Error compiling cairo in 2.11.91

[Gonzalo Odiard <go turix com ar>]

Hello:
I am trying to compile garnome 2.11.91 in a Fedora Core 3.
I have the following error compiling cairo:
checking for a suitable PNG library... yes
checking for -lpng12  ... -lpng12  : unknown option
-lpng12  : unknown option
configure: error: Library requirements (-lpng12  ) not met; consider 
adjusting the PKG_CONFIG_PATH environment variable if your libraries are 
in a nonstandard prefix so pkg-config can find them.
make: *** [configure-work/main.d/cairo-0.9.0/configure] Error 1

Thanks to Paul, Joseph, Stef and all the Garnome boys, for your work!!

Gonzalo