Warning Message - pngconf.h

[tedm]

Hi,

When trying to configure wvWare, I received the following warning.
I was prompted to report this warning, so here it is:
-----------------------------------------------------
...
checking pngconf.h usability... no
checking pngconf.h presence... yes
configure: WARNING: pngconf.h: present but cannot be compiled
configure: WARNING: pngconf.h: check for missing prerequisite headers?
configure: WARNING: pngconf.h: proceeding with the preprocessor's result

configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for pngconf.h... yes
...
-----------------------------------------------------

The configure process runs to completion with no further warnings, but
the make fails as follows:
-----------------------------------------------------
...
/usr/ccs/bin/ld -G -h libwv-0.7.so.4 -o .libs/libwv-0.7.so.4.0.0
winmmap.lo sup
port.lo list.lo stylesheet.lo sprm.lo blip.lo utf.lo field.lo
decompresswmf.lo d
op.lo roman.lo fib.lo frd.lo atrd.lo sed.lo font.lo ffn.lo fld.lo bkf.lo
dttm.lo
 generic.lo error.lo unicode.lo sttbf.lo xst.lo fspa.lo fdoa.lo lst.lo
lvl.lo lf
o.lo filetime.lo chp.lo brc.lo anld.lo shd.lo dcs.lo numrm.lo asumyi.lo
version.
lo lspd.lo phe.lo tlp.lo tc.lo tap.lo pap.lo bintree.lo decode_simple.lo
pcd.lo
prm.lo clx.lo bte.lo bx.lo fkp.lo text.lo decode_complex.lo
wvTextEngine.lo wvHt
mlEngine.lo wvConfig.lo wvparse.lo reasons.lo sep.lo anlv.lo olst.lo
asumy.lo bk
d.lo bkl.lo dogrid.lo doptypography.lo pgd.lo rs.lo rr.lo tbd.lo
ftxbxs.lo wkb.l
o picf.lo crc32.lo md5.lo rc4.lo decrypt97.lo decrypt95.lo twips.lo
table.lo sym
bol.lo mtextra.lo fopt.lo fbse.lo escher.lo bmptopng.lo basename.lo
laolareplace
.lo -z allextract magick/.libs/libmagick.al libole2/.libs/libole2.al
oledecod/.l
ibs/liboledecod.al glib-wv/.libs/libglib.al expat/.libs/libexpat.al -z
defaultex
tract  -lpng -lz -lm -lc
ld: fatal: library -lpng: not found
ld: fatal: File processing errors. No output written to
.libs/libwv-0.7.so.4.0.0
make[2]: *** [libwv.la] Error 1
make[2]: Leaving directory `/export/home/software/wv-0.7.4'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/export/home/software/wv-0.7.4'
make: *** [all] Error 2
-----------------------------------------------------

./configure --version
wv configure 0.7.3
generated by GNU Autoconf 2.57

My platform is sparc/solaris 8.

I would be happy to furnish further information to help resolve this
issue.

Ted