Emscripten - 在 CMakeList 文件中传递 emscripten 选项

Emscripten - pass emscripten options in CMakeList file

本文关键字:emscripten 选项 文件 CMakeList Emscripten      更新时间:2023-10-16

如何使用emcmake cmake并传递emscripten命令行选项?

对c ++/CMake很陌生,但在谷歌上找不到任何有用的东西。所以也许问题只是愚蠢,在这种情况下,我道歉。

我可以使用以下CMakeList.txt文件构建我的项目(非Webassembly/普通桌面(

cmake_minimum_required(VERSION 3.7)
project(Engine)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
set(CMAKE_INCLUDE_PATH /usr/local/include)
set(SOURCE_FILES main.cpp src/Background.cpp src/Background.h src/Camera.cpp src/Chart.cpp src/Chart.h src/logger.cpp src/Engine.cpp src/Engine.h src/GL.cpp src/GL.h src/Instrument.cpp src/Instrument.h)
set(EMCC_LINKER_FLAGS "-s SAFE_HEAP=1 --bind -s WASM=1 -O3 -o ../index.js -s LEGACY_GL_EMULATION=0  -s GL_UNSAFE_OPTS=0 --pre-js pre-module.js --post-js post-module.js -s ASSERTIONS=1 -s GL_ASSERTIONS=1 -s INVOKE_RUN=0  -std=c++11 -s USE_WEBGL2=1 -s FULL_ES3=1 -s USE_GLFW=3 -s OFFSCREENCANVAS_SUPPORT=1 --preload-file shaders --preload-file extern --use-preload-plugins")
set(CMAKE_REQUIRED_FLAGS "${EMCC_LINKER_FLAGS}")
find_package(OPENGL REQUIRED)
find_package(GLEW REQUIRED)
#find_package(SDL2 REQUIRED)
find_package(glfw3 REQUIRED)
find_package(assimp REQUIRED)
find_package(Freetype REQUIRED)
include_directories(/emscripten/ /emscripten/emscripten/incoming/system/include)
include_directories(/usr/local/include)
include_directories(${FREETYPE_INCLUDE_DIRS} ${SDL2_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR} ${GLFW_INCLUDE_DIR} ${SDL2_IMAGE_INCLUDE_DIR} ${SDL2_TTF_INCLUDE_DIR})
#add_subdirectory(shaders)
add_executable(Engine ${SOURCE_FILES} extern/stb_image.cpp src/Camera.h src/Cubes.cpp src/Chart.cpp)
target_link_libraries(Engine ${FREETYPE_LIBRARIES} ${OPENGL_gl_LIBRARY} ${SDL2_LIBRARY} ${SDL2_IMAGE_LIBRARIES} ${SDL2_TTF_LIBRARIES} ${GLEW_LIBRARIES} glfw assimp)
#
#file(GLOB shaders/**/*.glsl shaders/*.glsl)
file(INSTALL shaders DESTINATION .)
file(INSTALL textures DESTINATION .)
#set(CMAKE_EXE_LINKER_FLAGS "${EMCC_LINKER_FLAGS}")
#SET_TARGET_PROPERTIES(Engine PROPERTIES LINK_FLAGS "-s SAFE_HEAP=1")
# add extra lib directories
#link_directories(/usr/local/lib)

而对于网络(组装(

emcc main.cpp ./src/*.cpp ./extern/*.cpp -o dist/engine.js -g  -s DISABLE_EXCEPTION_CATCHING=0 -s TOTAL_MEMORY=33554432  -s DEMANGLE_SUPPORT=1 -s SAFE_HEAP=1 --bind -s WASM=1 -Os -s LEGACY_GL_EMULATION=0  -s GL_UNSAFE_OPTS=0 --pre-js pre-module.js --post-js post-module.js -s ASSERTIONS=2 -s GL_ASSERTIONS=1 -s INVOKE_RUN=0  -std=c++11 -s USE_WEBGL2=1 -s FULL_ES3=1 -s USE_GLFW=3 -s OFFSCREENCANVAS_SUPPORT=1 --preload-file textures --preload-file shaders --preload-file extern --use-preload-plugins 

但是不应该使用emcmake cmake并将其全部保存在(单个(CMakeList文件中吗?如果我执行emcmake cmake && make它会生成一个非常快的文件,但它和空文件一样好(丢失所有文件(。

我想这可能归结为如何将参数传递给 CMakeFile 中的 emscripten......

使用 Emscripten 时复制 CMake 项目和问题指定选项(Emcmake(

但设置SET_TARGET_PROPERTIES(Engine PROPERTIES LINK_FLAGS "-s SAFE_HEAP=1")仅给出以下类型的错误:

error: no such file or directory: 'SAFE_HEAP=1'

所以真的..我是否错了 emcmake 的工作方式,如果不是,我该如何在 CMakeList 文件中传递 emscripten 参数?

非常感谢!

Oke 我发现我做错了什么。

作为Emscripten/CMake的菜鸟,我没有意识到emcmake不会自动使用emscripten基本cmake文件(如果我运行特殊的emscripten emcmake命令,我所期望的......(

无论如何,事实证明我不需要 emcmake,可以像这样从三元组调用 cmake ->

cmake -DCMAKE_BUILD_TYPE=Debug -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=/emscripten/emscripten/incoming/cmake/Modules/Platform/Emscripten.cmake . && make

这是我最后的CMakeList.txt

cmake_minimum_required(VERSION 3.7)
project(Engine)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/dist)
SET(CMAKE_BUILD_TYPE_INIT "Release")
set(CMAKE_CXX_STANDARD 11)
if (${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
set(CMAKE_C_COMPILER "emcc")
endif ()
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
set(SOURCE_FILES main.cpp src/Background.cpp src/Background.h src/Camera.cpp src/Chart.cpp src/Chart.h src/logger.cpp src/Engine.cpp src/Engine.h src/GL.cpp src/GL.h src/Instrument.cpp src/Instrument.h src/Text.cpp src/Text.h)
find_package(OPENGL REQUIRED)
if (NOT ${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
find_package(GLEW REQUIRED)
find_package(glfw3 REQUIRED)
find_package(assimp REQUIRED)
find_package(freetype REQUIRED)
endif ()
include_directories(
/emscripten/
/emscripten/emscripten/incoming/system/include
/opt/X11/include/freetype2
/usr/local/Cellar/freetype/2.8/include/freetype2
${FREETYPE_INCLUDE_DIRS}
${OPENGL_INCLUDE_DIR}
)
if (NOT ${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
include_directories(${GLEW_INCLUDE_DIR})
endif ()
add_executable(Engine ${SOURCE_FILES} extern/stb_image.cpp src/Camera.h src/Cubes.cpp src/Chart.cpp)
target_link_libraries(Engine ${OPENGL_gl_LIBRARY})
if (${CMAKE_SYSTEM_NAME} MATCHES "Emscripten")
set_target_properties(Engine PROPERTIES LINK_FLAGS "-o dist/engine.js -s USE_FREETYPE=1 -s DISABLE_EXCEPTION_CATCHING=0 -s DEMANGLE_SUPPORT=1 -s SAFE_HEAP=1 --bind -s WASM=1 -O2 -s LEGACY_GL_EMULATION=0  -s GL_UNSAFE_OPTS=0 --pre-js pre-module.js --post-js post-module.js -s ASSERTIONS=1 -s GL_ASSERTIONS=1 -s INVOKE_RUN=0  -std=c++11 -s USE_WEBGL2=1 -s FULL_ES3=1 -s USE_GLFW=3 -s OFFSCREENCANVAS_SUPPORT=1 --preload-file textures --preload-file shaders --preload-file fonts")
else ()
target_link_libraries(Engine glfw glew)
endif ()
file(INSTALL shaders DESTINATION .)
file(INSTALL textures DESTINATION .)

我认为问题是您正在覆盖 emcmake 也配置的CMAKE_MODULE_PATH。尝试将该行替换为:

list(APPEND CMAKE_MODULE_PATH <yourstuff>)

然后你只需要做">emcmakecmake"和">emmakemake",它应该可以正常工作。

在 cmake 文件中,您可以使用"if (EMSCRIPTEN("来调整 suff 仅针对 emscripten 情况,例如编译器或链接器标志