[toolchain] Removing default build of gcc

[Gerald Pfeifer]

On Sat, 26 Jan 2013, Konstantin Belousov wrote:
> Ports should use port-provided compiler, and be untangled from the base
> toolchain. I believe that forcing ports committers to port 20K+ packages
> to clang is a waste of the FreeBSD resources and is is destined to fail
> despite the efforts.

I agree that using a ports-provided compiler sounds like a good
idea.  (I am not sure that porting everything to clang will fail,
though.)

Anyway, I'll do what I can to support flexibility on the ports
side, and with the patch below we should now able to support a
world without GCC in the base.

Please let me know if there is more you need or problems still
in place.

Gerald



Author: gerald
Date: Sun Mar  3 03:21:29 2013
New Revision: 313323
URL: http://svnweb.freebsd.org/changeset/ports/313323

Log:
  Do not just rely on the version number of FreeBSD in deciding whether
  a certain version of GCC is in the base, but also check the existence
  of /usr/bin/gcc.
  
  This unbreaks systems where GCC is not built as part of the world, and
  instead relies on versions of GCC in the Ports Collection there.
  
  PR:		175252
  Submitted by:	Yamaya Takashi <yamayan at kbh.biglobe.ne.jp>

Modified:
  head/Mk/bsd.gcc.mk

Modified: head/Mk/bsd.gcc.mk
==============================================================================
--- head/Mk/bsd.gcc.mk	Sun Mar  3 02:51:25 2013	(r313322)
+++ head/Mk/bsd.gcc.mk	Sun Mar  3 03:21:29 2013	(r313323)
@@ -150,7 +150,9 @@ IGNORE=	Unknown version of GCC specified
 _GCC_FOUND${v}=	port
 . endif
 . if ${OSVERSION} >= ${_GCCVERSION_${v}_L} && ${OSVERSION} < ${_GCCVERSION_${v}_R}
+.  if exists(/usr/bin/gcc)
 _GCC_FOUND${v}:=	base
+.  endif
 . endif
 .endfor
 
@@ -194,7 +196,7 @@ _USE_GCC:=	${GCC_DEFAULT_VERSION}
 # dependencies, CC, CXX, CPP, and flags.
 .for v in ${GCCVERSIONS}
 . if ${_USE_GCC} == ${_GCCVERSION_${v}_V}
-.  if ${OSVERSION} < ${_GCCVERSION_${v}_L} || ${OSVERSION} > ${_GCCVERSION_${v}_R}
+.  if ${OSVERSION} < ${_GCCVERSION_${v}_L} || ${OSVERSION} > ${_GCCVERSION_${v}_R} || !exists(/usr/bin/gcc)
 V:=			${_GCCVERSION_${v}_V:S/.//}
 _GCC_PORT_DEPENDS:=	gcc${V}
 .   if ${_USE_GCC} == ${GCC_DEFAULT_VERSION}
@@ -219,7 +221,7 @@ FFLAGS+=		-Wl,-rpath=${_GCC_RUNTIME}
 # ever telling us; to be fixed.
 _GCC_BUILD_DEPENDS:=	${_GCC_PORT_DEPENDS}
 .   endif # ${_USE_GCC} != 3.4
-.  else # ${OSVERSION} < ${_GCCVERSION_${v}_L} || ${OSVERSION} > ${_GCCVERSION_${v}_R}
+.  else # Use GCC in base.
 CC:=			gcc
 CXX:=			g++
 .   if exists(/usr/bin/gcpp)
@@ -227,7 +229,7 @@ CPP:=			gcpp
 .   else
 CPP:=			cpp
 .   endif
-.  endif # ${OSVERSION} < ${_GCCVERSION_${v}_L} || ${OSVERSION} > ${_GCCVERSION_${v}_R}
+.  endif # Use GCC in base.
 . endif # ${_USE_GCC} == ${_GCCVERSION_${v}_V}
 .endfor
 .undef V