The first steps towards cross-compilation.

Abstract execution of compiled test executables with $run,
and abstract transfer of files with $to and $from.

Under cross-compilation the $run, $to, and $from will point
to appropriate wrapper scripts, by default ssh and scp,
but also rsh, rcp, and cp are supported.  If not
cross-compiling, they will be set to '', ':', and ':',
respectively.

With these patches I was able to get Configure for
iPAQ ARM Linux on an Intel Linux about 95% right
(only a few tests failed to execute or they produced
incorrect results), and I was able to compile
a functional miniperl.

The symbol crosscompile renamed to be usecrosscompile,
the corresponding C symbol from CROSSCOMPILE to
USE_CROSS_COMPILE.

p4raw-id: //depot/perl@10592

1 files changed, 46 insertions, 40 deletions

diff --git a/uconfig.h b/uconfig.h
index 08799f2540..67578fae84 100644
--- a/uconfig.h
+++ b/uconfig.h
@@ -121,26 +121,6 @@
  */
 /*#define HAS_DLERROR	/ **/
 
-/* SETUID_SCRIPTS_ARE_SECURE_NOW:
- *	This symbol, if defined, indicates that the bug that prevents
- *	setuid scripts from being secure is not present in this kernel.
- */
-/* DOSUID:
- *	This symbol, if defined, indicates that the C program should
- *	check the script that it is executing for setuid/setgid bits, and
- *	attempt to emulate setuid/setgid on systems that have disabled
- *	setuid #! scripts because the kernel can't do it securely.
- *	It is up to the package designer to make sure that this emulation
- *	is done securely.  Among other things, it should do an fstat on
- *	the script it just opened to make sure it really is a setuid/setgid
- *	script, it should make sure the arguments passed correspond exactly
- *	to the argument on the #! line, and it should not trust any
- *	subprocesses to which it must pass the filename rather than the
- *	file descriptor of the script to be executed.
- */
-/*#define SETUID_SCRIPTS_ARE_SECURE_NOW	/ **/
-/*#define DOSUID		/ **/
-
 /* HAS_DUP2:
  *	This symbol, if defined, indicates that the dup2 routine is
  *	available to duplicate file descriptors.
@@ -918,17 +898,6 @@
  */
 /*#define I_VALUES		/ **/
 
-/* I_STDARG:
- *	This symbol, if defined, indicates that <stdarg.h> exists and should
- *	be included.
- */
-/* I_VARARGS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <varargs.h>.
- */
-#define I_STDARG		/**/
-/*#define I_VARARGS	/ **/
-
 /* I_VFORK:
  *	This symbol, if defined, indicates to the C program that it should
  *	include vfork.h.
@@ -962,12 +931,6 @@
  */
 #define SH_PATH ""  /**/
 
-/* CROSSCOMPILE:
- *	This symbol, if defined, signifies that we our
- *	build process is a cross-compilation.
- */
-/*#define CROSSCOMPILE		/ **/
-
 /* INTSIZE:
  *	This symbol contains the value of sizeof(int) so that the C
  *	preprocessor can make decisions based on it.
@@ -1051,8 +1014,8 @@
  *	double, or a long double when applicable. Usual values are 2,
  *	4 and 8. The default is eight, for safety.
  */
-#if defined(CROSSCOMPILE) || defined(MULTIARCH)
-#  define MEM_ALIGNBYTES 8
+#if defined(USE_CROSS_COMPILE) || defined(MULTIARCH)
+#define MEM_ALIGNBYTES 8
 #else
 #define MEM_ALIGNBYTES 4
 #endif
@@ -1128,7 +1091,7 @@
  *	so the default case (for NeXT) is big endian to catch them. 
  *	This might matter for NeXT 3.0.
  */
-#if defined(CROSSCOMPILE) || defined(MULTIARCH)
+#if defined(USE_CROSS_COMPILE) || defined(MULTIARCH)
 #  ifdef __LITTLE_ENDIAN__
 #    if LONGSIZE == 4
 #      define BYTEORDER 0x1234
@@ -3346,6 +3309,49 @@
 #define PERL_XS_APIVERSION "5.005"
 #define PERL_PM_APIVERSION "5.005"
 
+/* SETUID_SCRIPTS_ARE_SECURE_NOW:
+ *	This symbol, if defined, indicates that the bug that prevents
+ *	setuid scripts from being secure is not present in this kernel.
+ */
+/* DOSUID:
+ *	This symbol, if defined, indicates that the C program should
+ *	check the script that it is executing for setuid/setgid bits, and
+ *	attempt to emulate setuid/setgid on systems that have disabled
+ *	setuid #! scripts because the kernel can't do it securely.
+ *	It is up to the package designer to make sure that this emulation
+ *	is done securely.  Among other things, it should do an fstat on
+ *	the script it just opened to make sure it really is a setuid/setgid
+ *	script, it should make sure the arguments passed correspond exactly
+ *	to the argument on the #! line, and it should not trust any
+ *	subprocesses to which it must pass the filename rather than the
+ *	file descriptor of the script to be executed.
+ */
+/*#define SETUID_SCRIPTS_ARE_SECURE_NOW	/ **/
+/*#define DOSUID		/ **/
+
+/* I_STDARG:
+ *	This symbol, if defined, indicates that <stdarg.h> exists and should
+ *	be included.
+ */
+/* I_VARARGS:
+ *	This symbol, if defined, indicates to the C program that it should
+ *	include <varargs.h>.
+ */
+#define I_STDARG		/**/
+/*#define I_VARARGS	/ **/
+
+/* USE_CROSS_COMPILE:
+ *	This symbol, if defined, indicates that Perl is being cross-compiled.
+ */
+/* PERL_TARGETARCH:
+ *	This symbol, if defined, indicates the target architecture
+ *	Perl has been cross-compiled to.  Undefined if not a cross-compile.
+ */
+#ifndef USE_CROSS_COMPILE
+/*#define	USE_CROSS_COMPILE	/ **/
+#define	PERL_TARGETARCH	""	/**/
+#endif
+
 /* HAS_DBMINIT_PROTO:
  *	This symbol, if defined, indicates that the system provides
  *	a prototype for the dbminit() function.  Otherwise, it is up