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build: add -Wexpansion-to-defined

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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 <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-07-11 10:08:55 +02:00
parent 49bcce4b9c
commit b98fcfd884
1 changed files with 1 additions and 1 deletions
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2
configure vendored
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@ -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