vsnprintf error compiling

[Kizito Porta Balanyà]

Hello,

I'm trying to build the new version of monit (5.14) in cygwin, but I
get the following error executing configure:

autoreconf -i -f && automake -acf && ./configure

checking vsnprintf is c99 conformant... configure: error: in
`/tmp/monit-5.14/libmonit':
configure: error: vsnprintf does not conform to c99

Is cygwin GCC c99 conformant? I'm totally lost, perhaps what I say has
no sense.

Any help is welcome.

Thanks a lot for your time.

Regards.

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