Merge branch 'arc-dev' into arc-staging

Author: anthony-kolesov

README.md

@@ -85,8 +85,8 @@ Latest stable release from https://kernel.org/ is recommended, and only
 versions >= 3.9 are supported. Linux sources should be located in the directory
 named `linux` that is the sibling of this `toolchain` directory. For example:
 
-    $ wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.7.2.tar.xz
-    $ tar xaf linux-4.7.2.tar.xz --transform=s/linux-4.7.2/linux/
+    $ wget https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.8.2.tar.xz
+    $ tar xaf linux-4.8.2.tar.xz --transform=s/linux-4.8.2/linux/
 
 ### Using Git repositories
 
@@ -127,7 +127,7 @@ config/arc-dev.sh file, which at the moment of this writing are:
 * gdb - arc-2016.09-gdb
 * newlib - arc-2016.09
 * uClibc - arc-2016.09
-* Linux - linux-4.7.y
+* Linux - linux-4.8.y
 
 Note, however that if `build-all.sh` will try to checkout repositories to their
 latest state, which is a default behaviour, then it will anyway fetch

build-uclibc.sh

@@ -666,8 +666,16 @@ if [ $DO_NATIVE_GDB = yes ]; then
 
     build_dir_init native_gdb
 
+    # Due to STAR 9001066513 GDB crashes when throwing an exception.  Due to a
+    # poor design GDB uses exceptions as a part of a normal execution flow to
+    # verify user input (for example it throws exception when file path is
+    # invalid or when typed symbol doesn't exist).  Therefore for 2016.09
+    # release it is required to disable build of GDB as a C++ application.
+    # This will not work for future releases, because GDB will stop supporting
+    # C builds.
     config_path=$(calcConfigPath "${ARC_GNU}")/gdb
     configure_for_arc "$config_path" $triplet \
+	--disable-build-with-cxx \
 	--disable-gas --disable-ld --disable-binutils
     make_target building
 
@@ -681,6 +689,7 @@ else
     build_dir_init gdbserver
     # Static options are same as when gdbserver is configured by the top-level
     # configure script.
+    # See commment for native GDB about build-with-cxx.
     config_path=$(calcConfigPath "${ARC_GNU}")/gdb/gdb/gdbserver
     LDFLAGS="-static-libstdc++ -static-libgcc" \
 	configure_for_arc "$config_path" $triplet --disable-build-with-cxx

config/arc-dev.sh

@@ -3,4 +3,4 @@ gcc=gcc:arc-6.x-dev
 gdb=gdb:arc-2016.09-gdb
 newlib=newlib:arc-2016.09
 uclibc=uClibc:arc-2016.09
-linux=linux:linux-4.7.y
+linux=linux:linux-4.8.y

doc/linux/kernel-build.rst

@@ -17,11 +17,15 @@ Prerequisites
 -------------
 
 * Host OS:
+
   * RHEL 6 or later
   * Ubuntu 14.04 LTS or later
+
 * GNU tool chain for ARC:
+
   * 2014.12 or later for Linux for ARC HS
   * 4.8 or later for Linux for ARC 700
+
 * make version at least 3.81
 * rsync version at least 3.0
 * git
@@ -303,3 +307,33 @@ Now it is possible to mount some NFS share and run applications from it::
     [arclinux] # mount -t nfs public-nfs:/home/arc_user/pub /mnt
     [arclinux] # /mnt/hello_world
 
+
+Linux for AXS103 SDP
+--------------------
+
+Build process using Buildroot is the same as for standalone nSIM. Buildroot
+defconfig is::
+
+    BR2_arcle=y
+    BR2_archs38=y
+    BR2_TOOLCHAIN_EXTERNAL=y
+    BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
+    BR2_TOOLCHAIN_EXTERNAL_URL="http://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/releases/download/arc-2016.09/arc_gnu_2016.09_prebuilt_uclibc_le_archs_linux_install.tar.gz"
+    BR2_TOOLCHAIN_EXTERNAL_GCC_6=y
+    BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_8=y
+    BR2_TOOLCHAIN_EXTERNAL_LOCALE=y
+    BR2_TOOLCHAIN_EXTERNAL_HAS_SSP=y
+    BR2_TOOLCHAIN_EXTERNAL_INET_RPC=y
+    BR2_TOOLCHAIN_EXTERNAL_CXX=y
+    BR2_LINUX_KERNEL=y
+    BR2_LINUX_KERNEL_DEFCONFIG="axs103_smp"
+    BR2_PACKAGE_GDB=y
+    BR2_PACKAGE_GDB_SERVER=y
+    BR2_PACKAGE_GDB_DEBUGGER=y
+    BR2_TARGET_ROOTFS_INITRAMFS=y
+    # BR2_TARGET_ROOTFS_TAR is not set
+
+This defconfig will create a uImage file instead of vmlinux. Please refer to
+`ARC Linux wiki
+<https://github.com/foss-for-synopsys-dwc-arc-processors/linux/wiki/Getting-Started-with-Linux-on-ARC-AXS103-Software-Development-Platform-(SDP)>`
+for more details on using u-boot with AXS103.