Re: [changeset] GraphicsMagick++ configuration

[John W. Eaton]

On  6-Aug-2009, David Grundberg wrote:

| John W. Eaton skrev:
| > On  6-Aug-2009, David Grundberg wrote:
| >
| > | I've rearranged the GraphicsMagick++ configuration. I had some trouble 
| > | since I'm running a custom GraphicsMagick installation. The Octave build 
| > | system was running GraphicsMagick++-config during make. It was missing 
| > | ldflags and using only the basename of the config executable (as opposed 
| > | to a full path).
| > | 
| > | I've changed it so that GraphicsMagick++-config is only run in the 
| > | configure script. Also introduced MAGICK_CONFIG as a precious variable.
| >
| > I removed --ldflags to fix the following mysterious problem on my
| > system:
| >
| >   
https://www-old.cae.wisc.edu/pipermail/octave-maintainers/2009-July/012879.html
| >
| > So I don't think I can put it back without breaking __magick_read__
| > again, at least for me and other Debian users.
| >
| > What are -Wl,-z,relro and -pie doing in the ldflags anyway?  Are those
| > arguments not present on your system?  Maybe they are present on mine
| > because of the way Debian builds the graphics magick library package?
| > Perhaps these flags make sense for creating the graphics magick
| > library itself, but I can't see any reason for them to be required to
| > link the graphics magick library with __magick_read__.oct.
| >
| > jwe
| >   
| So that's why --ldflags was taken away! I don't have that problem. This 
| is the output from my config (where I'm building):
| 
| $ 
| 
octave-patching/dependencies/graphicsmagick-install/bin/GraphicsMagick++-config 
| --ldflags --libs
| -L/Home/staff/davidg/octave-patching/dependencies/graphicsmagick-install/lib 
| -L/usr/lib -L/usr/lib
| -lGraphicsMagick++ -lGraphicsMagick -llcms -ltiff -lfreetype -ljasper 
| -ljpeg -lpng -lwmflite -lXext -lSM -lICE -lX11 -lbz2 -lxml2 -lz -lm 
| -lgomp -lpthread
| 
| My ubuntu 9.04 box says this about the managed package (haven't tried 
| building against it):
| address@hidden:~$ GraphicsMagick++-config --ldflags --libs
| -L/usr/lib -Wl,-Bsymbolic-functions -L/usr/lib/X11 -L/usr/lib -L/usr/lib
| -lGraphicsMagick++ -lGraphicsMagick -llcms -ltiff -lfreetype -ljasper 
| -ljpeg -lpng -lwmflite -lXext -lSM -lICE -lX11 -lbz2 -lxml2 -lz -lm 
| -lpthread

So what should we do about this?  I suppose we could try working
around it by filtering out everything except -L options from the
--ldflags output, but I'd rather see it fixed in graphics magick.
What should graphics magick really be storing in the config script
for --ldflags?  Should options like -pie and -Wl,-z,relro really
appear there?  Or is this just a Debian packaging problem?

jwe