From 00b7fc12e266b510448a40aaec561f8556221bfa Mon Sep 17 00:00:00 2001
From: Vassil Vassilev <v.g.vassilev@gmail.com>
Date: Mon, 12 Oct 2020 09:44:03 +0000
Subject: [PATCH] Properly add the compile definitions coming from ROOT.

That will help us when creating C libraries.
---
 CMakeLists.txt | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d82b032f..627fae211 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,7 +54,14 @@ include(PytestBenchmark)
 
 #---Add ROOT include direcories and used compilation flags
 include_directories(${ROOT_INCLUDE_DIRS})
-add_definitions(${ROOT_CXX_FLAGS})
+string(REPLACE " " ";" ROOT_C_FLAGS_LIST ${ROOT_C_FLAGS})
+string(REPLACE " " ";" ROOT_CXX_FLAGS_LIST ${ROOT_CXX_FLAGS})
+foreach(C_COMPILE_FLAG ${ROOT_C_FLAGS_LIST})
+  add_compile_options($<$<COMPILE_LANGUAGE:C>:${C_COMPILE_FLAG}>)
+endforeach()
+foreach(CXX_COMPILE_FLAG ${ROOT_CXX_FLAGS_LIST})
+  add_compile_options($<$<COMPILE_LANGUAGE:CXX>:${CXX_COMPILE_FLAG}>)
+endforeach()
 
 #---Include rootbench options
 include(RootBenchOptions)