diff options
| author | Aaron Lindsay <alindsay@codeaurora.org> | 2016-07-14 15:38:14 -0400 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-07-29 15:21:43 +0100 |
| commit | 71fcd8eb6883605707309ad7921d43c8c02a938a (patch) | |
| tree | bc9fb80a8781644c417af00c04307abebe1f560e | |
| parent | cf4b61d5819da0b307502527c01d935bf07c9b38 (diff) | |
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>
| -rwxr-xr-x | configure | 17 |
1 files changed, 10 insertions, 7 deletions
@@ -1788,7 +1788,9 @@ fi ########################################## # 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 @@ static void *bar_ifunc(void) {return (void*) bar;} 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 ######################################### |