diff --git a/CMakeLists.txt b/CMakeLists.txt
index 244b393..b241a44 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,6 +31,8 @@ endif()
 set(CMAKE_CXX_FLAGS "-Wall")
 set(MINIMAL_GNU "11.0")
 set(MINIMAL_CLANG "13.0")
+set(IS_GNU (${CMAKE_CXX_COMPILER_ID} STREQUAL GNU))
+set(IS_CLANG (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang))
 
 if (NOT MSVC)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
@@ -45,8 +47,14 @@ if(CCACHE_PRESENT)
     set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
 endif(CCACHE_PRESENT)
 
-if ((${CMAKE_CXX_COMPILER_ID} STREQUAL GNU) OR (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang))
-    set(CMAKE_CXX_FLAGS "-flto ${CMAKE_CXX_FLAGS} -pipe -fstack-protector-strong -fstack-clash-protection -funwind-tables -fasynchronous-unwind-tables -fexceptions")
+if (${IS_GNU} OR ${IS_CLANG})
+    if (NOT (MINGW AND ${IS_CLANG})) # llvm-mingw linux packages don't bundle openmp
+        include(FindOpenMP)
+        if (OpenMP_CXX_FOUND)
+            add_definitions(-D_GLIBCXX_PARALLEL)
+        endif()
+    endif()
+    set(CMAKE_CXX_FLAGS "-flto ${OpenMP_CXX_FLAGS} ${CMAKE_CXX_FLAGS} -pipe -fstack-protector-strong -fstack-clash-protection -funwind-tables -fasynchronous-unwind-tables -fexceptions")
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -ffunction-sections -fdata-sections -fmerge-all-constants -ftree-vectorize")
     include(CheckCXXCompilerFlag)
     set(CF_PROTECTION "-fcf-protection")
@@ -56,13 +64,13 @@ if ((${CMAKE_CXX_COMPILER_ID} STREQUAL GNU) OR (${CMAKE_CXX_COMPILER_ID} STREQUA
     endif()
 endif()
 
-if (${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
+if (${IS_GNU})
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_GNU})
         message(FATAL_ERROR "G++ ${MINIMAL_GNU} or higher is required.")
     endif()
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -foptimize-strlen -fsched-pressure -flive-range-shrinkage -fpredictive-commoning -ftree-partial-pre -fira-loop-pressure -ftree-loop-distribution -floop-interchange -fsplit-paths -fgcse-las -fgcse-sm -fipa-pta -fstdarg-opt -fivopts -s")
     set(CMAKE_CXX_FLAGS "-fno-use-linker-plugin -fwhole-program ${CMAKE_CXX_FLAGS}")
-elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
+elseif(${IS_CLANG})
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_CLANG})
         message(FATAL_ERROR "Clang ${MINIMAL_CLANG} or higher is required.")
     endif()