This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Eliminate PerlIO warnings when setting cnt to -1
[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#
232e078e
AD
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
ef0c9946
PP
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
AD
17
18# perl goes into the /usr tree. See the Filesystem Standard
19# available via anonymous FTP at tsx-11.mit.edu in
20# /pub/linux/docs/linux-standards/fsstnd.
16d20bd9 21# Allow a command line override, e.g. Configure -Dprefix=/foo/bar
232e078e
AD
22case "$prefix" in
23'') prefix='/usr' ;;
24esac
1fc4cb55 25
16d20bd9 26# gcc-2.6.3 defines _G_HAVE_BOOL to 1, but doesn't actually supply bool.
4bf4dbb3
PP
27ccflags="-Dbool=char -DHAS_BOOL $ccflags"
28
29# BSD compatability library no longer needed
30set `echo X "$libswanted "| sed -e 's/ bsd / /'`
31shift
32libswanted="$*"
1fc4cb55 33
232e078e
AD
34# Configure may fail to find lstat() since it's a static/inline
35# function in <sys/stat.h>.
36d_lstat=define
1aef975c 37
16d20bd9 38# Explanation?
c07a80fd
PP
39case "$usemymalloc" in
40'') usemymalloc='n' ;;
41esac
1aef975c
AD
42
43case "$optimize" in
44'') optimize='-O2' ;;
45esac
46
232e078e
AD
47# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
48# for this test.
49cat >try.c <<'EOM'
50/* Test for whether ELF binaries are produced */
51#include <fcntl.h>
52#include <stdlib.h>
53main() {
54 char buffer[4];
55 int i=open("a.out",O_RDONLY);
56 if(i==-1)
57 exit(1); /* fail */
58 if(read(i,&buffer[0],4)<4)
59 exit(1); /* fail */
60 if(buffer[0] != 127 || buffer[1] != 'E' ||
61 buffer[2] != 'L' || buffer[3] != 'F')
62 exit(1); /* fail */
63 exit(0); /* succeed (yes, it's ELF) */
64}
65EOM
f0b7e567 66if ${cc:-gcc} try.c >/dev/null 2>&1 && ./a.out; then
ef0c9946 67 cat <<'EOM' >&4
232e078e
AD
68
69You appear to have ELF support. I'll try to use it for dynamic loading.
ef0c9946 70If dynamic loading doesn't work, read hints/linux.sh for further information.
232e078e 71EOM
ef0c9946
PP
72
73#For RedHat Linux 3.0.3, you may need to fetch
74# ftp://ftp.redhat.com/pub/redhat-3.0.3/i386/updates/RPMS/ld.so-1.7.14-3.i386.rpm
75#
76
232e078e 77else
ef0c9946 78 cat <<'EOM' >&4
16d20bd9
AD
79
80You don't have an ELF gcc. I will use dld if possible. If you are
81using a version of DLD earlier than 3.2.6, or don't have it at all, you
82should probably upgrade. If you are forced to use 3.2.4, you should
c2960299
AD
83uncomment a couple of lines in hints/linux.sh and restart Configure so
84that shared libraries will be disallowed.
16d20bd9
AD
85
86EOM
232e078e 87 lddlflags="-r $lddlflags"
5d94fbed
AD
88 # These empty values are so that Configure doesn't put in the
89 # Linux ELF values.
90 ccdlflags=' '
91 cccdlflags=' '
c07a80fd 92 ccflags="-DOVR_DBL_DIG=14 $ccflags"
1aef975c
AD
93 so='sa'
94 dlext='o'
a5f75d66 95 nm_so_opt=' '
1aef975c
AD
96 ## If you are using DLD 3.2.4 which does not support shared libs,
97 ## uncomment the next two lines:
98 #ldflags="-static"
99 #so='none'
ef0c9946
PP
100
101 # In addition, on some systems there is a problem with perl and NDBM
102 # which causes AnyDBM and NDBM_File to lock up. This is evidenced
103 # in the tests as AnyDBM just freezing. Apparently, this only
104 # happens on a.out systems, so we disable NDBM for all a.out linux
105 # systems. If someone can suggest a more robust test
106 # that would be appreciated.
107 #
108 # More info:
109 # Date: Wed, 7 Feb 1996 03:21:04 +0900
110 # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
111 #
112 # I tried compiling with DBM support and sure enough things locked up
113 # just as advertised. Checking into it, I found that the lockup was
114 # during the call to dbm_open. Not *in* dbm_open -- but between the call
115 # to and the jump into.
116 #
117 # To make a long story short, making sure that the *.a and *.sa pairs of
118 # /usr/lib/lib{m,db,gdbm}.{a,sa}
119 # were perfectly in sync took care of it.
120 #
121 # This will generate a harmless Whoa There! message
122 case "$d_dbm_open" in
123 '') cat <<'EOM' >&4
124
125Disabling ndbm. This will generate a Whoa There message in Configure.
126Read hints/linux.sh for further information.
127EOM
128 # You can override this with Configure -Dd_dbm_open
129 d_dbm_open=undef
130 ;;
131 esac
232e078e 132fi
a0d0e21e 133
c2960299 134rm -f try.c a.out
16d20bd9 135
c2960299 136if /bin/bash -c exit; then
ef0c9946 137 echo
c2960299
AD
138 echo You appear to have a working bash. Good.
139else
ef0c9946 140 cat << 'EOM' >&4
a0d0e21e 141
ef0c9946
PP
142*********************** Warning! *********************
143It would appear you have a defective bash shell installed. This is likely to
144give you a failure of op/exec test #5 during the test phase of the build,
145Upgrading to a recent version (1.14.4 or later) should fix the problem.
146******************************************************
a0d0e21e 147EOM
c2960299
AD
148
149fi
16d20bd9 150
232e078e 151