diff --git a/configure.ac b/configure.ac
index a48ad21..76ea66a 100755
--- a/configure.ac
+++ b/configure.ac
@@ -1268,11 +1268,29 @@
GOMP_LIBS=''
if test "$enable_openmp" != 'no'; then
if test "${GCC}" = "yes"; then
- AC_CHECK_LIB(gomp,GOMP_parallel_start,GOMP_LIBS="-lgomp",,) # gcc
+ # Open64 (passes for GCC but uses different OpenMP implementation)
+ if test "x$GOMP_LIBS" = x ; then
+ if $CC --version 2>&1 | grep Open64 > /dev/null ; then
+ AC_CHECK_LIB(openmp,omp_get_num_procs,GOMP_LIBS="-lopenmp",,)
+ fi
+ fi
+ # GCC
+ if test "x$GOMP_LIBS" = x ; then
+ AC_CHECK_LIB(gomp,GOMP_parallel_start,GOMP_LIBS="-lgomp",,)
+ fi
else
- AC_CHECK_LIB(mtsk,sunw_mp_register_warn,GOMP_LIBS="-lmtsk",,) # solaris cc
- AC_CHECK_LIB(xlsmp,_xlsmpFlush,GOMP_LIBS="-lxlsmp",,) # AIX xlc
- AC_CHECK_LIB(mp,mp_destroy,GOMP_LIBS="-lmp",,) # SGI IRIX 6.5 MIPSpro C/C++
+ # Sun CC
+ if test "x$GOMP_LIBS" = x ; then
+ AC_CHECK_LIB(mtsk,sunw_mp_register_warn,GOMP_LIBS="-lmtsk",,)
+ fi
+ # AIX xlc
+ if test "x$GOMP_LIBS" = x ; then
+ AC_CHECK_LIB(xlsmp,_xlsmpFlush,GOMP_LIBS="-lxlsmp",,)
+ fi
+ # SGI IRIX 6.5 MIPSpro C/C++
+ if test "x$GOMP_LIBS" = x ; then
+ AC_CHECK_LIB(mp,mp_destroy,GOMP_LIBS="-lmp",,)
+ fi
fi
LIBS="$GOMP_LIBS $LIBS"
fi