RFR: JDK-8313244: NM flags handling in configure process [v2]

[Matthias Baesken]

On Fri, 4 Aug 2023 11:17:43 GMT, Andreas Steiner <duke at openjdk.org> wrote:

>> On AIX we need the -X64 option for NM in the build. The handling is equivalent to the other used tools flags like AR.
>> This change will replace the quick fix done in https://bugs.openjdk.org/browse/JDK-8312466.
>
> Andreas Steiner has updated the pull request incrementally with one additional commit since the last revision:
> 
>   remove needless else

make/common/NativeCompilation.gmk  uses NM too, is there a reason to avoid the flag there?
flags-other.m4 : the comment 'on AIX ...'  is just stating the obvious;  maybe it should better mention that without -X64 we only process 32bit objects ('Processes only 32-bit object files' says the manpage , and this is the default on AIX) ; or avoid the comment altogether ?

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PR Review: https://git.openjdk.org/jdk/pull/15150#pullrequestreview-1562785813