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Partially revert r270964. Don't test for C++11 to define _Thread_local.

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In addition to Clang 3.3, it turns out that GCC 4.7 in Ports also does
not support the _Thread_local keyword. Let's document this in a bit more
detail.

Reported by:	antoine@
This commit is contained in:
Ed Schouten 2014-09-03 06:34:16 +00:00
parent 9152087ea7
commit fef8cac0c4
1 changed files with 6 additions and 1 deletions
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7
sys/sys/cdefs.h
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@ -298,7 +298,12 @@
#endif
#if !__has_extension(c_thread_local)
#if (defined(__cplusplus) && __cplusplus >= 201103L) || \
/*
* XXX: Some compilers (Clang 3.3, GCC 4.7) falsely announce C++11 mode
* without actually supporting the thread_local keyword. Don't check for
* the presence of C++11 when defining _Thread_local.
*/
#if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \
__has_extension(cxx_thread_local)
#define _Thread_local thread_local
#else