colm is in Fedora:

    https://apps.fedoraproject.org/packages/colm

My cygport file and patch are attached.

Package files:

http://sanibeltranquility.com/cygwin/x86/release/colm/colm-0.13.0.6-1-src.tar.xz
http://sanibeltranquility.com/cygwin/x86/release/colm/colm-0.13.0.6-1.tar.xz
http://sanibeltranquility.com/cygwin/x86/release/colm/colm-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86/release/colm/libcolm-devel/libcolm-devel-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86/release/colm/libcolm-devel/libcolm-devel-0.13.0.6-1.tar.xz
http://sanibeltranquility.com/cygwin/x86/release/colm/colm-debuginfo/colm-debuginfo-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86/release/colm/colm-debuginfo/colm-debuginfo-0.13.0.6-1.tar.xz
http://sanibeltranquility.com/cygwin/x86/release/colm/libcolm0.13.0.6/libcolm0.13.0.6-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86/release/colm/libcolm0.13.0.6/libcolm0.13.0.6-0.13.0.6-1.tar.xz
http://sanibeltranquility.com/cygwin/x86_64/release/colm/colm-0.13.0.6-1-src.tar.xz
http://sanibeltranquility.com/cygwin/x86_64/release/colm/colm-0.13.0.6-1.tar.xz
http://sanibeltranquility.com/cygwin/x86_64/release/colm/colm-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86_64/release/colm/libcolm-devel/libcolm-devel-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86_64/release/colm/libcolm-devel/libcolm-devel-0.13.0.6-1.tar.xz
http://sanibeltranquility.com/cygwin/x86_64/release/colm/colm-debuginfo/colm-debuginfo-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86_64/release/colm/colm-debuginfo/colm-debuginfo-0.13.0.6-1.tar.xz
http://sanibeltranquility.com/cygwin/x86_64/release/colm/libcolm0.13.0.6/libcolm0.13.0.6-0.13.0.6-1.hint
http://sanibeltranquility.com/cygwin/x86_64/release/colm/libcolm0.13.0.6/libcolm0.13.0.6-0.13.0.6-1.tar.xz

License: MIT and LGPLv2+

Ken