+# $Id: dgux.sh,v 1.8 1996-11-29 18:16:43-05 roderick Exp $
+
+# This is a hints file for DGUX, which is Data General's Unix. It was
+# originally developed with version 5.4.3.10 of the OS, and then was
+# later updated running under version 4.11.2 (running on m88k hardware).
+# The gross features should work with versions going back to 2.nil but
+# some tweaking will probably be necessary.
#
-# hints file for Data General DG/UX
-# these hints tweaked for perl5 on an AViiON mc88100, running DG/UX 5.4R2.01
+# DGUX is a SVR4 derivative. It ships with gcc as the standard
+# compiler. Since version 3.0 it has shipped with Perl 4.036
+# installed in /usr/bin, which is kind of neat. Be careful when you
+# install that you don't overwrite the system version, though (by
+# answering yes to the question about installing perl as /usr/bin/perl),
+# as it would suck to try to get support if the vendor learned that you
+# were physically replacing the system binaries.
#
+# -Roderick Schertler <roderick@argon.org>
-gidtype='gid_t'
-groupstype='gid_t'
-libswanted="dgc $libswanted"
-uidtype='uid_t'
-d_index='define'
-ccflags='-D_POSIX_SOURCE -D_DGUX_SOURCE'
-
-# this hasn't been tried with dynamic loading at all
-usedl='false'
-
+# Here are the things from some old DGUX hints files which are different
+# from what's in here now. I don't know the exact reasons that most of
+# these settings were in the hints files, presumably they can be chalked
+# up to old Configure inadequacies and changes in the OS headers and the
+# like. These settings might make a good place to start looking if you
+# have problems.
+#
+# This was specified the the 4.036 hints file. That hints file didn't
+# say what version of the OS it was developed using.
+#
+# cppstdin='/lib/cpp'
+#
+# The 4.036 and 5.001 hints files both contained these. The 5.001 hints
+# file said it was developed with version 2.01 of DGUX.
+#
+# gidtype='gid_t'
+# groupstype='gid_t'
+# uidtype='uid_t'
+# d_index='define'
+# cc='gcc'
+#
+# These were peculiar to the 5.001 hints file.
+#
+# ccflags='-D_POSIX_SOURCE -D_DGUX_SOURCE'
#
-# an ugly hack, since the Configure test for "gcc -P -" hangs.
-# can't just use 'cppstdin', since our DG has a broken cppstdin :-(
+# # an ugly hack, since the Configure test for "gcc -P -" hangs.
+# # can't just use 'cppstdin', since our DG has a broken cppstdin :-(
+# cppstdin=`cd ..; pwd`/cppstdin
+# cpprun=`cd ..; pwd`/cppstdin
#
-cppstdin=`cd ..; pwd`/cppstdin
-cpprun=`cd ..; pwd`/cppstdin
+# One last note: The 5.001 hints file said "you don't want to use
+# /usr/ucb/cc" in the place at which it set cc to gcc. That in
+# particular baffles me, as I used to have 2.01 loaded and my memory
+# is telling me that even then /usr/ucb was a symlink to /usr/bin.
+
+# The standard system compiler is gcc, but invoking it as cc changes its
+# behavior. I have to pick one name or the other so I can get the
+# dynamic loading switches right (they vary depending on this). I'm
+# picking gcc because there's no way to get at the optimization options
+# and so on when you call it cc.
+case $cc in
+ '')
+ cc=gcc
+ case $optimize in
+ '') optimize=-O2;;
+ esac
+ ;;
+esac
+
+usevfork=true
+
+# DG has this thing set up with symlinks which point to different places
+# depending on environment variables (see elink(5)) and the compiler and
+# related tools use them to access different development environments
+# (COFF, ELF, m88k BCS and so on), see sde(5). The upshot, however, is
+# that when a normal program tries to access one of these elinks it sees
+# no such file (like stat()ting a mis-directed symlink). Setting
+# $plibpth to explicitly include the place to which the elinks point
+# allows Configure to find libraries which vary based on the development
+# environment.
#
-# you don't want to use /usr/ucb/cc
+# Starting with version 4.10 (the first time the OS supported Intel
+# hardware) all libraries are accessed with this mechanism.
#
-cc='gcc'
+# The default $TARGET_BINARY_INTERFACE changed with version 4.10. The
+# system now comes with a link named /usr/sde/default which points to
+# the proper entry, but older versions lacked this and used m88kdgux
+# directly.
+
+: && sde_path=${SDE_PATH:-/usr}/sde # hide from Configure
+while : # dummy loop
+do
+ if [ -n "$TARGET_BINARY_INTERFACE" ]
+ then set X "$TARGET_BINARY_INTERFACE"
+ else set X default dg m88k_dg ix86_dg m88kdgux m88kdguxelf
+ fi
+ shift
+ default_sde=$1
+ for sde
+ do
+ [ -d "$sde_path/$sde" ] && break 2
+ done
+ cat <<END >&2
+
+NOTE: I can't figure out what SDE is used by default on this machine (I
+didn't find a likely directory under $sde_path). This is bad news. If
+this is a R4.10 or newer system I'm not going to be able to find any of
+your libraries, if this system is R3.10 or older I won't be able to find
+the math library. You should re-run Configure with the environment
+variable TARGET_BINARY_INTERFACE set to the proper value for this
+machine, see sde(5) and the notes in hints/dgux.sh.
+
+END
+ sde=$default_sde
+ break
+done
+
+plibpth="$plibpth $sde_path/$sde/usr/lib"
+unset sde_path default_sde sde
+
+# Many functions (eg, gethostent(), killpg(), getpriority(), setruid()
+# dbm_*(), and plenty more) are defined in -ldgc. Usually you don't
+# need to know this (it seems that libdgc.so is searched automatically
+# by ld), but Configure needs to check it otherwise it will report all
+# those functions as missing.
+libswanted="dgc $libswanted"
+
+# Dynamic loading works using the dlopen() functions. Note that dlfcn.h
+# used to be broken, it declared _dl*() rather than dl*(). This was the
+# case up to 3.10, it has been fixed in 4.11. I'm not sure if it was
+# fixed in 4.10. If you have the older header just ignore the warnings
+# (since pointers and integers have the same format on m88k).
+usedl=true
+# For cc rather than gcc the flags would be `-K PIC' for compiling and
+# -G for loading. I haven't tested this.
+cccdlflags=-fpic
+lddlflags=-shared
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