PFpro libs are current, version 3.06. PHP compiled fine in RedHat 7.3. Same errors on another clean install of RH 9 with PHP 4.3.2 and 4.3.1.

> ./configure --with-pfpro=shared,/usr/local/lib

Fails, returns:

configure: error: The pfpro extension requires version 2 or 3 of the SDK


config.log:

configure:61887: checking for pfproInit in -lpfpro
configure:61906: gcc -o conftest -g -O2
    -L/usr/local/lib
    conftest.c -lpfpro  -lresolv -lm -ldl -lnsl  1>&5
/usr/local/lib/libpfpro.so: undefined reference to `__ctype_b'
/usr/local/lib/libpfpro.so: undefined reference to `__ctype_tolower'
collect2: ld returned 1 exit status
configure: failed program was:
#line 61895 "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 pfproInit();

int main() {
pfproInit()
; return 0; }
configure:61939: checking for PNInit in -lpfpro
configure:61958: gcc -o conftest -g -O2
      -L/usr/local/lib
      conftest.c -lpfpro  -lresolv -lm -ldl -lnsl  1>&5
/usr/local/lib/libpfpro.so: undefined reference to `__ctype_b'
/usr/local/lib/libpfpro.so: undefined reference to `__ctype_tolower'
collect2: ld returned 1 exit status
configure: failed program was:
#line 61947 "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 PNInit();
    
int main() {
PNInit()
; return 0; }