(patch) add USE_TOOLS=tar:build to lang/gcc5

[Matthias Ferdinand <mf+ml.pkgsrc-users%netzwerkagentursaarland.de@localhost>]

Hi,

on some buildhosts I use
    TOOLS_PLATFORM.tar= # empty
and others to make pkgsrc as self-reliant as possible.

lang/gcc5 cannot extract its libraries on hosts with this setting:

    ...
    ===> Cleaning for mpfr-3.1.3
    /bin/mv /opt/pkgsrc/work/pkgsrc/lang/gcc5/default/gcc-5.2.0/mpfr-* /opt/pkgsrc/work/pkgsrc/lang/gcc5/default/gcc-5.2.0/mpfr
=>  -jxf /opt/pkgsrc/distfiles/isl-0.14.tar.bz2 -C /opt/pkgsrc/work/pkgsrc/lang/gcc5/default/gcc-5.2.0
    bmake[1]: exec(-jxf) failed (No such file or directory)
    *** Error code 1

Attached patch adds "tar:build" to USE_TOOLS which fixes this.

Regards
Matthias Ferdinand

--- lang/gcc5/Makefile.orig	2015-07-28 05:37:47.000000000 +0200
+++ lang/gcc5/Makefile	2015-08-12 19:10:10.000000000 +0200
@@ -24,7 +24,7 @@
 NOT_FOR_PLATFORM=	Interix-*-*
 
 USE_LANGUAGES=	c c++
-USE_TOOLS+=		gmake makeinfo sed:run
+USE_TOOLS+=		gmake makeinfo sed:run tar:build
 
 GNU_CONFIGURE=		yes
 ## Build outside ${WRKSRC}