new file mode 100644
@@ -0,0 +1,73 @@
+From a7f6342120060564a829704cceb843e53e0b34a9 Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Date: Sat, 17 Nov 2012 18:44:16 +0100
+Subject: [PATCH 3/3] Make thread support conditionnal
+
+When libffi is linked against a C library that does not have thread
+support, it is not necessary to use a mutex to protect global
+variables, since the application calling libffi cannot be
+multi-threaded.
+
+Therefore, make the libffi thread support conditionnal: when we're
+building against uClibc with no thread support, don't use the
+pthread_mutex.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ src/closures.c | 12 ++++++++++++
+ 1 file changed, 12 insertions(+)
+
+diff --git a/src/closures.c b/src/closures.c
+index 1b37827..3d151f6 100644
+--- a/src/closures.c
++++ b/src/closures.c
+@@ -70,7 +70,10 @@
+
+ # elif FFI_MMAP_EXEC_WRIT /* !FFI_EXEC_TRAMPOLINE_TABLE */
+
++#if defined(__UCLIBC__) && !defined(__HAS_NO_THREADS__)
+ #define USE_LOCKS 1
++#endif
++
+ #define USE_DL_PREFIX 1
+ #ifdef __GNUC__
+ #ifndef USE_BUILTIN_FFS
+@@ -116,7 +119,10 @@
+ #include <mntent.h>
+ #endif /* HAVE_MNTENT */
+ #include <sys/param.h>
++
++#if defined(__UCLIBC__) && !defined(__HAS_NO_THREADS__)
+ #include <pthread.h>
++#endif
+
+ /* We don't want sys/mman.h to be included after we redefine mmap and
+ dlmunmap. */
+@@ -214,8 +220,10 @@ static int dlmunmap(void *, size_t);
+
+ #if !(defined(X86_WIN32) || defined(X86_WIN64) || defined(__OS2__)) || defined (__CYGWIN__) || defined(__INTERIX)
+
++#if defined(__UCLIBC__) && !defined(__HAS_NO_THREADS__)
+ /* A mutex used to synchronize access to *exec* variables in this file. */
+ static pthread_mutex_t open_temp_exec_file_mutex = PTHREAD_MUTEX_INITIALIZER;
++#endif
+
+ /* A file descriptor of a temporary file from which we'll map
+ executable pages. */
+@@ -473,9 +481,13 @@ dlmmap (void *start, size_t length, int prot,
+
+ if (execsize == 0 || execfd == -1)
+ {
++#if defined(__UCLIBC__) && !defined(__HAS_NO_THREADS__)
+ pthread_mutex_lock (&open_temp_exec_file_mutex);
++#endif
+ ptr = dlmmap_locked (start, length, prot, flags, offset);
++#if defined(__UCLIBC__) && !defined(__HAS_NO_THREADS__)
+ pthread_mutex_unlock (&open_temp_exec_file_mutex);
++#endif
+
+ return ptr;
+ }
+--
+1.7.9.5
+