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build: Silence clang warning on older glib autoptr usage

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glib's G_DEFINE_AUTOPTR_CLEANUP_FUNC() macro defines several static
inline functions, often with some of them unused, but prior to 2.57.2
did not mark the functions as such.  As a result, clang (but not gcc)
fails to build with older glib unless -Wno-unused-function is enabled.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20200317175534.196295-1-eblake@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
This commit is contained in:
Eric Blake 2020-03-17 12:55:34 -05:00 committed by John Snow
parent d649689a8e
commit 9bda600b08
1 changed files with 20 additions and 0 deletions
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20
configure vendored
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@ -3851,6 +3851,26 @@ if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then
fi
fi
# Silence clang warnings triggered by glib < 2.57.2
cat > $TMPC << EOF
#include <glib.h>
typedef struct Foo {
int i;
} Foo;
static void foo_free(Foo *f)
{
g_free(f);
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC(Foo, foo_free);
int main(void) { return 0; }
EOF
if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then
if cc_has_warning_flag "-Wno-unused-function"; then
glib_cflags="$glib_cflags -Wno-unused-function"
CFLAGS="$CFLAGS -Wno-unused-function"
fi
fi
#########################################
# zlib check