Merge pull request #1733 from scribam/cmake-openmp

cmake: Rework OpenMP integration

Author: skmp

CMakeLists.txt

@@ -291,6 +291,13 @@ if(${HOST_OS} EQUAL ${OS_LINUX})
     message(FATAL_ERROR "EGL or GLX required")
   endif()
 
+  find_package(OpenMP)
+  if(OpenMP_FOUND)
+    target_link_libraries(${TNAME} OpenMP::OpenMP_CXX)
+  else()
+    target_compile_definitions(${TNAME} PUBLIC TARGET_NO_OPENMP)
+  endif()
+
   find_package(PkgConfig)
   if(PKG_CONFIG_FOUND)
     pkg_check_modules(AO ao)

reicast/cmake/config.cmake

@@ -290,10 +290,6 @@ elseif ((${BUILD_COMPILER} EQUAL ${COMPILER_GCC}) OR
 
   if((${HOST_CPU} EQUAL ${CPU_X86}) OR (${HOST_CPU} EQUAL ${CPU_X64}))
     set(_C_FLAGS "${_C_FLAGS} -msse4")
-    
-    if(NOT CMAKE_HOST_APPLE)
-      set(_C_FLAGS "${_C_FLAGS} -fopenmp")
-    endif()
   endif() # X86 family