From 6248f4ff67502c88d92f55fa5ea5996937220e5c Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Thu, 15 Sep 2022 20:10:42 +0000 Subject: float.h: Do not define INFINITY for C2x when infinities not supported C2x has changed the rules for defining INFINITY in 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 , because previous C standard versions only had this macro in ). 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. --- gcc/ginclude/float.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'gcc/ginclude') 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__ -- cgit v1.1