From 058d9e0da3eafb04f6b1fa8a05a3bb9bfc7bc989 Mon Sep 17 00:00:00 2001
From: Axel Isouard <axel@isouard.fr>
Date: Thu, 9 Mar 2017 20:40:23 +0100
Subject: [PATCH] Add GN_EXTRA_ARGS config variable

---
 CMakeModules/Options.cmake | 1 +
 Targets/CMakeLists.txt     | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/CMakeModules/Options.cmake b/CMakeModules/Options.cmake
index 10e6889..bfe5d15 100644
--- a/CMakeModules/Options.cmake
+++ b/CMakeModules/Options.cmake
@@ -2,6 +2,7 @@
 # Options, flags
 option(BUILD_TESTS "Build test binaries" OFF)
 set(NINJA_ARGS "" CACHE STRING "Ninja arguments to pass before compiling WebRTC")
+set(GN_EXTRA_ARGS "" CACHE STRING "Extra gn gen arguments to pass before generating build files")
 option(BUILD_SHARED_LIB "Build WebRTC as a shared library" OFF)
 set(WEBRTC_REVISION "" CACHE STRING "WebRTC commit hash to checkout")
 set(WEBRTC_BRANCH_HEAD "${LIBWEBRTC_WEBRTC_HEAD}" CACHE STRING "WebRTC branch head to checkout")
diff --git a/Targets/CMakeLists.txt b/Targets/CMakeLists.txt
index 86768cb..dc71cee 100644
--- a/Targets/CMakeLists.txt
+++ b/Targets/CMakeLists.txt
@@ -155,6 +155,8 @@ else (LIBRARY_TYPE STREQUAL STATIC)
   set(_GEN_ARGS ${_GEN_ARGS} is_component_build=true)
 endif (LIBRARY_TYPE STREQUAL STATIC)
 
+set(_GEN_ARGS ${_GEN_ARGS} ${GN_EXTRA_ARGS})
+
 if (WIN32)
   set(_GEN_COMMAND gn gen out/Default --args="${_GEN_ARGS}")
 elseif (UNIX)