Pass CMAKE_TOOLCHAIN_FILE to the ExternalProject_Add() CMAKE_ARGS

Author: paroga

CMakeLists.txt

@@ -67,7 +67,7 @@ if (WPCP_BUILD_LIBWEBSOCKETS)
     libwebsockets
     GIT_REPOSITORY git://git.libwebsockets.org/libwebsockets
     GIT_TAG "v2.0.3"
-    CMAKE_ARGS "-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}" "-DCMAKE_C_FLAGS:STRING=${ADDITIONAL_LIBWEBSOCKETS_C_FLAGS}" "-DCMAKE_PREFIX_PATH:PATH=${CMAKE_PREFIX_PATH}" "-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>" "-DLWS_WITHOUT_EXTENSIONS=ON" "-DLWS_WITHOUT_TESTAPPS=ON" "-DLWS_WITH_SSL:BOOL=ON"
+    CMAKE_ARGS "-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}" "-DCMAKE_TOOLCHAIN_FILE:PATH=${CMAKE_TOOLCHAIN_FILE}" "-DCMAKE_C_FLAGS:STRING=${ADDITIONAL_LIBWEBSOCKETS_C_FLAGS}" "-DCMAKE_PREFIX_PATH:PATH=${CMAKE_PREFIX_PATH}" "-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>" "-DLWS_WITHOUT_EXTENSIONS=ON" "-DLWS_WITHOUT_TESTAPPS=ON" "-DLWS_WITH_SSL:BOOL=ON"
   )
 
   set(LIBWEBSOCKETS_TARGET_NAME websockets${CMAKE_STATIC_LIBRARY_SUFFIX})
@@ -95,7 +95,7 @@ if (WPCP_BUILD_CHECK)
     check-code
     GIT_REPOSITORY git://github.com/libcheck/check
     GIT_TAG "0.10.0"
-    CMAKE_ARGS "-DCMAKE_BUILD_TYPE:PATH=${CMAKE_BUILD_TYPE}" "-DCMAKE_PREFIX_PATH:PATH=${CMAKE_PREFIX_PATH}" "-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>"
+    CMAKE_ARGS "-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}" "-DCMAKE_TOOLCHAIN_FILE:PATH=${CMAKE_TOOLCHAIN_FILE}" "-DCMAKE_PREFIX_PATH:PATH=${CMAKE_PREFIX_PATH}" "-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>"
     BUILD_IN_SOURCE 1
   )