[linux] statically link the C++ standard library

Most of the STL is header-only anyway, and statically linking it only has a small overhead. On the other hand, it allows us to build more portable executables.

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.4)
 project(mbgl LANGUAGES CXX C)
 set(CMAKE_CXX_STANDARD 14)
 
-option(WITH_CXX11ABI "Use cxx11abi mason packages" OFF)
+option(WITH_CXX11ABI "Use the C++11 ABI" OFF)
 option(WITH_COVERAGE "Enable coverage reports" OFF)
 option(WITH_OSMESA   "Use OSMesa headless backend" OFF)
 option(WITH_EGL      "Use EGL backend" OFF)

platform/linux/config.cmake

@@ -99,6 +99,14 @@ macro(mbgl_platform_core)
     target_link_libraries(mbgl-core
         PUBLIC -lz
     )
+
+    if(WITH_CXX11ABI)
+        # Statically link libstdc++ when we're using the new STL ABI
+        target_link_libraries(mbgl-core
+            PUBLIC -static-libstdc++
+            PUBLIC -Wl,-Bsymbolic-functions
+        )
+    endif()
 endmacro()