On Thu, 4 Sep 2025 13:45:57 GMT, SendaoYan <[email protected]> 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 one additional > commit since the last revision: > > Add the original comments for -ftrivial-auto-var-init=zero
I have updated this PR which add configure parameter --enable-aarch64-sve to enable '-march=armv8-a+sve' forcely. Testing: 1. On linux-aarch64 gcc12.3.1 as2.37 - [x] On linux-aarch64 gcc12.3.1 as2.37, and run 'bash configure --enable-aarch64-sve', config.log shows SVE_CFLAGS='-march=armv8-a+sve' - [x] On linux-aarch64 gcc12.3.1 as2.37, and run 'bash configure --disable-aarch64-sve', config.log shows SVE_CFLAGS='' - [x] On linux-aarch64 gcc12.3.1 as2.37, and run 'bash configure', config.log shows SVE_CFLAGS='-march=armv8-a+sve' 2. On linux-aarch64 gcc10.3.0 as2.30 - [x] On linux-aarch64 gcc10.3.0 as2.30, and run 'bash configure --enable-aarch64-sve', configure report error "--enable-aarch64-sve=yes but compiler does not support SVE" - [x] On linux-aarch64 gcc10.3.0 as2.30, and run 'bash configure --enable-aarch64-sve', configure report error "--enable-aarch64-sve=yes but compiler does not support SVE", config.log shows SVE_CFLAGS='' ------------- PR Comment: https://git.openjdk.org/jdk/pull/27073#issuecomment-3253851324
