0
這似乎很簡單，但我浪費了大量的時間讓它工作。我只想構建並鏈接一個包含glfw3.h的main.cpp文件，但cmake沒有看到GLFW的lib路徑。對package_search_module的調用提供了正確的include dir，但生成的GLFW_LIBRARIES值只包含lib名稱'glfw3'，而且其命令行上沒有爲該構建指定其目錄。cmake package_search_module爲glfw3發現軟件包，不提供完整的lib路徑
我在這裏錯過了什麼？
這是我很簡單CMakeFiles.txt：
cmake_minimum_required(VERSION 3.3)
project(gltest)
set(CMAKE_VERBOSE_MAKEFILE true)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES main.cpp)
add_executable(gltest ${SOURCE_FILES})
find_package(PkgConfig REQUIRED)
pkg_search_module(GLFW REQUIRED glfw3)
include_directories(${GLFW_INCLUDE_DIRS})
target_link_libraries(gltest ${GLFW_LIBRARIES})
message("GLFW_LIBRARIES=${GLFW_LIBRARIES}")
這裏是生成輸出，在那裏你可以在上面那裏GLFW_LIBRARIES包含 'glfw3' 看到：
/Applications/CLion.app/Contents/bin/cmake/bin/cmake --build /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug --target all -- -j 8
/Applications/CLion.app/Contents/bin/cmake/bin/cmake -H/Users/dave/dev/gltest -B/Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug --check-build-system CMakeFiles/Makefile.cmake 0
GLFW_LIBRARIES=glfw3
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug
/Applications/CLion.app/Contents/bin/cmake/bin/cmake -E cmake_progress_start /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug/CMakeFiles /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug/CMakeFiles/progress.marks
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f CMakeFiles/Makefile2 all
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f CMakeFiles/gltest.dir/build.make CMakeFiles/gltest.dir/depend
cd /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug && /Applications/CLion.app/Contents/bin/cmake/bin/cmake -E cmake_depends "Unix Makefiles" /Users/dave/dev/gltest /Users/dave/dev/gltest /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug /Users/dave/Library/Caches/CLion12/cmake/generated/7a31a53e/7a31a53e/Debug/CMakeFiles/gltest.dir/DependInfo.cmake --color=
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f CMakeFiles/gltest.dir/build.make CMakeFiles/gltest.dir/build
[ 50%] Linking CXX executable gltest
/Applications/CLion.app/Contents/bin/cmake/bin/cmake -E cmake_link_script CMakeFiles/gltest.dir/link.txt --verbose=1
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -std=c++11 -g -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names CMakeFiles/gltest.dir/main.cpp.o -o gltest -lglfw3
ld: library not found for -lglfw3
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [gltest] Error 1
make[1]: *** [CMakeFiles/gltest.dir/all] Error 2
make: *** [all] Error 2
而且最後，這裏是用於pkg_search_module呼叫glfw3.pc pkg配置：
prefix=/usr/local/Cellar/glfw3/3.2.1
exec_prefix=${prefix}
includedir=${prefix}/include
libdir=${exec_prefix}/lib
Name: GLFW
Description: A multi-platform library for OpenGL, window and input
Version: 3.2.1
URL: http://www.glfw.org/
Requires.private:
Libs: -L${libdir} -lglfw3
Libs.private: -framework Cocoa -framework IOKit -framework CoreFoundation -framework CoreVideo
Cflags: -I${includedir}
~
更新：我得到了它這個工作，但它仍然覺得不妥 cmake的文檔建議不要使用link_directories，但是我能夠使這項工作通過使用和建立鏈接庫的列表：
set(LINK_LIBRARIES)
# GLFW lib
find_package(PkgConfig REQUIRED)
pkg_search_module(GLFW REQUIRED glfw3)
include_directories(${GLFW_INCLUDE_DIRS})
link_directories(${GLFW_LIBRARY_DIRS})
set(LINK_LIBRARIES ${LINK_LIBRARIES} ${GLFW_LIBRARIES})
add_executable(gltest ${SOURCE_FILES})
target_link_libraries(gltest ${LINK_LIBRARIES})