avx2 configure: Disable if static build
This avoids a segfault like the following for at least some 4.8 versions
of gcc when configured with --static if avx2 instructions are also
enabled:
Program received signal SIGSEGV, Segmentation fault.
buffer_find_nonzero_offset_ifunc () at ./util/cutils.c:333
333 {
(gdb) bt
#0 buffer_find_nonzero_offset_ifunc () at ./util/cutils.c:333
#1 0x0000000000939c58 in __libc_start_main ()
#2 0x0000000000419337 in _start ()
Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/configure b/configure
index 879324b..f57fcc6 100755
--- a/configure
+++ b/configure
@@ -1788,7 +1788,9 @@
##########################################
# avx2 optimization requirement check
-cat > $TMPC << EOF
+
+if test "$static" = "no" ; then
+ cat > $TMPC << EOF
#pragma GCC push_options
#pragma GCC target("avx2")
#include <cpuid.h>
@@ -1801,12 +1803,13 @@
int foo(void *a) __attribute__((ifunc("bar_ifunc")));
int main(int argc, char *argv[]) { return foo(argv[0]);}
EOF
-if compile_object "" ; then
- if has readelf; then
- if readelf --syms $TMPO 2>/dev/null |grep -q "IFUNC.*foo"; then
- avx2_opt="yes"
- fi
- fi
+ if compile_object "" ; then
+ if has readelf; then
+ if readelf --syms $TMPO 2>/dev/null |grep -q "IFUNC.*foo"; then
+ avx2_opt="yes"
+ fi
+ fi
+ fi
fi
#########################################
