[JDK-8312425](https://bugs.openjdk.org/browse/JDK-8312425) started building the libsleef library with `$(SVE_CFLAGS)` on aarch64. That variable expands to `-march=armv8-a+sve` if the compiler supports it.
The flag should only be applied to the `vector_math_sve.c` file. Applying it to the whole library means it also gets applied to `vector_math_neon.c`, and the compiler (e.g. GCC) may select SVE instructions when generating code for it. When running the resulting JDK on a CPU which does not support SVE that will lead to an illegal instruction/`SIGILL`. Testing: * Manually verified that `vector_math_neon.c` does *not* get built with `-march=armv8-a+sve` and that `vector_math_sve.c` (still) does get built with that flag. * tier1-5 (in progress) ------------- Commit messages: - 8348327: Incorrect march flag when building libsleef/vector_math_neon.c Changes: https://git.openjdk.org/jdk/pull/23245/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23245&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8348327 Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/23245.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/23245/head:pull/23245 PR: https://git.openjdk.org/jdk/pull/23245
