Commit c075a723 authored Aug 09, 2012 by Blue Swirl

configure: fix double check tests with Clang



Configuring with Clang compiler with -Werror would not work after
improved checks:
/tmp/qemu-conf--25992-.c:4:32: error: self-comparison always evaluates
to true [-Werror,-Wtautological-compare]
int main(void) { return preadv == preadv; }
/tmp/qemu-conf--25992-.c:13:26: error: self-comparison always
evaluates to true [-Werror,-Wtautological-compare]
    return epoll_create1 == epoll_create1;
/tmp/qemu-conf--25992-.c:3:13: error: explicitly assigning a variable
of type 'char **' to itself [-Werror,-Wself-assign]
    environ = environ;

Avoid the errors by adjusting the tests.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

parent 8dc38a78

configure

+3 −3

Original line number	Diff line number	Diff line
		@@ -2256,7 +2256,7 @@ cat > $TMPC <<EOF
		#include <sys/types.h>
		#include <sys/uio.h>
		#include <unistd.h>
		int main(void) { return preadv == preadv; }
		int main(void) { return preadv(0, 0, 0, 0); }
		EOF
		preadv=no
		if compile_prog "" "" ; then
		@@ -2552,7 +2552,7 @@ int main(void)
		* warning but not an error, and will proceed to fail the
		* qemu compile where we compile with -Werror.)
		*/
		return epoll_create1 == epoll_create1;
		return (int)(uintptr_t)&epoll_create1;
		}
		EOF
		if compile_prog "" "" ; then
		@@ -2945,7 +2945,7 @@ has_environ=no
		cat > $TMPC << EOF
		#include <unistd.h>
		int main(void) {
		environ = environ;
		environ = 0;
		return 0;
		}
		EOF