<AWT Dev> RFR(XS): 8201524: [AIX] Don't link libfontmanager against libawt_headless

[Langer, Christoph]

Hi Volker,

looks good.

Best regards
Christoph

> -----Original Message-----
> From: awt-dev [mailto:awt-dev-bounces at openjdk.java.net] On Behalf Of
> Volker Simonis
> Sent: Freitag, 13. April 2018 15:29
> To: awt-dev <awt-dev at openjdk.java.net>; build-dev <build-
> dev at openjdk.java.net>
> Subject: <AWT Dev> RFR(XS): 8201524: [AIX] Don't link libfontmanager
> against libawt_headless
> 
> Hi,
> 
> can I please have a review for this tiny AIX cleanup:
> 
> http://cr.openjdk.java.net/~simonis/webrevs/2018/8201524/
> https://bugs.openjdk.java.net/browse/JDK-8201524
> 
> This is a follow up change of JDK-8196516 which discovered that on AIX
> libfontmanager is always linked against libawt_headless at build time.
> If we are running in a headfull environment, libfontmanager will
> dynamically load libawt_xawt which is not good because libawt_headless
> and libawt_xawt define some common symbols. If we're running in a
> headless environment, libawt_headless may be loaded a second time (at
> least on Linux/Solaris) which isn't good either.
> 
> Both of these scenarios haven't caused any problems on AIX yet, but I
> think it's good to cleanup the AIX implementation as well and don't
> link libfontmanager against libawt_headless anymore. In order to
> achieve this, we have to allow unresolved symbols during the linking
> of libfontmanager. This can be easily achieved by adding the additions
> linker flag "-Wl$(COMMA)-berok" through LDFLAGS_aix. This works fine
> for AIX because options which come later on the command line take
> precedence
> over earlier ones.
> 
> Thank you and best regards,
> Volker