Build Problem

[d.henman]

Platform: cygwin    1.5.24-2 
     gcc: gcc (GCC) 4.1.3 20070723 (prerelease)   (and same results with )
     gcc: gcc (GCC) 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)


I get the following error message.
----------------
checking png.h usability... no
checking png.h presence... no
checking for png.h... no
checking libpng/png.h usability... no
checking libpng/png.h presence... no
checking for libpng/png.h... no
checking tiffio.h usability... yes
checking tiffio.h presence... yes
checking for tiffio.h... yes
checking for TIFFGetVersion in -ltiff... yes
checking gif_lib.h usability... yes
checking gif_lib.h presence... yes
checking for gif_lib.h... yes
checking for EGifPutExtensionLast in -lgif... no
checking for EGifPutExtensionLast in -lungif... yes
configure: error: The following required libraries was not found:
     libpng
Maybe some development libraries/packages are missing?

----------------

But, I have  .... /usr/include/libpng12/png.h

And I have the following
    /bin/libpng-config  /bin/libpng12-config
    /bin/cygpng12.dll

    /lib/libpng.a -> /etc/alternatives/libpng.a
    /lib/libpng.dll.a -> /etc/alternatives/libpng.dll.a

    /lib/libpng12.a  
    /lib/libpng12.dll.a


----

I assume that I have everything needed to build emacs correctly and in fact
could about one month ago, June 17th.

Any suggestions on how to fix this....  I can only think of making 
symbolic links without the 12 version for all such named files.  

Regards,
    Darel