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| author | Joseph Myers <joseph@codesourcery.com> | 2022-09-15 20:10:42 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2022-09-15 20:10:42 +0000 |
| commit | 6248f4ff67502c88d92f55fa5ea5996937220e5c (patch) | |
| tree | a8eb0e45a5b071b13ec6e6c41ec8f2fa74e95358 /gcc/ginclude | |
| parent | ecbdfa8b314e2c17da17511b86371f552bffd441 (diff) | |
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float.h: Do not define INFINITY for C2x when infinities not supported
C2x has changed the rules for defining INFINITY in <float.h> so it is
no longer defined when float does not support infinities, instead of
being defined to an expression that overflows at translation time.
Thus, make the definition conditional on __FLT_HAS_INFINITY__ (this is
already inside a C2x-conditional part of <float.h>, because previous C
standard versions only had this macro in <math.h>).
Bootstrapped with no regressions for x86_64-pc-linux-gnu. Also did a
spot test of the case of no infinities supported by building cc1 for
vax-netbsdelf and testing compiling the new c2x-float-11.c test with
it.
gcc/
* ginclude/float.h (INFINITY): Define only if
[__FLT_HAS_INFINITY__].
gcc/testsuite/
* gcc.dg/c2x-float-2.c: Require inff effective-target.
* gcc.dg/c2x-float-11.c: New test.
Diffstat (limited to 'gcc/ginclude')
| -rw-r--r-- | gcc/ginclude/float.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/ginclude/float.h b/gcc/ginclude/float.h index 9d368c4..afe4a71 100644 --- a/gcc/ginclude/float.h +++ b/gcc/ginclude/float.h @@ -257,9 +257,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #define DBL_IS_IEC_60559 __DBL_IS_IEC_60559__ #define LDBL_IS_IEC_60559 __LDBL_IS_IEC_60559__ -/* Infinity in type float, or overflow if infinity not supported. */ +/* Infinity in type float; not defined if infinity not supported. */ +#if __FLT_HAS_INFINITY__ #undef INFINITY #define INFINITY (__builtin_inff ()) +#endif /* Quiet NaN, if supported for float. */ #if __FLT_HAS_QUIET_NAN__ |