toolchain: add support of ARC architecture

This includes binutils, gcc, gdb and uClibc-ng.

Latest release of ARC gcc (as of today it is "arc-2015.06")
is based on upstream gcc 4.8.4.

Sources are available on GitHub, see:
https://github.com/foss-for-synopsys-dwc-arc-processors/gcc

Latest release of ARC binutils (as of today it is "arc-2015.06")
is based on upstream binutils 2.23.

Sources are available on GitHub, see:
https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb/releases/tag/arc-2015.06

Latest release of ARC GDB (as of today this is "arc-2015.06-gdb")
is based on upstream gdb 7.9.1.

Sources are available on GitHub, see:
https://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb/releases/tag/arc-2015.06-gdb

Note that for binutils and gdb that come from unified git repository
(which is the case for upstream binutils/gdb today) we need to disable
building of gdb in binutils and binutils in gdb hence in binutils:
------>8------
--disable-sim
--disable-gdb
------>8------

and in gdb:
------>8------
--disable-binutils
--disable-ld
--disable-gas
------>8------

Also in gdb we disable sim because if the following breakage while
building with it:
------------>8------------
/usr/bin/env bash ./../common/genmloop.sh -shell /usr/bin/env bash \
        -mono -fast -pbb -switch sem5-switch.c \
        -cpu a5f -infile ./mloop5.in \
        -outfile-suffix 5
unknown option: bash
Makefile:699: recipe for target 'stamp-5mloop' failed
make[7]: *** [stamp-5mloop] Error 1
------------>8------------

Cc: Felix Fietkau <nbd@openwrt.org>
Cc: John Crispin <blogic@openwrt.org>
Cc: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

SVN-Revision: 47438

1 files changed, 33 insertions, 0 deletions

diff --git a/toolchain/gcc/patches/arc-2015.06/100-uclibc-conf.patch b/toolchain/gcc/patches/arc-2015.06/100-uclibc-conf.patch
new file mode 100644
index 0000000000..ff9ad94f62
--- /dev/null
+++ b/toolchain/gcc/patches/arc-2015.06/100-uclibc-conf.patch
@@ -0,0 +1,33 @@
+--- a/contrib/regression/objs-gcc.sh
++++ b/contrib/regression/objs-gcc.sh
+@@ -106,6 +106,10 @@ if [ $H_REAL_TARGET = $H_REAL_HOST -a $H
+  then
+   make all-gdb all-dejagnu all-ld || exit 1
+   make install-gdb install-dejagnu install-ld || exit 1
++elif [ $H_REAL_TARGET = $H_REAL_HOST -a $H_REAL_TARGET = i686-pc-linux-uclibc ]
++ then
++  make all-gdb all-dejagnu all-ld || exit 1
++  make install-gdb install-dejagnu install-ld || exit 1
+ elif [ $H_REAL_TARGET = $H_REAL_HOST ] ; then
+   make bootstrap || exit 1
+   make install || exit 1
+--- a/libjava/classpath/ltconfig
++++ b/libjava/classpath/ltconfig
+@@ -603,7 +603,7 @@ host_os=`echo $host | sed 's/^\([^-]*\)-
+ 
+ # Transform linux* to *-*-linux-gnu*, to support old configure scripts.
+ case $host_os in
+-linux-gnu*) ;;
++linux-gnu*|linux-uclibc*) ;;
+ linux*) host=`echo $host | sed 's/^\(.*-.*-linux\)\(.*\)$/\1-gnu\2/'`
+ esac
+ 
+@@ -1247,7 +1247,7 @@ linux-gnuoldld* | linux-gnuaout* | linux
+   ;;
+ 
+ # This must be Linux ELF.
+-linux-gnu*)
++linux*)
+   version_type=linux
+   need_lib_prefix=no
+   need_version=no