Also applies to the 3.5.x series (and maybe older).
This is the error:
===================================================
Compiling ../nsswitch/pam_winbind.c
../nsswitch/pam_winbind.c: In function ‘_pam_parse’:
../nsswitch/pam_winbind.c:440:76: warning: comparison between pointer
and integer
../nsswitch/pam_winbind.c:445:7: warning: comparison between pointer and integer
../nsswitch/pam_winbind.c:447:7: warning: comparison between pointer and integer
../nsswitch/pam_winbind.c: In function ‘get_conf_item_string’:
../nsswitch/pam_winbind.c:2293:12: warning: assignment makes pointer
from integer without a cast
Linking shared library bin/pam_winbind.so
../nsswitch/pam_winbind.o: In function `_pam_parse':
pam_winbind.c:(.text+0x3a6): undefined reference to `iniparser_getstr'
pam_winbind.c:(.text+0x3ce): undefined reference to `iniparser_getstr'
pam_winbind.c:(.text+0x6b6): undefined reference to `iniparser_getstr'
../nsswitch/pam_winbind.o: In function `get_conf_item_string':
pam_winbind.c:(.text+0x12bb): undefined reference to `iniparser_getstr'
collect2: ld returned 1 exit status
===================================================

Unfortunately the older iniparser-3.0b tarball no longer seems to be available @ http://ndevilla.free.fr