Remove armv6 references from the build system.

We no longer support armv6 and the corresponding
optimized source files have been removed. This
commit removes support for the target and its
media instruction set extensions from the build
system as well.

Once armv6 jobs are removed from the integration
config we can start rejecting --enable/disable-media.

Also reject --enable-edsp.

Change-Id: I547dcc95adb3479d0232396952e72efe2a1343b9

CHANGELOG

 Next Release
   - Incompatible changes:
     The AV1 encoder's default keyframe interval changed to 128 from 9999.
+    Support for armv6 was removed.
 
 2016-04-07 v0.1.0 "AOMedia Codec 1"
   This release is the first Alliance for Open Media codec.

README

@@ -47,9 +47,6 @@ COMPILING THE APPLICATIONS/LIBRARIES:
   --help output of the configure script. As of this writing, the list of
   available targets is:
 
-    armv6-linux-rvct
-    armv6-linux-gcc
-    armv6-none-rvct
     arm64-darwin-gcc
     armv7-android-gcc
     armv7-darwin-gcc

build/make/Android.mk

@@ -43,10 +43,6 @@
 # Configuring with --disable-runtime-cpu-detect --disable-neon \
 #     --disable-neon-asm
 # will remove any NEON dependency.
-
-# To change to building armeabi, run ./libaom/configure again, but with
-# --target=armv6-android-gcc and modify the Application.mk file to
-# set APP_ABI := armeabi
 #
 # Running ndk-build will build libaom and include it in your project.
 #
@@ -61,9 +57,6 @@ ASM_CNV_PATH := $(LOCAL_PATH)/$(ASM_CNV_PATH_LOCAL)
 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
   include $(CONFIG_DIR)libs-armv7-android-gcc.mk
   LOCAL_ARM_MODE := arm
-else ifeq  ($(TARGET_ARCH_ABI),armeabi)
-  include $(CONFIG_DIR)libs-armv6-android-gcc.mk
-  LOCAL_ARM_MODE := arm
 else ifeq  ($(TARGET_ARCH_ABI),arm64-v8a)
   include $(CONFIG_DIR)libs-armv8-android-gcc.mk
   LOCAL_ARM_MODE := arm

build/make/configure.sh

@@ -687,9 +687,6 @@ process_common_toolchain() {
       aarch64*)
         tgt_isa=arm64
         ;;
-      armv6*)
-        tgt_isa=armv6
-        ;;
       armv7*-hardfloat* | armv7*-gnueabihf | arm-*-gnueabihf)
         tgt_isa=armv7
         float_abi=hard
@@ -898,37 +895,6 @@ process_common_toolchain() {
           if disabled neon && enabled neon_asm; then
             die "Disabling neon while keeping neon-asm is not supported"
           fi
-          case ${toolchain} in
-            # Apple iOS SDKs no longer support armv6 as of the version 9
-            # release (coincides with release of Xcode 7). Only enable media
-            # when using earlier SDK releases.
-            *-darwin*)
-              if [ "$(show_darwin_sdk_major_version iphoneos)" -lt 9 ]; then
-                soft_enable media
-              else
-                soft_disable media
-                RTCD_OPTIONS="${RTCD_OPTIONS}--disable-media "
-              fi
-              ;;
-            *)
-              soft_enable media
-              ;;
-          esac
-          ;;
-        armv6)
-          case ${toolchain} in
-            *-darwin*)
-              if [ "$(show_darwin_sdk_major_version iphoneos)" -lt 9 ]; then
-                soft_enable media
-              else
-                die "Your iOS SDK does not support armv6."
-              fi
-              ;;
-            *)
-              soft_enable media
-              ;;
-          esac
-          ;;
       esac
 
       asm_conversion_cmd="cat"

build/make/rtcd.pl

@@ -382,9 +382,6 @@ if ($opts{arch} eq 'x86') {
   }
   close CONFIG_FILE;
   mips;
-} elsif ($opts{arch} eq 'armv6') {
-  @ALL_ARCHS = filter(qw/media/);
-  arm;
 } elsif ($opts{arch} =~ /armv7\w?/) {
   @ALL_ARCHS = filter(qw/neon_asm neon/);
   &require(@REQUIRES);

configure

@@ -94,9 +94,6 @@ EOF
 # alphabetically by architecture, generic-gnu last.
 all_platforms="${all_platforms} arm64-darwin-gcc"
 all_platforms="${all_platforms} arm64-linux-gcc"
-all_platforms="${all_platforms} armv6-linux-rvct"
-all_platforms="${all_platforms} armv6-linux-gcc"
-all_platforms="${all_platforms} armv6-none-rvct"
 all_platforms="${all_platforms} armv7-android-gcc"   #neon Cortex-A8
 all_platforms="${all_platforms} armv7-darwin-gcc"    #neon Cortex-A8
 all_platforms="${all_platforms} armv7-linux-rvct"    #neon Cortex-A8
@@ -224,8 +221,6 @@ ARCH_EXT_LIST_X86="
     avx2
 "
 ARCH_EXT_LIST="
-    edsp
-    media
     neon
     neon_asm