diff options
Diffstat (limited to 'libstdc++-v3/acinclude.m4')
| -rw-r--r-- | libstdc++-v3/acinclude.m4 | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index 696e51e3429..90c4e4f6d21 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -1746,23 +1746,18 @@ dnl + Usage: GLIBCXX_ENABLE_PARALLEL dnl AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [ - # NB: libstdc++ may be configured before libgomp: can't check for the actual - # dependencies (omp.h and libgomp). enable_parallel=no; - if test -f $glibcxx_builddir/../libgomp/omp.h; then - enable_parallel=yes; + + # Check to see if OpenMP is explicitly disabled. + AC_MSG_CHECKING([for libgomp support]) + GLIBCXX_ENABLE(libgomp,$1,,[enable code depending on libgomp],[permit yes|no]) + AC_MSG_RESULT([$enable_libgomp]) + if test x$enable_libgomp = xno; then + enable_parallel=no else - AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found]) + enable_parallel=yes fi - # Check to see if it's explicitly disabled. -# GLIBCXX_ENABLE(libgomp,$1,,[enable code depending on libgomp], -# [permit yes|no]) - -# if test x$enable_libgomp = xno; then -# enable_parallel=no -# fi - AC_MSG_CHECKING([for parallel mode support]) AC_MSG_RESULT([$enable_parallel]) GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes) @@ -2224,6 +2219,14 @@ EOF # If still generic, set to mutex. if test $atomicity_dir = "cpu/generic" ; then atomicity_dir=cpu/generic/atomicity_mutex + AC_MSG_WARN([No native atomic operations are provided for this platform.]) + if test $target_thread_file = single; then + AC_MSG_WARN([They cannot be faked when thread support is disabled.]) + AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) + else + AC_MSG_WARN([They will be faked using a mutex.]) + AC_MSG_WARN([Performance of certain classes will degrade as a result.]) + fi fi ]) |