configure.sh: Remove armv6-darwin target.

- iOS SDKs no longer ship with armv6 support.
- Our minimum iOS version means all target devices have neon.
- Remove armv6 darwin LD workaround.
  - This removes a TODO.

Change-Id: I2fcb5b82c96213364275475be021c7dd8459d5c0

README

@@ -47,7 +47,6 @@ COMPILING THE APPLICATIONS/LIBRARIES:
   --help output of the configure script. As of this writing, the list of
   available targets is:
 
-    armv6-darwin-gcc
     armv6-linux-rvct
     armv6-linux-gcc
     armv6-none-rvct

build/make/configure.sh

@@ -1018,18 +1018,7 @@ EOF
           NM="$(${XCRUN_FIND} nm)"
           RANLIB="$(${XCRUN_FIND} ranlib)"
           AS_SFX=.s
-
-          # Special handling of ld for armv6 because libclang_rt.ios.a does
-          # not contain armv6 support in Apple's clang package:
-          #   Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn).
-          # TODO(tomfinegan): Remove this. Our minimum iOS version (6.0)
-          # renders support for armv6 unnecessary because the 3GS and up
-          # support neon.
-          if [ "${tgt_isa}" = "armv6" ]; then
-            LD="$(${XCRUN_FIND} ld)"
-          else
-            LD="${CXX:-$(${XCRUN_FIND} ld)}"
-          fi
+          LD="${CXX:-$(${XCRUN_FIND} ld)}"
 
           # ASFLAGS is written here instead of using check_add_asflags
           # because we need to overwrite all of ASFLAGS and purge the

configure

@@ -98,7 +98,6 @@ EOF
 
 # all_platforms is a list of all supported target platforms. Maintain
 # alphabetically by architecture, generic-gnu last.
-all_platforms="${all_platforms} armv6-darwin-gcc"
 all_platforms="${all_platforms} armv6-linux-rvct"
 all_platforms="${all_platforms} armv6-linux-gcc"
 all_platforms="${all_platforms} armv6-none-rvct"