diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2024-12-15 09:56:34 +0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2024-12-22 12:44:42 +0800 |
| commit | bdc7f4b4e25f49b4e25578d98d58b113d0e961f1 (patch) | |
| tree | f47e1799aaea3e0f20fe5d81c8c6d98d63f0c3f8 /math | |
| parent | 6d9d7865d029e94d1aee24c609f4d222d0620fff (diff) | |
| download | glibc-bdc7f4b4e25f49b4e25578d98d58b113d0e961f1.tar.xz glibc-bdc7f4b4e25f49b4e25578d98d58b113d0e961f1.zip | |
Don't redefine INFINITY nor NAN
Since math/math.h isn't a system header, clang issues errors:
In file included from test-flt-eval-method.c:20:
In file included from ../include/math.h:7:
../math/math.h:91:11: error: 'INFINITY' macro redefined [-Werror,-Wmacro-redefined]
91 | # define INFINITY (__builtin_inff ())
| ^
/usr/bin/../lib/clang/19/include/float.h:173:11: note: previous definition is here
173 | # define INFINITY (__builtin_inff())
| ^
In file included from test-flt-eval-method.c:20:
In file included from ../include/math.h:7:
../math/math.h:98:11: error: 'NAN' macro redefined [-Werror,-Wmacro-redefined]
98 | # define NAN (__builtin_nanf (""))
| ^
/usr/bin/../lib/clang/19/include/float.h:174:11: note: previous definition is here
174 | # define NAN (__builtin_nanf(""))
Don't define INFINITY nor NAN if they are defined.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
Diffstat (limited to 'math')
| -rw-r--r-- | math/math.h | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/math/math.h b/math/math.h index 599ca3ae79..5e085fdf9a 100644 --- a/math/math.h +++ b/math/math.h @@ -87,20 +87,24 @@ __BEGIN_DECLS #ifdef __USE_ISOC99 /* IEEE positive infinity. */ -# if __GNUC_PREREQ (3, 3) -# define INFINITY (__builtin_inff ()) -# else -# define INFINITY HUGE_VALF +# ifndef INFINITY +# if __GNUC_PREREQ (3, 3) +# define INFINITY (__builtin_inff ()) +# else +# define INFINITY HUGE_VALF +# endif # endif /* IEEE Not A Number. */ -# if __GNUC_PREREQ (3, 3) -# define NAN (__builtin_nanf ("")) -# else +# ifndef NAN +# if __GNUC_PREREQ (3, 3) +# define NAN (__builtin_nanf ("")) +# else /* This will raise an "invalid" exception outside static initializers, but is the best that can be done in ISO C while remaining a constant expression. */ -# define NAN (0.0f / 0.0f) +# define NAN (0.0f / 0.0f) +# endif # endif #endif /* __USE_ISOC99 */ |