Installed fdftk4_05 from Adobe. Copied the required header file fdftk.h into
/usr/local/include/FdfTk.h and the library libfdftk.so into 
/usr/local/lib/libFdfTk.so 

Run configure as follow :-
 
    ./configure --with-apxs=/usr/sbin/apxs --with-fdftk

Produce this error :


checking whether to include fdftk support... yes
checking for FDFOpen in -lFdfTk... no
configure: error: fdftk module requires fdftk 2.0

The last section of my  config.log contains the following statement :-

configure:11472: checking whether to include fdftk support
configure:11606: checking for FDFOpen in -lFdfTk
configure:11625: gcc -o conftest -g -O2  -DEAPI=1  conftest.c -lFdfTk
-lresolv
-lm -ldl -lcrypt -lnsl  -lresolv 1>&5
/usr/local/lib/libFdfTk.so: undefined reference to `_xstat'
/usr/local/lib/libFdfTk.so: undefined reference to `__setjmp'
/usr/local/lib/libFdfTk.so: undefined reference to `_fxstat'
collect2: ld returned 1 exit status
configure: failed program was:
#line 11614 "configure"
#include "confdefs.h"
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char FDFOpen();

int main() {
FDFOpen()
; return 0; }