Bug 43228

Summary:	build (linking): many multiple definitions of symbols - cairo-gl only (GCC 4.6.2)
Product:	cairo	Reporter:	Daniel Housar <danielhousar>
Component:	gl backend	Assignee:	cairo-bugs mailing list <cairo-bugs>
Status:	RESOLVED WORKSFORME	QA Contact:	cairo-bugs mailing list <cairo-bugs>
Severity:	normal
Priority:	medium
Version:	1.10.3
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Daniel Housar 2011-11-24 10:37:31 UTC

Compilation went fine, but when it tried link *.o objects to libcairo.la file, there apeared errors about multiple definitions of symbols in cairo-gl-*.o files.

Cairo sources: 1.11.3 (GIT master 24.11.2011) - git.freedesktop.org

System:
GCC 4.6.2 (ArchLinux package repository)
glibc 2.14.1 (ArchLinux package repository)
Mesa: 7.12.0 GIT master (11. Nov. 2011)
Linux 3.2.0-rc2+ (nouveau GIT tree)
arch: x86 (32-bit) - 1 CPU core (not SMP)

I have not access to other Linux machines, so I can't try to reproduce this bug in another environment.

Partial output of 'make':

make[4]: Leaving directory `/src/freedesktop.org/cairo'
  CCLD   libcairo.la
.libs/cairo-gl-composite.o: In function `_cairo_gl_composite_set_source':
/src/freedesktop.org/cairo/src/cairo-gl-composite.c:60: multiple definition of `_cairo_gl_composite_set_source'
.libs/cairo-gl-composite.o:/src/freedesktop.org/cairo/src/cairo-gl-composite.c:60: first defined here
...
...
...
.libs/cairo-gl-surface.o: In function `INT_cairo_gl_surface_create_for_texture':
/src/freedesktop.org/cairo/src/cairo-gl-surface.c:586: multiple definition of `cairo_gl_surface_create_for_texture'
.libs/cairo-gl-surface.o:/src/freedesktop.org/cairo/src/cairo-gl-surface.c:586: first defined here
collect2: ld returned 1 exit status
make[3]: *** [libcairo.la] Error 1

Comment 1 Daniel Housar 2011-11-25 08:58:40 UTC

Today (25th November 2011 16:52 UTC), after 'git pull', multiple definition bug still appears. When I removed definition of function from header or commented its 'slim_hidden_def()', the output line about this symbol disappeared from 'make' output (wasn't duplicated). Changing declaration from cairo_private to extern doesn't help.

Comment 2 Chris Wilson 2012-10-21 16:41:55 UTC

I'm not away of anyone else hitting this issue so I presume it was either a transient issue in the sources, or something went very wrong with the build.

Comment 3 Stirling Westrup 2013-08-30 14:54:26 UTC

I've just hit this exact same bug. This is when compiling Cairo under CentOS 6.

I suspect its due to the fact that I have enabled a number of the experimental interfaces, as I have some projects planned that might have a use for them.

My configure invokation was:

./configure --enable-gl --enable-glesv2 --enable-directfb --enable-xlib-xcb --enable-test-surfaces --enable-tee --enable-xml

I suspect the issue is that I have both --enable-gl and --enable-glesv2 at the same time, as other folks have reported issues when doing that.

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