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[Qemu-devel] [PATCH v3 1/2] Make avx2 configure test work with -O2

From: Dr. David Alan Gilbert (git)
Subject: [Qemu-devel] [PATCH v3 1/2] Make avx2 configure test work with -O2
Date: Fri, 10 Jun 2016 12:16:17 +0100

From: "Dr. David Alan Gilbert" <address@hidden>

When configured with --extra-cflags=-O2 gcc optimised out the test
and the readelf failed the check leaving avx2 disabled.

Signed-off-by: Dr. David Alan Gilbert <address@hidden>
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 8c2f90b..ffa5b62 100755
--- a/configure
+++ b/configure
@@ -1784,7 +1784,7 @@ fi
 cat > $TMPC << EOF
 static void bar(void) {}
 static void *bar_ifunc(void) {return (void*) bar;}
-static void foo(void) __attribute__((ifunc("bar_ifunc")));
+void foo(void) __attribute__((ifunc("bar_ifunc")));
 int main(void) { foo(); return 0; }
 if compile_prog "-mavx2" "" ; then

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