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# hints/linux.sh
# Original version by rsanders
# Additional support by Kenneth Albanowski <kjahds@kjahds.com>
#
# ELF support by H.J. Lu <hjl@nynexst.com>
# Additional info from Nigel Head <nhead@ESOC.bitnet>
# and Kenneth Albanowski <kjahds@kjahds.com>
#
# Consolidated by Andy Dougherty <doughera@lafcol.lafayette.edu>
#
# Updated Thu Feb 8 11:56:10 EST 1996
# Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafcol.lafayette.edu>
# Updated Fri Jun 21 11:07:54 EDT 1996
# NDBM support for ELF renabled by <kjahds@kjahds.com>
# No version of Linux supports setuid scripts.
d_suidsafe='undef'
# perl goes into the /usr tree. See the Filesystem Standard
# available via anonymous FTP at tsx-11.mit.edu in
# /pub/linux/docs/linux-standards/fsstnd.
# Allow a command line override, e.g. Configure -Dprefix=/foo/bar
case "$prefix" in
'') prefix='/usr' ;;
esac
# gcc-2.6.3 defines _G_HAVE_BOOL to 1, but doesn't actually supply bool.
ccflags="-Dbool=char -DHAS_BOOL $ccflags"
# libc6, aka glibc2, seems to need STRUCT_TM_HASZONE defined.
# Thanks to Bart Schuller <schuller@Lunatech.com>
# See Message-ID: <19971009002636.50729@tanglefoot>
# This is currently commented out for maintenance releases
# but should probably be uncommented for 5.005 or after
# more widespread testing.
#POSIX_cflags='ccflags="$ccflags -DSTRUCT_TM_HASZONE"'
# BSD compatability library no longer needed
set `echo X "$libswanted "| sed -e 's/ bsd / /'`
shift
libswanted="$*"
# Configure may fail to find lstat() since it's a static/inline
# function in <sys/stat.h>.
d_lstat=define
# Explanation?
case "$usemymalloc" in
'') usemymalloc='n' ;;
esac
case "$optimize" in
'') optimize='-O2' ;;
esac
# Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
# for this test.
cat >try.c <<'EOM'
/* Test for whether ELF binaries are produced */
#include <fcntl.h>
#include <stdlib.h>
main() {
char buffer[4];
int i=open("a.out",O_RDONLY);
if(i==-1)
exit(1); /* fail */
if(read(i,&buffer[0],4)<4)
exit(1); /* fail */
if(buffer[0] != 127 || buffer[1] != 'E' ||
buffer[2] != 'L' || buffer[3] != 'F')
exit(1); /* fail */
exit(0); /* succeed (yes, it's ELF) */
}
EOM
if ${cc:-gcc} try.c >/dev/null 2>&1 && ./a.out; then
cat <<'EOM' >&4
You appear to have ELF support. I'll try to use it for dynamic loading.
If dynamic loading doesn't work, read hints/linux.sh for further information.
EOM
#For RedHat Linux 3.0.3, you may need to fetch
# ftp://ftp.redhat.com/pub/redhat-3.0.3/i386/updates/RPMS/ld.so-1.7.14-3.i386.rpm
#
else
cat <<'EOM' >&4
You don't have an ELF gcc. I will use dld if possible. If you are
using a version of DLD earlier than 3.2.6, or don't have it at all, you
should probably upgrade. If you are forced to use 3.2.4, you should
uncomment a couple of lines in hints/linux.sh and restart Configure so
that shared libraries will be disallowed.
EOM
lddlflags="-r $lddlflags"
# These empty values are so that Configure doesn't put in the
# Linux ELF values.
ccdlflags=' '
cccdlflags=' '
ccflags="-DOVR_DBL_DIG=14 $ccflags"
so='sa'
dlext='o'
nm_so_opt=' '
## If you are using DLD 3.2.4 which does not support shared libs,
## uncomment the next two lines:
#ldflags="-static"
#so='none'
# In addition, on some systems there is a problem with perl and NDBM
# which causes AnyDBM and NDBM_File to lock up. This is evidenced
# in the tests as AnyDBM just freezing. Apparently, this only
# happens on a.out systems, so we disable NDBM for all a.out linux
# systems. If someone can suggest a more robust test
# that would be appreciated.
#
# More info:
# Date: Wed, 7 Feb 1996 03:21:04 +0900
# From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
#
# I tried compiling with DBM support and sure enough things locked up
# just as advertised. Checking into it, I found that the lockup was
# during the call to dbm_open. Not *in* dbm_open -- but between the call
# to and the jump into.
#
# To make a long story short, making sure that the *.a and *.sa pairs of
# /usr/lib/lib{m,db,gdbm}.{a,sa}
# were perfectly in sync took care of it.
#
# This will generate a harmless Whoa There! message
case "$d_dbm_open" in
'') cat <<'EOM' >&4
Disabling ndbm. This will generate a Whoa There message in Configure.
Read hints/linux.sh for further information.
EOM
# You can override this with Configure -Dd_dbm_open
d_dbm_open=undef
;;
esac
fi
rm -f try.c a.out
if /bin/bash -c exit; then
echo ''
echo 'You appear to have a working bash. Good.'
else
cat << 'EOM' >&4
*********************** Warning! *********************
It would appear you have a defective bash shell installed. This is likely to
give you a failure of op/exec test #5 during the test phase of the build,
Upgrading to a recent version (1.14.4 or later) should fix the problem.
******************************************************
EOM
fi
# On SPARClinux,
# The following csh consistently coredumped in the test directory
# "/home/mikedlr/perl5.003_94/t", though not most other directories.
#Name : csh Distribution: Red Hat Linux (Rembrandt)
#Version : 5.2.6 Vendor: Red Hat Software
#Release : 3 Build Date: Fri May 24 19:42:14 1996
#Install date: Thu Jul 11 16:20:14 1996 Build Host: itchy.redhat.com
#Group : Shells Source RPM: csh-5.2.6-3.src.rpm
#Size : 184417
#Description : BSD c-shell
# For this reason I suggest using the much bug-fixed tcsh for globbing
# where available.
if [ ! "`csh -c 'echo $version' 2>/dev/null`" ]
then
echo 'Real csh found (might break); looking for tcsh ...'
# Use ../UU/loc to find tcsh. (We run in the hints/ directory.)
if xxx=`../UU/loc tcsh blurfl $pth`; $test -f "$xxx"; then
echo "Found tcsh. I'll use it for globbing."
# We can't change Configure's setting of $csh, due to the way
# Configure handles $d_portable and commands found in $loclist.
# We can set the value for CSH in config.h by setting full_csh.
full_csh=$xxx
else
echo "Couldn't find tcsh. BEWARE: GLOBBING MIGHT BE BROKEN."
fi
else
echo 'Your csh is really tcsh. Good.'
fi
# Shimpei Yamashita <shimpei@socrates.patnet.caltech.edu>
# Message-Id: <33EF1634.B36B6500@pobox.com>
#
# MkLinux (osname=linux,archname=ppc-linux), which differs slightly from other
# linuces, needs special flags passed in order for dynamic loading to work.
# instead of the recommended:
# ccdlflags='-rdynamic'
#
# it should be:
# ccdlflags='-Wl,-E'
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