Updated Sharp Zaurus cross-compilation from Redvers Davies.

p4raw-id: //depot/perl@21057

1 files changed, 48 insertions, 17 deletions

diff --git a/Cross/README b/Cross/README
index e113380ff1..4c5d25a2ff 100644
--- a/Cross/README
+++ b/Cross/README
@@ -1,26 +1,25 @@
-Summary
--------
+Building for arm-linux
+----------------------
 
-This is a patch set which adds cross-compilation to the perl
-buildsystem.  It was built as a part of the Open Zaurus
-(http://www.openzaurus.com/) distribution.  Most / All of the
-arm compiler optimisations are "borrowed" from this excellent
-project.
+The files in this directory add another cross-compilation
+target to the Perl buildsystem.  It was built as a part of
+the Open Zaurus (http://www.openzaurus.com/) distribution.
+Most / All of the arm compiler optimisations are "borrowed"
+from this excellent project.
 
 The main target is arm-linux but I have also managed to
-successfully cross-compile perl for solaris x86 using the same
+successfully cross-compile Perl for Solaris x86 using the same
 buildsystem.
 
 We are currently dependent on an existing working local copy of
-perl ** of the same version and revision ** which is available
-as /usr/bin/perl.  This could be migrated to using native
-miniperl with some additional effort.
+Perl ** of the same version and revision ** which is available
+as /usr/bin/perl. 
 
-Obviously you need a working and tested cross-compiler for your
-build and target combination.  The binary directory must be in
+You need a working and tested cross-compiler for your build
+and target combination.  The binary directory must be in
 your path.
 
-1)	You should be reading me (README) in perl-5.x.x/Cross
+1)	You should be reading me (README) in perl-5.8.1/Cross
 
 2)	Make sure you are in the Cross directory.
 
@@ -29,17 +28,49 @@ your path.
 4)	make patch	## This will patch the existing source-tree.
 5)	make perl	## Will make perl
 
+Your built Perl environment is in install_me_here/ in your build
+directory.  From here you can package and deploy as you wish.
+
 The Obvious Ommissions
 ----------------------
 
-This does NOT perform any installation as site installation method will
-be dependant on the target arch and OS. 
+This does NOT perform any installation as site installation method
+will be dependent on the target architecture and OS. 
 
-make test will NOT work as the binaries and libraries will not execute.
+make test will NOT work as the binaries and libraries will not execute
+on your BUILD machine. 
 
 Due to space limitations on the Zaurus (it's a PDA) we do not provide
 documentation in the core - Therefore man pages are not even generated.
 
+Other Targets (For Developers)
+------------------------------
+
+It is possible to extend the cross-compilation to other targets.
+We have sucessfully compiled for the target solaris2.8/x86
+on linux/x86 build system.
+
+To attempt a cross-compile for another target using the methods
+in this directory:
+
+1)	Copy the Perl source code onto your TARGET machine.
+2)	Execute sh Configure as normal and configure as required,
+	do not "make".
+3)	Copy the config.sh file that is generated to your BUILD
+	machine and place it in the Cross directory with the
+	filename config.sh-ARCH-OS.  For example,
+	config.sh-i386-pc-solaris2.8.  For the appropriate ARCH
+	and OS please refer to your cross-compiler documentation.
+4)	Edit Cross/config to reflect your new target and continue
+	with build as above.
+
+Should you wish to produce optimised binaries for different
+architectures you can add the appropriate compiler flags to
+the Makefile in a new ifeq ($(ARCH),...) ... endif block.
+
+Please refer to your cross-compiler documentation for details.
+
+
 	Note that the Cross/ directory is also used by a different
 	cross-compilation setup described in the INSTALL file, and
 	executed by Configure.  There should be no conflicts since