RFR: 8312425: [vectorapi] AArch64: Optimize vector math operations with SLEEF [v7]

[Xiaohong Gong]

On Wed, 6 Dec 2023 11:46:03 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Xiaohong Gong has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add "--with-libsleef-lib" and "--with-libsleef-include" options
>
> make/modules/jdk.incubator.vector/Lib.gmk line 45:
> 
>> 43:   $(eval $(call SetupJdkLibrary, BUILD_LIBVMATH, \
>> 44:       NAME := vmath, \
>> 45:       CFLAGS := $(CFLAGS_JDKLIB) $(LIBSLEEF_CFLAGS) -fvisibility=default, \
> 
> Why `-fvisibility=default`? (Sorry, only noticed this now)

Yeah. Considering all the symbols in this lib are global and need to be exported, I added this flag here instead of the source code. I'v removed this in latest commit, and added the attribute visibility in source code like other jdk code. Please help to review again. Thanks a lot!

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PR Review Comment: https://git.openjdk.org/jdk/pull/16234#discussion_r1418458207