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Disable gcc's built-in rint() function when compiling s_nearbyint.c.

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It results in incorrect optimizations that break nearbyint().

PR:		143358
Reviewed by:	bde
This commit is contained in:
das 2010-12-03 00:05:49 +00:00
parent dc1c4b9270
commit c282b1e643
1 changed files with 6 additions and 0 deletions
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6
lib/msun/Makefile
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@ -113,6 +113,12 @@ COMMON_SRCS:= ${COMMON_SRCS:N${i:R}.c}
.endfor
.endif
# Some files need certain gcc built-in functions to be disabled, since gcc's
# model of the functions bogusly assumes -fno-trapping-math.
XRINT_CFLAGS= -fno-builtin-rint -fno-builtin-rintf -fno-builtin-rintl
CFLAGS+= ${XRINT_CFLAGS}
XRINT_CFLAGS:= ${.IMPSRC:M*/s_nearbyint.c:C/^.+$/${XRINT_CFLAGS}/:C/^$//}
SRCS= ${COMMON_SRCS} ${ARCH_SRCS}
INCS= fenv.h math.h