gnu: isl: Add support for aarch64.

* gnu/packages/gcc.scm (isl)[source]: Add patch.
* gnu/packages/patches/isl-0.11.1-aarch64-support.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.

gnu/local.mk

@@ -598,6 +598,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/ilmbase-fix-tests.patch			\
   %D%/packages/patches/inkscape-drop-wait-for-targets.patch	\
   %D%/packages/patches/irrlicht-mesa-10.patch			\
+  %D%/packages/patches/isl-0.11.1-aarch64-support.patch	\
   %D%/packages/patches/jansson-CVE-2016-4425.patch		\
   %D%/packages/patches/jasper-CVE-2007-2721.patch		\
   %D%/packages/patches/jasper-CVE-2008-3520.patch		\

gnu/packages/gcc.scm

@@ -718,7 +718,8 @@ as the 'native-search-paths' field."
                                        name "-" version ".tar.gz")))
              (sha256
               (base32
-               "13d9cqa5rzhbjq0xf0b2dyxag7pqa72xj9dhsa03m8ccr1a4npq9"))))
+               "13d9cqa5rzhbjq0xf0b2dyxag7pqa72xj9dhsa03m8ccr1a4npq9"))
+             (patches (search-patches "isl-0.11.1-aarch64-support.patch"))))
     (build-system gnu-build-system)
     (inputs `(("gmp" ,gmp)))
     (home-page "http://isl.gforge.inria.fr/")

gnu/packages/patches/isl-0.11.1-aarch64-support.patch

@@ -0,0 +1,40 @@
+Add aarch64 support to config.guess and config.sub, as would be found if using
+a more recent version of autoconf.
+---
+ config.guess          |    7 +++++++
+ config.sub            |    1 +
+ 2 files changed, 8 insertions(+)
+
+diff --git a/config.guess b/config.guess
+index 40eaed4..baad294 100755
+--- a/config.guess
++++ b/config.guess
+@@ -861,6 +861,13 @@ EOF
+     i*86:Minix:*:*)
+ 	echo ${UNAME_MACHINE}-pc-minix
+ 	exit ;;
++    aarch64:Linux:*:*)
++	echo ${UNAME_MACHINE}-unknown-linux-gnu
++	exit ;;
++    aarch64_be:Linux:*:*)
++	UNAME_MACHINE=aarch64_be
++	echo ${UNAME_MACHINE}-unknown-linux-gnu
++	exit ;;
+     alpha:Linux:*:*)
+ 	case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
+ 	  EV5)   UNAME_MACHINE=alphaev5 ;;
+diff --git a/config.sub b/config.sub
+index 30fdca8..8f5b018 100755
+--- a/config.sub
++++ b/config.sub
+@@ -247,6 +247,7 @@ case $basic_machine in
+ 	# Some are omitted here because they have special meanings below.
+ 	1750a | 580 \
+ 	| a29k \
++	| aarch64 | aarch64_be \
+ 	| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
+ 	| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
+ 	| am33_2.0 \
+-- 
+2.9.0
+