games/eduke32: update to r6180, add patch to build with Clang and option to build with GCC

[ultima]

Summary

• Updated to 20170614 (r6180)
• Added non-default option GCC

PR\: 220039
Sumitted by\: Piotr Kubaj <[e-mail]> (maintainer)
Reviewed by\: lifanov (mentor), matthew (mentor)
Approved by\: lifanov (mentor), matthew (mentor)
Differential Revision\: https://reviews.freebsd.org/DXXXXX

Test Plan

portlint:
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
0 fatal errors and 1 warning found.

poudriere:
103i386
103amd64
110i386
110amd64
12i386
12amd64

[mat]

games/eduke32/Makefile

54

GCC_USE= gcc=yes

55

lang/gcc does not provide libstdc++, it does not provide anything, it is a metaport, so, this feels strange, the framework should warn you this is bad.
Also, USE_GCC already sets a build and run-time depends on gcc.

[ultima]

Retested with poudriere +gcc option, success.

[lifanov]

What's the purpose of the GCC option? The ports framework already allows the user to override the default compiler.

[ultima]

In D11253#232962, @lifanov wrote:

What's the purpose of the GCC option? The ports framework already allows the user to override the default compiler.

That is a great point I didn't even consider. I'll pass your query to the maintainer and reply back.

[ultima]

In D11253#232962, @lifanov wrote:

What's the purpose of the GCC option? The ports framework already allows the user to override the default compiler.

Actually it must be for ease of use. To set a different compiler in make.conf option, it would override for all ports unless adding something like
.if !empty(.CURDIR:M/usr/ports/games/eduke32/*) && exists(/usr/local/bin/gcc47)
CC=gcc47
CXX=g++47
CPP=cpp47
.endif

The option make it a simple tick.

[ultima]

In D11253#232962, @lifanov wrote:

What's the purpose of the GCC option? The ports framework already allows the user to override the default compiler.

This is the note from maintainer.
The port right now requires GCC to build. This patch makes it possible to build with Clang and also adds an option to build with GCC, for increased performance (building with Clang requires not using LTO). Building with Clang is enabled by default.

[lifanov]

Hmm, it seems to me that we have a consistent way to select GCC, including for specific ports, as you noted earlier.
I personally think that this is not a good idea, but if the maintainer wants to keep this option around, go ahead.