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(svn r16424) -Codechange: warn about casting-out 'const' only when using gcc4+, older versions give many useless false positives

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smatz 2009-05-25 19:30:37 +00:00
parent 2832d69272
commit 4f24725986
1 changed files with 12 additions and 9 deletions
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21
config.lib
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@ -1103,7 +1103,7 @@ make_cflags_and_ldflags() {
if [ $cc_version -ge 29 ]; then
CFLAGS="$CFLAGS -Wall -Wno-multichar -Wsign-compare -Wundef"
CFLAGS="$CFLAGS -Wwrite-strings -Wpointer-arith"
CFLAGS="$CFLAGS -Wno-uninitialized -Wcast-qual"
CFLAGS="$CFLAGS -Wno-uninitialized"
CC_CFLAGS="$CC_CFLAGS -Wstrict-prototypes"
fi
@ -1148,19 +1148,22 @@ make_cflags_and_ldflags() {
LIBS="$LIBS -lws2_32 -lwinmm -lgdi32 -ldxguid -lole32"
fi
# GCC 4.0+ complains about that we break strict-aliasing.
# On most places we don't see how to fix it, and it doesn't
# break anything. So disable strict-aliasing to make the
# compiler all happy.
if [ $cc_version -ge 40 ]; then
# GCC 4.0+ complains about that we break strict-aliasing.
# On most places we don't see how to fix it, and it doesn't
# break anything. So disable strict-aliasing to make the
# compiler all happy.
CFLAGS="$CFLAGS -fno-strict-aliasing"
# Warn about casting-out 'const' with regular C-style cast.
# The preferred way is const_cast<>() which doesn't warn.
CFLAGS="$CFLAGS -Wcast-qual"
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 [ $cc_version -ge 42 ]; then
# GCC 4.2+ automatically assumes that signed overflows do
# not occur in signed arithmetics, whereas we are not
# sure that they will not happen. It furthermore complains
# about it's own optimized code in some places.
CFLAGS="$CFLAGS -fno-strict-overflow"
fi
fi