From 2473c57cc69a844bfc65028ac1fc49a042605a47 Mon Sep 17 00:00:00 2001
From: Jean Pierre Cimalando <jp-dev@inbox.ru>
Date: Sun, 21 Feb 2021 22:34:41 +0100
Subject: [PATCH] Enable use of OpenMP simd pragmas

---
 cmake/SfizzDeps.cmake | 13 +++++++++++++
 common.mk             |  6 ++++++
 2 files changed, 19 insertions(+)

diff --git a/cmake/SfizzDeps.cmake b/cmake/SfizzDeps.cmake
index 79020bcd..864f1225 100644
--- a/cmake/SfizzDeps.cmake
+++ b/cmake/SfizzDeps.cmake
@@ -1,6 +1,16 @@
 # Find system threads
 find_package(Threads REQUIRED)
 
+# Find OpenMP
+find_package(OpenMP)
+if(OPENMP_FOUND)
+    add_library(sfizz_openmp INTERFACE)
+    add_library(sfizz::openmp ALIAS sfizz_openmp)
+    target_compile_options(sfizz_openmp INTERFACE
+        $<$<COMPILE_LANGUAGE:C>:${OpenMP_C_FLAGS}>
+        $<$<COMPILE_LANGUAGE:CXX>:${OpenMP_CXX_FLAGS}>)
+endif()
+
 # Find macOS system libraries
 if(APPLE)
     find_library(APPLE_COREFOUNDATION_LIBRARY "CoreFoundation")
@@ -71,6 +81,9 @@ add_subdirectory("external/st_audiofile" EXCLUDE_FROM_ALL)
 add_library(sfizz_simde INTERFACE)
 add_library(sfizz::simde ALIAS sfizz_simde)
 target_include_directories(sfizz_simde INTERFACE "external/simde")
+if(TARGET sfizz::openmp)
+    target_link_libraries(sfizz_simde INTERFACE sfizz::openmp)
+endif()
 
 # The pugixml library
 add_library(sfizz_pugixml STATIC "src/external/pugixml/src/pugixml.cpp")
diff --git a/common.mk b/common.mk
index 7909df12..ca23cad7 100644
--- a/common.mk
+++ b/common.mk
@@ -364,3 +364,9 @@ SFIZZ_C_FLAGS += -pthread
 SFIZZ_CXX_FLAGS += -pthread
 SFIZZ_LINK_FLAGS += -pthread
 endif
+
+### OpenMP dependency
+
+SFIZZ_C_FLAGS += -fopenmp
+SFIZZ_CXX_FLAGS += -fopenmp
+SFIZZ_LINK_FLAGS += -fopenmp