From 6001c5236ba2a70fc23be6f40bc7e62d7fcf832a Mon Sep 17 00:00:00 2001
From: Andrew D Smith <andrewds@usc.edu>
Date: Sun, 2 Oct 2022 17:47:24 -0700
Subject: [PATCH] configure.ac: checking that OpenMP is not supported directly
 by the compiler before searching for separate preprocessor and library to
 enable it.

---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 242c95d..c42d236 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,12 +35,13 @@ AC_CONFIG_SUBDIRS([src/smithlab_cpp])
 
 dnl OpenMP happens here
 AC_OPENMP([C++])
+AS_VAR_IF(OPENMP_CXXFLAGS, [], [
 dnl check for the OpenMP library; can't be later
 AC_SEARCH_LIBS([omp_get_num_threads], [gomp omp], [],
                [AC_MSG_FAILURE([OpenMP library not found])])
 dnl now we get setup for the right OpenMP flags
 ADS_OPENMP([], [AC_MSG_FAILURE([OpenMP must be installed to build abismal])])
-dnl end of OpenMP stuff
+])dnl end of OpenMP stuff
 
 dnl check for the Zlib library
 AC_CHECK_LIB([z], [zlibVersion], [],