This warning is included in -Wall by clang, but not by GCC (which only enables it for -Wextra). Include it in the list of warnings we enable to minimize the differences between the compilers:
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- configure | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/configure b/configure index 806658c98b..bd1769d4d8 100755 --- a/configure +++ b/configure @@ -1583,7 +1583,7 @@ gcc_flags="-Wold-style-declaration -Wold-style-definition -Wtype-limits" gcc_flags="-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers $gcc_flags" gcc_flags="-Wno-missing-include-dirs -Wempty-body -Wnested-externs $gcc_flags" gcc_flags="-Wendif-labels -Wno-shift-negative-value $gcc_flags" -gcc_flags="-Wno-initializer-overrides $gcc_flags" +gcc_flags="-Wno-initializer-overrides -Wexpansion-to-defined $gcc_flags" gcc_flags="-Wno-string-plus-int $gcc_flags" # Note that we do not add -Werror to gcc_flags here, because that would # enable it for all configure tests. If a configure test failed due -- 2.13.0
