Correct POSIX version check to determine presence of gmtime_r()
Recent versions of POSIX move gmtime_r to the base.
diff --git a/library/platform_util.c b/library/platform_util.c
index ddb56ed..7e82293 100644
--- a/library/platform_util.c
+++ b/library/platform_util.c
@@ -81,7 +81,10 @@
defined(__unix) || defined(__unix__) || (defined(__APPLE__) && \
defined(__MACH__)))
#include <unistd.h>
-#if !defined(_POSIX_VERSION) || _POSIX_C_SOURCE > _POSIX_THREAD_SAFE_FUNCTIONS
+
+#if !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \
+ ( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \
+ _POSIX_THREAD_SAFE_FUNCTIONS >= 20112L ) )
/*
* This is a convenience shorthand macro to avoid checking the long
* preprocessor conditions above. Ideally, we could expose this macro in
@@ -90,7 +93,9 @@
* we keep it private by only defining it in this file
*/
#define PLATFORM_UTIL_USE_GMTIME
-#endif /* !_POSIX_VERSION || _POSIX_C_SOURCE > _POSIX_THREAD_SAFE_FUNCTIONS */
+#endif /* !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \
+ ( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \
+ _POSIX_THREAD_SAFE_FUNCTIONS >= 20112L ) ) */
#endif /* !_WIN32 && (unix || __unix || __unix__ ||
* (__APPLE__ && __MACH__)) */