits/fcntl.h
index 9ccc5946d..b93e3d354 100644
--- a/libc/sysdeps/linux/sparc/bits/fcntl.h
+++ b/libc/sysdeps/linux/sparc/bits/fcntl.h
@@ -163,7 +163,7 @@ struct flock
      __off64_t l_len;    /* Size of the locked area; zero means until 
EOF.  */
  #endif
      __pid_t l_pid;    /* Process holding the lock.  */
-    short int __unused;
+    short int __uclibc_unused;
    };

  #ifdef __USE_LARGEFILE64
@@ -174,7 +174,7 @@ struct flock64
      __off64_t l_start;    /* Offset where the lock begins.  */
      __off64_t l_len;    /* Size of the locked area; zero means until 
EOF.  */
      __pid_t l_pid;    /* Process holding the lock.  */
-    short int __unused;
+    short int __uclibc_unused;
    };
  #endif

diff --git a/libc/sysdeps/linux/sparc/bits/ipc.h 
b/libc/sysdeps/linux/sparc/bits/ipc.h
index 017d0e1bc..193097ff8 100644
--- a/libc/sysdeps/linux/sparc/bits/ipc.h
+++ b/libc/sysdeps/linux/sparc/bits/ipc.h
@@ -49,6 +49,6 @@ struct ipc_perm
      unsigned short int mode;        /* Read/write permission.  */
      unsigned short int __pad2;
      unsigned short int __seq;        /* Sequence number.  */
-    unsigned long long int __unused1;
-    unsigned long long int __unused2;
+    unsigned long long int __uclibc_unused1;
+    unsigned long long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/sparc/bits/msq.h 
b/libc/sysdeps/linux/sparc/bits/msq.h
index b8bcf31bf..2558a7bcb 100644
--- a/libc/sysdeps/linux/sparc/bits/msq.h
+++ b/libc/sysdeps/linux/sparc/bits/msq.h
@@ -47,8 +47,8 @@ struct msqid_ds
    msglen_t msg_qbytes;        /* max number of bytes allowed on queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/sparc/bits/sem.h 
b/libc/sysdeps/linux/sparc/bits/sem.h
index 3faaadd96..04c579fc6 100644
--- a/libc/sysdeps/linux/sparc/bits/sem.h
+++ b/libc/sysdeps/linux/sparc/bits/sem.h
@@ -42,8 +42,8 @@ struct semid_ds
    unsigned int __pad2;
    __time_t sem_ctime;            /* last time changed by semctl() */
    unsigned long int sem_nsems;        /* number of semaphores in set */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/sparc/bits/shm.h 
b/libc/sysdeps/linux/sparc/bits/shm.h
index 7ef10fc76..3f519ce8e 100644
--- a/libc/sysdeps/linux/sparc/bits/shm.h
+++ b/libc/sysdeps/linux/sparc/bits/shm.h
@@ -58,8 +58,8 @@ struct shmid_ds
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };

  #ifdef __USE_MISC
@@ -81,10 +81,10 @@ struct    shminfo
      unsigned long shmmni;
      unsigned long shmseg;
      unsigned long shmall;
-    unsigned long __unused1;
-    unsigned long __unused2;
-    unsigned long __unused3;
-    unsigned long __unused4;
+    unsigned long __uclibc_unused1;
+    unsigned long __uclibc_unused2;
+    unsigned long __uclibc_unused3;
+    unsigned long __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/sparc/bits/stat.h 
b/libc/sysdeps/linux/sparc/bits/stat.h
index 7ec7d9b23..b88885fe2 100644
--- a/libc/sysdeps/linux/sparc/bits/stat.h
+++ b/libc/sysdeps/linux/sparc/bits/stat.h
@@ -74,8 +74,8 @@ struct stat
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_LARGEFILE64
@@ -114,8 +114,8 @@ struct stat64
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };
  #endif

diff --git a/libc/sysdeps/linux/sparc64/bits/fcntl.h 
b/libc/sysdeps/linux/sparc64/bits/fcntl.h
index dad3470b8..2443a92c8 100644
--- a/libc/sysdeps/linux/sparc64/bits/fcntl.h
+++ b/libc/sysdeps/linux/sparc64/bits/fcntl.h
@@ -159,7 +159,7 @@ struct flock
      __off64_t l_len;    /* Size of the locked area; zero means until 
EOF.  */
  #endif
      __pid_t l_pid;    /* Process holding the lock.  */
-    short int __unused;
+    short int __uclibc_unused;
    };

  #ifdef __USE_LARGEFILE64
@@ -170,7 +170,7 @@ struct flock64
      __off64_t l_start;    /* Offset where the lock begins.  */
      __off64_t l_len;    /* Size of the locked area; zero means until 
EOF.  */
      __pid_t l_pid;    /* Process holding the lock.  */
-    short int __unused;
+    short int __uclibc_unused;
    };
  #endif

diff --git a/libc/sysdeps/linux/sparc64/bits/ipc.h 
b/libc/sysdeps/linux/sparc64/bits/ipc.h
index 7fedafa61..56247ab4e 100644
--- a/libc/sysdeps/linux/sparc64/bits/ipc.h
+++ b/libc/sysdeps/linux/sparc64/bits/ipc.h
@@ -48,6 +48,6 @@ struct ipc_perm
      __mode_t mode;            /* Read/write permission.  */
      unsigned short int __pad1;
      unsigned short int __seq;        /* Sequence number.  */
-    unsigned long long int __unused1;
-    unsigned long long int __unused2;
+    unsigned long long int __uclibc_unused1;
+    unsigned long long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/sparc64/bits/msq.h 
b/libc/sysdeps/linux/sparc64/bits/msq.h
index f514e442c..f31caf2f7 100644
--- a/libc/sysdeps/linux/sparc64/bits/msq.h
+++ b/libc/sysdeps/linux/sparc64/bits/msq.h
@@ -44,8 +44,8 @@ struct msqid_ds
    msglen_t msg_qbytes;        /* max number of bytes allowed on queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/sparc64/bits/sem.h 
b/libc/sysdeps/linux/sparc64/bits/sem.h
index acc21742d..9e88db2e2 100644
--- a/libc/sysdeps/linux/sparc64/bits/sem.h
+++ b/libc/sysdeps/linux/sparc64/bits/sem.h
@@ -40,8 +40,8 @@ struct semid_ds
    __time_t sem_otime;            /* last semop() time */
    __time_t sem_ctime;            /* last time changed by semctl() */
    unsigned long int sem_nsems;        /* number of semaphores in set */
-  unsigned long int __unused1;
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused1;
+  unsigned long int __uclibc_unused2;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/sparc64/bits/shm.h 
b/libc/sysdeps/linux/sparc64/bits/shm.h
index a5d8c3464..b76c4c32b 100644
--- a/libc/sysdeps/linux/sparc64/bits/shm.h
+++ b/libc/sysdeps/linux/sparc64/bits/shm.h
@@ -55,8 +55,8 @@ struct shmid_ds
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };

  #ifdef __USE_MISC
@@ -78,10 +78,10 @@ struct    shminfo
      unsigned long shmmni;
      unsigned long shmseg;
      unsigned long shmall;
-    unsigned long __unused1;
-    unsigned long __unused2;
-    unsigned long __unused3;
-    unsigned long __unused4;
+    unsigned long __uclibc_unused1;
+    unsigned long __uclibc_unused2;
+    unsigned long __uclibc_unused3;
+    unsigned long __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/sparc64/bits/stat.h 
b/libc/sysdeps/linux/sparc64/bits/stat.h
index cae973b4e..8516b159c 100644
--- a/libc/sysdeps/linux/sparc64/bits/stat.h
+++ b/libc/sysdeps/linux/sparc64/bits/stat.h
@@ -79,8 +79,8 @@ struct stat
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_LARGEFILE64
@@ -122,8 +122,8 @@ struct stat64
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };
  #endif

diff --git a/libc/sysdeps/linux/tile/bits/shm.h 
b/libc/sysdeps/linux/tile/bits/shm.h
index dbe4851f9..8a11c7050 100644
--- a/libc/sysdeps/linux/tile/bits/shm.h
+++ b/libc/sysdeps/linux/tile/bits/shm.h
@@ -38,16 +38,16 @@ struct shmid_ds
      struct ipc_perm shm_perm;        /* operation permission struct */
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -69,10 +69,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/x86_64/bits/fenv.h 
b/libc/sysdeps/linux/x86_64/bits/fenv.h
index 8e38c16ec..f16b64ad3 100644
--- a/libc/sysdeps/linux/x86_64/bits/fenv.h
+++ b/libc/sysdeps/linux/x86_64/bits/fenv.h
@@ -69,18 +69,18 @@ typedef unsigned short int fexcept_t;
  typedef struct
    {
      unsigned short int __control_word;
-    unsigned short int __unused1;
+    unsigned short int __uclibc_unused1;
      unsigned short int __status_word;
-    unsigned short int __unused2;
+    unsigned short int __uclibc_unused2;
      unsigned short int __tags;
-    unsigned short int __unused3;
+    unsigned short int __uclibc_unused3;
      unsigned int __eip;
      unsigned short int __cs_selector;
      unsigned int __opcode:11;
-    unsigned int __unused4:5;
+    unsigned int __uclibc_unused4:5;
      unsigned int __data_offset;
      unsigned short int __data_selector;
-    unsigned short int __unused5;
+    unsigned short int __uclibc_unused5;
  #if __WORDSIZE == 64
      unsigned int __mxcsr;
  #endif
diff --git a/libc/sysdeps/linux/x86_64/bits/kernel_stat.h 
b/libc/sysdeps/linux/x86_64/bits/kernel_stat.h
index e194a7f76..d01d81d69 100644
--- a/libc/sysdeps/linux/x86_64/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/x86_64/bits/kernel_stat.h
@@ -21,7 +21,7 @@ struct kernel_stat {
      struct timespec st_atim;
      struct timespec st_mtim;
      struct timespec st_ctim;
-    long           __unused[3];
+    long           __uclibc_unused[3];
  };

  /* x86-64 stat64 is same as stat */
diff --git a/libc/sysdeps/linux/x86_64/bits/msq.h 
b/libc/sysdeps/linux/x86_64/bits/msq.h
index 838910713..3141266bc 100644
--- a/libc/sysdeps/linux/x86_64/bits/msq.h
+++ b/libc/sysdeps/linux/x86_64/bits/msq.h
@@ -39,23 +39,23 @@ struct msqid_ds
    struct ipc_perm msg_perm;    /* structure describing operation 
permission */
    __time_t msg_stime;        /* time of last msgsnd command */
  #if __WORDSIZE == 32
-  unsigned long int __unused1;
+  unsigned long int __uclibc_unused1;
  #endif
    __time_t msg_rtime;        /* time of last msgrcv command */
  #if __WORDSIZE == 32
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused2;
  #endif
    __time_t msg_ctime;        /* time of last change */
  #if __WORDSIZE == 32
-  unsigned long int __unused3;
+  unsigned long int __uclibc_unused3;
  #endif
    unsigned long int __msg_cbytes; /* current number of bytes on queue */
    msgqnum_t msg_qnum;        /* number of messages currently on queue */
    msglen_t msg_qbytes;        /* max number of bytes allowed on queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused4;
-  unsigned long int __unused5;
+  unsigned long int __uclibc_unused4;
+  unsigned long int __uclibc_unused5;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/x86_64/bits/sem.h 
b/libc/sysdeps/linux/x86_64/bits/sem.h
index 8c09031c7..9dfab87cb 100644
--- a/libc/sysdeps/linux/x86_64/bits/sem.h
+++ b/libc/sysdeps/linux/x86_64/bits/sem.h
@@ -39,12 +39,12 @@ struct semid_ds
  {
    struct ipc_perm sem_perm;        /* operation permission struct */
    __time_t sem_otime;            /* last semop() time */
-  unsigned long int __unused1;
+  unsigned long int __uclibc_unused1;
    __time_t sem_ctime;            /* last time changed by semctl() */
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused2;
    unsigned long int sem_nsems;        /* number of semaphores in set */
-  unsigned long int __unused3;
-  unsigned long int __unused4;
+  unsigned long int __uclibc_unused3;
+  unsigned long int __uclibc_unused4;
  };

  /* The user should define a union like the following to use it for 
arguments
diff --git a/libc/sysdeps/linux/x86_64/bits/shm.h 
b/libc/sysdeps/linux/x86_64/bits/shm.h
index 3a25de562..316895853 100644
--- a/libc/sysdeps/linux/x86_64/bits/shm.h
+++ b/libc/sysdeps/linux/x86_64/bits/shm.h
@@ -52,21 +52,21 @@ struct shmid_ds
      size_t shm_segsz;            /* size of segment in bytes */
      __time_t shm_atime;            /* time of last shmat() */
  #if __WORDSIZE == 32
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
  #endif
      __time_t shm_dtime;            /* time of last shmdt() */
  #if __WORDSIZE == 32
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
  #endif
      __time_t shm_ctime;            /* time of last change by shmctl() */
  #if __WORDSIZE == 32
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
  #endif
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -88,10 +88,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/x86_64/bits/stat.h 
b/libc/sysdeps/linux/x86_64/bits/stat.h
index e25f01521..a7412c8f9 100644
--- a/libc/sysdeps/linux/x86_64/bits/stat.h
+++ b/libc/sysdeps/linux/x86_64/bits/stat.h
@@ -99,11 +99,11 @@ struct stat
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
  #if __WORDSIZE == 64
-    long int __unused[3];
+    long int __uclibc_unused[3];
  #else
  # ifndef __USE_FILE_OFFSET64
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
  # else
      __ino64_t st_ino;            /* File serial number.    */
  # endif
@@ -160,7 +160,7 @@ struct stat64
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
  #if __WORDSIZE == 64
-    long int __unused[3];
+    long int __uclibc_unused[3];
  #else
      __ino64_t st_ino;            /* File serial number.        */
  #endif
diff --git a/libc/sysdeps/linux/xtensa/bits/ipc.h 
b/libc/sysdeps/linux/xtensa/bits/ipc.h
index 2ad5fc0a2..f4222de8c 100644
--- a/libc/sysdeps/linux/xtensa/bits/ipc.h
+++ b/libc/sysdeps/linux/xtensa/bits/ipc.h
@@ -48,6 +48,6 @@ struct ipc_perm
      __gid_t cgid;            /* Creator's group ID.  */
      unsigned int mode;            /* Read/write permission.  */
      unsigned int __seq;            /* Sequence number.  */
-    unsigned long int __unused1;
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
    };
diff --git a/libc/sysdeps/linux/xtensa/bits/kernel_stat.h 
b/libc/sysdeps/linux/xtensa/bits/kernel_stat.h
index 5e4f5c4e5..d884344d3 100644
--- a/libc/sysdeps/linux/xtensa/bits/kernel_stat.h
+++ b/libc/sysdeps/linux/xtensa/bits/kernel_stat.h
@@ -33,13 +33,13 @@ struct kernel_stat64 {
      unsigned long long st_rdev;    /* Device number, if device. */
      long long st_size;        /* Size of file, in bytes. */
      unsigned long st_blksize;    /* Optimal block size for I/O. */
-    unsigned long __unused2;
+    unsigned long __uclibc_unused2;
      unsigned long long st_blocks;    /* Number 512-byte blocks 
allocated. */
      struct timespec st_atim;    /* Time of last access. */
      struct timespec st_mtim;    /* Time of last modification. */
      struct timespec st_ctim;    /* Time of last status change. */
-    unsigned long __unused4;
-    unsigned long __unused5;
+    unsigned long __uclibc_unused4;
+    unsigned long __uclibc_unused5;
  };

  #endif    /* _BITS_STAT_STRUCT_H */
diff --git a/libc/sysdeps/linux/xtensa/bits/msq.h 
b/libc/sysdeps/linux/xtensa/bits/msq.h
index e4f3fa317..0f65b4274 100644
--- a/libc/sysdeps/linux/xtensa/bits/msq.h
+++ b/libc/sysdeps/linux/xtensa/bits/msq.h
@@ -38,19 +38,19 @@ struct msqid_ds
  {
    struct ipc_perm msg_perm;    /* structure describing operation 
permission */
  #if defined (__XTENSA_EB__)
-  unsigned long int __unused1;
+  unsigned long int __uclibc_unused1;
    __time_t msg_stime;        /* time of last msgsnd command */
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused2;
    __time_t msg_rtime;        /* time of last msgrcv command */
-  unsigned long int __unused3;
+  unsigned long int __uclibc_unused3;
    __time_t msg_ctime;        /* time of last change */
  #elif defined (__XTENSA_EL__)
    __time_t msg_stime;        /* time of last msgsnd command */
-  unsigned long int __unused1;
+  unsigned long int __uclibc_unused1;
    __time_t msg_rtime;        /* time of last msgrcv command */
-  unsigned long int __unused2;
+  unsigned long int __uclibc_unused2;
    __time_t msg_ctime;        /* time of last change */
-  unsigned long int __unused3;
+  unsigned long int __uclibc_unused3;
  #else
  # error endian order not defined
  #endif
@@ -59,8 +59,8 @@ struct msqid_ds
    msglen_t msg_qbytes;        /* max number of bytes allowed on queue */
    __pid_t msg_lspid;        /* pid of last msgsnd() */
    __pid_t msg_lrpid;        /* pid of last msgrcv() */
-  unsigned long int __unused4;
-  unsigned long int __unused5;
+  unsigned long int __uclibc_unused4;
+  unsigned long int __uclibc_unused5;
  };

  #ifdef __USE_MISC
diff --git a/libc/sysdeps/linux/xtensa/bits/shm.h 
b/libc/sysdeps/linux/xtensa/bits/shm.h
index d288a1cca..d1e13cb49 100644
--- a/libc/sysdeps/linux/xtensa/bits/shm.h
+++ b/libc/sysdeps/linux/xtensa/bits/shm.h
@@ -52,17 +52,17 @@ struct shmid_ds
      size_t shm_segsz;            /* size of segment in bytes */
  #if defined (__XTENSA_EL__)
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_ctime;            /* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
  #elif defined (__XTENSA_EB__)
-    unsigned long int __unused1;
+    unsigned long int __uclibc_unused1;
      __time_t shm_atime;            /* time of last shmat() */
-    unsigned long int __unused2;
+    unsigned long int __uclibc_unused2;
      __time_t shm_dtime;            /* time of last shmdt() */
-    unsigned long int __unused3;
+    unsigned long int __uclibc_unused3;
      __time_t shm_ctime;            /* time of last change by shmctl() */
  #else
  # error endian order not defined
@@ -70,8 +70,8 @@ struct shmid_ds
      __pid_t shm_cpid;            /* pid of creator */
      __pid_t shm_lpid;            /* pid of last shmop */
      shmatt_t shm_nattch;        /* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_MISC
@@ -93,10 +93,10 @@ struct    shminfo
      unsigned long int shmmni;
      unsigned long int shmseg;
      unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __uclibc_unused1;
+    unsigned long int __uclibc_unused2;
+    unsigned long int __uclibc_unused3;
+    unsigned long int __uclibc_unused4;
    };

  struct shm_info
diff --git a/libc/sysdeps/linux/xtensa/bits/stat.h 
b/libc/sysdeps/linux/xtensa/bits/stat.h
index c61b188b7..045a017fd 100644
--- a/libc/sysdeps/linux/xtensa/bits/stat.h
+++ b/libc/sysdeps/linux/xtensa/bits/stat.h
@@ -75,8 +75,8 @@ struct stat
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __uclibc_unused4;
+    unsigned long int __uclibc_unused5;
    };

  #ifdef __USE_LARGEFILE64
@@ -112,8 +112,8 @@ struct stat64
      __time_t st_ctime;            /* Time of last status change. */
      unsigned long int st_ctimensec;    /* Nsecs of last status change.  */
  #endif
-    unsigned long __unused4;
-    unsigned long __unused5;
+    unsigned long __uclibc_unused4;
+    unsigned long __uclibc_unused5;
    };
  #endif

diff --git a/libpthread/nptl/sysdeps/i386/tls.h 
b/libpthread/nptl/sysdeps/i386/tls.h
index 17c80e5fc..63c77c561 100644
--- a/libpthread/nptl/sysdeps/i386/tls.h
+++ b/libpthread/nptl/sysdeps/i386/tls.h
@@ -55,7 +55,7 @@ typedef struct
  #ifndef __ASSUME_PRIVATE_FUTEX
    int private_futex;
  #else
-  int __unused1;
+  int __uclibc_unused1;
  #endif
    /* Reservation of some values for the TM ABI.  */
    void *__private_tm[5];
diff --git a/libpthread/nptl/sysdeps/x86_64/tls.h 
b/libpthread/nptl/sysdeps/x86_64/tls.h
index d8b82ede9..41b3c3bf6 100644
--- a/libpthread/nptl/sysdeps/x86_64/tls.h
+++ b/libpthread/nptl/sysdeps/x86_64/tls.h
@@ -58,7 +58,7 @@ typedef struct
  # ifndef __ASSUME_PRIVATE_FUTEX
    int private_futex;
  # else
-  int __unused1;
+  int __uclibc_unused1;
  # endif
  # if __WORDSIZE == 64
    int rtld_must_xmm_save;
@@ -66,7 +66,7 @@ typedef struct
    /* Reservation of some values for the TM ABI.  */
    void *__private_tm[5];
  # if __WORDSIZE == 64
-  long int __unused2;
+  long int __uclibc_unused2;
    /* Have space for the post-AVX register size.  */
    __m128 rtld_savespace_sse[8][4];

