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[perl5.git] / README.ce

If you read this file _as_is_, just ignore the funny characters you
see.  It is written in the POD format (see pod/perlpod.pod) which is
specifically designed to be readable as is.

=head1 NAME

perlce - Perl for WinCE

=head1 Building Perl for WinCE

=head2 DESCRIPTION

This file gives the instructions for building Perl5.8 and above for
WinCE.  Please read and understand the terms under which this
software is distributed.

=head2 General explanations on cross-compiling WinCE

=over

=item *

F<miniperl> is built. This is a single executable (without DLL), intended
to run on Win32, and it will facilitate remaining build process; all binaries
built after it are foreign and should not run locally.

F<miniperl> is built using F<./win32/Makefile>; this is part of normal
build process invoked as dependency from wince/Makefile.ce

=item *

After F<miniperl> is built, F<configpm> is invoked to create right F<Config.pm>
in right place and its corresponding Cross.pm.

Unlike Win32 build, miniperl will not have F<Config.pm> of host within reach;
it rather will use F<Config.pm> from within cross-compilation directories.

File F<Cross.pm> is dead simple: for given cross-architecture places in @INC
a path where perl modules are, and right F<Config.pm> in that place.

That said, C<miniperl -Ilib -MConfig -we 1> should report an error, because
it can not find F<Config.pm>. If it does not give an error -- wrong F<Config.pm>
is substituted, and resulting binaries will be a mess.

C<miniperl -MCross -MConfig -we 1> should run okay, and it will provide right
F<Config.pm> for further compilations.

=item *

During extensions build phase, a script F<./win32/buldext.pl> is invoked,
which in turn steps in F<./ext> subdirectories and performs a build of
each extension in turn.

All invokes of F<Makefile.PL> are provided with C<-MCross> so to enable cross-
compile.

=back

=head2 BUILD

This section describes the steps to be performed to build PerlCE.
You may find additional information about building perl for WinCE
at L<http://perlce.sourceforge.net> and some pre-built binaries.

=head3 Tools & SDK

For compiling, you need following:

=over 4

=item * Microsoft Embedded Visual Tools

=item * Microsoft Visual C++

=item * Rainer Keuchel's celib-sources

=item * Rainer Keuchel's console-sources

=back

Needed source files can be downloaded at
L<http://perlce.sourceforge.net>

=head3 Make

Normally you only need to edit F<./win32/ce-helpers/compile.bat>
to reflect your system and run it.

File F<./win32/ce-helpers/compile.bat> is actually a wrapper to call
C<nmake -f makefile.ce> with appropriate parameters and it accepts extra
parameters and forwards them to C<nmake> command as additional
arguments. You should pass target this way.

To prepare distribution you need to do following:

=over 4

=item * go to F<./win32> subdirectory

=item * edit file F<./win32/ce-helpers/compile.bat>

=item * run 
  compile.bat

=item * run 
  compile.bat dist

=back

F<Makefile.ce> has C<CROSS_NAME> macro, and it is used further to refer to
your cross-compilation scheme. You could assign a name to it, but this
is not necessary, because by default it is assigned after your machine
configuration name, such as "wince-sh3-hpc-wce211", and this is enough
to distinguish different builds at the same time. This option could be
handy for several different builds on same platform to perform, say,
threaded build. In a following example we assume that all required
environment variables are set properly for C cross-compiler (a special
*.bat file could fit perfectly to this purpose) and your F<compile.bat>
has proper "MACHINE" parameter set, to, say, C<wince-mips-pocket-wce300>.

  compile.bat
  compile.bat dist
  compile.bat CROSS_NAME=mips-wce300-thr "USE_ITHREADS=define" "USE_IMP_SYS=define" "USE_MULTI=define"
  compile.bat CROSS_NAME=mips-wce300-thr "USE_ITHREADS=define" "USE_IMP_SYS=define" "USE_MULTI=define" dist

If all goes okay and no errors during a build, you'll get two independent
distributions: C<wince-mips-pocket-wce300> and C<mips-wce300-thr>.

Target C<dist> prepares distribution file set. Target C<zipdist> performs
same as C<dist> but additionally compresses distribution files into zip
archive.

NOTE: during a build there could be created a number (or one) of F<Config.pm>
for cross-compilation ("foreign" F<Config.pm>) and those are hidden inside
F<../xlib/$(CROSS_NAME)> with other auxiliary files, but, and this is important to
note, there should be B<no> F<Config.pm> for host miniperl.
If you'll get an error that perl could not find Config.pm somewhere in building
process this means something went wrong. Most probably you forgot to
specify a cross-compilation when invoking miniperl.exe to Makefile.PL
When building an extension for cross-compilation your command line should
look like

  ..\miniperl.exe -I..\lib -MCross=mips-wce300-thr Makefile.PL

or just

  ..\miniperl.exe -I..\lib -MCross Makefile.PL

to refer a cross-compilation that was created last time.

All questions related to building for WinCE devices could be asked in
F<perlce-user@lists.sourceforge.net> mailing list.

=head1 Using Perl on WinCE

=head2 DESCRIPTION

PerlCE is currently linked with a simple console window, so it also
works on non-hpc devices.

The simple stdio implementation creates the files F<stdin.txt>,
F<stdout.txt> and F<stderr.txt>, so you might examine them if your
console has only a limited number of cols.

When exitcode is non-zero, a message box appears, otherwise the
console closes, so you might have to catch an exit with
status 0 in your program to see any output.

stdout/stderr now go into the files F</perl-stdout.txt> and
F</perl-stderr.txt.>

PerlIDE is handy to deal with perlce.

=head2 LIMITATIONS

No fork(), pipe(), popen() etc.

=head2 ENVIRONMENT

All environment vars must be stored in HKLM\Environment as
strings. They are read at process startup.

=over

=item PERL5LIB

Usual perl lib path (semi-list).

=item PATH

Semi-list for executables.

=item TMP

- Tempdir.

=item UNIXROOTPATH

- Root for accessing some special files, i.e. F</dev/null>, F</etc/services>.

=item ROWS/COLS

- Rows/cols for console.

=item HOME

- Home directory.

=item CONSOLEFONTSIZE

- Size for console font.

=back

You can set these with cereg.exe, a (remote) registry editor
or via the PerlIDE.

=head2 REGISTRY

To start perl by clicking on a perl source file, you have
to make the according entries in HKCR (see F<ce-helpers/wince-reg.bat>).
cereg.exe (which must be executed on a desktop pc with
ActiveSync) is reported not to work on some devices.
You have to create the registry entries by hand using a 
registry editor.

=head2 XS

The following Win32-Methods are built-in:

	newXS("Win32::GetCwd", w32_GetCwd, file);
	newXS("Win32::SetCwd", w32_SetCwd, file);
	newXS("Win32::GetTickCount", w32_GetTickCount, file);
	newXS("Win32::GetOSVersion", w32_GetOSVersion, file);
	newXS("Win32::IsWinNT", w32_IsWinNT, file);
	newXS("Win32::IsWin95", w32_IsWin95, file);
	newXS("Win32::IsWinCE", w32_IsWinCE, file);
	newXS("Win32::CopyFile", w32_CopyFile, file);
	newXS("Win32::Sleep", w32_Sleep, file);
	newXS("Win32::MessageBox", w32_MessageBox, file);
	newXS("Win32::GetPowerStatus", w32_GetPowerStatus, file);
	newXS("Win32::GetOemInfo", w32_GetOemInfo, file);
	newXS("Win32::ShellEx", w32_ShellEx, file);

=head2 BUGS

Opening files for read-write is currently not supported if
they use stdio (normal perl file handles).

If you find bugs or if it does not work at all on your
device, send mail to the address below. Please report
the details of your device (processor, ceversion, 
devicetype (hpc/palm/pocket)) and the date of the downloaded
files. 

=head2 INSTALLATION

Currently installation instructions are at L<http://perlce.sourceforge.net/>.

After installation & testing processes will stabilize, information will
be more precise.

=head1 ACKNOWLEDGEMENTS

The port for Win32 was used as a reference.

=head1 History of WinCE port

=over

=item 5.6.0

Initial port of perl to WinCE. It was performed in separate directory
named F<wince>. This port was based on contents of F<./win32> directory.
F<miniperl> was not built, user must have HOST perl and properly edit
F<makefile.ce> to reflect this.

=item 5.8.0

wince port was kept in the same F<./wince> directory, and F<wince/Makefile.ce>
was used to invoke native compiler to create HOST miniperl, which then
facilitates cross-compiling process.
Extension building support was added.

=item 5.9.4

Two directories F<./win32> and F<./wince> were merged, so perlce build
process comes in F<./win32> directory.

=back

=head1 AUTHORS

=over

=item Rainer Keuchel <coyxc@rainer-keuchel.de>

provided initial port of Perl, which appears to be most essential work, as
it was a breakthrough on having Perl ported at all.
Many thanks and obligations to Rainer!

=item Vadim Konovalov

made further support of WinCE port.

=back