# hints/os390.sh
+#
+# OS/390 hints by David J. Fiander <davidf@mks.com>
+#
# OS/390 OpenEdition Release 3 Mon Sep 22 1997 thanks to:
-#
+#
+# John Goodyear <johngood@us.ibm.com>
# John Pfuntner <pfuntner@vnet.ibm.com>
# Len Johnson <lenjay@ibm.net>
# Bud Huff <BAHUFF@us.oracle.com>
# Peter Prymmer <pvhp@forte.com>
-# Andy Dougherty <doughera@lafcol.lafayette.edu>
+# Andy Dougherty <doughera@lafayette.edu>
# Tim Bunce <Tim.Bunce@ig.co.uk>
#
# as well as the authors of the aix.sh file
#
-cc='c89'
-ccflags='-DOEMVS -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE'
-optimize='none'
-alignbytes=8
-usemymalloc='y'
-so='a'
-dlext='none'
-d_shmatprototype='define'
-usenm='false'
-i_time='define'
-i_systime='define'
-d_select='undef'
+# To get ANSI C, we need to use c89, and ld doesn't exist
+# You can override this with Configure -Dcc=gcc -Dld=ld.
+case "$cc" in
+'') cc='c99' ;;
+esac
+case "$ld" in
+'') ld='c99' ;;
+esac
+
+# -DMAXSIG=39 maximum signal number
+# -DOEMVS is used in place of #ifdef __MVS__ in certain places.
+# -D_OE_SOCKETS alters system headers.
+# -D_XOPEN_SOURCE_EXTENDEDA alters system headers.
+# c89 hides most of the useful header stuff, _ALL_SOURCE turns it on again.
+# YYDYNAMIC ensures that the OS/390 yacc generated parser is reentrant.
+# -DEBCDIC should come from Configure and need not be mentioned here.
+# Prepend your favorites with Configure -Dccflags=your_favorites
+case "$ccflags" in
+'') ccflags='-qlanglvl=extended:extc89:extc99 -qlongname -qxplink -qdll -qfloat=ieee -qhaltonmsg=3296:4108 -DMAXSIG=39 -DOEMVS -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -DYYDYNAMIC -D_POSIX_SOURCE=1' ;;
+*) ccflags='$ccflags -qlanglvl=extended:extc89:extc99 -qlongname -qxplink -qdll -qfloat=ieee -qhaltonmsg=3296:4108 -DMAXSIG=39 -DOEMVS -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -DYYDYNAMIC -D_POSIX_SOURCE=1' ;;
+esac
+
+# Turning on optimization breaks perl.
+# You can override this with Configure -Doptimize='-O' or somesuch.
+case "$optimize" in
+'') optimize='none' ;;
+esac
+
+# To link via definition side decks we need the dll option
+# You can override this with Configure -Ucccdlflags or somesuch.
+case "$cccdlflags" in
+'') cccdlflags='-qxplink -qdll' ;;
+esac
+
+case "$so" in
+'') so='a' ;;
+esac
+
+case "$alignbytes" in
+'') alignbytes=8 ;;
+esac
+
+case "$usemymalloc" in
+'') usemymalloc='n' ;;
+esac
+
+# On OS/390, libc.a doesn't really hold anything at all,
+# so running nm on it is pretty useless.
+# You can override this with Configure -Dusenm.
+case "$usenm" in
+'') usenm='false' ;;
+esac
+
+# Setting ldflags='-Wl,EDIT=NO' will get rid of the symbol
+# information at the end of the executable (=> smaller binaries).
+# Override this option with -Dldflags='whatever else you wanted'.
+case "$ldflags" in
+'') ldflags='-qxplink -qdll' ;;
+esac
+
+# In order to build with dynamic be sure to specify:
+# Configure -Dusedl
+# Do not forget to add $archlibexp/CORE to your LIBPATH.
+# You might want to override some of this with things like:
+# Configure -Dusedl -Ddlext=so -Ddlsrc=dl_dllload.xs.
+case "$usedl" in
+'')
+ usedl='n'
+ case "$dlext" in
+ '') dlext='none' ;;
+ esac
+ ;;
+define)
+ case "$useshrplib" in
+ '') useshrplib='true' ;;
+ esac
+ case "$dlsrc" in
+ '') dlsrc='dl_dllload.xs' ;;
+ esac
+ # For performance use 'so' at or beyond v2.8, 'dll' for 2.7 and prior versions
+ case "`uname -v`x`uname -r`" in
+ 02x0[89].*|02x1[0-9].*|[0-9][3-9]x*)
+ so='so'
+ case "$dlext" in
+ '') dlext='so' ;;
+ esac
+ ;;
+ *)
+ so='dll'
+ case "$dlext" in
+ '') dlext='dll' ;;
+ esac
+ ;;
+ esac
+ libperl="libperl.$so"
+ ccflags="$ccflags -D_SHR_ENVIRON -DPERL_EXTERNAL_GLOB -qexportall -qdll -qxplink"
+ cccdlflags='-c -qexportall -qxplink -qdll'
+ # The following will need to be modified for the installed libperl.x.
+ # The modification to Config.pm is done by the installperl script after the build and test.
+ ccdlflags="-qxplink -qdll `pwd`/libperl.x"
+ lddlflags="-qxplink -qdll `pwd`/libperl.x"
+ ;;
+esac
+# even on static builds using LIBPATH should be OK.
+case "$ldlibpthname" in
+'') ldlibpthname=LIBPATH ;;
+esac
+
+# The following should always be used
+d_oldpthreads='define'
+
+# Header files to include.
+# You can override these with Configure -Ui_time -Ui_systime -Dd_pthread_atfork.
+case "$i_time" in
+'') i_time='define' ;;
+esac
+case "$i_systime" in
+'') i_systime='define' ;;
+esac
+case "$d_pthread_atfork" in
+'') d_pthread_atfork='undef' ;;
+esac
+case "$d_pthread_atfork" in
+'') d_pthread_atfork='undef' ;;
+esac
# (from aix.sh)
# uname -m output is too specific and not appropriate here
-#
+# osname should come from Configure
+# You can override this with Configure -Darchname='s390' but please don't.
case "$archname" in
'') archname="$osname" ;;
esac
+# We have our own cppstdin script. This is not a variable since
+# Configure sees the presence of the script file.
+# We put system header -D definitions in so that Configure
+# can find the shmat() prototype in <sys/shm.h> and various
+# other things. Unfortunately, cppflags occurs too late to be of
+# value external to the script. This may need to be revisited
+# under a compiler other than c89.
+case "$usedl" in
+define)
+echo 'cat >.$$.c; '"$cc"' -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -D_SHR_ENVIRON -E -Wc,"LANGLVL(DOLLARINNAMES)",NOLOC ${1+"$@"} .$$.c | fgrep -v "??="; rm .$$.c' > cppstdin
+ ;;
+*)
+echo 'cat >.$$.c; '"$cc"' -D_OE_SOCKETS -D_XOPEN_SOURCE_EXTENDED -D_ALL_SOURCE -E -Wc,"LANGLVL(DOLLARINNAMES)",NOLOC ${1+"$@"} .$$.c | fgrep -v "??="; rm .$$.c' > cppstdin
+ ;;
+esac
+
+#
+# Note that Makefile.SH employs a bare yacc command to generate
+# perly.[hc], hence you may wish to:
+#
+# alias yacc='myyacc'
+#
+# Then if you would like to use myyacc and skip past the
+# following warnings try invoking Configure like so:
+#
+# sh Configure -Dbyacc=yacc
+#
+# This trick ought to work even if your yacc is byacc.
+#
+if test "X$byacc" = "Xbyacc" ; then
+ if test -e /etc/yyparse.c ; then
+ : we should be OK - perhaps do a test -r?
+ else
+ cat <<EOWARN >&4
+
+Warning. You do not have a copy of yyparse.c, the default
+yacc parser template file, in place in /etc.
+EOWARN
+ if test -e /samples/yyparse.c ; then
+ cat <<EOWARN >&4
+
+There does appear to be a template file in /samples though.
+Please run:
+
+ cp /samples/yyparse.c /etc
+
+before attempting to Configure the build of $package.
+
+EOWARN
+ else
+ cat <<EOWARN >&4
+
+There does not appear to be one in /samples either.
+If you feel you can make use of an alternate yacc-like
+parser generator then please read the comments in the
+hints/os390.sh file carefully.
+
+EOWARN
+ fi
+ exit 1
+ fi
+fi
+
+# Most of the time gcvt() seems to work fine but
+# sometimes values like 0.1, 0.2, come out as "10", "20",
+# a trivial Perl demonstration snippet is 'print 0.1'.
+# The -W 0,float(ieee) seems to be the switch breaking gcvt().
+# sprintf() seems to get things right(er).
+gconvert_preference=sprintf
+
+# Configure gets these wrong for some reason.
+d_gethostbyaddr_r='undef'
+d_gethostbyname_r='undef'
+d_gethostent_r='undef'
+
+# The z/OS C compiler compiler supports the attribute keyword, but in a
+# limited manner.
+#
+# Ideally, Configure's tests should test the attributes as they are expected
+# to be used in perl, and, ideally, those tests would fail on z/OS.
+# Until then, just tell Configure to ignore the attributes. Currently,
+# Configure thinks attributes are supported because it does not recognize
+# warning messages like this:
+#
+# INFORMATIONAL CCN4108 ./proto.h:4534 The use of keyword '__attribute__' is non-portable.
+
+d_attribute_deprecated='undef'
+d_attribute_format='undef'
+d_attribute_malloc='undef'
+d_attribute_nonnull='undef'
+d_attribute_noreturn='undef'
+d_attribute_pure='undef'
+d_attribute_unused='undef'
+d_attribute_warn_unused_result='undef'
+
+# nan() is in libm but doesn't work as expected: nan("") or nan("0")
+# returns zero, not a nan:
+# http://www-01.ibm.com/support/knowledgecenter/SSLTBW_1.12.0/com.ibm.zos.r12.bpxbd00/nan.htm%23nan?lang=en
+# contrast with e.g.
+# http://www.cplusplus.com/reference/cmath/nan-function/
+# (C++ but C99 math agrees)
+# XXX: Configure scan for proper behavior
+d_nan='undef'
+
+# Configures says this exists, but it doesn't work properly. See
+# <54DCE073.4010100@khwilliamson.com>
+d_dir_dd_fd='undef'
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