Building ImageMagick on OSX Lion and can't link libpng
Q:
I am trying to build ImageMagick 6.8.0-5 on OSX Lion with support for libpng. I am just using the standard ./configure make make install procedure.
I succeed in compiling when I do not reference libpng.
How can I fix this to add libpng support?
A:
You'll need to tell ImageMagick where to locate libpng. Luckily,
You can get the link-library option form your local libpng install with the
I succeed in compiling when I do not reference libpng.
./configure --with-png=no
make
./configure --with-png=yes
make
/usr/bin/nm: no name list
ld: warning: cannot export hidden symbol _SyncImagePixelCache from magick/.libs/magick_libMagickCore_la-cache.o
ld: warning: cannot export hidden symbol _ResetQuantumState from magick/.libs/magick_libMagickCore_la-quantum.o
Undefined symbols for architecture x86_64:
"_png_set_check_for_invalid_index", referenced from:
_WriteOnePNGImage in magick_libMagickCore_la-png.o
_ReadOnePNGImage in magick_libMagickCore_la-png.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[1]: *** [magick/libMagickCore.la] Error 1
make: *** [all] Error 2
How can I fix this to add libpng support?
A:
You'll need to tell ImageMagick where to locate libpng. Luckily,
libpng ships with a configuration script entitled "libpng-config".You can get the link-library option form your local libpng install with the
--L_opts flag.libpng-config --L_opts
# Use the returned value for the LDFLAGS
./configure LDFLAGS='-L/usr/local/lib'
libpng-config returns with a message 'command not found', you'll need to ensure your libpng is installed correctly, and can be located in your shell environment. Often, this can be as simple as adding a custom path to your PATH variable.export PATH="$PATH:/usr/local/bin"