Commit | Line | Data |
---|---|---|
959f3c4c JH |
1 | ?RCS: $Id: startperl.U,v 3.0 1993/08/18 12:09:50 ram Exp $ |
2 | ?RCS: | |
3 | ?RCS: Copyright (c) 1991-1993, Raphael Manfredi | |
0df14132 | 4 | ?RCS: |
959f3c4c JH |
5 | ?RCS: This file is included with or a derivative work of a file included |
6 | ?RCS: with the metaconfig program of Raphael Manfredi's "dist" distribution. | |
7 | ?RCS: In accordance with clause 7 of dist's modified Artistic License: | |
0df14132 | 8 | ?RCS: |
959f3c4c JH |
9 | ?RCS: You may distribute under the terms of either the GNU General Public |
10 | ?RCS: License or the Artistic License, as specified in the README file. | |
11 | ?RCS: | |
12 | ?RCS: $Log: startperl.U,v $ | |
13 | ?RCS: Perl5 version -- I always have d_portable=define. | |
14 | ?RCS: | |
15 | ?RCS: Revision 3.0 1993/08/18 12:09:50 ram | |
16 | ?RCS: Baseline for dist 3.0 netwide release. | |
17 | ?RCS: | |
0df14132 MB |
18 | ?MAKE:startperl: cat Myread sharpbang initialinstalllocation test \ |
19 | versiononly version | |
959f3c4c JH |
20 | ?MAKE: -pick add $@ %< |
21 | ?Y:TOP | |
22 | ?X: This is different from dist's standard startperl.U unit because | |
23 | ?X: we can't directly test #!/usr/local/bin/perl (or whatever) because | |
24 | ?X: we haven't built and installed perl yet. | |
25 | ?S:startperl: | |
26 | ?S: This variable contains the string to put on the front of a perl | |
27 | ?S: script to make sure (hopefully) that it runs with perl and not some | |
28 | ?S: shell. Of course, that leading line must be followed by the classical | |
29 | ?S: perl idiom: | |
30 | ?S: eval 'exec perl -S $0 ${1+"$@"}' | |
31 | ?S: if $running_under_some_shell; | |
32 | ?S: to guarantee perl startup should the shell execute the script. Note | |
4dd7201d | 33 | ?S: that this magic incantation is not understood by csh. |
959f3c4c JH |
34 | ?S:. |
35 | ?C:STARTPERL: | |
36 | ?C: This variable contains the string to put in front of a perl | |
37 | ?C: script to make sure (one hopes) that it runs with perl and not | |
38 | ?C: some shell. | |
39 | ?C:. | |
40 | ?H:#define STARTPERL "$startperl" /**/ | |
41 | ?H:. | |
42 | : figure out how to guarantee perl startup | |
0df14132 MB |
43 | : XXX Note that this currently takes advantage of the bug that binexp ignores |
44 | : the Configure -Dinstallprefix setting, which in turn means that under | |
45 | : relocatable @INC, initialinstalllocation is what binexp started as. | |
959f3c4c JH |
46 | case "$startperl" in |
47 | '') | |
48 | case "$sharpbang" in | |
49 | *!) | |
50 | $cat <<EOH | |
51 | ||
52 | I can use the #! construct to start perl on your system. This will | |
53 | make startup of perl scripts faster, but may cause problems if you | |
54 | want to share those scripts and perl is not in a standard place | |
0df14132 MB |
55 | ($initialinstalllocation/perl) on all your platforms. The alternative |
56 | is to force a shell by starting the script with a single ':' character. | |
959f3c4c JH |
57 | |
58 | EOH | |
b02f6d15 | 59 | case "$versiononly" in |
0df14132 MB |
60 | "$define") dflt="$initialinstalllocation/perl$version";; |
61 | *) dflt="$initialinstalllocation/perl";; | |
b02f6d15 | 62 | esac |
959f3c4c JH |
63 | rp='What shall I put after the #! to start up perl ("none" to not use #!)?' |
64 | . ./myread | |
65 | case "$ans" in | |
66 | none) startperl=": # use perl";; | |
67 | *) startperl="#!$ans" | |
68 | if $test 30 -lt `echo "$ans" | wc -c`; then | |
69 | $cat >&4 <<EOM | |
70 | ||
71 | WARNING: Some systems limit the #! command to 32 characters. | |
72 | If you experience difficulty running Perl scripts with #!, try | |
73 | installing Perl in a directory with a shorter pathname. | |
74 | ||
75 | EOM | |
76 | fi ;; | |
77 | esac | |
78 | ;; | |
79 | *) startperl=": # use perl" | |
80 | ;; | |
81 | esac | |
82 | ;; | |
83 | esac | |
84 | echo "I'll use $startperl to start perl scripts." | |
85 |