Description of problem: Linking to libxul.so (using pkg-config --cflags --libs libxul) and calling NS_InitXPCOM2() or libxpcomglue.so (using pkg-config --cflags --libs libxul-embedding) and calling XRE_InitEmbedding2() results in a segmentation fault. However, observing the libraries that the programs under xulrunner/mozilla-release/xpcom/tests/ are linked to reveals that some extra static libraries are missing from libxul.pc and libxul-embedding.pc which are linked into the application using -Wl,--whole-archive. These are: -Wl,--whole-archive -lmozglue -lmemory This is the detail that defeats every external projects nowadays to properly embed the Gecko engine. Version-Release number of selected component (if applicable): xulrunner 16.0.2 How reproducible: Always. Steps to Reproduce: 1. Try pulling e.g. mozilla-release/xpcom/tests/TestRacingServiceManager.cpp and TestHarness.h out of the xulrunner source and build it using only pkgconfig --cflags --libs libxul. 2. Run it. 3. Actual results: Segfault. Expected results: Run successfully. Additional info: There is a showstopper to fixing this problem: pkg-config rearranges the libraries and separated the -Wl,... options so the static libraries lose the proper settings. FDO bug to fix this is: https://bugs.freedesktop.org/show_bug.cgi?id=56699
Created attachment 637292 [details] Patch to fix xulrunner embedding After fixing pkg-config, this patch adds the missing static libraries to both libxul.pc and libxul-embedding.pc.
Thanks! It looks like something we should move upstream (report it at bugzilla.mozilla.org). Would you like to report it or shall I do so?
Added to xulrunner-16.0.2-3 for all Fedoras.
Created attachment 639501 [details] Patch to fix xulrunner embedding v2 After testing the previous patch a lot, it seems it does the wrong thing. E.g. using the libxul-embedding.pc creates by the first patch in both the "mozembed" code and a test program using the mozembed code results in a linker error complaining about duplicate symbols. The resolution is to split the libxul-embedding.pc file into two: one usable by shared object wrapping libxul/libxpcom[glue] and one usable by applications. This avoids the symbols in the "whole archive" linked into both a library and the app. This patch implements this.
Created attachment 639504 [details] Patch to update mozembed Just for reference, this patch updates the Embedding/NewApi code to the current xulrunner 16.0.x API and relies on the just posted "v2" patch against xulrunner. Actually, only the common and the gtk/x11 part of it. The Embedding/NewApi page is here: https://wiki.mozilla.org/Embedding/NewApi The patch is against this Mercurial repo (current tip, rev 29ac0fe51754): hg clone http://hg.mozilla.org/incubator/embedding/ mozembed
(In reply to comment #2) > Thanks! > > It looks like something we should move upstream (report it at > bugzilla.mozilla.org). Would you like to report it or shall I do so? I am only familiar with Fedora developers and I am shy to report it to Mozilla. :-) It would be nice from you to do it as a RedHat representative...
Okay, not a problem :) It looks more complicated that I expected and I'd like to update it for gtkmozembed too, we still ship it on RHEL. I'll report it at mozilla when it's ready and tested.
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