Add core of the infrastructure support for cross-compilation.

- USE_CROSS_COMPILATION activates it, CROSS_DESTDIR specifies root of
  the target filesystem
- derive _CROSS_DESTDIR from CROSS_DESTDIR or MAKEOBJDIR
- buildlink3.mk prefixes the files to symlink with _CROSS_DESTDIR
- compiler/gcc.mk knows about the target prefix (e.g. i386--netbsdelf)
- PKG_DBDIR is prefixed with _CROSS_DESTDIR
- package-install and bin-install are not called with su
- install and strip are redirected to the tool version
- links for the target specific ar, as, ld, nm, objdump, ranlib and
  strip are added
- compiler wrapper detect if linking is requested or not
- special command sinks for CPP and CC/CXX add the cross-compile magic:
  - modify include dirs to get the target /usr/include
  - modify linker dirs and runpath to use target /usr/lib at link time,
    but keep correct rpath entries

Supported-by: Google SoC 2007
Basic tests by he@ on Sparc. Review from jlam@.

1 files changed, 5 insertions, 1 deletions

diff --git a/mk/install/bin-install.mk b/mk/install/bin-install.mk
index f617359efbd..83eb54a58a5 100644
--- a/mk/install/bin-install.mk
+++ b/mk/install/bin-install.mk
@@ -1,4 +1,4 @@
-# $NetBSD: bin-install.mk,v 1.9 2007/03/09 03:28:58 rillig Exp $
+# $NetBSD: bin-install.mk,v 1.10 2007/08/02 18:19:32 joerg Exp $
 #
 
 # This file provides the following targets:
@@ -36,7 +36,11 @@ bin-install: \
 	do-bin-install \
 	do-bin-install-from-source
 
+.  if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+do-bin-install: su-do-bin-install
+.  else
 do-bin-install: su-target
+.  endif
 	@${PHASE_MSG} "Binary install for "${PKGNAME_REQD:U${PKGNAME}:Q}
 
 su-do-bin-install: \