mknative.common revision 1.4 
1#	$NetBSD: mknative.common,v 1.4 2006/05/12 02:07:59 mrg Exp $
2#
3# from: NetBSD: mknative,v 1.12 2003/03/05 06:17:17 mrg Exp
4#
5# shell-fragment common to all "mknative" scripts
6
7bomb()
8{
9	echo >&2 "ABORT: $*"
10	exit 1
11}
12
13# Make sure we can run OK.
14if [ -x "$MAKE" ]; then
15	:
16else
17	bomb "MAKE not set"
18fi
19
20# usage: getvars MAKEFILE VARNAME [VARNAME...]
21#
22getvars()
23{
24	_mf="$1"; shift
25	case "$MAKE" in
26	*gmake)
27	env MAKEFLAGS= $MAKE -f - -f "$_TMPDIR/$_mf" _x_ <<EOF || bomb "getvars $_mf $* failed"
28define echo_var
29	@echo G_\${var}=\${\${var}} | sed -e 's,\([^\.]\)\./\([a-zA-Z0-9_-]*\.o\),\1\2,g' -e 's,$_VPATH,\$\${GNUHOSTDIST},g'
30
31endef
32_x_:
33	\$(foreach var,$*,\$(echo_var))
34EOF
35		;;
36	*)
37	$MAKE -f - _x_ <<EOF || bomb "getvars $_mf $* failed"
38_x_:
39.for var in $*
40	@echo G_\${var}=\${\${var}:Q} | sed -e 's,\([^\.]\)\./\([a-zA-Z0-9_-]*\.o\),\1\2,g' -e 's,$_VPATH,\$\${GNUHOSTDIST},g'
41.endfor
42.include "$_TMPDIR/$_mf"
43EOF
44	;;
45	esac
46}
47
48# usage: write_c FILENAME
49#
50write_c()
51{
52	echo '/* This file is automatically generated.  DO NOT EDIT! */' >$_TOP/$1.tmp || \
53		bomb "cannot create $1"
54	grep '$''NetBSD' $0 | sed 's,[#$],,g;s,.*,/* Generated from: & */,' >>$_TOP/$1.tmp
55	echo '' >>$_TOP/$1.tmp
56	writefile $1
57}
58
59# usage: write_mk FILENAME
60#
61write_mk()
62{
63	echo '# This file is automatically generated.  DO NOT EDIT!' >$_TOP/$1.tmp || \
64		bomb "cannot create $1"
65	grep '$''NetBSD' $0 | sed 's,[#$],,g;s,.*,# Generated from: &,' >>$_TOP/$1.tmp
66	echo '#' >>$_TOP/$1.tmp
67	writefile $1
68}
69
70writefile()
71{
72	sed -e 's,netbsd\(elf\)*1[0-9\.]*\(_\)*[A-Z]*,netbsd\1,' \
73	    -e 's,^/\* #undef HAVE_MMAP \*/$,#define HAVE_MMAP 1,' \
74	    >>$_TOP/$1.tmp
75
76		# Compare new file, sans "generated from" comments and RCS Id,
77		# to old file.  If they match, don't change anything.
78	rm -f $_TMPDIR/.1 $_TMPDIR/.2
79	grep -v 'Generated from:' $_TOP/$1 >$_TMPDIR/.1 2>/dev/null
80	grep -v 'Generated from:' $_TOP/$1.tmp >$_TMPDIR/.2
81
82		# will not overwrite a file that has the same content
83	if cmp $_TMPDIR/.1 $_TMPDIR/.2 >/dev/null 2>&1; then
84		rm -f $_TOP/$1.tmp
85	else
86		echo >&2 "$1 changed"
87		mv -f $_TOP/$1.tmp $_TOP/$1
88	fi
89}
90