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(svn r22728) -Codechange: add -Wno-narrowing to cxxflags in order to prevent many useless warnings with GCC 4.7

This commit is contained in:
smatz 2011-08-07 11:18:33 +00:00
parent 6a87848809
commit 6e99c40087
1 changed files with 7 additions and 0 deletions
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7
config.lib
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@ -1299,6 +1299,13 @@ make_compiler_cflags() {
cxxflags="$cxxflags -std=gnu++0x"
fi
if [ $cc_version -ge 47 ]; then
# Disable -Wnarrowing which gives many warnings, such as:
# warning: narrowing conversion of '...' from 'unsigned int' to 'int' inside { } [-Wnarrowing]
# They are valid according to the C++ standard, but useless.
cxxflags="$cxxflags -Wno-narrowing"
fi
if [ "$enable_lto" != "0" ]; then
# GCC 4.5 outputs '%{flto}', GCC 4.6 outputs '%{flto*}'
has_lto=`$1 -dumpspecs | grep '\%{flto'`