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AX_CHECK_GD
Check for the gd library. (See http://www.boutell.com/gd/) If gd is found, the output variables GD_CFLAGS, GD_LDFLAGS and GD_LIBS will contain the compiler flags, linker flags and libraries necessary to use gd; otherwise, those variables will be empty. In addition, the symbol HAVE_GD is defined if the library is found, and the symbols HAVE_GD_GIF, HAVE_GD_JPEG and HAVE_GD_PNG are defined if the lirbary supports creating images in gif, jpeg and png formats, respectively.
The user may use --with-gd=no or --without-gd to skip checking for the library. (The default is --with-gd=yes.) If the library is installed in an unusual location, --with-gd=DIR will cause the macro to look for gdlib-config in DIR/bin or, failing that, for the headers and libraries in DIR/include and DIR/lib.
Feedback welcome!
http://autoconf-archive.cryp.to/ax_check_gd.m4
Copyright © 2008 Nick Markham <markhn@rpi.edu>
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.