Make openmp optional for virtualfluids cpu.

CMakeLists.txt

@@ -35,6 +35,8 @@ set (VF_ROOT_DIR  ${CMAKE_CURRENT_SOURCE_DIR})
 option(BUILD_VF_CPU "Build VirtualFluids cpu variant" OFF)
 option(BUILD_VF_GPU "Build VirtualFluids gpu variant" OFF)
 
+option(BUILD_USE_OPENMP "Build VirtualFluids with openmp" OFF)
+
 # vf gpu
 option(BUILD_VF_GPU          "Build VirtualFluids GPU"     ON )
 option(BUILD_VF_GKS          "Build VirtualFluids GKS"     OFF )

src/cpu/VirtualFluidsCore/CMakeLists.txt

@@ -27,7 +27,9 @@ vf_add_library(BUILDTYPE static PUBLIC_LINK basics muparser ${CAB_ADDITIONAL_LIN
 
 vf_get_library_name(library_name)
 
-linkOpenMP(${library_name})
+if(BUILD_USE_OPENMP)
+   linkOpenMP(${library_name})
+endif()
 
 target_include_directories(${library_name} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/BoundaryConditions)
 target_include_directories(${library_name} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/Connectors)