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| author | Owen Anderson <resistor@mac.com> | 2009-05-19 22:18:56 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2009-05-19 22:18:56 +0000 |
| commit | a86037084d8c2338c305533807b3213cfdc47a3e (patch) | |
| tree | cedee6e1057dcd871c41a1e150497f264ef4bffa /autoconf | |
| parent | 6aa219a18c59a9bc0b1eeb6eece09cfabaaefabe (diff) | |
| download | llvm-a86037084d8c2338c305533807b3213cfdc47a3e.tar.gz llvm-a86037084d8c2338c305533807b3213cfdc47a3e.tar.bz2 llvm-a86037084d8c2338c305533807b3213cfdc47a3e.tar.xz | |
Split the ENABLE_THREADS #define in two. Now ENABLE_THREADS indicates the ability to run multiple threads at once in the JIT, and requires only
mutex support. LLVM_MULTITHREADED indicates (or will indicate) the ability to run LLVM itself across multiple threads, and requires atomics support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72140 91177308-0d34-0410-b5e6-96231b3b80d8
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=== |