On Fri, 12 Sep 2025 13:44:04 GMT, SendaoYan <s...@openjdk.org> wrote:
>> Hi all, >> >> Build jdk on linux-aarch64 with older assembler version(as 2.30) will report >> compilation failre, shows as >> [JDK-8366777](https://bugs.openjdk.org/browse/JDK-8366777). >> >> This PR add the expression `svfloat64_t a() {}` to makefile which will >> trigger the compilation during configure stage. After this PR, at configure >> stage will check the gcc and assember support `-march=armv8-a+sve` or not >> more comprehensive. >> >> Testing: >> - [x] On linux-aarch64 gcc12.3.1 as2.37, configure set SVE_CFLAGS as >> '-march=armv8-a+sve' >> - [x] On linux-aarch64 gcc10.3.0 as2.30, configure set SVE_CFLAGS as empty >> >> >> The compilation fails demo as below: >> >> >> # cat sve.c >> #include <arm_sve.h> >> svfloat64_t a() {} >> # gcc -march=armv8-a+sve sve.c >> /tmp/ccVOzMzb.s: Assembler messages: >> /tmp/ccVOzMzb.s:6: Error: unknown pseudo-op: `.variant_pcs' > > SendaoYan has updated the pull request incrementally with three additional > commits since the last revision: > > - Call AC_MSG_RESULT([$AVAILABLE]) inside AC_COMPILE_IFELSE > - Use CC directly > - Move comment from called to macro definition make/autoconf/flags-other.m4 line 139: > 137: [ > 138: AVAILABLE=true > 139: AC_MSG_RESULT([$AVAILABLE]) I meant that you would explicitly output `yes` here, otherwise there is no point in moving the call. ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/27073#discussion_r2344318327
