CMAKE节省生成的文件编译器选项

Question

我正在尝试将生成的thrift代码编译到我的源代码中。将thrift内容生成到CMAKE_CURRENT_BINARY_DIR中，然后使用SET_SOURCE_FILES_PROPERTIES(${ThriftGeneratedFiles} PROPERTIES GENERATED 1 COMPILE_OPTIONS "" )将生成的cpp文件添加到库中。

然后使用TARGET_INCLUDE_DIRECTORIES和SYSTEM关键字将包含路径添加到生成的文件中。当我试图编译它时，因为我的模块用-Wsuggest-override编译，所以它无法用can be marked override [-Werror=suggest-override]编译生成的cpp文件。我不明白为什么，SET_SOURCE_FILES_PROPERTIES不应该解决这个问题吗？

CMake文件段

ADD_COMPILE_OPTIONS(
        ...
        ...
        -Wsuggest-override
        ...
        ...
)
FIND_PROGRAM(THRIFT_COMPILER thrift ${_VCPKG_ROOT_DIR}/buildtrees/thrift/x64-linux-rel/compiler/cpp/bin/ NO_DEFAULT_PATH)
SET(ThriftOutputDir ${CMAKE_CURRENT_BINARY_DIR}/thrift/gen/)
FILE(MAKE_DIRECTORY ${ThriftOutputDir})

SET(ThriftGeneratedFiles
    ${ThriftOutputDir}/MyServer.cpp
    ${ThriftOutputDir}/My_types.cpp
    ${ThriftOutputDir}/My_constants.cpp
    )

ADD_CUSTOM_COMMAND(
        OUTPUT
        generated.timestamp
        COMMAND
        ${THRIFT_COMPILER} --gen cpp:no_default_operators -out ${ThriftOutputDir} ${CMAKE_SOURCE_DIR}/protocols/My.thrift
        WORKING_DIRECTORY
        ${CMAKE_BINARY_DIR}
        COMMENT "Generating source code from Thrift definition")
ADD_CUSTOM_TARGET(RunThriftCompiler
                  DEPENDS
                  generated.timestamp
                  COMMENT "Checking if re-generation is required")

ADD_LIBRARY(MyProject SHARED
            ${SOURCES}
            ${ThriftGeneratedFiles}
            )

SET_SOURCE_FILES_PROPERTIES(${ThriftGeneratedFiles} PROPERTIES
                            GENERATED 1
                            COMPILE_OPTIONS ""
                            )
TARGET_INCLUDE_DIRECTORIES(MyProject SYSTEM PRIVATE
                           ${PROTOBUF_INCLUDE_DIR}
                           ${ThriftOutputDir}
                           )

汇编电文：

cd /home/user/Development/Project/Project16/cmake-build-debug/lib/MyProject & /usr/bin/c++ -DCARES_STATICLIB -DMyProject_EXPORTS -I/home/user/Development/Project/Project16/lib/include/MyProject -I/home/user/Development/Project/Project16/lib/include -isystem /home/user/Development/Project/Project16/cmake-build-debug/ext/etcd -isystem /home/user/Development/Project/Project16/cmake-build-debug/protocols/home/user/Development/Project/Project16/ext/spdk/include /home/user/Development/vcpkg/installed/x64-linux/include -isystem -isystem -g -fPIC -include MyProject.h -fPIC --fPIC-fno-省略帧-指针-m调=核心-avx-i -mavx -进军=核心-avx-i -fno-plt -g -f堆栈-全f堆栈-检查-rdynamic -Wno-错误=未使用-参数-Wno-错误=未使用-但设置参数-Wshadow -Werror=address -error=数组-界-error=char-下标-error=enum-error=隐式-int-error=隐式- -Werror=comment -Werror=format -Werror=main -error=缺失-大括号-Werror=nonnull -error=指针-error=返回类型-error=序列-Wstrict混叠=1 -Werror=switch -Werror=trigraphs -Werror=uninitialized -error=1-Werror=switch-Werror=trigraphs-Werror=uninitialized-error=未知-限定符-Werror =符号比较-Werror=type--Werror-Winit body -Wuninitialized -Winit--Wuninitialized- -Wnonnull -Wno bool-Wlogical Wlogical declarations Wbool-比较-Wtype-限制-Waddress -W误导性-缩进-Wshift-负-值-Wbool比较-Wnull-取消引用--Wnonnull-cond--Wnonnull-Wno-Wnonnull-忽略-限定符-w遗失-括号-w遗失-包括-dirs-w序列点-Wno-返回本地-addr-Wbool类型-Wtrigraphs -w未使用-类型无效-内存-模型-是否可能-未初始化-Wno帧-地址-Wtrampolines -Wfloat-相等-Wno-无堆-对象-Wold-样式- -Wunused -Wcast但是-但是-设置-参数-Wframe大于=1100000-w指针-arith-Wwrite- -Wclobbered --Wclobbered-Wsizeof指针-memaccess-Wmemset-transposed args-Wlogical w冗余-decls-Wold pch -Wvarargs -Wno-Wvarargs-运行性能-w挥发性-寄存器-var-禁用-Wcast- -Wclobbered-Wcast--Wclobbered-Wcast-Wcast-Wcast-qual -Wnon--虚拟-dtor-Woverloaded/home/user/Development/Project/Project16/cmake-build-debug/lib/MyProject/thrift/gen/MyProject_types.cpp:7:0: /home/user/Development/Project/Project16/cmake-build-debug/lib/MyProject/thrift/gen/MyProject_types.h:72:15:错误文件中包含的cpp：‘virtual* MyProject::ThriftCapiException::what() const’可以标记为覆盖-Werror=suggest*什么() const抛出()；

如所示，将应用所有编译标志。

Answer 1

源文件上的属性(如COMPILE_DEFINITIONS和COMPILE_FLAGS )只能添加(编译选项)。使用这些属性，不可能为目标覆盖(删除)编译选项。( ADD_COMPILE_OPTIONS添加的选项最终会分配给目标)。

您可以从节约生成的源创建OBJECT库。对于该库，可以设置(即清除) 选项属性。然后，可以在主库中使用生成的对象文件：

# Object files for thrift-generated sources
add_library(thriftGenerated OBJECT ${ThriftGeneratedFiles})
# For these files clear compile options which has been set before
set_property(TARGET thriftGenerated PROPERTY COMPILE_OPTIONS)

# Then use object files for thrift-generated sources in other library
add_library(MyProject SHARED
    ${SOURCES}
    $<TARGET_OBJECTS:thriftGenerated>
)