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| author | Bruno Haible <bruno@clisp.org> | 2020-08-09 12:36:37 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2020-08-09 12:36:37 +0200 |
| commit | d6dabe8eece3a9c1269dc1c084531ce447c7a42e (patch) | |
| tree | 680728f83bce2fe2defc97f294010f86f27a36ac /lib/math.in.h | |
| parent | a3696e42ca6813851543aa1eb43abcf37c2f31e6 (diff) | |
| download | gnulib-d6dabe8eece3a9c1269dc1c084531ce447c7a42e.tar.gz | |
Use __builtin_signbit* with clang.
* lib/math.in.h (signbit): Use __builtin_signbit{,f,l} also on clang.
* m4/signbit.m4 (gl_SIGNBIT): Use __builtin_signbit{,f,l} also on clang.
Set REPLACE_SIGNBIT_USING_BUILTINS, not REPLACE_SIGNBIT_USING_GCC.
* m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize
REPLACE_SIGNBIT_USING_BUILTINS, not REPLACE_SIGNBIT_USING_GCC.
* modules/math (Makefile.am): Substitute REPLACE_SIGNBIT_USING_BUILTINS,
not REPLACE_SIGNBIT_USING_GCC.
Diffstat (limited to 'lib/math.in.h')
| -rw-r--r-- | lib/math.in.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/math.in.h b/lib/math.in.h index 10514f1735..4654a46a79 100644 --- a/lib/math.in.h +++ b/lib/math.in.h @@ -2446,10 +2446,10 @@ _GL_WARN_REAL_FLOATING_DECL (isnan); #if @GNULIB_SIGNBIT@ -# if (@REPLACE_SIGNBIT_USING_GCC@ \ +# if (@REPLACE_SIGNBIT_USING_BUILTINS@ \ && (!defined __cplusplus || __cplusplus < 201103)) # undef signbit - /* GCC 4.0 and newer provides three built-ins for signbit. */ + /* GCC >= 4.0 and clang provide three built-ins for signbit. */ # define signbit(x) \ (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \ sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \ |