Its right in time. I am facing "Undefined Symbol" errors with XLC 13.1 due to "-qvisibility=hidden" which hides all symbols by default. I workaround that by removing this flag
Hello, so it seems that I better remove the "-qvisibility=<setting>" completely for xlc (and not only for xlc12.1) ? (we currently compile only with XLC 12.1 , there might be more issues with 13.1 ) Best regards, Matthias
-----Original Message----- From: Bhaktavatsal R Maram [mailto:bhamaram@in.ibm.com] Sent: Donnerstag, 26. April 2018 16:32 To: Baesken, Matthias <matthias.baesken@sap.com> Cc: 'build-dev@openjdk.java.net' <build-dev@openjdk.java.net>; ppc-aix- port-dev@openjdk.java.net; core-libs-dev@openjdk.java.net; Simonis, Volker <volker.simonis@sap.com> Subject: Re: RFR : 8202322: AIX: symbol visibility flags not support on xlc 12.1
Hi Matthias,
Its right in time. I am facing "Undefined Symbol" errors with XLC 13.1 due to "-qvisibility=hidden" which hides all symbols by default. I workaround that by removing this flag
-bash-4.4$ xlC -qversion IBM XL C/C++ for AIX, V13.1.3 (5725-C72, 5765-J07) Version: 13.01.0003.0000
Looks like there are many function declarations that require changes to make function visible.
Thanks, Bhaktavatsal Reddy
-----"core-libs-dev" <core-libs-dev-bounces@openjdk.java.net> wrote: ----- To: "'build-dev@openjdk.java.net'" <build-dev@openjdk.java.net>, "ppc- aix-port-dev@openjdk.java.net" <ppc-aix-port-dev@openjdk.java.net>, "core-libs-dev@openjdk.java.net" <core-libs-dev@openjdk.java.net> From: "Baesken, Matthias" Sent by: "core-libs-dev" Date: 04/26/2018 07:45PM Cc: "Simonis, Volker" <volker.simonis@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 :
https://www.ibm.com/developerworks/aix/library/au-aix-symbol-visibility- part2/index.html
Setting it only generates hundreds of warnings in the build log , warnings look like this : XlC12.1
bash-4.4$ xlC -qversion IBM XL C/C++ for AIX, V12.1 (5765-J02, 5725-C72) Version: 12.01.0000.0019
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) Version: 13.01.0000.0008 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 :
Bug :
https://urldefense.proofpoint.com/v2/url?u=https- 3A__bugs.openjdk.java.net_browse_JDK- 2D8202322&d=DwIFAg&c=jf_iaSHvJObTbx- siA1ZOg&r=KUVGEwJiRVpNtQ9wUhGP6BKqzSTV1OWX31WWPdQMmqg&m =F6_aATE7bsRWZG5lPZhJUESHNGqST5MNbkULllIH8l4&s=M4IJ- YdB3dfN7lj0DEWozQbipDXmgKtSu3pEyMcJF_E&e=
Change :
https://urldefense.proofpoint.com/v2/url?u=http- 3A__cr.openjdk.java.net_- 7Embaesken_webrevs_8202322_&d=DwIFAg&c=jf_iaSHvJObTbx- siA1ZOg&r=KUVGEwJiRVpNtQ9wUhGP6BKqzSTV1OWX31WWPdQMmqg&m =F6_aATE7bsRWZG5lPZhJUESHNGqST5MNbkULllIH8l4&s=gb0OP9fQTAWWJb BZDK6L_0gTKf1pwna8aXaYr_uVv8Q&e=
Best regards, Matthias