include/MKncurses_def.sh

#! /bin/sh
# $Id: MKncurses_def.sh,v 1.5 2022/07/16 17:03:59 tom Exp $
##############################################################################
# Copyright 2020,2022 Thomas E. Dickey                                       #
# Copyright 2000,2003 Free Software Foundation, Inc.                         #
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##############################################################################
#
# MKncurses_def.sh -- generate fallback definitions for ncurses_cfg.h
#
# Author: Thomas E. Dickey 2000
#
# Given the choice between constructs such as
#
#	#if defined(foo) && foo
#	#if foo
#
# we chose the latter.  It is guaranteed by the language standard, and there
# appear to be no broken compilers that do not honor that detail.  But some
# people want to use gcc's -Wundef option (corresponding to one of the less
# useful features in Watcom's compiler) to check for misspellings.  So we
# generate a set of fallback definitions to quiet the warnings without making
# the code ugly.
#
DEFS="${1-ncurses_defs}"
cat <<EOF
/*
 * This file is generated by $0
 */

#ifndef NC_DEFINE_H
#define NC_DEFINE_H 1

EOF

"${AWK-awk}" <"$DEFS" '
!/^[@#]/ {
	if ( NF == 1 )
	{
		print "#ifndef", $1
		print "#define", $1, "0"
		print "#endif"
		print ""
	} else if ( NF != 0 ) {
		print "#ifndef", $1
		printf "#define"
		for (n = 1; n <= NF; n++) {
			printf " %s", $n
		}
		print ""
		print "#endif"
		print ""
	}
}
END	{
print "#endif /* NC_DEFINE_H */"
	}
'