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Fix use of var before init in util.c
[perl5.git] / hints / linux.sh
CommitLineData
1aef975c 1# hints/linux.sh
a0d0e21e 2# Original version by rsanders
1fc4cb55 3# Additional support by Kenneth Albanowski <kjahds@kjahds.com>
1aef975c 4#
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5# ELF support by H.J. Lu <hjl@nynexst.com>
6# Additional info from Nigel Head <nhead@ESOC.bitnet>
7# and Kenneth Albanowski <kjahds@kjahds.com>
1aef975c 8#
232e078e 9# Consolidated by Andy Dougherty <doughera@lafcol.lafayette.edu>
1fc4cb55 10#
9bed9d38 11# Updated Thu Feb 8 11:56:10 EST 1996
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12
13# Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafcol.lafayette.edu>
14
15# Updated Fri Jun 21 11:07:54 EDT 1996
16# NDBM support for ELF renabled by <kjahds@kjahds.com>
232e078e 17
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18# No version of Linux supports setuid scripts.
19d_suidsafe='undef'
20d_dosuid='define'
21
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22# perl goes into the /usr tree. See the Filesystem Standard
23# available via anonymous FTP at tsx-11.mit.edu in
24# /pub/linux/docs/linux-standards/fsstnd.
16d20bd9 25# Allow a command line override, e.g. Configure -Dprefix=/foo/bar
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26case "$prefix" in
27'') prefix='/usr' ;;
28esac
1fc4cb55 29
16d20bd9 30# gcc-2.6.3 defines _G_HAVE_BOOL to 1, but doesn't actually supply bool.
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31ccflags="-Dbool=char -DHAS_BOOL $ccflags"
32
33# BSD compatability library no longer needed
34set `echo X "$libswanted "| sed -e 's/ bsd / /'`
35shift
36libswanted="$*"
1fc4cb55 37
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38# Configure may fail to find lstat() since it's a static/inline
39# function in <sys/stat.h>.
40d_lstat=define
1aef975c 41
16d20bd9 42# Explanation?
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43case "$usemymalloc" in
44'') usemymalloc='n' ;;
45esac
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46
47case "$optimize" in
48'') optimize='-O2' ;;
49esac
50
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51# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
52# for this test.
53cat >try.c <<'EOM'
54/* Test for whether ELF binaries are produced */
55#include <fcntl.h>
56#include <stdlib.h>
57main() {
58 char buffer[4];
59 int i=open("a.out",O_RDONLY);
60 if(i==-1)
61 exit(1); /* fail */
62 if(read(i,&buffer[0],4)<4)
63 exit(1); /* fail */
64 if(buffer[0] != 127 || buffer[1] != 'E' ||
65 buffer[2] != 'L' || buffer[3] != 'F')
66 exit(1); /* fail */
67 exit(0); /* succeed (yes, it's ELF) */
68}
69EOM
f0b7e567 70if ${cc:-gcc} try.c >/dev/null 2>&1 && ./a.out; then
ef0c9946 71 cat <<'EOM' >&4
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72
73You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 74If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 75EOM
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76
77#For RedHat Linux 3.0.3, you may need to fetch
78# ftp://ftp.redhat.com/pub/redhat-3.0.3/i386/updates/RPMS/ld.so-1.7.14-3.i386.rpm
79#
80
232e078e 81else
ef0c9946 82 cat <<'EOM' >&4
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83
84You don't have an ELF gcc. I will use dld if possible. If you are
85using a version of DLD earlier than 3.2.6, or don't have it at all, you
86should probably upgrade. If you are forced to use 3.2.4, you should
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87uncomment a couple of lines in hints/linux.sh and restart Configure so
88that shared libraries will be disallowed.
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89
90EOM
232e078e 91 lddlflags="-r $lddlflags"
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92 # These empty values are so that Configure doesn't put in the
93 # Linux ELF values.
94 ccdlflags=' '
95 cccdlflags=' '
c07a80fd 96 ccflags="-DOVR_DBL_DIG=14 $ccflags"
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97 so='sa'
98 dlext='o'
a5f75d66 99 nm_so_opt=' '
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100 ## If you are using DLD 3.2.4 which does not support shared libs,
101 ## uncomment the next two lines:
102 #ldflags="-static"
103 #so='none'
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104
105 # In addition, on some systems there is a problem with perl and NDBM
106 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
107 # in the tests as AnyDBM just freezing. Apparently, this only
108 # happens on a.out systems, so we disable NDBM for all a.out linux
109 # systems. If someone can suggest a more robust test
110 # that would be appreciated.
111 #
112 # More info:
113 # Date: Wed, 7 Feb 1996 03:21:04 +0900
114 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
115 #
116 # I tried compiling with DBM support and sure enough things locked up
117 # just as advertised. Checking into it, I found that the lockup was
118 # during the call to dbm_open. Not *in* dbm_open -- but between the call
119 # to and the jump into.
120 #
121 # To make a long story short, making sure that the *.a and *.sa pairs of
122 # /usr/lib/lib{m,db,gdbm}.{a,sa}
123 # were perfectly in sync took care of it.
124 #
125 # This will generate a harmless Whoa There! message
126 case "$d_dbm_open" in
127 '') cat <<'EOM' >&4
128
129Disabling ndbm. This will generate a Whoa There message in Configure.
130Read hints/linux.sh for further information.
131EOM
132 # You can override this with Configure -Dd_dbm_open
133 d_dbm_open=undef
134 ;;
135 esac
232e078e 136fi
a0d0e21e 137
c2960299 138rm -f try.c a.out
16d20bd9 139
c2960299 140if /bin/bash -c exit; then
ef0c9946 141 echo
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142 echo You appear to have a working bash. Good.
143else
ef0c9946 144 cat << 'EOM' >&4
a0d0e21e 145
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146*********************** Warning! *********************
147It would appear you have a defective bash shell installed. This is likely to
148give you a failure of op/exec test #5 during the test phase of the build,
149Upgrading to a recent version (1.14.4 or later) should fix the problem.
150******************************************************
a0d0e21e 151EOM
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152
153fi
16d20bd9 154
232e078e 155