c++ - 如何让cmake使用ubuntu系统以外的另一个opencv目录？

Question

具体来说，我想从 my/path/to/opencv/release 中包含 opencv，其中我自己的 opencv 是在 /usr/local/include< 中构建的，而不是系统的 opencv 库。如何设置 cmake 来实现这一点？我正在使用 Ubuntu 14.04。

Answer 1

为了提供示例，下面是 Luajit 库的 Find-CMake 文件。您的 CMake 项目有一个可能称为“FindOpenCV.cmake”之类的项目。它很可能具有手动添加的默认安装路径，例如:“/usr/include/luajit-2.0/usr/local/include/luajit-2.0”，您可以将这些 DIR 更改为所需的安装目录。如果默认路径包含在变量中，您可以找到该变量的定义并更改它(最好通过配置选项)，或者用字符串覆盖它。

# Try to find Lua or LuaJIT depending on the variable ENABLE_LUAJIT.
# Sets the following variables:
#   LUA_FOUND
#   LUA_INCLUDE_DIR
#   LUA_LIBRARY
#

SET (LUA_FOUND FALSE)

SET (LUA_INTERPRETER_TYPE "")

SET (LUA_INTERPRETER_TYPE "LuaJIT")
SET (LUA_LIBRARY_NAME luajit-5.1)
SET (LUA_INCLUDE_DIRS /usr/include/luajit-2.0 /usr/local/include/luajit-2.0)

FIND_PATH (LUA_INCLUDE_DIR lua.h ${LUA_INCLUDE_DIRS} 
            HINT ${LUAJIT_INCLUDE_DIR_HINT}/include)
FIND_LIBRARY (LUA_LIBRARY NAMES ${LUA_LIBRARY_NAME} PATHS /usr/lib /usr/local/lib
            HINT ${LUAJIT_INCLUDE_DIR_HINT}/bin)

#...

MARK_AS_ADVANCED ( LUA_INCLUDE_DIR LUA_LIBRARY)