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, 45 insertions, 39 deletions

diff --git a/config_h.SH b/config_h.SH
index 8ba725d916..35bfb1b1b7 100644
--- a/config_h.SH
+++ b/config_h.SH
@@ -145,26 +145,6 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #$d_dlerror 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.
- */
-#$d_suidsafe SETUID_SCRIPTS_ARE_SECURE_NOW	/**/
-#$d_dosuid DOSUID		/**/
-
 /* HAS_DUP2:
  *	This symbol, if defined, indicates that the dup2 routine is
  *	available to duplicate file descriptors.
@@ -942,17 +922,6 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #$i_values 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>.
- */
-#$i_stdarg I_STDARG		/**/
-#$i_varargs I_VARARGS	/**/
-
 /* I_VFORK:
  *	This symbol, if defined, indicates to the C program that it should
  *	include vfork.h.
@@ -986,12 +955,6 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #define SH_PATH "$sh"  /**/
 
-/* CROSSCOMPILE:
- *	This symbol, if defined, signifies that we our
- *	build process is a cross-compilation.
- */
-#$crosscompile CROSSCOMPILE		/**/
-
 /* INTSIZE:
  *	This symbol contains the value of sizeof(int) so that the C
  *	preprocessor can make decisions based on it.
@@ -1075,7 +1038,7 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  *	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)
+#if defined(USE_CROSS_COMPILE) || defined(MULTIARCH)
 #  define MEM_ALIGNBYTES 8
 #else
 #define MEM_ALIGNBYTES $alignbytes
@@ -1152,7 +1115,7 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  *	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
@@ -3370,6 +3333,49 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
 #define PERL_XS_APIVERSION "$xs_apiversion"
 #define PERL_PM_APIVERSION "$pm_apiversion"
 
+/* 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.
+ */
+#$d_suidsafe SETUID_SCRIPTS_ARE_SECURE_NOW	/**/
+#$d_dosuid 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>.
+ */
+#$i_stdarg I_STDARG		/**/
+#$i_varargs 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
+#$usecrosscompile	USE_CROSS_COMPILE	/**/
+#define	PERL_TARGETARCH	"$targetarch"	/**/
+#endif
+
 /* HAS_DBMINIT_PROTO:
  *	This symbol, if defined, indicates that the system provides
  *	a prototype for the dbminit() function.  Otherwise, it is up