summaryrefslogtreecommitdiff
path: root/m4/ax_check_awk__x_escapes.m4
blob: e7d96c8ba404bdfd6917ffd321b89d7b203e71a6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
# ===========================================================================
#     http://www.nongnu.org/autoconf-archive/ax_check_awk__x_escapes.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_CHECK_AWK__X_ESCAPES([ACTION-IF-SUCCESS],[ACTION-IF-FAILURE])
#
# DESCRIPTION
#
#   Check if AWK supports \x escape codes. 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.
#
# LICENSE
#
#   Copyright (c) 2009 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.

AC_DEFUN([AX_CHECK_AWK__X_ESCAPES], [
  AX_TRY_AWK_EXPOUT([\x escapes],
    [],[ if ( "\x41" != "A" ) exit (1) ],[],
    [$1],[$2])
])