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[perl5.git] / hints / linux.sh
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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#
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11# Last updated Thu Apr 6 12:22:03 EDT 1995
12#
13
14# perl goes into the /usr tree. See the Filesystem Standard
15# available via anonymous FTP at tsx-11.mit.edu in
16# /pub/linux/docs/linux-standards/fsstnd.
17# This used to be
18# bin='/usr/bin'
19# but it doesn't seem sensible to put the binary in /usr and all the
20# rest of the support stuff (lib, man pages) into /usr/local.
21# However, allow a command line override, e.g. Configure -Dprefix=/foo/bar
22case "$prefix" in
23'') prefix='/usr' ;;
24esac
1fc4cb55 25
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26# Perl expects BSD style signal handling.
27ccflags="-D__USE_BSD_SIGNAL $ccflags"
1fc4cb55 28
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29# The following functions are gcc built-ins, but the Configure test
30# may fail because it doesn't supply a proper prototype.
31d_memcmp=define
32d_memcpy=define
33
34# Configure may fail to find lstat() since it's a static/inline
35# function in <sys/stat.h>.
36d_lstat=define
1aef975c 37
a0d0e21e 38d_dosuid='define'
1aef975c 39
a0d0e21e 40malloctype='void *'
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41usemymalloc='n'
42
43case "$optimize" in
44'') optimize='-O2' ;;
45esac
46
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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
66if gcc try.c >/dev/null 2>&1 && ./a.out; then
67 cat <<'EOM'
68
69You appear to have ELF support. I'll try to use it for dynamic loading.
70EOM
71 # Be careful not to overwrite lddlflags, since the user might
72 # have specified some -L/path options on the Configure command line.
73 lddlflags="-shared $lddlflags"
74 ccdlflags='-rdynamic'
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75 so='so'
76 dlext='so'
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77 ld=gcc
78else
79 echo "You don't have an ELF gcc, using dld if available."
80 # We might possibly have a version of DLD around.
81 lddlflags="-r $lddlflags"
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82 so='sa'
83 dlext='o'
84 ## If you are using DLD 3.2.4 which does not support shared libs,
85 ## uncomment the next two lines:
86 #ldflags="-static"
87 #so='none'
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88fi
89rm -rf try.c a.out
a0d0e21e 90
232e078e 91cat <<'EOM'
a0d0e21e 92
1aef975c 93You should take a look at hints/linux.sh. There are a some lines you
232e078e 94may wish to change.
a0d0e21e 95EOM
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96
97# And -- reported by one user:
98# We need to get -lc away from the link lines.
99# If we leave it there we get SEGV from miniperl during the build.
100# This may have to do with bugs in the pre-release version of libc for ELF.
101# Uncomment the next two lines to remove -lc from the link line.
102# set `echo " $libswanted " | sed -e 's@ c @ @'`
103# libswanted="$*"