Ubuntu
imlib2 package

Bug #12642
Comment #5

Comment 5 for bug 12642

Revision history for this message

In Debian Bug tracker #293815, Don Armstrong (dondelelcaro) wrote on 2005-02-08:

reassign 293815 libimlib2
severity 293815 serious
thanks

The loaders for libimlib2 need to link with libImlib2.so by default.
This was apparently changed in 1.2.0 (see after the IRC conversation)

<dondelelcaro> vorlon: well, maybe that's not what it is... I'm trying
               to understand why the loaders for Imlib2 would work
               fine with just Imlib2, but fail when I try to load them
               into perl
<dondelelcaro> it's #293815
<dondelelcaro> there doesn't seem to be any obvious issues that I can
               see
<dondelelcaro> (but then, I'm not an expert at dynamic libraries by
                any stretch of the imagination
<vorlon> dondelelcaro: you're trying to load them directly into perl,
         or you're trying to load Imlib2 which is then loading the
         loaders?
* trave11er senses a trick question
<dondelelcaro> vorlon: load Imlib2 which is then loading the loaders
<vorlon> if the latter, there's a possible issue if the loaders are
         trying to look up symbols in imlib2 but have not been linked
         against it, since symbols in a library linked by an
         application are in the search path by default, but symbols in
         a library that has itself been dlopen()ed are not.
<dondelelcaro> well, even more complicated. load Image::Imlib2 which
               then loads Imlib2 which loads the loaders
<vorlon> right, same problem.
<vorlon> Are you getting undefined symbol errors, or no error at all?
<dondelelcaro> vorlon: no error at all...
<vorlon> what does ldd -d -r <loader.so> show?
<dondelelcaro> vorlon: ah, excellent
<dondelelcaro> undefined symbol: __imlib_GetTag (/usr/lib/imlib2/loaders/png.so)
<vorlon> yep.
<vorlon> so to be used in situations where imlib2 is being dlopen()ed,
         those loaders themselves need to be linked against imlib.
<dondelelcaro> vorlon: ok...
<dondelelcaro> cool... makes sense... and the fact that the perl
               module links against them isn't good enough, right?
<dondelelcaro> rrr... links against libImlib2
<vorlon> right. When I say "imlib2 is being dlopen()ed", I mean
         "imlib2 is only linked to by something that's being dlopen()ed"
<vorlon> either way, it doesn't end up in the master symbol list.
<dondelelcaro> oh, ok... so when the next thing gets dlopen()ed it
               doesn't get to see the symbols loaded by something else
               that was dlopen()ed?
<vorlon> right.
<vorlon> unless you use a particular flag to dlopen() -- one that you should never, ever use. :)
<dondelelcaro> vorlon: right. Ok, good.
* dondelelcaro reassigns the bug to imlib2 with this conversation

This probably needs to be taken care of upstream, because I've already
heard reports of it breaking on Fedora, Mandrake, and Ubuntu.
[Probably breaks elsewhere as well.]

The following is basically the change that broke Imlib2 for perl:

jpeg_la_SOURCES = loader_jpeg.c
-jpeg_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-jpeg_la_LIBADD = @JPEGLIBS@ -lImlib2
+jpeg_la_LDFLAGS = -module -avoid-version
+jpeg_la_LIBADD = @JPEGLIBS@
png_la_SOURCES = loader_png.c
-png_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-png_la_LIBADD = @PNGLIBS@ -lImlib2
+png_la_LDFLAGS = -module -avoid-version
+png_la_LIBADD = @PNGLIBS@
tiff_la_SOURCES = loader_tiff.c
-tiff_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-tiff_la_LIBADD = @TIFFLIBS@ -lImlib2
+tiff_la_LDFLAGS = -module -avoid-version
+tiff_la_LIBADD = @TIFFLIBS@
gif_la_SOURCES = loader_gif.c
-gif_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-gif_la_LIBADD = @GIFLIBS@ -lImlib2
+gif_la_LDFLAGS = -module -avoid-version
+gif_la_LIBADD = @GIFLIBS@
+zlib_la_SOURCES = loader_zlib.c
+zlib_la_LDFLAGS = -module -avoid-version
+zlib_la_LIBADD = @ZLIBLIBS@
+bz2_la_SOURCES = loader_bz2.c
+bz2_la_LDFLAGS = -module -avoid-version
+bz2_la_LIBADD = @BZ2LIBS@
pnm_la_SOURCES = loader_pnm.c
-pnm_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-pnm_la_LIBADD = -lImlib2
+pnm_la_LDFLAGS = -module -avoid-version
+pnm_la_LIBADD =
argb_la_SOURCES = loader_argb.c
-argb_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-argb_la_LIBADD = -lImlib2
+argb_la_LDFLAGS = -module -avoid-version
+argb_la_LIBADD =
bmp_la_SOURCES = loader_bmp.c
-bmp_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-bmp_la_LIBADD = -lImlib2
+bmp_la_LDFLAGS = -module -avoid-version
+bmp_la_LIBADD =
xpm_la_SOURCES = loader_xpm.c
-xpm_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-xpm_la_LIBADD = -lImlib2
+xpm_la_LDFLAGS = -module -avoid-version
+xpm_la_LIBADD =
tga_la_SOURCES = loader_tga.c
-tga_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-tga_la_LIBADD = -lImlib2
-zlib_la_SOURCES = loader_zlib.c
-zlib_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-zlib_la_LIBADD = @ZLIBLIBS@ -lImlib2
-bz2_la_SOURCES = loader_bz2.c
-bz2_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-bz2_la_LIBADD = @BZ2LIBS@ -lImlib2
+tga_la_LDFLAGS = -module -avoid-version
+tga_la_LIBADD =
lbm_la_SOURCES = loader_lbm.c
-lbm_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-lbm_la_LIBADD = -lImlib2
+lbm_la_LDFLAGS = -module -avoid-version
+lbm_la_LIBADD =
all: all-am

.SUFFIXES:
.SUFFIXES: .c .lo .o .obj
-$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(am__configure_deps)
+$(srcdir)/Makefile.in: $(srcdir)/Makefile.am $(am__configure_deps)
  @for dep in $?; do \
    case '$(am__configure_deps)' in \
      *$$dep*) \

--
I'd sign up in a hot second for any cellular company whose motto was:
"We're less horrible than a root canal with a cold chisel."
-- Cory Doctorow

http://www.donarmstrong.com http://rzlab.ucr.edu

reassign 293815 libimlib2
severity 293815 serious
thanks

The loaders for libimlib2 need to link with libImlib2.so by default.
This was apparently changed in 1.2.0 (see after the IRC conversation)

<dondelelcaro> vorlon: well, maybe that's not what it is... I'm trying
               to understand why the loaders for Imlib2 would work
               fine with just Imlib2, but fail when I try to load them
               into perl
<dondelelcaro> it's #293815
<dondelelcaro> there doesn't seem to be any obvious issues that I can
               see
<dondelelcaro> (but then, I'm not an expert at dynamic libraries by
                any stretch of the imagination
<vorlon> dondelelcaro: you're trying to load them directly into perl,
         or you're trying to load Imlib2 which is then loading the
         loaders?
 * trave11er senses a trick question
<dondelelcaro> vorlon: load Imlib2 which is then loading the loaders
<vorlon> if the latter, there's a possible issue if the loaders are
         trying to look up symbols in imlib2 but have not been linked
         against it, since symbols in a library linked by an
         application are in the search path by default, but symbols in
         a library that has itself been dlopen()ed are not.
<dondelelcaro> well, even more complicated. load Image::Imlib2 which
               then loads Imlib2 which loads the loaders
<vorlon> right, same problem.
<vorlon> Are you getting undefined symbol errors, or no error at all?
<dondelelcaro> vorlon: no error at all...
<vorlon> what does ldd -d -r <loader.so> show?
<dondelelcaro> vorlon: ah, excellent
<dondelelcaro> undefined symbol: __imlib_GetTag        (/usr/lib/imlib2/loaders/png.so)
<vorlon> yep.
<vorlon> so to be used in situations where imlib2 is being dlopen()ed,
         those loaders themselves need to be linked against imlib.
<dondelelcaro> vorlon: ok...
<dondelelcaro> cool... makes sense... and the fact that the perl
               module links against them isn't good enough, right?
<dondelelcaro> rrr... links against libImlib2
<vorlon> right. When I say "imlib2 is being dlopen()ed", I mean
         "imlib2 is only linked to by something that's being dlopen()ed"
<vorlon> either way, it doesn't end up in the master symbol list.
<dondelelcaro> oh, ok... so when the next thing gets dlopen()ed it
               doesn't get to see the symbols loaded by something else
               that was dlopen()ed?
<vorlon> right.
<vorlon> unless you use a particular flag to dlopen() -- one that you should never, ever use. :)
<dondelelcaro> vorlon: right. Ok, good.
 * dondelelcaro reassigns the bug to imlib2 with this conversation

This probably needs to be taken care of upstream, because I've already
heard reports of it breaking on Fedora, Mandrake, and Ubuntu.
[Probably breaks elsewhere as well.]

The following is basically the change that broke Imlib2 for perl:

--- Makefile.in	2005-01-05 17:22:26.000000000 -0800
+++ ../../imlib2-1.2.0/src/modules/loaders/Makefile.in	2005-02-05 14:34:57.000000000 -0800
@@ -286,49 +268,54 @@
 $(GIF_L) \
 $(ZLIB_L) \
 $(BZ2_L) \
-pnm.la argb.la bmp.la xpm.la tga.la lbm.la
+pnm.la \
+argb.la \
+bmp.la \
+xpm.la \
+tga.la \
+lbm.la
 
 jpeg_la_SOURCES = loader_jpeg.c
-jpeg_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-jpeg_la_LIBADD = @JPEGLIBS@ -lImlib2
+jpeg_la_LDFLAGS = -module -avoid-version
+jpeg_la_LIBADD = @JPEGLIBS@
 png_la_SOURCES = loader_png.c
-png_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-png_la_LIBADD = @PNGLIBS@ -lImlib2
+png_la_LDFLAGS = -module -avoid-version
+png_la_LIBADD = @PNGLIBS@
 tiff_la_SOURCES = loader_tiff.c
-tiff_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-tiff_la_LIBADD = @TIFFLIBS@ -lImlib2
+tiff_la_LDFLAGS = -module -avoid-version
+tiff_la_LIBADD = @TIFFLIBS@
 gif_la_SOURCES = loader_gif.c
-gif_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-gif_la_LIBADD = @GIFLIBS@ -lImlib2
+gif_la_LDFLAGS = -module -avoid-version
+gif_la_LIBADD = @GIFLIBS@
+zlib_la_SOURCES = loader_zlib.c
+zlib_la_LDFLAGS = -module -avoid-version
+zlib_la_LIBADD = @ZLIBLIBS@ 
+bz2_la_SOURCES = loader_bz2.c
+bz2_la_LDFLAGS = -module -avoid-version
+bz2_la_LIBADD = @BZ2LIBS@ 
 pnm_la_SOURCES = loader_pnm.c
-pnm_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-pnm_la_LIBADD = -lImlib2
+pnm_la_LDFLAGS = -module -avoid-version
+pnm_la_LIBADD = 
 argb_la_SOURCES = loader_argb.c
-argb_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-argb_la_LIBADD = -lImlib2
+argb_la_LDFLAGS = -module -avoid-version
+argb_la_LIBADD = 
 bmp_la_SOURCES = loader_bmp.c
-bmp_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-bmp_la_LIBADD = -lImlib2
+bmp_la_LDFLAGS = -module -avoid-version
+bmp_la_LIBADD = 
 xpm_la_SOURCES = loader_xpm.c
-xpm_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-xpm_la_LIBADD = -lImlib2
+xpm_la_LDFLAGS = -module -avoid-version
+xpm_la_LIBADD = 
 tga_la_SOURCES = loader_tga.c
-tga_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-tga_la_LIBADD = -lImlib2
-zlib_la_SOURCES = loader_zlib.c
-zlib_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-zlib_la_LIBADD = @ZLIBLIBS@ -lImlib2
-bz2_la_SOURCES = loader_bz2.c
-bz2_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-bz2_la_LIBADD = @BZ2LIBS@ -lImlib2
+tga_la_LDFLAGS = -module -avoid-version
+tga_la_LIBADD = 
 lbm_la_SOURCES = loader_lbm.c
-lbm_la_LDFLAGS = -no-undefined -module -avoid-version -L$(top_builddir)/src -L$(top_builddir)/src/.libs
-lbm_la_LIBADD = -lImlib2
+lbm_la_LDFLAGS = -module -avoid-version
+lbm_la_LIBADD = 
 all: all-am
 
 .SUFFIXES:
 .SUFFIXES: .c .lo .o .obj
-$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
 	@for dep in $?; do \
 	  case '$(am__configure_deps)' in \
 	    *$$dep*) \

-- 
I'd sign up in a hot second for any cellular company whose motto was:
"We're less horrible than a root canal with a cold chisel."
 -- Cory Doctorow

http://www.donarmstrong.com              http://rzlab.ucr.edu

Ubuntuimlib2 package

Comment 5 for bug 12642

Ubuntu
imlib2 package