From 17dcb7a28131eae0113f00c744c19087f5f69d3b Mon Sep 17 00:00:00 2001
From: Michael Bell <moke.byll@gmail.com>
Date: Tue, 25 May 2021 21:54:31 +0100
Subject: [PATCH] Include -D_GLIBCXX_USE_CXX11_ABI=0 in pkg-config flags

Ensure that any program using libosrm as a dependency builds against
the same libstdc++ ABI. This is needed as Mason dependencies are
still built against the old ABI.
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9aeb1c4b7..265d27d64 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -514,7 +514,7 @@ if(ENABLE_MASON)
   set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${LINKER_FLAGS}")
 
   # current mason packages target -D_GLIBCXX_USE_CXX11_ABI=0
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_GLIBCXX_USE_CXX11_ABI=0")
+  add_dependency_defines(-D_GLIBCXX_USE_CXX11_ABI=0)
 
   # note: we avoid calling find_package(Osmium ...) here to ensure that the
   # expat and bzip2 are used from mason rather than the system