Re: MSYS2 build slow

[Gregory Nutt]

For MSYS2 on my i7-3770 it's (every tests with jobs enabled):
# make distclean
# tools/configure.sh stm32f4discovery/nsh
You really should specific -g on the configure.sh command line. 
Otherwise, the system will assume you are building for Cygwin. There are 
only a few differences between Cygwin and MSYS2, but though you should know.