Author: ed
Date: Tue Jan 17 20:21:31 2012
New Revision: 230277
URL: http://svn.freebsd.org/changeset/base/230277
Log:
Don't expose __generic() when not using C++.
According to the GCC documentation, the constructs used to implement
<tgmath.h> are only available in C mode. They only cause breakage when
used used with g++.
Reported by: tijl
Modified:
head/sys/sys/cdefs.h
Modified: head/sys/sys/cdefs.h
==============================================================================
--- head/sys/sys/cdefs.h Tue Jan 17 19:36:53 2012 (r230276)
+++ head/sys/sys/cdefs.h Tue Jan 17 20:21:31 2012 (r230277)
@@ -260,7 +260,7 @@
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
#define __generic(expr, t, yes, no)
\
_Generic(expr, t: yes, default: no)
-#elif __GNUC_PREREQ__(3, 1)
+#elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus)
#define __generic(expr, t, yes, no)
\
__builtin_choose_expr( \
__builtin_types_compatible_p(__typeof(expr), t), yes, no)
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