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The metaconfig unit change for #10071.
[metaconfig.git] / U / modified / Oldsym.U
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1?RCS: $Id: Oldsym.U,v 3.0.1.1 1997/02/28 15:06:58 ram Exp $
2?RCS:
3?RCS: Copyright (c) 1991-1993, Raphael Manfredi
4?RCS:
5?RCS: You may redistribute only under the terms of the Artistic Licence,
6?RCS: as specified in the README file that comes with the distribution.
7?RCS: You may reuse parts of this distribution only within the terms of
8?RCS: that same Artistic Licence; a copy of which may be found at the root
9?RCS: of the source tree for dist 3.0.
10?RCS:
11?RCS: $Log: Oldsym.U,v $
12?RCS: Revision 3.0.1.1 1997/02/28 15:06:58 ram
13?RCS: patch61: added support for src.U
14?RCS:
15?RCS: Revision 3.0 1993/08/18 12:05:13 ram
16?RCS: Baseline for dist 3.0 netwide release.
17?RCS:
18?X:
19?X: This unit follows the creation of the config.sh file. It adds some
20?X: special symbols: defines from patchlevel.h file if any and CONFIGDOTSH,
21?X: which is set to true. Then, we try to keep all the new symbols that
22?X: may come from a hint file or a previous config.sh file.
23?X:
a3e4b67c 24?MAKE:Oldsym: Config_sh cat test hint src sort uniq
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25?MAKE: -pick add $@ %<
26?T:CONFIGDOTSH sym tmp s
27?X: Command line options can be saved by the Options.U unit in the
28?X: temporary file UU/cmdline.opt.
29: Add in command line options if available
30$test -f UU/cmdline.opt && $cat UU/cmdline.opt >> config.sh
31
32: add special variables
33$test -f $src/patchlevel.h && \
34awk '/^#define[ ]+PERL_/ {printf "%s=%s\n",$2,$3}' $src/patchlevel.h >>config.sh
35echo "CONFIGDOTSH=true" >>config.sh
36
37: propagate old symbols
38if $test -f UU/config.sh; then
39?X: Make sure each symbol is unique in oldconfig.sh
a3e4b67c 40 <UU/config.sh $sort | $uniq >UU/oldconfig.sh
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41?X:
42?X: All the symbols that appear twice come only from config.sh (hence the
43?X: two config.sh in the command line). These symbols will be removed by
44?X: the uniq -u command. The oldsyms file thus contains all the symbols
45?X: that did not appear in the produced config.sh (Larry Wall).
46?X:
02fb3c6e 47?X: Do not touch the -u flag of uniq. This means you too, Jarkko.
959f3c4c 48 sed -n 's/^\([a-zA-Z_0-9]*\)=.*/\1/p' config.sh config.sh UU/oldconfig.sh |\
02fb3c6e 49 $sort | $uniq -u >UU/oldsyms
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50 set X `cat UU/oldsyms`
51 shift
52 case $# in
53 0) ;;
54 *)
55 cat <<EOM
56Hmm...You had some extra variables I don't know about...I'll try to keep 'em...
57EOM
58 echo "# Variables propagated from previous config.sh file." >>config.sh
59 for sym in `cat UU/oldsyms`; do
60 echo " Propagating $hint variable "'$'"$sym..."
61 eval 'tmp="$'"${sym}"'"'
62 echo "$tmp" | \
63 sed -e "s/'/'\"'\"'/g" -e "s/^/$sym='/" -e "s/$/'/" >>config.sh
64 done
65 ;;
66 esac
67fi
68