diff options
| -rwxr-xr-x | Configure | 12 |
1 files changed, 7 insertions, 5 deletions
@@ -10554,7 +10554,7 @@ int main(void) { EOCP set try - if eval $compile; then + if eval $compile && $run ./try; then echo "Your C compiler supports __builtin_choose_expr." val="$define" else @@ -10574,18 +10574,20 @@ case "$d_builtin_expect" in '') echo " " echo "Checking whether your compiler can handle __builtin_expect ..." >&4 - $cat >builtin.c <<'EOCP' + $cat >try.c <<'EOCP' int main(void) { int n = 50; if ( __builtin_expect(n, 0) ) n = 1; + /* Remember shell exit code truth is 0, C truth is non-zero */ + return !(n == 1); } EOCP set try - if eval $compile; then - echo "Your C compiler supports __builtin_choose_expr." + if eval $compile && $run ./try; then + echo "Your C compiler supports __builtin_expect." val="$define" else - echo "Your C compiler doesn't seem to understand __builtin_choose_expr." + echo "Your C compiler doesn't seem to understand __builtin_expect." val="$undef" fi ;; |