Review of gcc47 changes

["Jonathan Perkin" <jperkin%joyent.com@localhost>]

Hi,

I have some changes to gcc47 I'd like a second pair of eyes on.  We
are using these internally, and I'd like to get them integrated.

They are not currently on a separate branch, and instead are lumped
into our 'miscfix' branch:

  
https://github.com/joyent/pkgsrc/compare/trunk...joyent;feature;miscfix;trunk#L19L3
  
Changes are:

  * gcc47-libs/Makefile - include the GCC *.o files, this is so that
    we can depend upon the GCC runtime package in lang/clang, which
    requires crtbegin.o et al.  This should hopefully make clang
    useful on various illumos platforms.

  * gcc47-libs/buildlink.mk - remove check for GCC47_BUILDLINK3_MK,
    this conflicts with the use case of using gcc47 from the current
    pkgsrc $PREFIX but still wanting to use USE_PKGSRC_GCC_RUNTIME.

  * gcc47-libs/buildlink.mk - re-order rpath so that the runtime
    directory comes first.  

  * gcc47/ALTERNATIVES - ignore this hunk, internal-only for now.

  * gcc47/patches/patch-gcc_Makefile.in (and related) - use
    GCC_TARGET_MACHINE in preference to $(target_noncanonical) so that
    any user preferences are taken into account, and make it first in
    the search order, so that REQUIRES lines are correct when using
    gcc47 from $PREFIX but still wanting USE_PKGSRC_GCC_RUNTIME.

Thanks,

-- 
Jonathan Perkin  -  Joyent, Inc.  -  www.joyent.com