RFR : 8202322: AIX: symbol visibility flags not support on xlc 12.1
christoph.langer at sap.com
Thu Apr 26 14:38:04 UTC 2018
to me the change in principal looks good.
I'm wondering if it is possible to do a comparison like xlc < 13 (e.g. extract major number before the first dot, then compare numerically) - but maybe it is too complicated and the current single version compare suits our needs ?
From: Baesken, Matthias
Sent: Donnerstag, 26. April 2018 16:14
To: 'build-dev at openjdk.java.net' <build-dev at openjdk.java.net>; ppc-aix-port-dev at openjdk.java.net; core-libs-dev at openjdk.java.net
Cc: Langer, Christoph <christoph.langer at sap.com>; Simonis, Volker <volker.simonis at sap.com>
Subject: RFR : 8202322: AIX: symbol visibility flags not support on xlc 12.1
Hello , could you please review this small adjustment to the symbol visibility compilation settings on AIX ?
Currently we use XLC 12.1 to compile JDK on AIX .
However XLC 12.1 does not support the "-qvisibility=hidden" setting currently set on AIX.
It was introduced with XLC 13.1 . Christoph found some info about it here :
Setting it only generates hundreds of warnings in the build log , warnings look like this :
bash-4.4$ xlC -qversion
IBM XL C/C++ for AIX, V12.1 (5765-J02, 5725-C72)
bash-4.4$ xlC -qvisibility=hidden sizeof.c -o sizeof_aixxlc
1506-173 (W) Option visibility=hidden is not valid. Enter xlC for list of valid options.
Compare to XLC13.1
bash-3.00$ xlC -qversion
IBM XL C/C++ for AIX, V13.1 (5725-C72, 5765-J07)
bash-3.00$ xlC -qvisibility=default sizeof.c -o sizeof_aixxlc
bash-3.00$ xlC -qvisibility=hidden sizeof.c -o sizeof_aixxlc
So it is better to avoid setting these flags when using xlc12.1 .
Please review :
Best regards, Matthias
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