diff options
Diffstat (limited to 'autoconf')
-rw-r--r-- | autoconf/configure.ac | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/autoconf/configure.ac b/autoconf/configure.ac index 56853e96bf..7f625d4bed 100644 --- a/autoconf/configure.ac +++ b/autoconf/configure.ac @@ -372,6 +372,7 @@ case "$enableval" in default) AC_SUBST(ENABLE_THREADS,[1]) ;; *) AC_MSG_ERROR([Invalid setting for --enable-threads. Use "yes" or "no"]) ;; esac +AC_DEFINE_UNQUOTED([ENABLE_THREADS],$ENABLE_THREADS,[Define if threads enabled]) dnl Allow building without position independent code AC_ARG_ENABLE(pic, @@ -897,24 +898,22 @@ if test "$llvm_cv_platform_type" = "Unix" ; then fi dnl atomic builtins are required for threading support. -if test "$ENABLE_THREADS" -eq 1 ; then - AC_MSG_CHECKING(for GCC atomic builtins) - AC_LINK_IFELSE( - AC_LANG_SOURCE( - [[int main() { - volatile unsigned long val = 1; - __sync_synchronize(); - __sync_val_compare_and_swap(&val, 1, 0); - return 0; - } - ]]), - AC_MSG_RESULT(yes), - AC_MSG_RESULT(no) - AC_SUBST(ENABLE_THREADS, [0]) - AC_MSG_WARN([Threading support disabled because atomic builtins are missing])) -fi +AC_MSG_CHECKING(for GCC atomic builtins) +AC_LINK_IFELSE( + AC_LANG_SOURCE( + [[int main() { + volatile unsigned long val = 1; + __sync_synchronize(); + __sync_val_compare_and_swap(&val, 1, 0); + return 0; + } + ]]), + AC_MSG_RESULT(yes) + AC_DEFINE(LLVM_MULTITHREADED, 1, Build multithreading support into LLVM), + AC_MSG_RESULT(no) + AC_DEFINE(LLVM_MULTITHREADED, 0, Build multithreading support into LLVM) + AC_MSG_WARN([LLVM will be built thread-unsafe because atomic builtins are missing])) -AC_DEFINE_UNQUOTED([ENABLE_THREADS],$ENABLE_THREADS,[Define if threads enabled]) dnl===-----------------------------------------------------------------------=== dnl=== |