Interest in a printf-gnu module for printf("%m")?

[Eric Blake]

I found myself fixing a project that used printf("%m") to work on BSD. 
That particular project is incompatible with GPL, so it would not 
benefit from gnulib, but it made me wonder if there is any interest in a 
gnulib module that provides guaranteed %m support on all platforms.  It 
doesn't fit in the existing printf-posix module, so we'd have to make a 
new printf-gnu module (presumably GPLv3+, rather than trying to be 
LGPLv2+, as an LGPL project is better off sticking to the bare-bones 
printf-posix).  Or is better to just document in 
doc/posix-functions/*printf*.texi that %m is not portable, and that the 
recommended workaround is to manually pair "%s" with strerror(errno), 
rather than relying on gnulib.

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
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