c++ - 通过 CMake 设置 Ninja 值（交叉编译）
问题描述
我目前正在尝试将我在 macOS 上编写的程序交叉编译到 Linux，并且我必须对build.ninja文件进行一些更改以使其成为可能（特别是链接器命令/链接库的其他位置）。但是，当我重新配置 CMake 时，这会被清除。有没有一种方法可以使用 CMake 在我的 Ninja 文件中设置值，而不是从哪里设置它们？我还在这个项目中使用 vcpkg 和 GCC 10.2.0 for x86_64 Linux。忍者文件必须被修剪以适应字符限制，如果需要，我可以找到一种不同的方式来放置完整的文件。这是我当前的 CMakeLists，第一个是我的顶级 CMakeLists，第二个是链接所有内容的 CMakeLists：
Removed to make room for edits, working file can be found in edit 2
# CMakeList.txt : CMake project for ImpromptuServer, include source and define
# project specific logic here.
#
cmake_minimum_required(VERSION 3.8)
add_subdirectory("database")
add_subdirectory("web")
add_subdirectory("api")
add_subdirectory("utils")
# Add source to this project's executable.
file(GLOB_RECURSE web ./web/*.cpp ./web/*.hpp)
file(GLOB_RECURSE database ./database/*.cpp ./datbase/*.hpp)
file(GLOB_RECURSE api ./api/*.cpp ./api/*.hpp)
add_library(libweb ${web})
add_library(libdata ${database})
add_library(libapi ${api})
add_executable(ImpromptuServer "ImpromptuServer.cpp" ${web} ${database} ${api})
set(ALL_LIBS Wt::Wt Wt::Dbo Wt::HTTP Wt::DboSqlite3 cryptopp-static json11 OpenSSL::SSL OpenSSL::Crypto cpr)
# TODO: Add tests and install targets if needed.
target_link_libraries(ImpromptuServer PRIVATE ${ALL_LIBS})
target_link_libraries(libweb PRIVATE Wt::Wt Wt::Dbo Wt::HTTP Wt::DboSqlite3)
target_link_libraries(libdata PRIVATE Wt::Wt Wt::Dbo Wt::HTTP Wt::DboSqlite3)
target_link_libraries(libapi PRIVATE ${ALL_LIBS})
我知道GLOB_RECURSE这不是最佳实践，但我不想更改它，除非它可以解决我的问题。这是我的原始build.ninja文件：
REMOVED due to irrelevancy to question.
这是我为开始工作而修改的一个：
REMOVED due to irrelevancy to question.
但是，即使我使用修改后的 ninja 文件成功编译，我也会收到此输出消息，并且代码无法在 Linux 机器上运行：
/Volumes/CaseSensitive/cross/lib/gcc/x86_64-linux/10.2.0/../../../../x86_64-linux/bin/ld: warning: cannot find entry symbol arch_paths_first; defaulting to 0000000000414000
为 macOS 编译并使用原始build.ninja文件时，代码运行良好。
编辑 1
经过大量工作，我已经让 CMake 使用工具链文件，但我仍然有一个挥之不去的问题，即 CMake 找不到Threads::Threads. 这是我目前的CMakeLists.txt：
Working file can be found in edit 2
这是我得到的输出消息：
[main] Configuring folder: ImpromptuServer
[cmake] -- Found OpenSSL: /usr/lib/libcrypto.dylib
[cmake] -- Found ZLIB: /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/lib/libz.tbd (found version "1.2.11")
[cmake] -- Found CURL: /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/lib/libcurl.tbd (found version "7.64.1")
[cmake] -- Configuring done
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] -- Generating done
[cmake] CMake Generate step failed. Build files cannot be regenerated correctly.
[main] Configuring folder: ImpromptuServer
[proc] Executing command: /usr/local/bin/cmake --no-warn-unused-cli -DCMAKE_TOOLCHAIN_FILE=/Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake -DCMAKE_CROSSCOMPILING=True -Wno-dev -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_BUILD_TYPE:STRING=Debug -DCMAKE_C_COMPILER:FILEPATH=/Volumes/CaseSensitive/cross/bin/x86_64-linux-gcc -DCMAKE_CXX_COMPILER:FILEPATH=/Volumes/CaseSensitive/cross/bin/x86_64-linux-g++ -H/Users/jackhogan/Desktop/Code/C++/ImpromptuServer -B/Users/jackhogan/Desktop/Code/C++/ImpromptuServer/build -G Ninja
[cmake] Not searching for unused variables given on the command line.
[cmake] INFO Using Linux protocols
[cmake] -- Configuring done
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:331 (_add_executable):
[cmake] Target "ImpromptuServer" links to target "Threads::Threads" but the target
[cmake] was not found. Perhaps a find_package() call is missing for an IMPORTED
[cmake] target, or an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:20 (add_executable)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libapi" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:18 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libdata" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:17 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] CMake Error at /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake:360 (_add_library):
[cmake] Target "libweb" links to target "Threads::Threads" but the target was not
[cmake] found. Perhaps a find_package() call is missing for an IMPORTED target, or
[cmake] an ALIAS target is missing?
[cmake] Call Stack (most recent call first):
[cmake] ImpromptuServer/CMakeLists.txt:16 (add_library)
[cmake]
[cmake]
[cmake] -- Generating done
[cmake] CMake Generate step failed. Build files cannot be regenerated correctly.
编辑 2
现在一切都使用这个 CMake 文件正确配置：
# CMakeList.txt : Top-level CMake project file, do global configuration
# and include sub-projects here.
#
cmake_minimum_required(VERSION 3.8)
project (ImpromptuServer C CXX)
if(${CMAKE_CXX_COMPILER_ID} STREQUAL AppleClang)
#set(CMAKE_TOOLCHAIN_FILE /Users/jackhogan/Desktop/Code/Utilities/vcpkg/scripts/buildsystems/vcpkg.cmake)
set(LIB_DIR /Users/jackhogan/Desktop/Code/Utilities/vcpkg/installed/x64-osx/debug/lib)
add_compile_options(-std=c++17)
find_package(threads REQUIRED)
else()
message(INFO " Using Linux protocols")
if(NOT ${CMAKE_TOOLCHAIN_FILE} STREQUAL /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake)
message(FATAL_ERROR " Incorrect toolchain file")
endif()
add_compile_options(-std=gnu++17)
#set(CMAKE_TOOLCHAIN_FILE /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake)
set(CMAKE_CROSSCOMPILING true)
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR x86_64)
set(LIB_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/debug/lib)
set(CMAKE_FIND_ROOT_PATH /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/debug/lib)
set(CMAKE_SYSROOT /Volumes/CaseSensitive/cross/x86_64-linux/)
# Find libraries, may be changed later
set(wt_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/share/wt/)
set(OPENSSL_INCLUDE_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/openssl)
set(OPENSSL_ROOT_DIR /Volumes/CaseSensitive/cross/x86_64-linux/lib/)
set(cryptopp_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/share/cryptopp/)
set(cpr_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/share/cpr/)
# Find pthread
set(CMAKE_THREAD_LIBS_INIT /Volumes/CaseSensitive/cross/x86_64-linux/lib/libpthread.a)
include_directories(/Volumes/CaseSensitive/cross/x86_64-linux/lib/)
include_directories(/Volumes/CaseSensitive/cross/x86_64-linux/lib64/)
include_directories(/Volumes/CaseSensitive/cross/x86_64-linux/include/)
include_directories(/Volumes/CaseSensitive/cross/x86_64-linux/include/linux/)
include_directories(/Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/)
#include_directories(/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include)
#set(Boost_NO_SYSTEM_PATHS true)
#set(BOOST_INCLUDEDIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/boost/)
#set(BOOST_LIBRARYDIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/debug/lib/)
#add_link_options(-g -isysroot /Volumes/CaseSensitive/cross/x86_64-linux)
find_package(boost REQUIRED)
find_package(Threads REQUIRED)
endif()
# Install packages
find_package(wt REQUIRED)
find_package(OpenSSL REQUIRED)
find_package(cryptopp CONFIG REQUIRED)
find_package(cpr CONFIG REQUIRED)
add_library(json11 STATIC IMPORTED)
set_target_properties(json11 PROPERTIES IMPORTED_LOCATION ${LIB_DIR}/libjson11.a)
# Include sub-projects.
add_subdirectory ("ImpromptuServer")
但是我收到很多这样的错误：
[main] Building folder: ImpromptuServer
[build] Starting build
[proc] Executing command: /usr/local/bin/cmake --build /Users/jackhogan/Desktop/Code/C++/ImpromptuServer/build --config Debug --target all -- -j 22
[build] [22/29 3% :: 0.087] Building CXX object ImpromptuServer/CMakeFiles/libapi.dir/api/internal/ios/AppStore.cpp.o
[build] [23/29 6% :: 0.091] Building CXX object ImpromptuServer/CMakeFiles/ImpromptuServer.dir/api/internal/ios/AppStore.cpp.o
[build] [24/29 10% :: 1.946] Building CXX object ImpromptuServer/CMakeFiles/ImpromptuServer.dir/web/pages/About.cpp.o
[build] FAILED: ImpromptuServer/CMakeFiles/ImpromptuServer.dir/web/pages/About.cpp.o
[build] /Volumes/CaseSensitive/cross/bin/x86_64-linux-g++ --sysroot=/Volumes/CaseSensitive/cross/x86_64-linux/ -DBOOST_ALL_NO_LIB -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_THREAD_DYN_LINK -I/Volumes/CaseSensitive/cross/x86_64-linux/lib -I/Volumes/CaseSensitive/cross/x86_64-linux/lib64 -isystem /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include -isystem /usr/local/include -isystem /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/openssl -isystem /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -g -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -std=gnu++17 -MD -MT ImpromptuServer/CMakeFiles/ImpromptuServer.dir/web/pages/About.cpp.o -MF ImpromptuServer/CMakeFiles/ImpromptuServer.dir/web/pages/About.cpp.o.d -o ImpromptuServer/CMakeFiles/ImpromptuServer.dir/web/pages/About.cpp.o -c ../ImpromptuServer/web/pages/About.cpp
[build] In file included from /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/bits/localefwd.h:40,
[build] from /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/string:43,
[build] from /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/bitset:47,
[build] from /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/Wt/WWebWidget.h:11,
[build] from /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/Wt/WInteractWidget.h:10,
[build] from /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/Wt/WContainerWidget.h:10,
[build] from ../ImpromptuServer/web/pages/About.hpp:3,
[build] from ../ImpromptuServer/web/pages/About.cpp:1:
[build] /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/x86_64-linux/bits/c++locale.h:52:23: error: 'uselocale' was not declared in this scope; did you mean 'setlocale'?
[build] 52 | extern "C" __typeof(uselocale) __uselocale;
[build] | ^~~~~~~~~
[build] | setlocale
[build] /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/x86_64-linux/bits/c++locale.h:62:11: error: '__locale_t' does not name a type
[build] 62 | typedef __locale_t __c_locale;
[build] | ^~~~~~~~~~
[build] /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/x86_64-linux/bits/c++locale.h:69:26: error: '__c_locale' does not name a type
[build] 69 | __convert_from_v(const __c_locale& __cloc __attribute__ ((__unused__)),
[build] | ^~~~~~~~~~
[build] /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/x86_64-linux/bits/c++locale.h: In function 'int std::__convert_from_v(const int&, char*, int, const char*, ...)':
[build] /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/x86_64-linux/bits/c++locale.h:75:5: error: '__c_locale' was not declared in this scope; did you mean '__cloc'?
[build] 75 | __c_locale __old = __gnu_cxx::__uselocale(__cloc);
[build] | ^~~~~~~~~~
[build] | __cloc
[build] /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/x86_64-linux/bits/c++locale.h:100:28: error: '__old' was not declared in this scope
[build] 100 | __gnu_cxx::__uselocale(__old);
[build] | ^~~~~
[build] /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/x86_64-linux/bits/c++locale.h:100:33: error: '__gnu_cxx::__uselocale' cannot be used as a function
[build] 100 | __gnu_cxx::__uselocale(__old);
[build] | ^
编辑 3
这是我的 CMake 输出：
[main] Configuring folder: ImpromptuServer
[driver] Removing /Users/jackhogan/Desktop/Code/C++/ImpromptuServer/build/CMakeCache.txt
[driver] Removing /Users/jackhogan/Desktop/Code/C++/ImpromptuServer/build/CMakeFiles
[proc] Executing command: /usr/local/bin/cmake --no-warn-unused-cli -DCMAKE_TOOLCHAIN_FILE=/Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake -DCMAKE_CROSSCOMPILING=True -Wno-dev -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_BUILD_TYPE:STRING=Debug -DCMAKE_C_COMPILER:FILEPATH=/Volumes/CaseSensitive/cross/bin/x86_64-linux-gcc -DCMAKE_CXX_COMPILER:FILEPATH=/Volumes/CaseSensitive/cross/bin/x86_64-linux-g++ -H/Users/jackhogan/Desktop/Code/C++/ImpromptuServer -B/Users/jackhogan/Desktop/Code/C++/ImpromptuServer/build -G Ninja
[cmake] Not searching for unused variables given on the command line.
[cmake] -- The C compiler identification is GNU 10.2.0
[cmake] -- The CXX compiler identification is GNU 10.2.0
[cmake] -- Checking whether C compiler has -isysroot
[cmake] -- Checking whether C compiler has -isysroot - yes
[cmake] -- Checking whether C compiler supports OSX deployment target flag
[cmake] -- Checking whether C compiler supports OSX deployment target flag - no
[cmake] -- Detecting C compiler ABI info
[cmake] -- Detecting C compiler ABI info - done
[cmake] -- Check for working C compiler: /Volumes/CaseSensitive/cross/bin/x86_64-linux-gcc - skipped
[cmake] -- Detecting C compile features
[cmake] -- Detecting C compile features - done
[cmake] -- Checking whether CXX compiler has -isysroot
[cmake] -- Checking whether CXX compiler has -isysroot - yes
[cmake] -- Checking whether CXX compiler supports OSX deployment target flag
[cmake] -- Checking whether CXX compiler supports OSX deployment target flag - no
[cmake] -- Detecting CXX compiler ABI info
[cmake] -- Detecting CXX compiler ABI info - done
[cmake] -- Check for working CXX compiler: /Volumes/CaseSensitive/cross/bin/x86_64-linux-g++ - skipped
[cmake] -- Detecting CXX compile features
[cmake] -- Detecting CXX compile features - done
[cmake] INFO Using Linux protocols
[cmake] -- Found Boost: /usr/local/lib/cmake/Boost-1.72.0/BoostConfig.cmake (found version "1.72.0")
[cmake] -- Looking for pthread.h
[cmake] -- Looking for pthread.h - not found
[cmake] -- Found Threads: TRUE
[cmake] -- Found OpenSSL: /usr/lib/libcrypto.dylib
[cmake] -- Found ZLIB: /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/lib/libz.tbd (found version "1.2.11")
[cmake] -- Found CURL: /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/lib/libcurl.tbd (found version "7.64.1")
[cmake] -- Configuring done
[cmake] -- Generating done
[cmake] -- Build files have been written to: /Users/jackhogan/Desktop/Code/C++/ImpromptuServer/build
[cmakefileapi-parser] Code model version (2.1) of cmake-file-api is unexpected. Expecting (2.0). IntelliSense configuration may be incorrect.
[cmakefileapi-parser] Code model version (2.1) of cmake-file-api is unexpected. Expecting (2.0). IntelliSense configuration may be incorrect.
解决方案
经过一周的努力，我终于找到了解决方案。解决方案来自这个答案。这是我最终可以为 MacOS 和 Linux 编译的 CMake 文件：
# CMakeList.txt : Top-level CMake project file, do global configuration
# and include sub-projects here.
#
cmake_minimum_required(VERSION 3.8)
# Target-specific stuff to be done before creating the project
if(${USE_LINUX})
# Prevents linker from not finding program entry point
set(HAVE_FLAG_SEARCH_PATHS_FIRST 0)
endif()
project (ImpromptuServer CXX)
if(NOT ${USE_LINUX})
message(INFO " Using MacOS protocols")
if(NOT ${CMAKE_TOOLCHAIN_FILE} STREQUAL /Users/jackhogan/Desktop/Code/Utilities/vcpkg/scripts/buildsystems/vcpkg.cmake)
message(FATAL_ERROR " Incorrect toolchain file")
endif()
set(LIB_DIR /Users/jackhogan/Desktop/Code/Utilities/vcpkg/installed/x64-osx/debug/lib)
add_compile_options(-std=c++17)
find_package(Threads REQUIRED)
else()
message(INFO " Using Linux protocols")
if(NOT ${CMAKE_TOOLCHAIN_FILE} STREQUAL /Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake)
message(FATAL_ERROR " Incorrect toolchain file")
endif()
set(CMAKE_C_LINK_FLAGS "")
set(CMAKE_CXX_LINK_FLAGS "")
add_compile_options(-std=gnu++17)
add_link_options(-Wl,--copy-dt-needed-entries)
set(CMAKE_CROSSCOMPILING true)
# Get rid of OSX SDK to prevent incorrect linking
set(CMAKE_OSX_SYSROOT "/Volumes/CaseSensitive/cross/x86_64-linux/include/")
set(LIB_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/debug/lib)
set(CMAKE_FIND_ROOT_PATH /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/debug/lib)
set(CMAKE_SYSROOT /)
# Find libraries, may be changed later
set(wt_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/share/wt/)
set(cryptopp_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/share/cryptopp/)
set(cpr_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/share/cpr/)
set(OPENSSL_INCLUDE_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/openssl)
set(OPENSSL_ROOT_DIR /Volumes/CaseSensitive/cross/x86_64-linux/lib/)
# Cheat a little bit by linking a dynamic library
set(OPENSSL_CRYPTO_LIBRARY /Volumes/CaseSensitive/cross/x86_64-linux/lib/libcrypto.a)
set(OPENSSL_USE_STATIC_LIBS true)
# Special system library include directories
set(ZLIB_INCLUDE_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/)
set(ZLIB_ROOT /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/lib/)
set(CURL_INCLUDE_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/curl/)
# Find pthread and link to non-apple
set(CMAKE_THREAD_LIBS_INIT /Volumes/CaseSensitive/cross/x86_64-linux/lib/libpthread.a)
# GCC includes
include_directories(SYSTEM /Volumes/CaseSensitive/cross/lib/gcc/x86_64-linux/10.2.0/include/)
# System includes
include_directories(SYSTEM /Volumes/CaseSensitive/cross/x86_64-linux/include/c++/10.2.0/)
#set(BOOST_INCLUDE_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/include/boost/)
set(Boost_NO_BOOST_CMAKE on)
set(Boost_USE_STATIC_LIBS true)
set(Boost_LIBRARY_DIR /Volumes/CaseSensitive/vcpkgLinux/installed/x64-linux/lib/)
find_package(Boost COMPONENTS program_options filesystem thread chrono date_time REQUIRED)
find_package(Threads REQUIRED)
endif()
# Install packages
find_package(wt REQUIRED)
find_package(OpenSSL REQUIRED)
find_package(cryptopp CONFIG REQUIRED)
find_package(cpr CONFIG REQUIRED)
add_library(json11 STATIC IMPORTED)
set_target_properties(json11 PROPERTIES IMPORTED_LOCATION ${LIB_DIR}/libjson11.a)
# Include sub-projects.
add_subdirectory ("ImpromptuServer")
虽然所有路径都是系统特定的，但以后可以通过一些更高级的脚本来改进。以下是我分别在 MacOS 和 Linux 上传递的参数：
-DCMAKE_TOOLCHAIN_FILE=/Users/jackhogan/Desktop/Code/Utilities/vcpkg/scripts/buildsystems/vcpkg.cmake -DUSE_LINUX=false
-DCMAKE_TOOLCHAIN_FILE=/Volumes/CaseSensitive/vcpkgLinux/scripts/buildsystems/vcpkg.cmake -DUSE_LINUX=true
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