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(svn r10779) -Fix: GCC 4.2 makes (by default for -O2, -O3 and -Os) an assumption that signed integers do not overflow, whereas it is very likely that some of the legacy code does so. It furthermore breaks with the assumed standard (the behaviour is not actually defined in the standard) about the behaviour when signed integers wrap.

This commit is contained in:
rubidium 2007-08-04 00:45:53 +00:00
parent b3bed1eda1
commit 8037a1cc2d
1 changed files with 8 additions and 0 deletions
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8
config.lib
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@ -838,6 +838,14 @@ make_cflags_and_ldflags() {
CFLAGS="$CFLAGS -fno-strict-aliasing"
fi
# GCC 4.2+ automatically assumes that signed overflows do
# not occur in signed arithmetics, whereas we are not
# sure that they will not happen. It furthermore complains
# about it's own optimized code in some places.
if [ $cc_version -ge 42 ]; then
CFLAGS="$CFLAGS -fno-strict-overflow"
fi
if [ "$os" != "CYGWIN" ] && [ "$os" != "FREEBSD" ] && [ "$os" != "OPENBSD" ] && [ "$os" != "MINGW" ] && [ "$os" != "MORPHOS" ] && [ "$os" != "OSX" ] && [ "$os" != "WINCE" ] && [ "$os" != "PSP" ] && [ "$os" != "OS2" ]; then
LIBS="$LIBS -lpthread"
LIBS="$LIBS -lrt"