From 8f5ff2156d7238e5f083c876e3aea8d775b655dd Mon Sep 17 00:00:00 2001
From: Kris Thielemans <k.thielemans@ucl.ac.uk>
Date: Thu, 7 Mar 2024 01:01:20 +0000
Subject: [PATCH] only use include_directories if OpenMP dirs non-empty

---
 CMakeLists.txt             | 8 ++++++--
 niftyreg_build_version.txt | 2 +-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c8556616..b2b72dbf 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -172,8 +172,12 @@ if(USE_OPENMP)
      message(STATUS "Found OpenMP")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
-    include_directories("${OpenMP_CXX_INCLUDE_DIRS}")
-    include_directories("${OpenMP_C_INCLUDE_DIRS}")
+    if (OpenMP_CXX_INCLUDE_DIRS)
+      include_directories("${OpenMP_CXX_INCLUDE_DIRS}")
+    endif()
+    if (OpenMP_C_INCLUDE_DIRS)
+      include_directories("${OpenMP_C_INCLUDE_DIRS}")
+    endif()
   endif(NOT OPENMP_FOUND)
 endif(USE_OPENMP)
 #-----------------------------------------------------------------------------
diff --git a/niftyreg_build_version.txt b/niftyreg_build_version.txt
index dd475631..987e7ca9 100644
--- a/niftyreg_build_version.txt
+++ b/niftyreg_build_version.txt
@@ -1 +1 @@
-76
+77