[1/3] libsanitizer: Fix !statfs64 builds

diff --git a/libsanitizer/config.h.in b/libsanitizer/config.h.in
index e4b2786..4bd6a7f 100644
--- a/libsanitizer/config.h.in
+++ b/libsanitizer/config.h.in
@@ -61,12 +61,18 @@ 
 /* Define to 1 if you have the <sys/mman.h> header file. */
 #undef HAVE_SYS_MMAN_H
 
+/* Define to 1 if you have the <sys/statfs.h> header file. */
+#undef HAVE_SYS_STATFS_H
+
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
+/* Define to 1 if you have the <sys/vfs.h> header file. */
+#undef HAVE_SYS_VFS_H
+
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
@@ -107,6 +113,9 @@ 
 /* The size of `short', as computed by sizeof. */
 #undef SIZEOF_SHORT
 
+/* The size of `struct statfs64', as computed by sizeof. */
+#undef SIZEOF_STRUCT_STATFS64
+
 /* The size of `void *', as computed by sizeof. */
 #undef SIZEOF_VOID_P
 
diff --git a/libsanitizer/configure b/libsanitizer/configure
index 5e4840f..c636212 100755
--- a/libsanitizer/configure
+++ b/libsanitizer/configure
@@ -15463,6 +15463,75 @@  _ACEOF
 
 
 
+for ac_header in sys/statfs.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "sys/statfs.h" "ac_cv_header_sys_statfs_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_statfs_h" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYS_STATFS_H 1
+_ACEOF
+
+fi
+
+done
+
+if test "$ac_cv_header_sys_statfs_h" = "no"; then
+  for ac_header in sys/vfs.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "sys/vfs.h" "ac_cv_header_sys_vfs_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_vfs_h" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYS_VFS_H 1
+_ACEOF
+
+fi
+
+done
+
+fi
+# The cast to long int works around a bug in the HP C Compiler
+# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
+# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
+# This bug is HP SR number 8606223364.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of struct statfs64" >&5
+$as_echo_n "checking size of struct statfs64... " >&6; }
+if test "${ac_cv_sizeof_struct_statfs64+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (struct statfs64))" "ac_cv_sizeof_struct_statfs64"        "
+#ifdef HAVE_SYS_STATFS_H
+# include <sys/statfs.h>
+#endif
+#ifdef HAVE_SYS_VFS_H
+# include <sys/vfs.h>
+#endif
+
+"; then :
+
+else
+  if test "$ac_cv_type_struct_statfs64" = yes; then
+     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+{ as_fn_set_status 77
+as_fn_error "cannot compute sizeof (struct statfs64)
+See \`config.log' for more details." "$LINENO" 5; }; }
+   else
+     ac_cv_sizeof_struct_statfs64=0
+   fi
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_struct_statfs64" >&5
+$as_echo "$ac_cv_sizeof_struct_statfs64" >&6; }
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define SIZEOF_STRUCT_STATFS64 $ac_cv_sizeof_struct_statfs64
+_ACEOF
+
+
+
 if test "${multilib}" = "yes"; then
   multilib_arg="--enable-multilib"
 else
diff --git a/libsanitizer/configure.ac b/libsanitizer/configure.ac
index e672131..746c216 100644
--- a/libsanitizer/configure.ac
+++ b/libsanitizer/configure.ac
@@ -78,6 +78,21 @@  AC_SUBST(enable_static)
 
 AC_CHECK_SIZEOF([void *])
 
+dnl Careful, this breaks on glibc for e.g. dirent.d_ino being 64bit
+dnl AC_SYS_LARGEFILE
+AC_CHECK_HEADERS(sys/statfs.h)
+if test "$ac_cv_header_sys_statfs_h" = "no"; then
+  AC_CHECK_HEADERS(sys/vfs.h)
+fi
+AC_CHECK_SIZEOF([struct statfs64],[],[
+#ifdef HAVE_SYS_STATFS_H
+# include <sys/statfs.h>
+#endif
+#ifdef HAVE_SYS_VFS_H
+# include <sys/vfs.h>
+#endif
+])
+
 if test "${multilib}" = "yes"; then
   multilib_arg="--enable-multilib"
 else
diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_interceptors.h b/libsanitizer/sanitizer_common/sanitizer_platform_interceptors.h
index f37d84b..b9ebd5c 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_interceptors.h
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_interceptors.h
@@ -137,7 +137,9 @@ 
 # define SANITIZER_INTERCEPT_GETMNTENT_R SI_LINUX_NOT_ANDROID
 # define SANITIZER_INTERCEPT_STATFS SI_NOT_WINDOWS
 # define SANITIZER_INTERCEPT_STATFS64 \
-    (SI_MAC && !SI_IOS) || SI_LINUX_NOT_ANDROID
+    SIZEOF_STRUCT_STATFS64 && ( \
+      (SI_MAC && !SI_IOS) || SI_LINUX_NOT_ANDROID \
+    )
 # define SANITIZER_INTERCEPT_STATVFS SI_LINUX_NOT_ANDROID
 # define SANITIZER_INTERCEPT_STATVFS64 SI_LINUX_NOT_ANDROID
 # define SANITIZER_INTERCEPT_INITGROUPS SI_NOT_WINDOWS
diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc b/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc
index bc37df0..637ac1d 100644
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cc
@@ -59,7 +59,9 @@ 
 #endif
 
 namespace __sanitizer {
+#if SANITIZER_INTERCEPT_STATFS64
   unsigned struct_statfs64_sz = sizeof(struct statfs64);
+#endif
 }  // namespace __sanitizer
 
 #if !defined(__powerpc64__) && !defined(__x86_64__)