83 lines
2.8 KiB
Plaintext
83 lines
2.8 KiB
Plaintext
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# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_check_gd.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_CHECK_GD
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#
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# DESCRIPTION
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#
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# Check for the gd library. (See http://www.boutell.com/gd/) If gd is
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# found, the output variables GD_CFLAGS, GD_LDFLAGS and GD_LIBS will
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# contain the compiler flags, linker flags and libraries necessary to use
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# gd; otherwise, those variables will be empty. In addition, the symbol
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# HAVE_GD is defined if the library is found, and the symbols HAVE_GD_GIF,
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# HAVE_GD_JPEG and HAVE_GD_PNG are defined if the lirbary supports
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# creating images in gif, jpeg and png formats, respectively.
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#
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# The user may use --with-gd=no or --without-gd to skip checking for the
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# library. (The default is --with-gd=yes.) If the library is installed in
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# an unusual location, --with-gd=DIR will cause the macro to look for
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# gdlib-config in DIR/bin or, failing that, for the headers and libraries
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# in DIR/include and DIR/lib.
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#
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# Feedback welcome!
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#
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# LICENSE
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#
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# Copyright (c) 2008 Nick Markham <markhn@rpi.edu>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 8
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AC_DEFUN([AX_CHECK_GD], [
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AC_ARG_WITH(gd,
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AS_HELP_STRING([--with-gd(=DIR)], [use the gd library (in DIR)]),,
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with_gd=yes)
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if test "$with_gd" != no; then
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AC_PATH_PROG(GDLIB_CONFIG, gdlib-config, , [$with_gd/bin:$PATH])
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if test -n "$GDLIB_CONFIG"; then
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GD_CFLAGS=`$GDLIB_CONFIG --cflags`
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GD_LDFLAGS=`$GDLIB_CONFIG --ldflags`
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GD_LIBS=`$GDLIB_CONFIG --libs`
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elif test -d "$with_gd"; then
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GD_CFLAGS="-I$with_gd/include"
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GD_LDFLAGS="-L$with_gd/lib"
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AC_CHECK_LIB(z, inflateReset, GD_LIBS="-lz")
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AC_CHECK_LIB(png, png_check_sig, GD_LIBS="-lpng $GD_LIBS", , $GD_LIBS)
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fi
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save_CFLAGS="$CFLAGS"
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CFLAGS="$GD_CFLAGS $CFLAGS"
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$GD_LDFLAGS $LDFLAGS"
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AC_CHECK_LIB(gd, gdImageCreate, [
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AC_DEFINE(HAVE_GD, 1, [ Define if you have gd library. ])
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AC_CHECK_LIB(gd, gdImageGif, AC_DEFINE(HAVE_GD_GIF, 1, [ Define if GD supports gif. ]), , "$GD_LIBS")
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AC_CHECK_LIB(gd, gdImageJpeg, AC_DEFINE(HAVE_GD_JPEG, 1, [ Define if GD supports jpeg. ]), , "$GD_LIBS")
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AC_CHECK_LIB(gd, gdImagePng, AC_DEFINE(HAVE_GD_PNG, 1, [ Define if GD supports png. ]), , "$GD_LIBS")
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GD_LIBS="-lgd $GD_LIBS"
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], with_gd=no, $GD_LIBS)
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CFLAGS="$save_CFLAGS"
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LDFLAGS="$save_LDFLAGS"
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fi
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if test "$with_gd" = "no"; then
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GD_CFLAGS="";
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GD_LDFLAGS="";
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GD_LIBS="";
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fi
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AC_SUBST(GD_CFLAGS)
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AC_SUBST(GD_LDFLAGS)
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AC_SUBST(GD_LIBS)
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])
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