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:
gcc45: use a more reasonable specfile for netbsd
fix some build errors I see (using same patches as lang/gcc46)

build still failing at:
unwind-dw2.c:1452:5: error: unknown field 'ptm_ceiling' specified in initializer
unwind-dw2.c:1452:5: warning: missing braces around initializer
unwind-dw2.c:1452:5: warning: (near initialization for \ 
'once_regsizes.pto_mutex.<anonymous>')

Log message:
Bump PKGREVISION for perl-5.24.0 for everything mentioning perl.

Log message:
Use OPSYSVARS.

Log message:
Attempt to bring sanity to how ABI and MACHINE_ARCH are set.

Previously there were at least 5 different ways MACHINE_ARCH could be set,
some statically and some at run time, and in many cases these settings
differed, leading to issues at pkg_add time where there was conflict
between the setting encoded into the package and that used by pkg_install.

Instead, move to a single source of truth where the correct value based on
the host and the chosen (or default) ABI is determined in the bootstrap
script.  The value can still be overridden in mk.conf if necessary, e.g.
for cross-compiling.

ABI is now set by default and if unset a default is calculated based on
MACHINE_ARCH.  This fixes some OS, e.g. Linux, where the wrong default was
previously chosen.

As a result of the refactoring there is no need for LOWER_ARCH, with
references to it replaced by MACHINE_ARCH.  SPARC_TARGET_ARCH is also
removed.

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:
Add SHA512 digests for distfiles for lang category

Problems found with existing digests:
	Package nhc98 distfile nhc98src-1.22.tar.gz
	a8adc8f22371998ee0657bc0e01058a57d876abc [recorded]
	81975fcb5f1dda5efeaabc30ce8c6dceae55e591 [calculated]

Problems found locating distfiles:
	Package gcc-aux: missing distfile ada-bootstrap.i386.dragonfly.36A.tar.bz2
	Package gcc-aux: missing distfile ada-bootstrap.i386.freebsd.84.tar.bz2
	Package gcc-aux: missing distfile ada-bootstrap.x86_64.dragonfly.36A.tar.bz2
	Package gcc-aux: missing distfile ada-bootstrap.x86_64.freebsd.84.tar.bz2
	Package gcc-aux: missing distfile ada-bootstrap.x86_64.solaris.511.tar.bz2
	Package gcc5-aux: missing distfile ada-bootstrap.i386.dragonfly.36A.tar.bz2
	Package gcc5-aux: missing distfile ada-bootstrap.i386.freebsd.84.tar.bz2
	Package gcc5-aux: missing distfile ada-bootstrap.x86_64.dragonfly.36A.tar.bz2
	Package gcc5-aux: missing distfile ada-bootstrap.x86_64.freebsd.84.tar.bz2
	Package gcc5-aux: missing distfile ada-bootstrap.x86_64.solaris.511.tar.bz2
	Package ghc7: missing distfile ghc-7.6.3-boot-i386-unknown-freebsd.tar.xz
	Package icc11: missing distfile l_cproc_p_11.1.080.tgz
	Package jini: missing distfile jini-1_2_1_001-src.zip
	Package oo2c: missing distfile oo2c_32-2.0.11.tar.bz2
	Package openjdk7: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-freebsd-10-amd64-20150301.tar.xz
	Package openjdk7: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-5-i386-20150301.tar.xz
	Package openjdk7: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-6-i386-20150301.tar.xz
	Package openjdk7: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-7-earmv6hf-20150306.tar.xz
	Package openjdk7: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-7-sparc64-20150301.tar.xz
	Package openjdk7: missing distfile \ 
openjdk7/bootstrap-jdk7u60-bin-dragonfly-3.8-amd64-20140719.tar.bz2
	Package openjdk8: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-freebsd-10-amd64-20150301.tar.xz
	Package openjdk8: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-5-i386-20150301.tar.xz
	Package openjdk8: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-6-i386-20150301.tar.xz
	Package openjdk8: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-7-earmv6hf-20150306.tar.xz
	Package openjdk8: missing distfile \ 
openjdk7/bootstrap-jdk-1.7.76-netbsd-7-sparc64-20150301.tar.xz
	Package openjdk8: missing distfile \ 
openjdk7/bootstrap-jdk7u60-bin-dragonfly-3.8-amd64-20140719.tar.bz2
	Package oracle-jdk8: missing distfile jdk-8u60-linux-i586.tar.gz
	Package oracle-jdk8: missing distfile jdk-8u60-solaris-x64.tar.gz
	Package oracle-jre8: missing distfile jre-8u60-linux-i586.tar.gz
	Package oracle-jre8: missing distfile jre-8u60-solaris-x64.tar.gz
	Package sun-jdk6: missing distfile jdk-6u45-linux-i586.bin
	Package sun-jdk6: missing distfile jdk-6u45-solaris-i586.sh
	Package sun-jdk7: missing distfile jdk-7u72-linux-i586.tar.gz
	Package sun-jdk7: missing distfile jdk-7u72-solaris-i586.tar.gz
	Package sun-jre6: missing distfile jce_policy-6.zip
	Package sun-jre6: missing distfile jre-6u45-linux-x64.bin
	Package sun-jre6: missing distfile jre-6u45-solaris-x64.sh
	Package sun-jre7: missing distfile jre-7u72-linux-i586.tar.gz
	Package sun-jre7: missing distfile jre-7u72-solaris-i586.tar.gz

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Log message:
Explicitly disable multilib on 64-bit Linux if the requisite headers aren't
available.