CMake/Source/Checks/cm_c11_thread_local.c

_Thread_local int i = 42;
int main(void) { return 0; }
Avoid using C11 to build CMake if _Thread_local support is broken Support for C11's _Thread_local was introduced in GCC in the 4.9 series, even though we make the C11 compiler flags available in CMake with GCC >= 4.6. FreeBSD's runetype.h uses _Thread_local, which causes CMake's own build to fail when using GCC < 4.9 and -std=gnu11: /usr/include/runetype.h:92:22: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'const' extern _Thread_local const _RuneLocale *_ThreadRuneLocale; Add a test for _Thread_local support and only build CMake itself with C11 support if it works. Bug: http://www.cmake.org/Bug/view.php?id=15741 2015-09-15 17:31:12 +03:00			`_Thread_local int i = 42;`
			`int main(void) { return 0; }`