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mesa: Remove C++11 narrowing warnings

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Add -Wno-narrowing to CXXFLAGS for gcc.

It is safe to add this flag even for versions of gcc that don't recognize
it.  From the GCC Manual [1]: "[GCC] allows the use of new -Wno- options
with old compilers".

This removes warnings of the form
    warning: narrowing conversion of X from 'int' to 'float' inside { } is
    ill-formed in C++11 [-Wnarrowing]
in ff_fragment_shader.cpp and gen6_blorp.cpp of the form.  When building
i965, I observed no other difference in the build output.

[1] http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>
This commit is contained in:
Chad Versace 2012-08-09 12:59:22 -07:00
parent f7af4beae5
commit 9f5a5d541d
1 changed files with 3 additions and 0 deletions
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configure.ac
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@ -228,6 +228,9 @@ if test "x$GXX" = xyes; then
# gcc's builtin memcmp is slower than glibc's # gcc's builtin memcmp is slower than glibc's
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052
CXXFLAGS="$CXXFLAGS -fno-builtin-memcmp" CXXFLAGS="$CXXFLAGS -fno-builtin-memcmp"
# Silence C++11 warnings that we don't care about.
CXXFLAGS="$CXXFLAGS -Wno-narrowing"
fi fi
dnl even if the compiler appears to support it, using visibility attributes isn't dnl even if the compiler appears to support it, using visibility attributes isn't