Merge pull request #4135 from libgit2/ethomson/ancient_gcc_not_threadsafe

Provide error on gcc < 4.1 when THREADSAFE

Merge pull request #4135 from libgit2/ethomson/ancient_gcc_not_threadsafe
Provide error on gcc < 4.1 when THREADSAFE
86201b92 · Carlos Martín Nieto · GitHub · b13f0da1 · aa5ea47f · 86201b92
Commit 86201b92 authored Feb 22, 2017 by Carlos Martín Nieto Committed by GitHub Feb 22, 2017
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src/thread-utils.h
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--- a/src/thread-utils.h
+++ b/src/thread-utils.h
@@ -7,6 +7,12 @@
 #ifndef INCLUDE_thread_utils_h__
 #define INCLUDE_thread_utils_h__

+#if defined(__GNUC__) && defined(GIT_THREADS)
+# if (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1))
+#  error Atomic primitives do not exist on this version of gcc; configure libgit2 with -DTHREADSAFE=OFF
+# endif
+#endif
+
 /* Common operations even if threading has been disabled */
 typedef struct {
 #if defined(GIT_WIN32)