second issue building on Cygwin
The Cygwin headers are very picky and the "-std=c++14" cause some not
standard calls to fail compilation due to the reduced scope.
The solution is to remove the "-std=c++14" or to replace with "-std=gnu++14"
Only two cases showed up in my build:
Dear Developers,
I am the Cygwin package maintainer for Lilypond and Guile
latest 2.22.2 builds without issue.
On the first tentative to build/package 2.23.x for Cygwin I hit two
different problems so I will report them separately
first one is almost immediate
