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

[SendaoYan]

On Fri, 5 Sep 2025 13:00:02 GMT, Erik Joelsson <erikj 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 981:
> 
>> 979:       if test "x$$2SVE_CFLAGS" != "x" && test "x$DEBUG_LEVEL" != xrelease && test "x$TOOLCHAIN_TYPE" = xgcc ; then
>> 980:         INIT_ZERO_FLAG="-ftrivial-auto-var-init=zero"
>> 981:         FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$INIT_ZERO_FLAG],
> 
> When calling `FLAGS_COMPILER_CHECK_ARGUMENTS` you from this context, you need to include the `PREFIX` argument. See examples further up in this file.

Fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27073#discussion_r2336537007