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Add ersatz _Static_assert on older C hosts

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* misc/sys/cdefs.h (_Static_assert): Define a substitute, if on a
pre-C11 C platform that is not known to support _Static_assert.
This commit is contained in:
Paul Eggert 2015-02-05 15:52:20 -08:00
parent f96ec27aa9
commit 3999d26ead
3 changed files with 14 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2015-02-07 Paul Eggert <eggert@cs.ucla.edu>
Add ersatz _Static_assert on older C hosts
* misc/sys/cdefs.h (_Static_assert): Define a substitute, if on a
pre-C11 C platform that is not known to support _Static_assert.
2015-02-07 Richard Braun <rbraun@sceen.net>
* hurd/hurd/signal.h (_hurd_critical_section_lock): Don't unlock

1
assert/assert.h
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@ -113,7 +113,6 @@ __END_DECLS
#if defined __USE_ISOC11 && !defined __cplusplus
/* Static assertion. Requires support in the compiler. */
# undef static_assert
# define static_assert _Static_assert
#endif

8
misc/sys/cdefs.h
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@ -399,6 +399,14 @@
# endif
#endif
#if (!defined _Static_assert && !defined __cplusplus \
&& (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \
&& (!__GNUC_PREREQ (4, 6) || defined __STRICT_ANSI__))
# define _Static_assert(expr, diagnostic) \
extern int (*__Static_assert_function (void)) \
[!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })]
#endif
#include <bits/wordsize.h>
#if defined __LONG_DOUBLE_MATH_OPTIONAL && defined __NO_LONG_DOUBLE_MATH