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c - CMake，MacOS下三大桌面平台Win/Mac/Linux的交叉编译

问题描述

我在用 C 编写的 C# lib 的本机部分工作。这部分为主要平台 win/mac/linux 提供本机套接字 API。我已经在使用 CMake 在每个平台上独立构建源代码。

我目前的目标是在我的开发机器（MacOS）上为这些平台构建 lib。

Platforms list：

# 64 bit builds

- linux64
- osx
- win64

# 32 bit builds

- linux32
- win32

在阅读了有关交叉编译的 CMake 文档并在 GitHub 上搜索了一些示例之后，我仍然无法完成这项任务。

文档： https ://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html

GitHub搜索： https ://github.com/search?q=CMake+cross+compiling&type=Repositories

谁能解释一个详细的分步算法，我可以做些什么来达到这个目标？一个简单的“Hello World！” 共享库的示例将非常有帮助或链接到现有示例/项目。

谢谢。

更新：

项目结构：

build/
cmake/
  x64-linux.cmake
  x86_64-osx.cmake
src/
  native_socket.c
  native_socket.h


CMakeLists.txt
build_native.sh

CMakeLists.txt：

cmake_minimum_required(VERSION 3.20.1)

project(native_socket LANGUAGES C)

add_library(native_socket SHARED src/native_socket.c)
set_target_properties(native_socket PROPERTIES PREFIX "")

build_native.sh：

cmake -H. -B build/linux64 -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=cmake/x64-linux.cmake
cmake --build ./build/linux64 -v

cmake -H. -B build/osx -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE=cmake/x86_64-osx.cmake
cmake --build ./build/osx

x86_64-osx.cmake：

set(CMAKE_SYSTEM_NAME Darwin)
set(CMAKE_C_COMPILER gcc)

x64-linux.cmake：

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 1)

set(CMAKE_C_COMPILER gcc)
set(CMAKE_CROSSCOMPILING TRUE)

set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

运行构建脚本后，我在终端中看到链接器错误：

% ./build_native.sh
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64
/Applications/CMake.app/Contents/bin/cmake -S/Users/rdcm/dev/projects/PInvoke/PInvoke -B/Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64 --check-build-system CMakeFiles/Makefile.cmake 0
/Applications/CMake.app/Contents/bin/cmake -E cmake_progress_start /Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64/CMakeFiles /Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64//CMakeFiles/progress.marks
/Applications/Xcode.app/Contents/Developer/usr/bin/make  -f CMakeFiles/Makefile2 all
/Applications/Xcode.app/Contents/Developer/usr/bin/make  -f CMakeFiles/native_socket.dir/build.make CMakeFiles/native_socket.dir/depend
cd /Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64 && /Applications/CMake.app/Contents/bin/cmake -E cmake_depends "Unix Makefiles" /Users/rdcm/dev/projects/PInvoke/PInvoke /Users/rdcm/dev/projects/PInvoke/PInvoke /Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64 /Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64 /Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64/CMakeFiles/native_socket.dir/DependInfo.cmake --color=
Dependencies file "CMakeFiles/native_socket.dir/src/native_socket.c.o.d" is newer than depends file "/Users/rdcm/dev/projects/PInvoke/PInvoke/build/linux64/CMakeFiles/native_socket.dir/compiler_depend.internal".
Consolidate compiler generated dependencies of target native_socket
/Applications/Xcode.app/Contents/Developer/usr/bin/make  -f CMakeFiles/native_socket.dir/build.make CMakeFiles/native_socket.dir/build
[ 50%] Linking C shared library native_socket.so
/Applications/CMake.app/Contents/bin/cmake -E cmake_link_script CMakeFiles/native_socket.dir/link.txt --verbose=1
/usr/bin/gcc -fPIC -O3 -DNDEBUG -shared -Wl,-soname,native_socket.so -o native_socket.so CMakeFiles/native_socket.dir/src/native_socket.c.o 
ld: unknown option: -soname
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [native_socket.so] Error 1
make[1]: *** [CMakeFiles/native_socket.dir/all] Error 2
make: *** [all] Error 2

问题：

标签： cmacoscmakecross-platformcross-compiling

解决方案

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