Log message:
Remove gcc45,46,47 and libs as discussed in pkgsrc-users
GCC_REQD for these versions now resolves to gcc48 due to a previous commit.

Please file a bug report if you are having trouble with GCC 4.8.

Log message:
gcc46-libs: bump PKGREVISION further than gcc46

Log message:
Remove mk/find-prefix.mk usage from the lang category.

The find-prefix infrastructure was required in a pkgviews world where
packages installed from pkgsrc could have different installation
prefixes, and this was a way for a dependency prefix to be determined.

Now that pkgviews has been removed there is no longer any need for the
overhead of this infrastructure.  Instead we use BUILDLINK_PREFIX.pkg
for dependencies pulled in via buildlink, or LOCALBASE/PREFIX where the
dependency is coming from pkgsrc.

Provides a reasonable performance win due to the reduction of `pkg_info
-qp` calls, some of which were redundant anyway as they were duplicating
the same information provided by BUILDLINK_PREFIX.pkg.

Log message:
Support the override libgcc specs for the cwrappers case.

Log message:
Import gcc46-libs-4.6.4nb4 as lang/gcc46-libs.

The GNU Compiler Collection (GCC) includes front ends for C, C++, Objective-C,
Fortran, and Go, as well as libraries for these languages (libstdc++,
libgfortran, ...).

To select gcc46-libs over gcc46, this package's PKGREVISION should start
from 4 (gcc46's 3 + 1).