diff options
Diffstat (limited to 'sysdeps/s390/configure')
| -rw-r--r-- | sysdeps/s390/configure | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sysdeps/s390/configure b/sysdeps/s390/configure index c2d05f7..6948cc2 100644 --- a/sysdeps/s390/configure +++ b/sysdeps/s390/configure @@ -68,5 +68,41 @@ if test $ac_verc_fail = yes; then fi + +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_tbegin" >&5 +$as_echo_n "checking for __builtin_tbegin... " >&6; } +if ${libc_cv_gcc_builtin_tbegin+:} false; then : + $as_echo_n "(cached) " >&6 +else + cat > conftest.c <<\EOF +#include <htmintrin.h> +void testtransaction () +{ + if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED) + { + __builtin_tend (); + } +} +EOF +if { ac_try='${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; } ; +then + libc_cv_gcc_builtin_tbegin=yes +else + libc_cv_gcc_builtin_tbegin=no +fi +rm -f conftest* +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_builtin_tbegin" >&5 +$as_echo "$libc_cv_gcc_builtin_tbegin" >&6; } + +if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then + critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390." +fi + test -n "$critic_missing" && as_fn_error $? " *** $critic_missing" "$LINENO" 5 |