强制编译器的cmake使构建失败

Posted 2021-05-03

我认为为cmake指定-DCMAKE_CXX_COMPILER_FORCED=1 -DCMAKE_C_COMPILER_FORCED=1会使我的构建更快，因为它会跳过编译器检查。相反，它使我的构建失败：

#16 470.8 -- Found Git: /usr/bin/git (found version "2.17.1") 
#16 470.8 -- Content of the error: 
#16 470.8 -- Version of this git repo: v0.0.1-2-g93b2a22
#16 470.9 -- The C compiler identification is GNU 5.5.0
#16 470.9 -- The CXX compiler identification is GNU 5.5.0
#16 470.9 -- GCC detected - Adding flags
#16 471.0 -- Looking for pthread.h
#16 471.0 -- Looking for pthread.h - found
#16 471.0 -- Looking for pthread_create
#16 471.1 -- Looking for pthread_create - not found
#16 471.1 -- Looking for pthread_create in pthreads
#16 471.1 -- Looking for pthread_create in pthreads - not found
#16 471.1 -- Looking for pthread_create in pthread
#16 471.2 -- Looking for pthread_create in pthread - found
#16 471.2 -- Found Threads: TRUE  
#16 471.2 -- Found Protobuf: /usr/local/lib/libprotobuf.so;-lpthread (found version "3.5.0") 
#16 471.2 CMake Error at /opt/cmake/share/cmake-3.12/Modules/FindBoost.cmake:2048 (message):
#16 471.2   Unable to find the requested Boost libraries.
#16 471.2 
#16 471.2   Boost version: 1.65.1
#16 471.2 
#16 471.2   Boost include path: /usr/include
#16 471.2 
#16 471.2   Could not find the following Boost libraries:
#16 471.2 
#16 471.2           boost_graph
#16 471.2 
#16 471.2   No Boost libraries were found.  You may need to set BOOST_LIBRARYDIR to the
#16 471.2   directory containing Boost libraries or BOOST_ROOT to the location of
#16 471.2   Boost.
#16 471.2 Call Stack (most recent call first):
#16 471.2   CMakeLists.txt:24 (find_package)
#16 471.2 
#16 471.2 
#16 471.3 -- Configuring incomplete, errors occurred!

安装了libboost-graph-dev，所以不清楚这里发生了什么 - 如果删除选项，那么构建工作正常。

这里发生了什么？

答案

来自文档：

Boost Graph Library是一个仅限标头的库，无需构建即可使用。

不需要在find_package(Boost ...)调用中指定仅头文件库。删除它，然后链接到Boost::boost调用中的目标target_link_libraries或将include_directories(${Boost_INCLUDE_DIRS})添加到您的CMakeLists.txt文件。