[tex-live] dvipdfmx depends on system libpng

[Vladimir Volovich]

Hi!

while building texlive, i got an error like this:

make[5]: Entering directory `/home/vvv/src/tl2005/Work/TeX/texk/dvipdfmx/src'
if gcc -DHAVE_CONFIG_H -I. -I../../../../../TeX/texk/dvipdfmx/src -I..   -I../../../texk -I../../../../../TeX/texk/dvipdfmx/../../texk  -g -O2  -MT pngimage.o -MD -MP -MF ".deps/pngimage.Tpo" -c -o pngimage.o ../../../../../TeX/texk/dvipdfmx/src/pngimage.c; \
then mv -f ".deps/pngimage.Tpo" ".deps/pngimage.Po"; else rm -f ".deps/pngimage.Tpo"; exit 1; fi
../../../../../TeX/texk/dvipdfmx/src/pngimage.c:75:17: png.h: No such file or directory

but texlive does include libpng; do apparently dvipdfmx doesn't use
the library provided with the texlive sources, and depends on system
libpng.

that is not a problem to install libpng development package, but it is
a bug that texlive sources include libpng but some of the programs
nevertheless require system libpng: either they shall use texlive's
dvipng, or texlive shall not include libpng, and use OS-provided
libpng.

Best,
v.