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AX_CHECK_AWK_USER_DEFINED_FUNCTIONS([ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])
Check if AWK supports user defined functions. 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.
Francesco Salvestrini <salvestrini@users.sourceforge.net>
2007-02-13
AC_DEFUN([AX_CHECK_AWK_USER_DEFINED_FUNCTIONS],[ AC_REQUIRE([AX_NEED_AWK]) AC_MSG_CHECKING([if $AWK supports user defined functions]) ax_awk_command=`echo "" | $AWK 'function mydouble(x) { return 2*x ; } ; { print mydouble(1) ; }' 2> /dev/null` AS_IF([test $? -eq 0],[ AS_IF([test X"$ax_awk_command" = X"2"],[ AC_MSG_RESULT([yes]) $1 ],[ AC_MSG_RESULT([no]) $2 ]) ],[ AC_MSG_RESULT([no]) $2 ]) ])
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