From d68f00e4d8b061f56d3bd46d5ed1bc51406a4f1a Mon Sep 17 00:00:00 2001
From: Joel Winarske <joel.winarske@gmail.com>
Date: Fri, 16 Mar 2018 12:14:27 -0700
Subject: [PATCH] Do feature test before adding -Bsymbolic-functions, cmake
 part (#889)

---
 CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5ddc15a7c..85709b2e5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -537,7 +537,11 @@ target_link_libraries(harfbuzz-subset harfbuzz ${THIRD_PARTY_LIBS})
 
 if (UNIX OR MINGW)
   # Make symbols link locally
-  link_libraries(-Bsymbolic-functions)
+  include(CheckCXXCompilerFlag)
+  check_cxx_compiler_flag(-Bsymbolic-functions CXX_SUPPORTS_FLAG_BSYMB_FUNCS)
+  if(CXX_SUPPORTS_FLAG_BSYMB_FUNCS)
+    link_libraries(-Bsymbolic-functions)
+  endif()  
 
   if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     # Make sure we don't link to libstdc++