From c06929083beed934efbf185c7781a94cf2d2fd84 Mon Sep 17 00:00:00 2001
From: Jean Pierre Cimalando <jp-dev@inbox.ru>
Date: Wed, 31 Mar 2021 18:31:29 +0200
Subject: [PATCH] Process the openMP flags before using as compile options

---
 cmake/SfizzDeps.cmake | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/cmake/SfizzDeps.cmake b/cmake/SfizzDeps.cmake
index e6f07c1c..b167bcb5 100644
--- a/cmake/SfizzDeps.cmake
+++ b/cmake/SfizzDeps.cmake
@@ -6,9 +6,19 @@ find_package(OpenMP)
 if(OPENMP_FOUND)
     add_library(sfizz_openmp INTERFACE)
     add_library(sfizz::openmp ALIAS sfizz_openmp)
+
+    # OpenMP flags are provided as a space-separated string, we need a list
+    if(CMAKE_HOST_WIN32)
+        separate_arguments(SFIZZ_OpenMP_C_OPTIONS WINDOWS_COMMAND "${OpenMP_C_FLAGS}")
+        separate_arguments(SFIZZ_OpenMP_CXX_OPTIONS WINDOWS_COMMAND "${OpenMP_CXX_FLAGS}")
+    else()
+        separate_arguments(SFIZZ_OpenMP_C_OPTIONS UNIX_COMMAND "${OpenMP_C_FLAGS}")
+        separate_arguments(SFIZZ_OpenMP_CXX_OPTIONS UNIX_COMMAND "${OpenMP_CXX_FLAGS}")
+    endif()
+
     target_compile_options(sfizz_openmp INTERFACE
-        $<$<COMPILE_LANGUAGE:C>:${OpenMP_C_FLAGS}>
-        $<$<COMPILE_LANGUAGE:CXX>:${OpenMP_CXX_FLAGS}>)
+        $<$<COMPILE_LANGUAGE:C>:${SFIZZ_OpenMP_C_OPTIONS}>
+        $<$<COMPILE_LANGUAGE:CXX>:${SFIZZ_OpenMP_CXX_OPTIONS}>)
 endif()
 
 # Find macOS system libraries