ax_check_awk__v

Check if AWK supports -v option ($AWK -v var=val '<PROGRAM>'). If successful execute ACTION-IF-SUCCESS otherwise ACTION-IF-FAILURE.

This work is heavily based upon testawk.sh script by Heiner Steven. You should find his script (and related works) at <http://www.shelldorado.com/articles/awkcompat.html>. Thanks to Alessandro Massignan for his suggestions and extensive nawk tests on FreeBSD.

AC_DEFUN([AX_CHECK_AWK__V],[
  AC_REQUIRE([AX_NEED_AWK])

  AC_MSG_CHECKING([if $AWK supports -v option])

  ax_try_awk_output=`echo "" | $AWK -v variable=A '{ print variable; }' 2> /dev/null`
  AS_IF([test $? -eq 0],[
    AS_IF([test "X$ax_try_awk_output" = "XA"],[
      AC_MSG_RESULT([yes])
      $1
    ],[
      AC_MSG_RESULT([no])
      $2
    ])
  ],[
    AC_MSG_RESULT([no])
    $2
  ])
])

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