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ax_prog_ruby_version

Synopsis

AX_PROG_RUBY_VERSION([VERSION],[ACTION-IF-TRUE],[ACTION-IF-FALSE])

Description

Makes sure that ruby supports the version indicated. If true the shell commands in ACTION-IF-TRUE are executed. If not the shell commands in ACTION-IF-FALSE are run. Note if $RUBY is not set (for example by running AC_CHECK_PROG or AC_PATH_PROG),

Example:

  AC_PATH_PROG([RUBY],[ruby])
  AC_PROG_RUBY_VERSION([1.8.0],[ ... ],[ ... ])

This will check to make sure that the ruby you have supports at least version 1.6.0.

NOTE: This macro uses the $RUBY variable to perform the check. AX_WITH_RUBY can be used to set that variable prior to running this macro. The $RUBY_VERSION variable will be valorized with the detected version.

Author

Francesco Salvestrini <salvestrini@users.sourceforge.net>

Last Modified

2008-04-12

Cross References

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M4 Source Code

AC_DEFUN([AX_PROG_RUBY_VERSION],[
    AC_REQUIRE([AC_PROG_SED])
    AC_REQUIRE([AC_PROG_GREP])

    AS_IF([test -n "$RUBY"],[
        ax_ruby_version="$1"

        AC_MSG_CHECKING([for ruby version])
        changequote(<<,>>)
        ruby_version=`$RUBY --version 2>&1 | $GREP "^ruby " | $SED -e 's/^.* \([0-9]*\.[0-9]*\.[0-9]*\) .*/\1/'`
        changequote([,])
        AC_MSG_RESULT($ruby_version)

        AC_SUBST([RUBY_VERSION],[$ruby_version])

        AX_COMPARE_VERSION([$ax_ruby_version],[le],[$ruby_version],[
            :
            $2
        ],[
            :
            $3
        ])
    ],[
        AC_MSG_WARN([could not find the ruby interpreter])
        $3
    ])
])

License

Copyright © 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net>

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.