gtkmm30 fails to build under 10.3

[scratch65535 at att.net]

[Default] On Thu, 17 Aug 2017 07:12:36 -0400, I wrote:

>[Default] On Thu, 17 Aug 2017 10:45:58 +0200, Jan Beich
><jbeich at FreeBSD.org> wrote:
>
>><scratch65535 at att.net> writes:
>>
>>> [Default] On Wed, 16 Aug 2017 22:46:44 +0200, Jan Beich
>>> <jbeich at FreeBSD.org> wrote:
>>>
>>>><scratch65535 at att.net> writes:
>>>>
>>>>> Package dependency requirement 'giomm-2.4 >= 2.49.1' could not be
>>>>> satisfied.
>>
>>$ pkg which -o /usr/local/libdata/pkgconfig/giomm-2.4.pc
>>/usr/local/libdata/pkgconfig/giomm-2.4.pc was installed by package devel/glibmm
>
>We might be talking at crossed purposes, here.  The makefile did
>indeed install 2.4, but that's not 2.49.1 (note that it's "2.49"
>not "2.4.9").  2.49 is not visible in my
>freshly-updated-just-before-these-build-attempts ports tree. .
>
>The version number seems goofed up.  Why would it ever imagine
>that 2.4 is 2.49?   There doesn't seem to be a rule that version
>numbers are truncated to 1 digit after the decimal point. 

Okay, I'd not noticed til now that there does seem to be a
truncate convention, which seems counterproductive t'me.  So what
looks like v2.4 could be v2.4 or v2.49 or even, theoretically,
v2.49999.  Not much information in a single digit.

But in any event it's not 2.49, and the "2.4" I installed is the
only "2.4" in the ports tree.  Reinstalling won't help.