pkg/55647: pkgsrc wrappers can not deal with mixed clang/gcc build requirements

[martin%NetBSD.org@localhost]

>Number:         55647
>Category:       pkg
>Synopsis:       pkgsrc wrappers can not deal with mixed clang/gcc build requirements
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Sep 09 10:50:00 +0000 2020
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.72
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD whoever-brings-the-night.aprisoft.de 9.99.72 NetBSD 9.99.72 (WHOEVER) #348: Tue Sep 8 14:41:04 CEST 2020 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/sparc64/compile/WHOEVER sparc64
Architecture: sparc64
Machine: sparc64
>Description:

Some pkgs, notably www/firefox, require both gcc and clang/clang++ to
compile, for reasons beyound me (as if rustc would not be enough of a
nuisance) if trying to build with gcc.

Pkgsrc toolchain wrappers seem not to be able to provide this environment.

The pkg hacks around it by forcing a full clang build.
But: clang is broken on sparc64, so this shoots itself in the foot and prevents
the build.

>How-To-Repeat:
n/a

>Fix:
n/a