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

[SendaoYan]

On Fri, 5 Sep 2025 12:56:07 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 996:
> 
>> 994: AC_DEFUN([BPERF_SETUP_SVE],
>> 995: [
>> 996:   UTIL_ARG_ENABLE(NAME: aarch64-sve, DEFAULT: auto,
> 
> The idea with this macro is that you put the supported check and actions on enabled/disabled in the call and let it handle the logic. It shouldn't be moved to a separate macro. Also, macros defined in this file should have the `FLAGS` prefix, not `BPERF`.

I also want to put the put the supported check and actions on enabled/disabled in the call previous. But I found that the configure will stuck at below command:


++ /usr/bin/autoconf -W all -I/home/yansendao/git/jdk-ysd/make/autoconf -


The change like that:


diff --git a/make/autoconf/flags-cflags.m4 b/make/autoconf/flags-cflags.m4
index 97e37cc923b..96ea730e80a 100644
--- a/make/autoconf/flags-cflags.m4
+++ b/make/autoconf/flags-cflags.m4
@@ -940,6 +940,10 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
   # ACLE and this flag are required to build the aarch64 SVE related functions in
   # libvectormath. Apple Silicon does not support SVE; use macOS as a proxy for
   # that check.
+  UTIL_ARG_ENABLE(NAME: aarch64-sve, DEFAULT: auto,
+      RESULT: enable_aarch64_sve,
+      DESC: [Use SVE when compile libsleef])
+  AC_SUBST(enable_aarch64_sve)
   if test "x$OPENJDK_TARGET_CPU" = "xaarch64" && test "x$OPENJDK_TARGET_OS" = "xlinux"; then
     if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
       AC_LANG_PUSH(C)
@@ -991,14 +995,6 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
   AC_SUBST($2SVE_CFLAGS)
 ])

-AC_DEFUN([BPERF_SETUP_SVE],
-[
-  UTIL_ARG_ENABLE(NAME: aarch64-sve, DEFAULT: auto,
-      RESULT: enable_aarch64_sve,
-      DESC: [Use SVE when compile libsleef])
-  AC_SUBST(enable_aarch64_sve)
-])
-
 AC_DEFUN_ONCE([FLAGS_SETUP_BRANCH_PROTECTION],
 [
   # Is branch protection available?


I think I should find other solution later.

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

PR Review Comment: https://git.openjdk.org/jdk/pull/27073#discussion_r2328699427