Note - Building with php4-latest from today (03291445).  Did not have problems compiling (same configure) with a previous php4-latest 

Running ucd-snmp 4.0.1 


My configure:

./configure  --with-config-file-path=/usr/local/etc/php --enable-safe-mode --disable-debug --with-exec-dir=/usr/local/etc/php/bin --with-apxs --with-mod_charset --with-ftp --with-gd=/usr/local --with-imap --enable-trans-sid --enable-ucd-snmp-hack --with-regex=apache --enable-sysvsem --enable-sysvshm --enable-wddx --enable-xml --with-gdbm=/usr/local --with-ndbm --with-dbase --with-mm --with-tsrm-pthreads --with-openssl --with-jpeg-dir=/usr/local --with-mysql --with-zlib=/usr --with-snmp --enable-memory-limit

gmake output: (snmp part)
Making all in snmp
gmake[2]: Entering directory `/data/work/web/php4-200003291445/ext/snmp'
gmake[3]: Entering directory `/data/work/web/php4-200003291445/ext/snmp'
/bin/sh ../../libtool --silent --mode=compile gcc -DHAVE_CONFIG_H -I. -I/data/work/web/php4-200003291445/ext/snmp -I../.. -I../../Zend -I/data/work/web/php4-200003291445 -I/data/apache/include -I/usr/local/include -I/usr/local/include -I/usr/local/include/gd -I/data/work/web/php4-200003291445/ext/mysql/libmysql -I/usr/local/include/ucd-snmp -I/data/work/web/php4-200003291445/ext/xml/expat/xmltok -I/data/work/web/php4-200003291445/ext/xml/expat/xmlparse  -DEAPI=1 -DXML_BYTE_ORDER=12 -D_REENTRANT -D_THREAD_SAFE -g -O2  -c snmp.c
snmp.c: In function `php_if_snmp_set_quick_print':
snmp.c:366: parse error before `int'
snmp.c:367: `set_val' undeclared (first use this function)
snmp.c:367: (Each undeclared identifier is reported only once
snmp.c:367: for each function it appears in.)
gmake[3]: *** [snmp.lo] Error 1
gmake[3]: Leaving directory `/data/work/web/php4-200003291445/ext/snmp'
gmake[2]: *** [all-recursive] Error 1
gmake[2]: Leaving directory `/data/work/web/php4-200003291445/ext/snmp'
gmake[1]: *** [all] Error 1
gmake[1]: Leaving directory `/data/work/web/php4-200003291445/ext'
gmake: *** [all-recursive] Error 1