Add used attribute in order to make NEON detection working with -flto.
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@ -219,7 +219,7 @@ AC_MSG_CHECKING(for ARM NEON support in current arch/CFLAGS)
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AC_LINK_IFELSE([
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AC_LANG_PROGRAM([[
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#include <arm_neon.h>
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int32x4_t testfunc(int16_t *a, int16_t *b) {
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int32x4_t __attribute__((used)) testfunc(int16_t *a, int16_t *b) {
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asm volatile ("vmull.s16 q0, d0, d0" : : : "q0");
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return vmull_s16(vld1_s16(a), vld1_s16(b));
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}
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