[inseparable changes from patch from perl5.003_07 to perl5.003_08]

 CORE LANGUAGE CHANGES

Subject: Bitwise op sign rationalization
From: Chip Salzenberg <chip@atlantic.net>
Files: op.c opcode.pl pod/perlop.pod pod/perltoc.pod pp.c pp.h pp_hot.c proto.h sv.c t/op/bop.t

    Make bitwise ops result in unsigned values, unless C<use
    integer> is in effect.  Includes initial support for UVs.

Subject: Defined scoping for C<my> in control structures
From: Chip Salzenberg <chip@atlantic.net>
Files: op.c perly.c perly.c.diff perly.h perly.y proto.h toke.c

    Finally defines semantics of "my" in control expressions,
    like the condition of "if" and "while".  In all cases, scope
    of a "my" var extends to the end of the entire control
    structure.  Also adds new construct "for my", which
    automatically declares the control variable "my" and limits
    its scope to the loop.

Subject: Fix ++/-- after int conversion (e.g. 'printf "%d"')
From: Chip Salzenberg <chip@atlantic.net>
Files: pp.c pp_hot.c sv.c

    This patch makes Perl correctly ignore SvIVX() if either
    NOK or POK is true, since SvIVX() may be a truncated or
    overflowed version of the real value.

Subject: Make code match Camel II re: functions that use $_
From: Paul Marquess <pmarquess@bfsec.bt.co.uk>
Files: opcode.pl

Subject: Provide scalar context on left side of "->"
From: Chip Salzenberg <chip@atlantic.net>
Files: perly.c perly.y

Subject: Quote bearword package/handle FOO in "funcname FOO => 'bar'"
From: Chip Salzenberg <chip@atlantic.net>
Files: toke.c

 OTHER CORE CHANGES

Subject: Warn on overflow of octal and hex integers
From: Chip Salzenberg <chip@atlantic.net>
Files: proto.h toke.c util.c

Subject: If -w active, warn for commas and hashes ('#') in qw()
From: Chip Salzenberg <chip@atlantic.net>
Files: toke.c

Subject: Fixes for pack('w')
From: Ulrich Pfeifer <pfeifer@charly.informatik.uni-dortmund.de>
Files: pp.c t/op/pack.t

Subject: More complete output from sv_dump()
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: sv.c

Subject: Major '..' and debugger patches
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Files: lib/perl5db.pl op.c pp_ctl.c scope.c scope.h

Subject: Fix for formline()
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: global.sym mg.c perl.h pod/perldiag.pod pp_ctl.c proto.h sv.c t/op/write.t

Subject: Fix stack botch in untie and binmode
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: pp_sys.c

Subject: Complete EMBED, including symbols from interp.sym
From: Chip Salzenberg <chip@atlantic.net>
Files: MANIFEST embed.pl ext/DynaLoader/dlutils.c ext/SDBM_File/sdbm/sdbm.h global.sym handy.h malloc.c perl.h pp_sys.c proto.h regexec.c toke.c util.c x2p/Makefile.SH x2p/a2p.h x2p/handy.h x2p/util.h

    New define EMBEDMYMALLOC makes embedding total by
    avoiding "Mymalloc" etc.

Subject: Support old embedding for people who want it
From: Chip Salzenberg <chip@atlantic.net>
Files: MANIFEST Makefile.SH old_embed.pl old_global.sym

 PORTABILITY

Subject: Miscellaneous VMS fixes
From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>
Files: lib/ExtUtils/Liblist.pm lib/ExtUtils/MM_VMS.pm lib/Math/Complex.pm lib/Time/Local.pm lib/timelocal.pl perl.h perl_exp.SH proto.h t/TEST t/io/read.t t/lib/findbin.t t/lib/getopt.t util.c utils/h2xs.PL vms/Makefile vms/config.vms vms/descrip.mms vms/ext/Stdio/Stdio.pm vms/ext/Stdio/Stdio.xs vms/perlvms.pod vms/test.com vms/vms.c

Subject: DJGPP patches (MS-DOS)
From: "Douglas E. Wegscheid" <wegscd@whirlpool.com>
Files: doio.c dosish.h ext/SDBM_File/sdbm/sdbm.c handy.h lib/AutoSplit.pm lib/Cwd.pm lib/File/Find.pm malloc.c perl.c perl.h pp_sys.c proto.h sv.c util.c

Subject: Patch to make Perl work under AmigaOS
From: "Norbert Pueschel" <pueschel@imsdd.meb.uni-bonn.de>
Files: MANIFEST hints/amigaos.sh installman lib/File/Basename.pm lib/File/Find.pm pod/pod2man.PL pp_sys.c util.c

1 files changed, 89 insertions, 8 deletions

diff --git a/README.os2 b/README.os2
index f5bf87db06..bbadbf64b0 100644
--- a/README.os2
+++ b/README.os2
@@ -144,9 +144,12 @@ Cf. L<Prerequisites>.
 
 =item B<EMX>
 
-B<EMX> runtime is required. Note that it is possible to make F<perl_.exe>
-to run under DOS without any external support by binding F<emx.exe> to
-it, see L<emxbind>.
+B<EMX> runtime is required (may be substituted by B<RSX>). Note that
+it is possible to make F<perl_.exe> to run under DOS without any
+external support by binding F<emx.exe> to it, see L<emxbind>. Note
+that under DOS for best results one should use B<RSX> runtime, which
+has much more functions working (like C<fork>, C<popen> and so on). In
+fact B<RSX> is required if there is no C<VCPI> present.
 
 Only the latest runtime is supported, currently C<0.9c>.
 
@@ -161,7 +164,13 @@ The runtime component should have the name F<emxrt.zip>.
 
 To run Perl on C<DPMS> platforms one needs B<RSX> runtime. This is
 needed under DOS-inside-OS/2, Win0.31, Win0.95 and WinNT (see 
-L<"Other OSes">).
+L<"Other OSes">). I do not know whether B<RSX> would work with C<VCPI>
+only, as B<EMX> would.
+
+Having B<RSX> and the latest F<sh.exe> one gets a fully functional
+B<*nix>-ish environment under DOS, say, C<fork>, C<``> and
+pipe-C<open> work. In fact, MakeMaker works (for static build), so one
+can have Perl development environment under DOS. 
 
 One can get B<RSX> from, say
 
@@ -170,6 +179,10 @@ One can get B<RSX> from, say
 
 Contact the author on C<rainer@mathematik.uni-bielefeld.de>.
 
+The latest F<sh.exe> with DOS hooks is available at
+
+  ftp://ftp.math.ohio-state.edu/pub/users/ilya/os2/sh_dos.exe
+
 =item B<HPFS>
 
 Perl does not care about file systems, but to install the whole perl
@@ -254,9 +267,22 @@ meta-characters.
 
 =head2 I cannot run extenal programs
 
+=over 4
+
+=item
+
 Did you run your programs with C<-w> switch? See 
 L<Starting OS/2 programs under Perl>.
 
+=item
+
+Do you try to run I<internal> shell commands, like C<`copy a b`>
+(internal for F<cmd.exe>), or C<`glob a*b`> (internal for ksh)? You
+need to specify your shell explicitely, like C<`cmd /c copy a b`>,
+since Perl cannot deduce which commands are internal to your shell.
+
+=back
+
 =head2 I cannot embed perl into my program, or use F<perl.dll> from my
 program. 
 
@@ -273,6 +299,16 @@ I had reports it does not work. Somebody would need to fix it.
 
 =back
 
+=head2 C<``> and pipe-C<open> do not work under DOS.
+
+This may a variant of just L<"I cannot run extenal programs">, or a
+deeper problem. Basically: you I<need> B<RSX> (see L<"Prerequisites">)
+for these commands to work, and you need a port of F<sh.exe> which
+understands command arguments. One of such ports is listed in
+L<"Prerequisites"> under B<RSX>.
+
+I do not know whether C<DPMI> is required.
+
 =head1 INSTALLATION
 
 =head2 Automatic binary installation
@@ -674,7 +710,7 @@ Now run
 
   make test
 
-Some tests (4..6) should fail. Some perl invocations should end in a
+Some tests (5..7) should fail. Some perl invocations should end in a
 segfault (system error C<SYS3175>). To get finer error reports, 
 
   cd t
@@ -692,7 +728,8 @@ The report you get may look like
 
 Note that using `make test' target two more tests may fail: C<op/exec:1>
 because of (mis)feature of C<pdksh>, and C<lib/posix:15>, which checks
-that the buffers are not flushed on C<_exit>.
+that the buffers are not flushed on C<_exit> (this is a bug in the test
+which assumes that tty output is buffered).
 
 The reasons for failed tests are:
 
@@ -961,8 +998,22 @@ eventually).
 
 =item
 
-Since <lockf> is present in B<EMX>, but is not functional, the same is
-true for perl.
+Since <flock> is present in B<EMX>, but is not functional, the same is
+true for perl. Here is the list of things which may be "broken" on
+EMX (from EMX docs):
+
+  - The functions recvmsg(), sendmsg(), and socketpair() are not
+    implemented.
+  - sock_init() is not required and not implemented.
+  - flock() is not yet implemented (dummy function).
+  - kill:
+      Special treatment of PID=0, PID=1 and PID=-1 is not implemented.
+  - waitpid:
+      WUNTRACED
+	      Not implemented.
+      waitpid() is not implemented for negative values of PID.
+
+Note that C<kill -9> does not work with the current version of EMX.
 
 =item
 
@@ -974,6 +1025,36 @@ the current C<pdksh>.
 
 =back
 
+=head2 Modifications
+
+Perl modifies some standard C library calls in the following ways:
+
+=over 9
+
+=item C<popen>
+
+C<my_popen> always uses F<sh.exe>, cf. L<"PERL_SH_DIR">.
+
+=item C<tmpnam>
+
+is created using C<TMP> or C<TEMP> environment variable, via
+C<tempnam>.
+
+=item C<tmpfile>
+
+If the current directory is not writable, it is created using modified
+C<tmpnam>, so there may be a race condition.
+
+=item C<ctermid>
+
+a dummy implementation.
+
+=item C<stat>
+
+C<os2_stat> special-cases F</dev/tty> and F</dev/con>.
+
+=back
+
 =head1 Perl flavors
 
 Because of ideosyncrasies of OS/2 one cannot have all the eggs in the