diff options
Diffstat (limited to 'cmake/Platform/Emscripten.cmake')
| -rw-r--r-- | cmake/Platform/Emscripten.cmake | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/cmake/Platform/Emscripten.cmake b/cmake/Platform/Emscripten.cmake new file mode 100644 index 00000000..9addafc6 --- /dev/null +++ b/cmake/Platform/Emscripten.cmake @@ -0,0 +1,46 @@ +# This file is a 'toolchain description file' for CMake. +# It teaches CMake about the Emscripten compiler, so that CMake can generate Unix Makefiles +# from CMakeLists.txt that invoke emcc. + +# To use this toolchain file with CMake, invoke CMake with the following command line parameters +# cmake -DEMSCRIPTEN=1 +# -DCMAKE_TOOLCHAIN_FILE=<EmscriptenRoot>/cmake/Platform/Emscripten.cmake +# -DCMAKE_MODULE_PATH=<EmscriptenRoot>/cmake +# -DCMAKE_BUILD_TYPE=<Debug|RelWithDebInfo|Release|MinSizeRel> +# -G "Unix Makefiles" +# <path/to/CMakeLists.txt> # Note, pass in here ONLY the path to the file, not the filename 'CMakeLists.txt' itself. + +# After that, build the generated Makefile with the command 'make'. On Windows, you may download and use 'mingw32-make' instead. + +# the name of the target operating system +SET(CMAKE_SYSTEM_NAME Emscripten) +SET(CMAKE_SYSTEM_VERSION 1) + +if ("$ENV{EMCC_BIN}" STREQUAL "") + message(ERROR "Environment variable EMCC_BIN has not been set! Please point it to Emscripten root directory!") +endif() + +#message(STATUS "CMake is using Emscripten toolchain file, Emscripten root path '$ENV{EMCC_BIN}'.") + +SET(CMAKE_FIND_ROOT_PATH $ENV{EMCC_BIN}) + +FILE(TO_CMAKE_PATH "$ENV{EMCC_BIN}" EMCC_PATH) + +# Specify the compilers to use for C and C++ +SET(CMAKE_C_COMPILER ${EMCC_PATH}/emcc) +SET(CMAKE_CXX_COMPILER ${EMCC_PATH}/em++) +SET(CMAKE_AR ${EMCC_PATH}/emar) +SET(CMAKE_RANLIB ${EMCC_PATH}/emranlib) + +set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) +set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) +set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH) +set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY) + +# Specify the program to use when building static libraries. Force Emscripten-related command line options to clang. +SET(CMAKE_CXX_ARCHIVE_CREATE "${CMAKE_CXX_COMPILER} -o <TARGET> -emit-llvm <LINK_FLAGS> <OBJECTS>") +SET(CMAKE_C_ARCHIVE_CREATE "${CMAKE_C_COMPILER} -o <TARGET> -emit-llvm <LINK_FLAGS> <OBJECTS>") + +# Set a global EMSCRIPTEN variable that can be used in client CMakeLists.txt to detect when building using Emscripten. +# There seems to be some kind of bug with CMake, so you might need to define this manually on the command line with "-DEMSCRIPTEN=1". +SET(EMSCRIPTEN 1) |