[1/2][AArch64, gas] Support ILP32 triplet aarch64*-linux-gnu_ilp32

[Jiong Wang]

This patch allows AArch64 GAS defaulting to ILP32 if it is configured with
aarch64*-linux-gnu_ilp32.

"md_after_parse_args" is implemented to update ABI into ILP32 if DEFAULT_ARCH is
"aarch64:32".

OK for master?


2017-05-15  Jiong Wang  <jiong.wang@arm.com>

gas/
         * configure.tgt: Set "arch" to "aarch64" if ${cpu} equals "aarch64".
         Recognize the new triplet name aarch64*-linux-gnu_ilp32.
         * configure.ac: Output DEFAULT_ARCH macro for AArch64.
         * configure: Regenerate.
         * config/tc-aarch64.h (aarch64_after_parse_args): New declaration.
         (md_after_parse_args): New define.
         * config/tc-aarch64.c (aarch64_abi_type): New enumeration
         AARCH64_ABI_NONE.
         (DEFAULT_ARCH): New define.
         (aarch64_abi): Set default value to AARCH64_ABI_NONE.
         (aarch64_after_parse_args): New function.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: as.patch
Type: text/x-diff
Size: 4159 bytes
Desc: not available
URL: <https://sourceware.org/pipermail/binutils/attachments/20170515/20024b94/attachment.bin>