When trying to compile PHP4.0.1pl2 with --with-swf, I get the following error:

/bin/sh /usr/local/src/php-4.0.1pl2/libtool --silent --mode=link gcc -g -O2   -o libphp4.la -rpath /usr/local/src/php-4.0.1pl2/libs -export-symbols /usr/local/src/php-4.0.1pl2/sapi/apache/php.sym -avoid-version -L/usr/local/libswf  -R /usr/local/libswf stub.lo Zend/libZend.la sapi/apache/libsapi.la main/libmain.la regex/libregex.la ext/db/libdb.la ext/dbase/libdbase.la ext/gd/libgd.la ext/mysql/libmysql.la ext/pcre/libpcre.la ext/posix/libposix.la ext/session/libsession.la ext/standard/libstandard.la ext/swf/libswf.la ext/sysvsem/libsysvsem.la ext/sysvshm/libsysvshm.la ext/xml/libxml.la  -lgdbm -lpam -ldl -lswf -lttf -lgd -lresolv -lm -ldl -lcrypt -lnsl -lresolv
/usr/i486-linux/bin/ld: cannot open -lswf: No such file or directory
collect2: ld returned 1 exit status
make[1]: *** [libphp4.la] Error 1
make[1]: Leaving directory `/usr/local/src/php-4.0.1pl2'
make: *** [all-recursive] Error 1 

libswf.a is in /usr/local/libswf/lib/ and swf.h is in /usr/local/libswf/include/. My configure command is:

./configure \
  --with-apxs=/usr/sbin/apxs \
  --with-mysql \
  --with-swf=/usr/local/libswf \
  --with-gd=/usr \
  --with-dbase=yes \
  --with-dom=/usr \
  --enable-dba \
  --enable-sysvshm \
  --enable-sysvsem \
  --enable-debug=no \
  --enable-safe-mode=no \
  --with-ftp=yes \
  --enable-url-fopen-wrapper=yes \
  --enable-track-vars=yes \
  --enable-versioning \
  --enable-session
make

As I'm not a real linux expert, I don't know what's going wrong while compiling.