ax_prog_perl_version

Makes sure that perl 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 $PERL is not set (for example by running AC_CHECK_PROG or AC_PATH_PROG),

Example:

  AC_PATH_PROG([PERL],[perl])
  AC_PROG_PERL_VERSION([5.8.0],[ ... ],[ ... ])

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

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

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

    AS_IF([test -n "$PERL"],[
        ax_perl_version="$1"

        AC_MSG_CHECKING([for perl version])
        changequote(<<,>>)
        perl_version=`$PERL --version 2>&1 | $GREP "This is perl" | $SED -e 's/.* v\([0-9]*\.[0-9]*\.[0-9]*\) .*/\1/'`
        changequote([,])
        AC_MSG_RESULT($perl_version)

        AC_SUBST([PERL_VERSION],[$perl_version])

        AX_COMPARE_VERSION([$ax_perl_version],[le],[$perl_version],[
            :
            $2
        ],[
            :
            $3
        ])
    ],[
        AC_MSG_WARN([could not find the perl interpreter])
        $3
    ])
])

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.