[hobbit] trend graphs broken images

[Michael Frey]

[hobbit at nbtbigbro1 hobbit]$ ldd ~hobbit/server/bin/hobbitgraph.cgi
        librrd.so.2 => /usr/local/rrdtool-1.2.11/lib/librrd.so.2 
(0x40018000)
        libpng.so.2 => /usr/lib/libpng.so.2 (0x400ec000)
        libc.so.6 => /lib/i686/libc.so.6 (0x4011d000)
        libm.so.6 => /lib/i686/libm.so.6 (0x40258000)
        libz.so.1 => /usr/lib/libz.so.1 (0x4027b000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000

Which libpng version did you compile
        libpng-1.2.8

Did you also run "ldconfig" to update the cache of runtime
libraries ?
        I do not see ldconfig anywhere.

Michael Frey
Intel Senior Systems Engineer
The Guardian Life Insurance Company of America
3900 Burgess Place, 2-West
Bethlehem, PA 18017
E-Mail: Michael_frey at glic.com
Phone: 610-807-7889
Fax: 610-807-6003



henrik at hswn.dk (Henrik Stoerner) 
10/21/2005 01:43 AM
Please respond to
hobbit at hswn.dk



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Subject
Re: [hobbit] trend graphs broken images






On Thu, Oct 20, 2005 at 05:46:54PM -0400, Michael Frey wrote:
> 
> hobbit was compiled without any special path/include options.  It is 
> conceivalbe that when hobbit was compiled it found the stock libpng 
> libraries of RedHat 7.2

I'm sure it does. 

> > libpng warning: Application was compiled with png.h from libpng-1.2.8
> > libpng warning: Application  is running with png.c from libpng-1.0.12

Red Hat 7.2 ships with libpng 1.0.12. So it seems that hobbitgraph.cgi
picks up the standard libpng 1.0 run-time library - try doing a
"ldd ~hobbit/server/bin/hobbitgraph.cgi" and see what libraries
it picks up.

But your system has the header files - /usr/include/png.h et al - 
from another libpng version, 1.2.8. This mismatch between the
header-files (used when compiling Hobbit) and the run-time library
is what triggers this error.

> I have since recompiled libpng with "--prefix=/usr" and done a make 
> install.  This appears to have worked as the /usr/lib/libpng is from 
> today.

Which libpng version did you compile, then ? And you need to check all
of the /usr/lib/libpng.so* files, since those are the ones used at
run-time. Did you also run "ldconfig" to update the cache of runtime
libraries ?


Henrik


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