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Linkage order in Linux
- From: michael kapelko <kornerr at gmail dot com>
- To: gcc at gcc dot gnu dot org
- Date: Wed, 10 Feb 2010 13:03:26 +0700
- Subject: Linkage order in Linux
Hello.
Recently I found out a surprising requirement to compile own application
with Horde3D library (http://horde3d.org/), OpenGL 3D graphics engine.
Horde3D library links to shared GL library. But -lHorde3D must be listed
*before* -lGL for any application to work correctly. If I link the
application first to GL, and only then to Horde3D, then it merely
segfaults when Horde3D's init calls glCreateShader, a GL library function.
We have several speculations about what causes this particular order for
the linker: http://horde3d.org/forums/viewtopic.php?f=2&t=384
But I'd like to know real reason of this surprising order of linkage
requirement.
Thanks.