latex2html

[vernin]

The installation of latex2html with port failed and I cannot undestand  
why:
Can you help me.

Thanks

===================
macbook-vernin:rapport_2009 jver$ sudo port install latex2html
Password:
--->  Fetching jasper
--->  Attempting to fetch jasper-1.900.1.zip from http://arn.se.distfiles.macports.org/jasper
--->  Verifying checksum(s) for jasper
--->  Extracting jasper
--->  Applying patches to jasper
--->  Configuring jasper
--->  Building jasper
--->  Staging jasper into destroot
--->  Installing jasper @1.900.1_4
--->  Activating jasper @1.900.1_4
--->  Cleaning jasper
--->  Fetching tiff
--->  Attempting to fetch tiff-3.8.2.tar.gz from ftp://ftp.uk.FreeBSD.org/pub/FreeBSD/ports/distfiles/
--->  Verifying checksum(s) for tiff
--->  Extracting tiff
--->  Applying patches to tiff
--->  Configuring tiff
Error: Target org.macports.configure returned: configure failure:  
shell command " cd "/opt/local/var/macports/build/ 
_opt_local_var_macports_sources_rsync 
.macports.org_release_ports_graphics_tiff/work/tiff-3.8.2" && ./ 
configure --prefix=/opt/local --mandir=/opt/local/share/man --with- 
docdir=/opt/local/share/doc/tiff-3.8.2 --with-jpeg-include-dir=/opt/ 
local/include --with-jpeg-lib-dir=/opt/local/lib --with-zlib-include- 
dir=/opt/local/include --with-zlib-lib-dir=/opt/local/lib --with-apple- 
opengl-framework " returned error 1
Command output: checking for int... yes
checking size of int... 4
checking for long... yes
checking size of long... 4
checking whether time.h and sys/time.h may both be included... yes
checking whether struct tm is in sys/time.h or time.h... time.h
checking for int8... no
checking for int16... no
checking for int32... no
checking for floor... yes
checking for isascii... yes
checking for memmove... yes
checking for memset... yes
checking for mmap... yes
checking for pow... yes
checking for sqrt... yes
checking for strchr... yes
checking for strrchr... yes
checking for strstr... yes
checking for strtol... yes
checking for getopt... yes
checking for strcasecmp... yes
checking for strtoul... yes
checking for lfind... yes
checking native cpu bit order... lsb2msb
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for _LARGE_FILES value needed for large files... no
checking for inflateEnd in -lz... no
configure: error: Zlib library not found at /opt/local/lib

Error: The following dependencies failed to build: netpbm tiff
Error: Status 1 encountered during processing.
===================

Jacques Vernin