From 8489188508bafece71d2019cb0dac6720f8529f0 Mon Sep 17 00:00:00 2001
From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Wed, 21 Nov 2001 15:03:53 +0000
Subject: Dynaloading for POSIX-BC from Thomas Dorner.

p4raw-id: //depot/perl@13171
---
 hints/posix-bc.sh | 143 ++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 112 insertions(+), 31 deletions(-)

(limited to 'hints/posix-bc.sh')

diff --git a/hints/posix-bc.sh b/hints/posix-bc.sh
index a7d3d2c4ab..683bbccaff 100644
--- a/hints/posix-bc.sh
+++ b/hints/posix-bc.sh
@@ -1,26 +1,120 @@
-#! /usr/bin/bash -norc
+:
 # hints/posix-bc.sh
 #
 # BS2000 (Posix Subsystem) hints by Thomas Dorner <Thomas.Dorner@start.de>
 #
-#  thanks to the authors of the os390.sh
+# Thanks to the authors of the os390.sh for the very first draft.
 #
+# You can modify almost any parameter set here using Configure with
+# the appropriate -D option.
 
-# To get ANSI C, we need to use c89, and ld does not exist
-# You can override this with Configure -Dcc=gcc -Dld=ld.
+# remove this line if dynamic libraries are working for you:
+bs2000_ignoredl='y'
+
+# To get ANSI C, we need to use c89
+# You can override this with Configure -Dcc=gcc
+# (if you ever get a gcc ported to BS2000 ;-).
 case "$cc" in
 '') cc='c89' ;;
 esac
-case "$ld" in
-'') ld='c89' ;;
-esac
 
 # C-Flags:
 # -DPOSIX_BC
 # -DUSE_PURE_BISON
 # -D_XOPEN_SOURCE_EXTENDED alters system headers.
 # Prepend your favorites with Configure -Dccflags=your_favorites
-ccflags="$ccflags -Kenum_long,llm_case_lower,llm_keep,no_integer_overflow -DPOSIX_BC -DUSE_PURE_BISON -D_XOPEN_SOURCE_EXTENDED"
+ccflags="$ccflags -Kc_names_unlimited,enum_long,llm_case_lower,llm_keep,no_integer_overflow -DPOSIX_BC -DUSE_PURE_BISON -D_XOPEN_SOURCE_EXTENDED"
+
+# Now, what kind of BS2000 system are we running on?
+echo
+if [ -n "`bs2cmd SHOW-SYSTEM-INFO | egrep 'HSI-ATT.*TYPE.*SR'`" ]; then
+    echo "You are running a BS2000 machine with Sunrise CPUs."
+    echo "Let's hope you have the matching RISC compiler as well."
+    ccflags="-K risc_4000 $ccflags"
+    bs2000_ldflags='-K risc_4000'
+else
+    echo "Seems like a standard 390 BS2000 machine to me."
+    bs2000_ldflags=''
+fi
+echo
+if [ -z "$bs2000_ignoredl" -a -e /usr/lib/libdl.a ]; then
+    echo "Wow, your BS2000 is State Of The Art and seems to support dynamic libraries."
+    echo "I just can't resist giving them a try."
+    bs2000_lddlflags='-Bsymbolic -Bdynamic'
+    # dynamic linkage of system libraries gave us runtime linker
+    # errors, so we use static linkage while generating our DLLs :-(
+#    bs2000_lddlflags='-Bstatic'
+    bs2000_so='none'
+    bs2000_usedl='define'
+    bs2000_dlext='so'
+    case $bs2000_ldflags in
+	*risc_4000*)
+	    bs2000_ld="perl_genso"
+	    echo "
+Now you must buy everything they sell you, musn't you?
+Didn't somebody tell you that RISC machines and dynamic library support gives
+you helluva lot of configuration problems at the moment?
+Sigh.  Now you'll expect me to fix it for you, eh?
+OK, OK, I'll give you a wrapper.
+Just copy $bs2000_ld anywhere into your path before you try to install
+additional modules!"
+
+cat > $bs2000_ld <<EOF
+#! /bin/sh
+#
+# Perl's wrapper for genso by Thomas.Dorner@start.de
+
+GENSO=/usr/bin/genso
+options=""
+params=""
+while [[ \$# -gt 0 ]]; do
+    case \$1 in
+	-K)
+	    shift
+	    ;;
+	-K*)
+	    ;;
+	*.a)
+	    lib=\${1##*/lib}
+	    options="\$options -L\${1%/lib*.a} -l\${lib%.a}"
+	    ;;
+	*.o)
+	    params="\$params \$1"
+	    ;;
+	*)
+	    options="\$options \$1"
+    esac
+    shift
+done
+echo \$GENSO \$options \$params
+exec \$GENSO \$options \$params
+EOF
+
+	    chmod +x $bs2000_ld
+	    if [[ -w /usr/local/bin && ! -f /usr/local/bin/$bs2000_ld ]]; then
+		cp -p $bs2000_ld /usr/local/bin/$bs2000_ld
+		echo "(Actually I just did that as well, have a look into /usr/local/bin.)"
+	    fi
+	    ;;
+	*)
+	    bs2000_ld='genso'
+    esac
+else
+    if [ -e /usr/lib/libdl.a ]; then
+	echo "Your BS2000 supports dynamic libraries, but you (or we ;-) decided to leave them alone."
+    else
+	echo "Your BS2000 does'n support dynamic libraries so we're just staying static."
+    fi
+    bs2000_ld='c89'
+    bs2000_lddlflags=''
+    bs2000_so='none'
+    bs2000_usedl='n'
+    bs2000_dlext='none'
+fi
+
+case "$ld" in
+'') ld=$bs2000_ld ;;
+esac
 
 # ccdlflags have yet to be determined.
 #case "$ccdlflags" in
@@ -32,24 +126,13 @@ ccflags="$ccflags -Kenum_long,llm_case_lower,llm_keep,no_integer_overflow -DPOSI
 #'') cccdlflags='' ;;
 #esac
 
-# ldflags have yet to be determined.
-#case "$ldflags" in
-#'') ldflags='' ;;
-#esac
-
-# lddlflags have yet to be determined.
-#case "$lddlflags" in
-#'') lddlflags='' ;;
-#esac
+case "$ldflags" in
+'') ldflags=$bs2000_ldflags ;;
+esac
 
-# Flags on a RISC-Host (SUNRISE):
-if [ -n "`bs2cmd SHOW-SYSTEM-INFO | egrep 'HSI-ATT.*TYPE.*SR'`" ]; then
-    echo
-    echo "Congratulations, you are running a machine with Sunrise CPUs."
-    echo "Let's hope you have the matching RISC compiler as well."
-    ccflags="-K risc_4000 $ccflags"
-    ldflags='-K risc_4000'
-fi
+case "$lddlflags" in
+'') lddlflags=$bs2000_lddlflags ;;
+esac
 
 # Turning on optimization breaks perl (CORE-DUMP):
 # You can override this with Configure -Doptimize='-O' or somesuch.
@@ -57,9 +140,9 @@ case "$optimize" in
 '') optimize='none' ;;
 esac
 
-# we don''t use dynamic memorys (yet):
+# BS2000 doesn't use dynamic memory on its own (yet):
 case "$so" in
-'') so='none' ;;
+'') so=$bs2000_so ;;
 esac
 
 case "$usemymalloc" in
@@ -73,14 +156,12 @@ case "$usenm" in
 '') usenm='false' ;;
 esac
 
-# Dynamic loading doesn't work on OS/390 quite yet.
-# You can override this with
 #  Configure -Dusedl -Ddlext=.so -Ddlsrc=dl_dllload.xs.
 case "$usedl" in
-'') usedl='n' ;;
+'') usedl=$bs2000_usedl ;;
 esac
 case "$dlext" in
-'') dlext='none' ;;
+'') dlext=$bs2000_dlext ;;
 esac
 #case "$dlsrc" in
 #'') dlsrc='none' ;;
-- 
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