# hints/os390.sh # # OS/390 hints by David J. Fiander # # OS/390 OpenEdition Release 3 Mon Sep 22 1997 thanks to: # # John Goodyear # John Pfuntner # Len Johnson # Bud Huff # Peter Prymmer # Andy Dougherty # Tim Bunce # # as well as the authors of the aix.sh file # # It is too late in Configure by the time this is called to change the # compiler. But xlc or synonyms are the only thing that likely currently will # work. # # But it isn't too late to change 'ld', and the z/OS 390 ld command doesn't # understand some command line options like -W and -q that the loader needs to # know about. xlc also acts like a loader and does understand them. case "$ld" in '') ld='xlc' ;; esac # khw thinks these -W options are obsolete, at least the -Wc, where the 'c' # indicates it goes to the compiler. It appears that since these were written, # IBM added the -q series of options to the compiler, which khw thinks should # be sufficient. -Wl are for the loader, and may be required. os390_Wc="-Wc" os390_Wl="-Wl" # -DEBCDIC should come from Configure and need not be mentioned here. # Prepend your favorites with Configure -Dccflags=your_favorites # This overrides the name the compiler was called with. 'ext' is required for # "unicode literals" to be enabled def_os390_cflags='-qlanglvl=extc99'; def_os390_cflags="$def_os390_cflags -qlongname"; # khw thinks this is obsolete def_os390_cflags="$def_os390_cflags -qfloat=ieee"; # khw thinks this is obsolete # xplink = eXtended Performance linking: "Uses a z/OS linkage specifically # designed to increase performance." def_os390_cflags="$def_os390_cflags -qxplink"; def_os390_cccdlflags="-qxplink" def_os390_ldflags="-qxplink" os390_Wc="$os390_Wc,XPLINK" os390_Wl="$os390_Wl,XPLINK" # Without this, you get "IEW2689W 4C40 DEFINITION SIDE FILE IS NOT DEFINED." os390_Wl="$os390_Wl,dll" # Exports all externally defined functions and variables in the compilation # unit so that a DLL application can use them." def_os390_cflags="$def_os390_cflags -qexportall"; def_os390_cccdlflags="$def_os390_cccdlflags -qexportall" os390_Wc="$os390_Wc,EXPORTALL" # 3296= #include file not found; # 4108= The use of keyword &1 is non-portable # We care about this because it # actually means it didn't do what we expected. e.g., # INFORMATIONAL CCN4108 ./proto.h:4534 The use of keyword '__attribute__' is non-portable. def_os390_cflags="$def_os390_cflags -qhaltonmsg=3296:4108" # Combinte the -W flags with the rest def_os390_cflags="$def_os390_cflags $os390_Wc"; def_os390_cflags="$def_os390_cflags $os390_Wl"; def_os390_cccdlflags="$def_os390_cccdlflags $os390_Wc"; def_os390_cccdlflags="$def_os390_cccdlflags $os390_Wl"; def_os390_defs='-DMAXSIG=39'; # maximum signal number; not furnished by IBM def_os390_defs="$def_os390_defs -DOEMVS"; # is used in place of #ifdef __MVS__ # Turn on POSIX compatibility modes # https://www.ibm.com/support/knowledgecenter/SSLTBW_2.4.0/com.ibm.zos.v2r4.bpxbd00/ftms.htm def_os390_defs="$def_os390_defs -D_ALL_SOURCE"; # defines a BSD-like socket interface for the function prototypes and structures involved def_os390_defs="$def_os390_defs -D_OE_SOCKETS"; # ensure that the OS/390 yacc generated parser is reentrant. def_os390_defs="$def_os390_defs -DYYDYNAMIC"; # LC_MESSAGES only affects the yes/no strings in langinfo; not the things we # expect it to def_os390_defs="$def_os390_defs -DNO_LOCALE_MESSAGES" # Combine -D with cflags case "$ccflags" in '') ccflags="$def_os390_cflags $def_os390_defs" ;; *) ccflags="$ccflags $def_os390_cflags $def_os390_defs" ;; esac # Turning on optimization causes perl to not even compile from miniperl. You # can override this with Configure -Doptimize='-O2' or somesuch. case "$optimize" in '') optimize=' ' ;; esac # To link via definition side decks we need the dll option # You can override this with Configure -Ucccdlflags or somesuch. case "$cccdlflags" in '') cccdlflags=$def_os390_cccdlflags;; 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 case "$ldflags" in '') ldflags="$def_os390_ldflags $os390_Wl";; esac # Setting ldflags='-Wl,EDIT=NO' will get rid of the symbol # information at the end of the executable (=> smaller binaries). # Override this option with -Dldflags='whatever else you wanted'. case "$optimize" in *-g*) ;; *) ldflags="$ldflags -Wl,EDIT=NO" 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" # Allows char **environ to be accessed from a dynamically loaded # module such as a DLL ccflags="$ccflags -D_SHR_ENVIRON" cccdlflags="-c $def_os390_cccdlflags" lddlflags="$def_os390_cccdlflags" # 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. These are written to a CBU so that the libperl.x file # comes after all the dash-options in the flags. Configure takes the # lddlflags we give it and looks for paths to libraries to append -L options # to lddlflags. But this causes the file libperl.x to appear in the final # command line after the -L options. And z/OS doesn't like filenames after # options. This CBU defers the adding of libperl.x until after any munging # that Configure does. cat >config.arch <<' EOCBU' case "ccdlflags" in '') ccdlflags="`pwd`/libperl.x" ;; *) ccdlflags="$ccdlflags `pwd`/libperl.x" ;; esac lddlflags="$lddlflags `pwd`/libperl.x" EOCBU ;; esac # even on static builds using LIBPATH should be OK. case "$ldlibpthname" in '') ldlibpthname=LIBPATH ;; esac # The following should always be used. Perhaps newer threads will work, but # when khw tried, other things would have had to be changed to get it to work, # so left as-is. d_oldpthreads='define' # Header files to include. # You can override these with Configure -Ui_time -Ui_systime -Dd_pthread_atfork. case "$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 # (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 and various # other things. Unfortunately, cppflags occurs too late to be of # value external to the script. This may need to be revisited # # khw believes some of this is obsolete. DOLLARINNAMES allows '$' in variable # names, for whatever reason # NOLOC says to use the 1047 code page, and no locale case "$usedl" in define) echo 'cat >.$$.c; '"$cc"' -D_OE_SOCKETS -D_ALL_SOURCE -D_SHR_ENVIRON -E -Wc,"LANGLVL(DOLLARINNAMES)",NOLOC ${1+"$@"} .$$.c | fgrep -v "??="; rm .$$.c' > cppstdin ;; *) echo 'cat >.$$.c; '"$cc"' -D_OE_SOCKETS -D_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 <&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 <&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 $package. EOWARN else cat <&4 There does not appear to be one in /samples either. If you feel you can make use of an alternate yacc-like parser generator then please read the comments in the hints/os390.sh file carefully. EOWARN fi exit 1 fi fi # These exist, but there is something wrong with either them, or our reentr.[ch], # and no one has felt it important enough to investigate/fix. The # non-reentrant versions seem to work, but will have races in threads. d_gethostbyaddr_r='undef' d_gethostbyname_r='undef' d_gethostent_r='undef' # nan() used to not work as expected: nan("") or nan("0") returned zero, not a # nan. This may have been a C89 issue. # http://www-01.ibm.com/support/knowledgecenter/SSLTBW_1.12.0/com.ibm.zos.r12.bpxbd00/nan.htm%23nan?lang=en #d_nan='undef' # Configure says this exists, but it doesn't work properly. See # <54DCE073.4010100@khwilliamson.com> d_dir_dd_fd='undef' ############################################################################ # Thread support # use Configure -Dusethreads to enable # This script UU/usethreads.cbu will get 'called-back' by Configure # after it has prompted the user for whether to use threads. # setlocale() returns NULL if a thread has been created, so we can't use it # generally. (It would be possible to have it work for initialization, so that # the user could specify a locale for the whole program; but deferring doing # that work until someone wants it) Maybe IBM will support POSIX 2008 at some # point. There are hooks that make it look like they were working on it. cat > UU/usethreads.cbu <<'EOCBU' case "$usethreads" in $define|true|[yY]*) echo "Your system's setlocale() is broken under threads; marking it as unavailable" >&4 d_setlocale="undef" d_setlocale_accepts_any_locale_name="undef" d_has_C_UTF8="false" esac EOCBU