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+2016/09/30 - Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
+  - Add Release 6 support
+
+2012/03/30 - Mark Hatle <mark.hatle@windriver.com>
+  - Initial Version
+
+MIPS currently defines 12 ABIs.  Combinations of:
+ *) Big/Little Endian
+ *) Hardware/Software Floating Point
+ *) o32, n32, n64 ABI
+
+Release 6 of the ISA is a major revision and doesn't build up on previous
+releases of the ISA.
+
+For more details about tuples, check https://wiki.debian.org/Multiarch/Tuples
+
+TUNE_ARCH, the GNU canonical arch, is defined as:
+
+"mips${MIPSPKGSFX_32R6}${MIPSPKGSFX_64R6}${MIPSPKGSFX_BYTE}${MIPSPKGSFX_R6}${MIPSPKGSFX_ENDIAN}"
+
+The package arch is defined in such a way to generated a standard naming
+scheme.  The scheme is: <mips variant>[-nf][-n32]
+
+TUNE_PKGARCH is defined as:
+
+${MIPSPKGSFX_VARIANT_tune-${DEFAULTTUNE}}${MIPSPKGSFX_FPU}${MIPSPKGSFX_ABI}
+
+The following is a list of MIPS specific variables:
+
+MIPSPKGSFX_BYTE - This is defined as either blank and "64" for MIPS64 CPUs.
+
+MIPSPKGSFX_ENDIAN - For bigendian hardware this is blank, otherwise it's
+defined as "el".
+
+MIPSPKGSFX_ENDIAN2 - For bigendian hardware this is "eb", otherwise it's
+defined as "el".
+
+MIPSPKGSFX_VARIANT_tune-<tune> - In the default tunings it is set to the
+same value as TUNE_ARCH.  In custom, optimized tunings, the value should
+be modified to more precisely describe the tuning.
+
+MIPSPKGSFX_FPU - The value is set to "" or "-nf", where "-nf" indicates 
+that the tune is using a non-floating point ABI.
+
+MIPSPKGSFX_ABI - This is used to specify an alternative ABI when the previous
+values are not enough to distringuish the package.  "-n32" is added when
+building for N32 ABI.
+
+MIPSPKGSFX_R6 - This is used to specify the presence of release 6.
+"r6" is added in the tuple for release 6 of the isa.
+
+MIPSPKGSFX_64R6 - This is used to specify "isa" in the tuple.
+Release 6 onwards we use "mipsisa64" instead of just "mips64".
+
+MIPSPKGSFX_32R6 -  This is used to specify "isa32" in the tuple.
+Release 6 onwards we use "mipsisa32" instead of just "mips".