多個源建設的cmake

Question

我有以下的CMake文件

cmake_minimum_required(VERSION 2.6) 

# Locate GTest 
find_package(GTest REQUIRED) 
include_directories(${GTEST_INCLUDE_DIRS}) 

include_directories(../src/gcc_xml_parsing) 

file(GLOB info_model 

"../src/info_model/*.h" 
"../src/info_model/*.cpp" 
"../src/gcc_xml_parsing/*.h" 
"../src/gcc_xml_parsing/*.cpp" 
"../src/messages_filed_with_values/*.h" 
"../src/messages_filed_with_values/*.cpp" 

) 

# Link runTests with what we want to test and the GTest and pthread library 

add_executable(runTests_xml unit/gcc_xml_parsing/ut_XMLFile.cpp ${info_model}) 
add_executable(runTests_hexDumpUtil unit/info_model/ut_HexDumpUtil.cpp ${info_model}) 
add_executable(runTests_cstruct unit/info_model/ut_CStruct.cpp ${info_model}) 
add_executable(runTests_primitive_type_field unit/info_model /ut_PrimitiveTypeField.cpp ${info_model}) 
add_executable(runTests_enumField unit/info_model/ut_EnumField.cpp ${info_model}) 
add_executable(runTests_ArrayOfFields unit/info_model/ut_ArrayType.cpp ${info_model}) 

target_link_libraries(runTests_xml ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread boost_regex) 
target_link_libraries(runTests_hexDumpUtil ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread boost_regex) 
target_link_libraries(runTests_cstruct ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread boost_regex) 
target_link_libraries(runTests_primitive_type_field ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread boost_regex) 
target_link_libraries(runTests_enumField ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread boost_regex) 
target_link_libraries(runTests_ArrayOfFields ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread boost_regex) 

一般來說，程序編譯精細製作和運行生成文件之後。問題是，make文件爲每個add_executable構建$ {info_model}的源文件（makefile爲每個可執行文件構建所有* .o文件，如何修復它？謝謝。

編輯： 修改後在我的cmake（根據這個職位的第一個答案），我的應用程序編譯罰款，但有聯動的問題，整個日誌很大，因此，我要粘貼僅第一部分：

Linking CXX executable runTests_ArrayOfFields 
libinfo_model_lib.a(XMLFile.cpp.o): In function `bool boost::regex_search<__gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const* .... 

Answer 1

可以搬完文件到靜態庫：

add_library(info_model_lib STATIC ${info_model}) 

add_executable(runTests_xml unit/gcc_xml_parsing/ut_XMLFile.cpp) 
[...] 

target_link_libraries(runTests_xml ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES} pthread boost_regex info_model_lib) 
[...] 

這樣源文件將只被編譯一次（作爲構建info_model_lib目標的一部分），然後將鏈接到每個可執行文件。生成的二進制文件看起來幾乎相同。取決於所使用的編譯器，由於此更改，您可能會失去一些優化，但通常不足以顯着降低性能。