RFR: 8366777: Build fails unknown pseudo-op with old AS on linux-aarch64 [v6]

[SendaoYan]

On Tue, 9 Sep 2025 07:11:56 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> SendaoYan has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Use UTIL_ARG_ENABLE instead of AC_ARG_ENABLE
>
> make/autoconf/flags-cflags.m4 line 963:
> 
>> 961:       AC_MSG_RESULT([$sve_supported])
>> 962:       $2SVE_CFLAGS=""
>> 963:       if test "x$enable_aarch64_sve" = "xyes"; then
> 
> `UTIL_ARG_ENABLE` will return `true`, not `yes`. Have you even tested this code?

I did the test before. I was also confused that the `enable_aarch64_sve` sometimes return `yes`/`no`, sometimes return `true`/`false`, it seems depends the code implementations.

The log snippet after run bash configure.


> grep "enable_aarch64_sve=" build/linux-aarch64-server-release/configure.log -n
1117:+++ eval 'enable_aarch64_sve=$ac_optarg'
1118:++++ enable_aarch64_sve=yes
20015:+++ enable_aarch64_sve=true


[configure.log](https://github.com/user-attachments/files/22246010/configure.log)

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/27073#discussion_r2335313423