Date: Sun, 6 Mar 2011 08:52:23 +0000 (UTC) From: David Schultz <das@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r219325 - stable/8/lib/msun Message-ID: <201103060852.p268qNsj091453@svn.freebsd.org>
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Author: das Date: Sun Mar 6 08:52:23 2011 New Revision: 219325 URL: http://svn.freebsd.org/changeset/base/219325 Log: MFC r216137: Disable gcc's built-in rint() function when compiling s_nearbyint.c. It results in incorrect optimizations that break nearbyint(). Modified: stable/8/lib/msun/Makefile Directory Properties: stable/8/lib/msun/ (props changed) Modified: stable/8/lib/msun/Makefile ============================================================================== --- stable/8/lib/msun/Makefile Sun Mar 6 08:50:15 2011 (r219324) +++ stable/8/lib/msun/Makefile Sun Mar 6 08:52:23 2011 (r219325) @@ -109,6 +109,12 @@ 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
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