I did a simple program in KDevelop like this:

1.

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <iostream>
#include <cstdlib>
#include "pbm.h"

using namespace std;

int main( int argc, char** argv )
{
pbm_init(NULL, NULL);
bit **bits = NULL;
bits = pbm_allocarray(640,480);

}

2.
Add "/usr/include" to my include directory, which contains pbm.h ( I think this directory contains every head files after I install netpbm-10.25.rpm)

3.
Add "-lnetpbm" as my dynamic library, which I thought is the only

4.
Compile, pass. Success

5.
Build! Wrong!!! Obviously, Link Error. Is there anybody who can just tell me what else I'm short of?? I'm sure that those 2 functions `pbm_init(int*, char**)' and `pm_allocarray(int, int, int)' should be in the library netpbm. Besides, I tried the static library libnetpbm.a as well. the same error.. Any other libraries I need???

cd '/home/pjia/programs/netpbm_test/debug' && WANT_AUTOCONF_2_5="1" WANT_AUTOMAKE_1_6="1" gmake -k
gmake all-recursive
Making all in src
/bin/sh ../libtool --mode=link --tag=CXX g++ -O0 -g3 -o netpbm_test netpbm_test.o -lnetpbm
g++ -O0 -g3 -o netpbm_test netpbm_test.o -lnetpbm
netpbm_test.o(.text+0x120): In function `main':
/home/pjia/programs/netpbm_test/src/netpbm_test.cpp:36: undefined reference to `pbm_init(int*, char**)'
netpbm_test.o(.text+0x13e):/home/pjia/programs/netpbm_test/src/netpbm_test.cpp:38: undefined reference to `pm_allocarray(int, int, int)'
collect2: ld returned 1 exit status
gmake[2]: *** [netpbm_test] Error 1
gmake[2]: Target `all' not remade because of errors.
gmake[1]: *** [all-recursive] Error 1
gmake: *** [all] Error 2
*** Exited with status: 2 ***


Thank you very much

Two things:

My system is calling the pbm library libpbm.so, not libnetpbm.so. Also, my libpbm.so called the allocarray function pm_allocarray, not pbm_allocarray.

Try those, instead.

Yes, I will try that. But when I did the following command line

$ nm -C /usr/local/netpbm/lib/libnetpbm.a | grep "pm_allocarray"
0000043c T pm_allocarray
U pm_allocarray
U pm_allocarray
U pm_allocarray
U pm_allocarray
U pm_allocarray

$ nm -C /usr/local/netpbm/lib/libnetpbm.a | grep "pm_init"
00000000 T pbm_init
U pbm_init


U means undefined, T means contained...

Why it alwasy tell T and U at the same time? I will try netpbm 9.0...
But, in my opnion, netpbm 10.0 does work, but I don't know how to let it work correctly...

Anyway, thank you very much...