Author: ed
Date: Sat Apr 27 21:18:34 2013
New Revision: 249995
URL: http://svnweb.freebsd.org/changeset/base/249995
Log:
Enable improved <tgmath.h> for Clang even when not using C11.
By using __has_extension(c_generic_selections), we can explicitly test
whether we're dealing with a version of Clang that supports _Generic().
That way we can use the improved <tgmath.h> code, even when not using
-std=c11. This massively reduces the compilation time when invoking
these functions.
Modified:
head/include/tgmath.h
Modified: head/include/tgmath.h
==============================================================================
--- head/include/tgmath.h Sat Apr 27 20:24:30 2013 (r249994)
+++ head/include/tgmath.h Sat Apr 27 21:18:34 2013 (r249995)
@@ -60,7 +60,8 @@
* compilers use an inefficient yet reliable version.
*/
-#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
+ __has_extension(c_generic_selections)
#define __tg_generic(x, cfnl, cfn, cfnf, fnl, fn, fnf)
\
_Generic(x, \
long double _Complex: cfnl, \
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