在ubutun1804 系统、qtcreator中复现SLAM3出现问题,具体如下：
1、已经通过cmake已经完成slam3的复现，成功验证，准备在qtcreator中再次复现一遍（结果出问题）；
2、在把所有的头文件、源文件以及所需要连接的库全部连接后，编译报错：pangolin库编译出错，各种未定以的函数。如下所示：
/usr/local/include/pangolin/gl/gl.hpp:579: error: ‘glGenFramebuffersEXT’ was not declared in this scope
glGenFramebuffersEXT(1, &fbid);
^~~~~~~~~~~~~~~~~~~~
/usr/local/include/pangolin/gl/gl.hpp:523: error: ‘glDeleteRenderbuffersEXT’ was not declared in this scope
glDeleteRenderbuffersEXT(1, &rbid);
^~~~~~~~~~~~~~~~~~~~~~~~
差不多1200多个，主要集中在gl.hpp和glsl.h这两个文件中。
我的解答思路和尝试过的方法 ：
1、在Qt工程pro文件中链接pangolin编译产生的.so文件，如下所示：
unix:!macx: LIBS += -L$$PWD/../../../../../usr/local/lib/ -lpango_windowing
INCLUDEPATH += $$PWD/../../../../../usr/local/include
DEPENDPATH += $$PWD/../../../../../usr/local/include
unix:!macx: LIBS += -L$$PWD/../../../../../usr/local/lib/ -lpango_video
INCLUDEPATH += $$PWD/../../../../../usr/local/include
DEPENDPATH += $$PWD/../../../../../usr/local/include
unix:!macx: LIBS += -L$$PWD/../../../../../usr/local/lib/ -lpango_vars
INCLUDEPATH += $$PWD/../../../../../usr/local/include
DEPENDPATH += $$PWD/../../../../../usr/local/include
结果还是无效。
2、针对的pangolin库的 卸载再安装，结果还是一样。
1.检查下pangolin编译的版本与qt构建选择的版本是否一致比如都需要是debug或release，这种情况下也会出现未定义的问题。
2.检查下这个库的环境变量是否配置正确。
希望对您有用
根据错误提示，编译时找不到pangolin接口的声明。
pro里边的配置，改成如下这样试试呢。
unix:!macx: CONFIG(debug, debug|release): LIBS += -L/usr/local/lib/ -lpango_windowing
else:unix:!macx: CONFIG(release, debug|release): LIBS += -L/usr/local/lib/ -lpango_windowing
INCLUDEPATH += $$PWD/usr/local/include
DEPENDPATH += $$PWD/usr/local/include
unix:!macx: CONFIG(debug, debug|release): LIBS += -L/usr/local/lib/ -lpango_video
else:unix:!macx: CONFIG(release, debug|release): LIBS += -L/usr/local/lib/ -lpango_video
INCLUDEPATH += $$PWD/usr/local/include
DEPENDPATH += $$PWD/usr/local/include
unix:!macx: CONFIG(debug, debug|release): LIBS += -L/usr/local/lib/ -lpango_vars
else:unix:!macx: CONFIG(release, debug|release): LIBS += -L/usr/local/lib/ -lpango_vars
INCLUDEPATH += $$PWD/usr/local/include
DEPENDPATH += $$PWD/usr/local/include