Re: [Flightgear-devel] Fix for missing references to SGThreads/SGMutex
Hi, On Saturday, September 24, 2011 10:38:28 James Turner wrote: > On 24 Sep 2011, at 09:04, Mathias Fröhlich wrote: > > Yes, I can see that libGL and libz is just pulled indirectly which no > > longer works on very new linux ld variants. > > Arrgh, really? That's news to me. I do not know the real version where this was introduced, nor do I know if it was introduced with increments. But if your shared object (library or executable) directly depends on some symbols in an other shared library, you need to explicitly link against this library. If you do only indirectly depend on something indirect linking is also sufficient. This is what you really want to have. For example: Say, libfontconfig is something you need but libfontconfig.so depends for some internals of reading its own configuration files on libexpat. In that case you just need to link -lfontconfig. But if you also need expat for your own xml stuff, you need to link also against -lexpat. It is *not* sufficient to say, expat is already pulled by fontconfig so I don't need that anymore. This behavour already fixes the following case: Now think what happens when the fontconfig guys would decide to use libxml2 for their config files. Since the xml reader nowhere appears in fontconfigs api it is safe to do that without an api change. Then with this scheme, fontconfig pulls itself a different xml library. And, since you already link yourself explicitly against libexpat, your symbols are still resolved too. Which kind of xml parser fontconfig uses is something you do not want to know about and is something you no longer see under the hood and you can no longer make use of this by accident. Greetings Mathias -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Fix for missing references to SGThreads/SGMutex
On 24 Sep 2011, at 09:04, Mathias Fröhlich wrote: > Yes, I can see that libGL and libz is just pulled indirectly which no longer > works on very new linux ld variants. Arrgh, really? That's news to me. James -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Fix for missing references to SGThreads/SGMutex
Hi, On Tuesday, September 20, 2011 01:22:08 Roland Häder wrote: > I have finally fixed this myself: > http://www.flightgear.org/forums/viewtopic.php?f=45&t=13539 > > Just extend 'fgpanel_LDADD' with -lsgthreads. Can someone commit this > fix? > > I also needed to add some GL stuff to the same command. Yes, I can see that libGL and libz is just pulled indirectly which no longer works on very new linux ld variants. Applied, thanks. Mathias -- All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Fix for missing references to SGThreads/SGMutex
Hi, I have finally fixed this myself: http://www.flightgear.org/forums/viewtopic.php?f=45&t=13539 Just extend 'fgpanel_LDADD' with -lsgthreads. Can someone commit this fix? I also needed to add some GL stuff to the same command. Regards, Roland diff --git a/utils/fgpanel/Makefile.am b/utils/fgpanel/Makefile.am index fedae05..4793bae 100644 --- a/utils/fgpanel/Makefile.am +++ b/utils/fgpanel/Makefile.am @@ -16,7 +16,7 @@ fgpanel_SOURCES = main.cxx \ #LIBS = fgpanel_LDADD = \ - -lGLU -lglut -lsgmath -lsgprops -lsgio -lsgdebug -lsgmisc -lsgstructure -lsgxml -lsgtiming \ - -lplibpu -lplibfnt -lplibul \ - -lrt -lpng + -lGL -lGLU -lglut -lsgmath -lsgprops -lsgio -lsgdebug -lsgmisc -lsgstructure -lsgxml -lsgtiming \ + -lplibpu -lplibfnt -lplibul -lsgthreads \ + -lrt -lpng -lz endif signature.asc Description: This is a digitally signed message part -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
