(平台:C ++ 14,Clang 3.8,Ubuntu 16.04,CMake 3.5.1)
我有两个静态库(PawLIB,CalikoCat)和一个依赖于OtherLibrary的可执行文件。在CalkoCat中是一个单一的类,Dummy。 (我只是在我们开始对这个库进行认真开发之前确保所有链接正确。)
Dummy类目前依赖PawLIB中的函数进行测试。
calikocat-source/include/calikocat/dummy.hpp
#include "pawlib/iochannel.hpp"
class Dummy
{
public:
Dummy(){}
static void speak();
~Dummy(){}
};
calikocat-source/src/dummy.cpp
#include "otherlibrary/dummy.hpp"
void Dummy::speak()
{
pawlib::ioc << "Hello, world!" << pawlib::io_end;
}
没问题。它与CMake正确编译和链接。
注意:您可以安全地假设此问题中的两个CMakeLists.txt文件中的所有变量都经过仔细测试和运行。我对每个人进行了三次检查。
calikocat-source/CMakeLists.txt
(摘要)
include_directories(include)
# Include headers of dependencies.
include_directories(${PAWLIB_DIR}/include)
add_library(${TARGET_NAME} STATIC
include/calikocat/dummy.hpp
src/dummy.cpp
)
# Link against dependencies.
target_link_libraries(${TARGET_NAME} ${PAWLIB_DIR}/lib/libpawlib.a)
现在,我喜欢将测试器应用程序包含在我的库中,这也不例外。在repo中,我将库和测试器代码分成calikocat-source
和calikocat-tester
目录。我也使用CMake作为测试人员......
calikocat-tester/CMakeLists.txt
(摘要)
include_directories(include)
# Include headers of dependencies.
include_directories(${PAWLIB_DIR}/include)
include_directories(../calikocat-source/include)
add_executable(calikocat-tester
main.cpp
)
# Link against dependencies.
target_link_libraries(${TARGET_NAME} ${CPGF_DIR}/lib/libcpgf.a)
target_link_libraries(${TARGET_NAME} ${PAWLIB_DIR}/lib/libpawlib.a)
target_link_libraries(${TARGET_NAME} ${CMAKE_HOME_DIRECTORY}/../calikocat-source/lib/$<CONFIG>/libcalikocat.a)
这是否正确构建完全取决于main.cpp
上是否存在单行!请仔细阅读以下内容。
calikocat-tester/main.cpp
,工作版
#include <calikocat/dummy.hpp>
#include <pawlib/iochannel.hpp>
int main()
{
pawlib::ioc << "Hello, world!" << pawlib::io_end;
Dummy::speak();
return 0;
}
编译并运行此版本按预期工作,将Hello, world!
打印到终端两次。
calikocat-tester/main.cpp
,非工作版
#include <calikocat/dummy.hpp>
#include <pawlib/iochannel.hpp>
int main()
{
//pawlib::ioc << "Hello, world!" << pawlib::io_end;
Dummy::speak();
return 0;
}
这个版本的文件,我直接使用PawLIB注释掉这行,不编译。这是错误...
[100%] Linking CXX executable ../../bin/Debug/calikocat-tester
../../../calikocat-source/lib/Debug/libcalikocat.a(dummy.cpp.o): In function `Dummy::speak()':
/home/jason/Code/Repositories/calikocat/calikocat-source/src/dummy.cpp:4: undefined reference to `pawlib::ioc'
/home/jason/Code/Repositories/calikocat/calikocat-source/src/dummy.cpp:5: undefined reference to `pawlib::iochannel::operator<<(pawlib::ioformat::IOControl const&)'
../../../calikocat-source/lib/Debug/libcalikocat.a(dummy.cpp.o): In function `pawlib::iochannel::operator<<(char const*)':
/home/jason/Code/Repositories/calikocat/calikocat-source/../../pawlib/pawlib/include/pawlib/iochannel.hpp:521: undefined reference to `pawlib::iochannel::resolve_pointer(char const*)'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
CMakeFiles/calikocat-tester.dir/build.make:99: recipe for target '../../bin/Debug/calikocat-tester' failed
我希望编译它,并且在运行时,只需将Hello, world!
打印到终端一次。
这里发生了什么,我错过了什么?
答案 0 :(得分:1)
你应该尝试颠倒这两行:
<script>
window.sessionStorage.redirect = window.location.href;
</script>
因为libcalikocat.a正在使用libpawlib.a中的符号,所以它应首先出现在命令行中。