[PULL v2 01/11] build: Silence clang warning on older glib autoptr usage

From: Eric Blake <eblake(a)redhat.com&gt; 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(a)linaro.org&gt; Signed-off-by: Eric Blake <eblake(a)redhat.com&gt; Reviewed-by: John Snow <jsnow(a)redhat.com&gt; Message-id: 20200317175534.196295-1-eblake(a)redhat.com Signed-off-by: John Snow <jsnow(a)redhat.com&gt; --- configure | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/configure b/configure index 06fcd070fb..479336bf6e 100755 --- a/configure +++ b/configure @@ -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 -- 2.21.1