# Autoconf check to look for Cairo Graphics Library.
#
# Usage:
#   AC_CAIRO(min-version, action-if-found, action-if-not-found)
# All parameters are optional.  If an appropriate version of Cairo is found,
# $CAIRO_LIBS and $CAIRO_CFLAGS will be set and substituted.


# Version 1
# by Jason Dorje Short
# Distributed under the same licence as Cairo.

AC_DEFUN([AC_CAIRO],
[
  if test "$1" != ""; then
    cairo_version_check_string=" ($1 or higher)"
  else
    cairo_version_check_string=""
  fi
  AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
  AC_CACHE_CHECK([for Cairo graphics library$cairo_version_check_string],
    [ac_cv_cairo_graphics],
    [
      if test "$PKG_CONFIG" = "no"; then
        AC_MSG_WARN([pkg-config is missing.])
        ac_cv_cairo_graphics=no
      else
        if test "$1" != ""; then
          if $PKG_CONFIG --atleast-version $1 cairo; then
            ac_cv_cairo_graphics=yes
          else
            ac_cv_cairo_graphics=no
          fi
        fi
      fi
    ])
  if test "$ac_cv_cairo_graphics" = "yes"; then
    CAIRO_LIBS=`$PKG_CONFIG --libs cairo`
    AC_SUBST($CAIRO_LIBS)
    CAIRO_CFLAGS=`$PKG_CONFIG --cflags cairo`
    AC_SUBST($CAIRO_CFLAGS)
    $2
  else
    CAIRO_LIBS=""
    CAIRO_CFLAGS=""
    $3
  fi
])