I'm trying to install gmapping package from github https://github.com/nii2121/gmapping/blob/master/docs/Instructions.txt and after I run
./configure
It turns out to be
No 'CXX' environment variable found, using g++.
No 'CC' environment variable found, using gcc.
Using C++ compiler: g++
Using C compiler: gcc
Checking for Qt 3.x ...
*** Qt 3.x not found please set QT_INCLUDE, QT_LIB, MOC by hand
Does anyone have idea? Thanks in advance!