From 7a1344bfcb54cf32cf66a006d5ddf0ddfa1ea9ef Mon Sep 17 00:00:00 2001
From: Matthias Hochsteger <mhochsteger@cerbsim.com>
Date: Thu, 1 Oct 2020 13:35:53 +0200
Subject: [PATCH] cmake variable NG_COMPILE_FLAGS to set additional compile
 options

---
 CMakeLists.txt             | 2 ++
 cmake/SuperBuild.cmake     | 1 +
 libsrc/core/CMakeLists.txt | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c756c441..7916e6ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -34,6 +34,8 @@ option( BUILD_FOR_CONDA "Link python libraries only to executables" OFF)
 
 option( USE_SUPERBUILD       "use ccache" ON)
 
+set(NG_COMPILE_FLAGS "" CACHE STRING "Additional compile flags")
+
 set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake_modules")
 
 if(APPLE)
diff --git a/cmake/SuperBuild.cmake b/cmake/SuperBuild.cmake
index e28c034b..37709768 100644
--- a/cmake/SuperBuild.cmake
+++ b/cmake/SuperBuild.cmake
@@ -145,6 +145,7 @@ set_vars( NETGEN_CMAKE_ARGS
   CHECK_RANGE
   BUILD_STUB_FILES
   BUILD_FOR_CONDA
+  NG_COMPILE_FLAGS
   )
 
 # propagate all variables set on the command line using cmake -DFOO=BAR
diff --git a/libsrc/core/CMakeLists.txt b/libsrc/core/CMakeLists.txt
index a2873ed9..8329a195 100644
--- a/libsrc/core/CMakeLists.txt
+++ b/libsrc/core/CMakeLists.txt
@@ -14,6 +14,8 @@ add_library(ngcore SHARED
   version.cpp
   )
 
+target_compile_options(ngcore PUBLIC "${NG_COMPILE_FLAGS}")
+
 # Pybind11 2.3 Issue https://github.com/pybind/pybind11/issues/1604
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   target_compile_options(ngcore PUBLIC -fsized-deallocation -faligned-allocation)