This set of compilers and tools using following licenses:


Software		Version		License
-------------------------------------------------------
GNU gcc			7.1.0		GPLv2,GPLv3
GNU binutils		2.28		GPLv2,GPLv3
GNU GMP			6.1.2		GPLv2,GPLv3
GNU MPFR		3.1.5		GPLv2,GPLv3
isl			0.16.1		MIT (MIT License)
gdb			7.12		GPLv2,GPLv3
bzip2			1.0.6		BSD-style license
zlib			1.2.11		zlib license (https://www.zlib.net/zlib_license.html)
mingw64			5.0.2		ZPL v2.1 (Zope Public License Version 2.1)