Linux下OpenGL的安装与cmake编译OpenGL程序

OpenGL安装

安装命令如下：

$ sudo apt install build-essential

$ sudo apt install libgl1-mesa-dev

$ sudo apt install libglu1-mesa-dev

$ sudo apt install freeglut3 freeglut3-dev

cmake编译OpenGL程序

project

├── MeshLib

│ └── core

│ └── bmp

│ └── RgbImage.cpp

├── MyDemo

│ ├── main.cpp

│ ├── CMakeLists.txt

│ └── build

│

其他头文件的路径直接在.cpp里体现出来，如：

在main.cpp中：

#include

#include"../MeshLib/core/viewer/Arcball.h"

#include"../MeshLib/core/bmp/RgbImage.h"

#include"../MeshLib/core/Geometry/quat.h"

否则，如果直接写 #include “Arcball.h” 之类的，就需要在CMakeLists.txt中包含所有头文件路径(如glut.h就需要指定路径 OpenGL_INCLUDE_DIR)

若使用freeglut的话

MyDemo/CMakeLists.txt

cmake_minimum_required(VERSION 2.6)

add_compile_options(-std=c++11)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/build/CMakeModules/")

project(MyDemo)

find_package(OpenGL REQUIRED)

include_directories(${OpenGL_INCLUDE_DIR})

find_package(FREEGLUT REQUIRED)

include_directories(${FREEGLUT_INCLUDE_DIR})

add_executable(${PROJECT_NAME} ${PROJECT_BINARY_DIR}/../../MeshLib/core/bmp/RgbImage.cpp main.cpp )

target_link_libraries(${PROJECT_NAME} ${OPENGL_LIBRARY} ${FREEGLUT_LIBRARY} ${OPENGL_LIBRARY})

但是光这样还是没办法的，因为找不到freeglut库，这时候需要再写一个搜索package frerglut的CMakeLitsts.txt

在build目录下mkdir一个CMakeModules, 新建一个文件名FindFREEGLUT.cmake的文件，编辑内容如下(为什么是在build目录下新建而不是在MyDemo目录下？因为我们是进入build中，执行命令”cmake ..“的)

# Try to find the FREEGLUT library

#

# FREEGLUT_INCLUDE_DIR

# FREEGLUT_LIBRARY

# FREEGLUT_FOUND

FIND_PATH(

FREEGLUT_INCLUDE_DIR GL/freeglut.h GL/gl.h GL/glu.h GL/glew.h

${CMAKE_INCLUDE_PATH}

$ENV{include}

${OPENGL_INCLUDE_DIR}

/usr/include

/usr/local/include

)

SET(STORE_CMAKE_FIND_FRAMEWORK ${CMAKE_FIND_FRAMEWORK})

SET(CMAKE_FIND_FRAMEWORK NEVER)

FIND_LIBRARY(

FREEGLUT_LIBRARY

NAMES freeglut_static freeglut glut GL

PATH

/opt/local/lib

${CMAKE_LIBRARY_PATH}

$ENV{lib}

/usr/lib

/usr/local/lib

)

SET(CMAKE_FIND_FRAMEWORK ${STORE_CMAKE_FIND_FRAMEWORK})

IF (FREEGLUT_INCLUDE_DIR AND FREEGLUT_LIBRARY)

SET(FREEGLUT_FOUND TRUE)

ENDIF (FREEGLUT_INCLUDE_DIR AND FREEGLUT_LIBRARY)

IF (FREEGLUT_FOUND)

IF (NOT FREEGLUT_FIND_QUIETLY)

MESSAGE(STATUS "Found FREEGLUT: ${FREEGLUT_LIBRARY}")

ENDIF (NOT FREEGLUT_FIND_QUIETLY)

ELSE (FREEGLUT_FOUND)

IF (FREEGLUT_FIND_REQUIRED)

MESSAGE(FATAL_ERROR "Could not find FREEGLUT")

ENDIF (FREEGLUT_FIND_REQUIRED)

ENDIF (FREEGLUT_FOUND)

若使用glut的话

则则比较简单：

cmake_minimum_required (VERSION 2.6)

project(OpenGL)

find_package(OpenGL REQUIRED)

include_directories(${OPENGL_INCLUDE_DIR})

find_package(GLUT REQUIRED)

include_directories(${GLUT_INCLUDE_DIR})

set(CMAKE_CXX_FLAGS "-g -Wall")

add_executable(OpenGL Main.cpp)

target_link_libraries(OpenGL ${GLUT_LIBRARY} ${OPENGL_LIBRARY})

可能出现的错误

if you use `-fpermissive’, G++ will accept your code, but allowing the use of an undeclared name is deprecated

解决方法 add_compile_options(-fpermissive -std=c++11)

undefined reference to symbol …

这类错误通常是链接.so, .a文件失败产生的，但是都会给出具体是哪个lib没有：”/lib/x86_64-linux-gnu/libz.so: error adding symbols: DSO missing from command line”

解决方法，

1.用各种方法把libz.so放到指定目录下(方法太多了自行查询)

2.若目录下已有libz.so，则在target_link_libraries中加上该libz.so( ${PROJECT_SOURCE_DIR}//libz.so)