我想在我的构建中添加boost numeric bindings作为include目录。这通常编译为:
c++ -I/where/you/want/to/install/it/include/boost-numeric-bindings
我从程序中引用的所有头文件都是相对于此目录的,所以在CMake中我想找到这个目录(在父系统上安装的任何地方)并将其添加到include_directories
。
这样的事情:
find_directory(BNB_INCLUDE_DIR boost-numeric-bindings)
include_directories(${BNB_INCLUDE_DIR})
但是find_directory
命令不存在。我在这里错过了什么吗?
我试过了:
find_path(BNB_INCLUDE_DIR boost/numeric/bindings/traits/ublas_vector.hpp)
include_directories(${BNB_INCLUDE_DIR})
(这是我需要从库中获得的第一个文件),但这给了我文件的完整路径,而不是包含命令中指定文件的整个前缀的目录的路径。
答案 0 :(得分:4)
有关如何编写cmake查找文件的信息,请参阅this answer。举个例子,这是我为lm-sensors库写的一个:
# - Try to find the LM_SENSORS library.
#
# The following are set after configuration is done:
# LM_SENSORS_FOUND
# LM_SENSORS_INCLUDE_DIRS
# LM_SENSORS_LIBRARY_DIRS
# LM_SENSORS_LIBRARIES
find_path(LM_SENSORS_INCLUDE_DIR NAMES sensors/sensors.h)
find_library(LM_SENSORS_LIBRARY NAMES libsensors sensors)
message("LM_SENSORS include dir = ${LM_SENSORS_INCLUDE_DIR}")
message("LM_SENSORS lib = ${LM_SENSORS_LIBRARY}")
set(LM_SENSORS_LIBRARIES ${LM_SENSORS_LIBRARY})
set(LM_SENSORS_INCLUDE_DIRS ${LM_SENSORS_INCLUDE_DIR})
include(FindPackageHandleStandardArgs)
# Handle the QUIETLY and REQUIRED arguments and set the LM_SENSORS_FOUND to TRUE
# if all listed variables are TRUE
find_package_handle_standard_args(LM_SENSORS DEFAULT_MSG
LM_SENSORS_LIBRARY LM_SENSORS_INCLUDE_DIR)
mark_as_advanced(LM_SENSORS_INCLUDE_DIR LM_SENSORS_LIBRARY)
更改上面的内容以匹配您的库(boost-numeric-bindings
),将文件命名为Findboost-numeric-bindings.cmake
,并将其放在您的cmake模块目录中(或在源代码树中创建其中一个)。
然后在CMakeLists.txt
文件中,执行以下操作:
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} your_cmake_module_dir)
find_package (boost-numeric-bindings REQUIRED)
include_directories(${BOOST_NUMERIC_BINDINGS_INCLUDE_DIR})
然后,假设您没有在标准位置安装库,请按如下方式运行cmake:
cmake -D CMAKE_PREFIX_PATH:STRING="/where/you/have/installed/it/" <source path>
修改强>
在致电find_path
或find_package
之前,请确保您已定义项目。否则将不会设置CMAKE_SYSTEM_INCLUDE_PATH
。例如:
find_path (BOOST_STATE_HPP boost/statechart/state.hpp)
message ("CMAKE_FIND_ROOT_PATH=${CMAKE_FIND_ROOT_PATH}")
message ("CMAKE_SYSTEM_INCLUDE_PATH=${CMAKE_SYSTEM_INCLUDE_PATH}")
message ("CMAKE_SYSTEM_FRAMEWORK_PATH=${CMAKE_SYSTEM_FRAMEWORK_PATH}")
message ("CMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}")
message ("BOOST_STATE_HPP=${BOOST_STATE_HPP}")
project (my_project)
将导致以下cmake输出:
CMAKE_FIND_ROOT_PATH=
CMAKE_SYSTEM_INCLUDE_PATH=
CMAKE_SYSTEM_FRAMEWORK_PATH=
CMAKE_PREFIX_PATH=
BOOST_STATE_HPP=BOOST_STATE_HPP-NOTFOUND
而这:
project (my_project)
find_path (BOOST_STATE_HPP boost/statechart/state.hpp)
message ("CMAKE_FIND_ROOT_PATH=${CMAKE_FIND_ROOT_PATH}")
message ("CMAKE_SYSTEM_INCLUDE_PATH=${CMAKE_SYSTEM_INCLUDE_PATH}")
message ("CMAKE_SYSTEM_FRAMEWORK_PATH=${CMAKE_SYSTEM_FRAMEWORK_PATH}")
message ("CMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}")
message ("BOOST_STATE_HPP=${BOOST_STATE_HPP}")
导致成功找到state.hpp
并将BOOST_STATE_HPP
设置为/usr/include
,如您所愿:
CMAKE_FIND_ROOT_PATH=
CMAKE_SYSTEM_INCLUDE_PATH=/usr/include/w32api;/usr/X11R6/include;/usr/include/X11;/usr/pkg/include;/opt/csw/include;/opt/include;/usr/openwin/include
CMAKE_SYSTEM_FRAMEWORK_PATH=
CMAKE_PREFIX_PATH=
BOOST_STATE_HPP=/usr/include