CMake不会生成依赖目标文件

我正在编写一个小编译器，但现在我卡住了cmake，它不会生成所有依赖目标文件。CMake不会生成依赖目标文件

只有main.cpp编译：

#include <iostream> 
#include "lexer.h" 
#include "parser.h" 

int main() { 
    Lexer lexer(&std::cin); 
    Parser parser(&lexer); 

    parser.binaryOpPrecedence['<'] = 10; 
    parser.binaryOpPrecedence['+'] = 20; 
    parser.binaryOpPrecedence['-'] = 20; 
    parser.binaryOpPrecedence['*'] = 40; 

    std::cerr << "ready> "; 
    parser.getNextToken(); 

    parser.parse(); 

    return 0; 
}

我CMakeLists.txt如下（子目录）：

set(SOURCE_FILES 
    ${PROJECT_SOURCE_DIR}/src/ast/binary.h 
    ${PROJECT_SOURCE_DIR}/src/ast/call.h 
    ${PROJECT_SOURCE_DIR}/src/ast/expression.h 
    ${PROJECT_SOURCE_DIR}/src/ast/function.h 
    ${PROJECT_SOURCE_DIR}/src/ast/number.h 
    ${PROJECT_SOURCE_DIR}/src/ast/prototype.h 
    ${PROJECT_SOURCE_DIR}/src/ast/variable.h 
    ${PROJECT_SOURCE_DIR}/src/lexer.cpp 
    ${PROJECT_SOURCE_DIR}/src/parser.cpp 
    PARENT_SCOPE 
) 

add_executable(kaleidoscope main.cpp ${SOURCE_FILES})

至于说，只有main.cpp被编译到main.cpp.o但不lexer.cpp和parser.cpp，因此链接崩溃与未解决的符号。不知道，我做错了什么。

/usr/bin/cmake --build /home/patkar/.clion10/system/cmake/generated/d6bd25de/d6bd25de/Debug --target kaleidoscope -- -j 4 
Scanning dependencies of target kaleidoscope 
[100%] Building CXX object src/CMakeFiles/kaleidoscope.dir/main.cpp.o 
Linking CXX executable kaleidoscope 
CMakeFiles/kaleidoscope.dir/main.cpp.o: In function `Lexer': 
/home/patkar/workspace/compiler-fun/kaleidoscope/src/lexer.h:49: undefined reference to `vtable for Lexer' 
CMakeFiles/kaleidoscope.dir/main.cpp.o: In function `main': 
/home/patkar/workspace/compiler-fun/kaleidoscope/src/main.cpp:36: undefined reference to `Parser::parse()' 
CMakeFiles/kaleidoscope.dir/main.cpp.o: In function `~Lexer': 
/home/patkar/workspace/compiler-fun/kaleidoscope/src/lexer.h:38: undefined reference to `vtable for Lexer' 
/home/patkar/workspace/compiler-fun/kaleidoscope/src/lexer.h:38: undefined reference to `vtable for Lexer' 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 
make[3]: *** [src/kaleidoscope] Error 1 
make[2]: *** [src/CMakeFiles/kaleidoscope.dir/all] Error 2 
make[1]: *** [src/CMakeFiles/kaleidoscope.dir/rule] Error 2 
make: *** [kaleidoscope] Error 2

来源

2015-01-04 Emii Khaos

您确认'SOURCE_FILES'设置为正确的路径吗？ – 2015-01-04 11:25:46

不是直接的，但是路径是正确的，因为我也在测试目标中使用了'SOURCE_FILES'，它在那里工作。就是这样，'PARENT_SCOPE'在当前范围内使变量不可访问/为空？ – 2015-01-04 11:50:37

是的，我遇到了同样的问题。不幸的是，[documentation]（http://www.cmake.org/cmake/help/v3.0/command/set.html）也没有提供这种行为的任何规范。你可以通过在父范围中设置它，它也可以在当前范围内访问。 – 2015-01-04 12:01:57

好吧，这是使我SOURCE_FILES变量无法进入/在当前范围内空PARENT_SCOPE：o

我需要为我的测试目标访问那里所有的源文件。我现在使用PARENT_SCOPE作为解决方法创建了一个新变量。

set(SOURCE_FILES 
    ${PROJECT_SOURCE_DIR}/src/ast/binary.h 
    ${PROJECT_SOURCE_DIR}/src/ast/call.h 
    ${PROJECT_SOURCE_DIR}/src/ast/expression.h 
    ${PROJECT_SOURCE_DIR}/src/ast/function.h 
    ${PROJECT_SOURCE_DIR}/src/ast/number.h 
    ${PROJECT_SOURCE_DIR}/src/ast/prototype.h 
    ${PROJECT_SOURCE_DIR}/src/ast/variable.h 
    ${PROJECT_SOURCE_DIR}/src/lexer.cpp 
    ${PROJECT_SOURCE_DIR}/src/parser.cpp 
) 

set(SOURCE_TEST_FILES ${SOURCE_FILES} PARENT_SCOPE) 

add_executable(kaleidoscope main.cpp ${SOURCE_FILES})

来源

2015-01-04 11:46:17

我想你的意思'add_executable（万花筒的main.cpp $ {} SOURCE_TEST_FILES）'：P – 2015-01-04 12:02:48

没有，'add_executable（万花筒的main.cpp $ {} SOURCE_FILES）'是正确的。 'SOURCE_TEST_FILES'是具有'PARENT_SCOPE'来在测试可执行文件中访问它的人。 – 2015-01-04 12:24:33

CMake不会生成依赖目标文件

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