ax_ruby_devel

This macro checks for Ruby and tries to get the include path to 'ruby.h'. It provides the $(RUBY_CPPFLAGS) and $(RUBY_LDFLAGS) output variables. It also exports $(RUBY_EXTRA_LIBS) for embedding Ruby in your code.

You can search for some particular version of Ruby by passing a parameter to this macro, for example "1.8.6".

AC_DEFUN([AX_RUBY_DEVEL],[
    AC_REQUIRE([AX_WITH_RUBY])
    AS_IF([test -n "$1"], [AX_PROG_RUBY_VERSION([$1])])

    #
    # Check if you have mkmf, else fail
    #
    AC_MSG_CHECKING([for the mkmf Ruby package])
    ac_mkmf_result=`$RUBY -rmkmf -e ";" 2>&1`
    if test -z "$ac_mkmf_result"; then
        AC_MSG_RESULT([yes])
    else
        AC_MSG_RESULT([no])
        AC_MSG_ERROR([cannot import Ruby module "mkmf".
Please check your Ruby installation. The error was:
$ac_distutils_result])
    fi

    #
    # Check for Ruby include path
    #
    AC_MSG_CHECKING([for Ruby include path])
    if test -z "$RUBY_CPPFLAGS"; then
        ruby_path=`$RUBY -rmkmf -e 'print Config::CONFIG[["archdir"]]'`
        if test -n "${ruby_path}"; then
                ruby_path="-I$ruby_path"
        fi
        RUBY_CPPFLAGS=$ruby_path
    fi
    AC_MSG_RESULT([$RUBY_CPPFLAGS])
    AC_SUBST([RUBY_CPPFLAGS])

    #
    # Check for Ruby library path
    #
    AC_MSG_CHECKING([for Ruby library path])
    if test -z "$RUBY_LDFLAGS"; then
        RUBY_LDFLAGS=`$RUBY -rmkmf -e 'print Config::CONFIG[["LIBRUBYARG_SHARED"]]'`
    fi
    AC_MSG_RESULT([$RUBY_LDFLAGS])
    AC_SUBST([RUBY_LDFLAGS])

    #
    # Check for site packages
    #
    AC_MSG_CHECKING([for Ruby site-packages path])
    if test -z "$RUBY_SITE_PKG"; then
        RUBY_SITE_PKG=`$RUBY -rmkmf -e 'print Config::CONFIG[["sitearchdir"]]'`
    fi
    AC_MSG_RESULT([$RUBY_SITE_PKG])
    AC_SUBST([RUBY_SITE_PKG])

    #
    # libraries which must be linked in when embedding
    #
    AC_MSG_CHECKING(ruby extra libraries)
    if test -z "$RUBY_EXTRA_LIBS"; then
       RUBY_EXTRA_LIBS=`$RUBY -rmkmf -e 'print Config::CONFIG[["SOLIBS"]]'`
    fi
    AC_MSG_RESULT([$RUBY_EXTRA_LIBS])
    AC_SUBST(RUBY_EXTRA_LIBS)

    #
    # linking flags needed when embedding
    # (is it even needed for Ruby?)
    #
    # AC_MSG_CHECKING(ruby extra linking flags)
    # if test -z "$RUBY_EXTRA_LDFLAGS"; then
    # RUBY_EXTRA_LDFLAGS=`$RUBY -rmkmf -e 'print Config::CONFIG[["LINKFORSHARED"]]'`
    # fi
    # AC_MSG_RESULT([$RUBY_EXTRA_LDFLAGS])
    # AC_SUBST(RUBY_EXTRA_LDFLAGS)

    # this flags breaks ruby.h, and is sometimes defined by KDE m4 macros
    CFLAGS="`echo "$CFLAGS" | sed -e 's/-std=iso9899:1990//g;'`"
    #
    # final check to see if everything compiles alright
    #
    AC_MSG_CHECKING([consistency of all components of ruby development environment])
    AC_LANG_PUSH([C])
    # save current global flags
    ac_save_LIBS="$LIBS"
    LIBS="$ac_save_LIBS $RUBY_LDFLAGS"
    ac_save_CPPFLAGS="$CPPFLAGS"
    CPPFLAGS="$ac_save_CPPFLAGS $RUBY_CPPFLAGS"
    AC_TRY_LINK([
        #include <ruby.h>
    ],[
        ruby_init();
    ],[rubyexists=yes],[rubyexists=no])

    AC_MSG_RESULT([$rubyexists])

    if test ! "$rubyexists" = "yes"; then
       AC_MSG_ERROR([
  Could not link test program to Ruby. Maybe the main Ruby library has been
  installed in some non-standard library path. If so, pass it to configure,
  via the LDFLAGS environment variable.
  Example: ./configure LDFLAGS="-L/usr/non-standard-path/ruby/lib"
  ============================================================================
   ERROR!
   You probably have to install the development version of the Ruby package
   for your distribution.  The exact name of this package varies among them.
  ============================================================================
       ])
      RUBY_VERSION=""
    fi
    AC_LANG_POP
    # turn back to default flags
    CPPFLAGS="$ac_save_CPPFLAGS"
    LIBS="$ac_save_LIBS"

    #
    # all done!
    #
])

Copyright © 2008 Rafal Rzepecki <divided.mind@gmail.com>
Copyright © 2008 Sebastian Huber <sebastian-huber@web.de>
Copyright © 2008 Alan W. Irwin <irwin@beluga.phys.uvic.ca>
Copyright © 2008 Rafael Laboissiere <rafael@laboissiere.net>
Copyright © 2008 Andrew Collier <colliera@ukzn.ac.za>
Copyright © 2008 Matteo Settenvini <matteo@member.fsf.org>
Copyright © 2008 Horst Knorr <hk_classes@knoda.org>

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts, even though portions of the text of the Macro appear in them. The GNU General Public License (GPL) does govern all other use of the material that constitutes the Autoconf Macro.

This special exception to the GPL applies to versions of the Autoconf Macro released by the Autoconf Macro Archive. When you make and distribute a modified version of the Autoconf Macro, you may extend this special exception to the GPL to apply to your modified version as well.