add klibc infrastructure for crosscompiling

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+PR = "${INC_PR}.0"
+
+require klibc.inc
+require klibc-checksums_${PV}.inc
+
+export KLCC_INST = "${STAGING_DIR_TARGET}/lib/klibc"
+
+SRC_URI += "file://klcc_prefix.patch \
+            file://use-env-for-perl.patch"
+
+DEPENDS = "klibc"
+
+FILESPATH =. "${FILE_DIRNAME}/klibc-${PV}:"
+
+# ${TARGET_PREFIX}klcc is just a
+# perl wrapper around gcc-cross
+# so give it the same arch and path
+PACKAGE_ARCH = "${TUNE_PKGARCH}"
+
+inherit cross
+
+do_configure () {
+        :
+}
+
+do_compile() {
+        oe_runmake klcc
+}
+
+do_install() {
+        install -d ${D}${base_bindir}
+        install -m 0755 klcc/klcc ${D}${base_bindir}/${TARGET_PREFIX}klcc
+}

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+Patch was imported from the OpenEmbedded git server
+(git://git.openembedded.org/openembedded)
+as of commit id a29bf15b9c9c0d15f96c254b2ed830e104ae3436
+Signed-off-by: Andrea Adami <[email protected]>
+
+Index: klibc-1.5.19/klcc/Kbuild
+===================================================================
+--- --- klibc-1.5.19.orig/klcc/Kbuild	2010-07-07 14:07:48.000000000 +0200
++++ --- klibc-1.5.19./klcc/Kbuild	2010-08-18 23:39:23.000000000 +0200
+@@ -22,10 +22,10 @@
+ 	$(Q)echo 'EMAIN=$(KLIBCEMAIN)' >> $@
+ 	$(Q)echo 'BITSIZE=$(KLIBCBITSIZE)' >> $@
+ 	$(Q)echo 'VERSION=$(shell cat $(srctree)/usr/klibc/version)' >> $@
+-	$(Q)echo 'prefix=$(INSTALLDIR)' >> $@
+-	$(Q)echo 'bindir=$(INSTALLDIR)/$(KCROSS)bin' >> $@
+-	$(Q)echo 'libdir=$(INSTALLDIR)/$(KCROSS)lib' >> $@
+-	$(Q)echo 'includedir=$(INSTALLDIR)/$(KCROSS)include' >> $@
++	$(Q)echo 'prefix=$(KLCC_INST)' >> $@
++	$(Q)echo 'bindir=$(KLCC_INST)/$(KCROSS)bin' >> $@
++	$(Q)echo 'libdir=$(KLCC_INST)/$(KCROSS)lib' >> $@
++	$(Q)echo 'includedir=$(KLCC_INST)/$(KCROSS)include' >> $@
+ 
+ 
+ # Generate klcc

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+Patch was imported from the OpenEmbedded git server
+(git://git.openembedded.org/openembedded)
+as of commit id b6764cf32ec93547531130dca364fb95e1c495f4
+Signed-off-by: Thomas Kunze <[email protected]>
+
+diff -Nur klibc-1.5/defconfig klibc-1.5p/defconfig
+--- klibc-1.5/defconfig	2007-03-04 02:52:10.000000000 +0100
++++ klibc-1.5p/defconfig	2008-02-08 19:24:22.337127756 +0100
+@@ -5,4 +5,4 @@
+ CONFIG_REGPARM=y
+ # ARM options
+ # CONFIG_KLIBC_THUMB is not set
+-# CONFIG_AEABI is not set
++CONFIG_AEABI=y

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+Do not strip binaries too early. Strip is done before packaging.
+Signed-off-by: Andrea Adami <[email protected]>
+
+--- a/scripts/Kbuild.klibc	2011-06-14 17:11:17.000000000 +0200
++++ b/scripts/Kbuild.klibc	2011-07-15 01:18:58.000000000 +0200
+@@ -332,8 +332,7 @@
+                        $(KLIBCLIBC)				\
+ 		       $(KLIBCLIBGCC)				\
+ 		       --end-group ;				\
+-                      cp -f $@ [email protected] ;				\
+-                      $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@
++                       cp -f $@ [email protected]
+ 
+ 
+ $(static-y): $(kprog-objs) $(lib-target) $(KLIBCCRT0) $(KLIBCLIBC) FORCE
+@@ -348,8 +347,7 @@
+                        -R $(KLIBCLIBCSHARED)			\
+ 	               $(KLIBCLIBGCC)				\
+ 		       --end-group ;				\
+-                      cp -f $@ [email protected] ;				\
+-                      $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@
++                       cp -f $@ [email protected]
+ 
+ 
+ $(shared-y): $(kprog-objs) $(lib-target) $(KLIBCCRTSHARED) \
+
+--- a/usr/klibc/Kbuild	2011-07-15 01:46:32.000000000 +0200
++++ b/usr/klibc/Kbuild	2011-07-15 01:47:17.000000000 +0200
+@@ -147,7 +147,6 @@
+ 
+ quiet_cmd_sohash = GEN     $@
+       cmd_sohash = cat $< > $@;                                           \
+-                     $(KLIBCSTRIP) $(KLIBCSTRIPFLAGS) $@;                 \
+ 		     chmod a+x $@;					  \
+                      rm -f $(obj)/klibc-???????????????????????????.so;   \
+                      ln -f $@ $(obj)/klibc-$(SOLIBHASH).so

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@@ -0,0 +1,31 @@
+Subject: Add relevant socket.h definitions
+
+* Discussed upstream:
+* http://www.zytor.com/pipermail/klibc/2010-February/002487.html
+* http://www.zytor.com/pipermail/klibc/2010-February/002488.html
+*
+* Was: Add guards for pre 2.6.33 compatibility.
+*
+* Changes for 1.5.24
+* Only include linux/sockios.h for SIOCGIFCONF and SIOCSIFFLAGS
+* requested by kexec-tools when building statically against klibc.
+
+Signed-off-by: Andrea Adami <[email protected]>
+
+Index: klibc-1.5.24/usr/include/sys/socket.h
+===================================================================
+--- a/usr/include/sys/socket.h	2011-07-27 15:50:53.000000000 +0200
++++ b/usr/include/sys/socket.h	2010-05-31 00:44:16.000000000 +0200
+@@ -10,6 +10,12 @@
+ #include <klibc/compiler.h>
+ #include <klibc/sysconfig.h>
+ #include <linux/socket.h>
++
++#include <linux/version.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)
++#include <linux/sockios.h>		/* the SIOCxxx I/O controls     */
++#endif
++
+ #include <linux/uio.h>
+ #include <asm/socket.h>
+ #if _KLIBC_HAS_ARCHSOCKET_H

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+Patch was imported from the OpenEmbedded git server
+(git://git.openembedded.org/openembedded)
+as of commit id 676cbb54d42c89a4832871064cfcb7ee2ad372ee
+
+klcc-cross: Add patch to use /usr/bin/env perl
+Certain configurations (such as autobuilders) may build in very
+deep paths (that are longer than the #! mechanism allows) which
+makes it unsafe to use the direct path for perl.  In our case we know
+that /usr/bin/env perl will always return ours (if it has been built).
+
+Signed-off-by: Tom Rini <[email protected]>
+
+Index: klibc-1.5.20/klcc/makeklcc.pl
+===================================================================
+--- a/klcc/makeklcc.pl
++++ b/klcc/makeklcc.pl
+@@ -26,7 +26,7 @@ sub pathsearch($) {
+     return undef;
+ }
+ 
+-print "#!${perlpath}\n";
++print "#!/usr/bin/env perl\n";
+ 
+ open(KLIBCCONF, "< $klibcconf\0")
+     or die "$0: cannot open $klibcconf: $!\n";

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+SRC_URI[md5sum] = "4df9b0d3d7f9f366c4b5c171cac3c6c3"
+SRC_URI[sha256sum] = "71fac12937ead3f104aad8ac40567ecdcac1ea27474cce939f6226499b1895a2"

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+PR = "${INC_PR}.0"
+
+KLIBC_UTILS_VARIANT = "static"
+KLIBC_UTILS_PKGNAME = "klibc-static-utils"
+
+FILESPATH =. "${FILE_DIRNAME}/klibc-${PV}:"
+
+do_install() {
+        :
+}
+
+PACKAGES_${PN} = "${PN}"
+FILES_${PN} = ""
+
+require klibc-utils.inc
+require klibc.inc
+require klibc-checksums_${PV}.inc

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+PR = "${INC_PR}.0"
+
+export INST = "${D}"
+
+do_install() {
+
+        oe_runmake install
+
+        # the crosscompiler is packaged by klcc-cross
+        # remove klcc
+        # remove also from FILES_libklibc-dev
+        rm ${D}${base_bindir}/klcc
+
+        # remove Linux headers .install and ..install.cmd files
+        find ${D}${base_libdir}/klibc/include -name '.install' -delete
+        find ${D}${base_libdir}/klibc/include -name '..install.cmd' -delete
+
+        # only for sh.shared and kinit.shared
+        install -d ${D}${base_bindir}
+        install -m 755 usr/dash/sh.shared ${D}${base_bindir}/sh.shared
+        install -m 755 usr/kinit/kinit.shared ${D}${base_bindir}/kinit.shared
+
+        install -d ${D}${base_libdir}
+        install -m 755 usr/klibc/klibc-*.so ${D}${base_libdir}
+        (cd  ${D}${base_libdir}; ln -s klibc-*.so klibc.so)
+
+}
+
+PACKAGES = "libklibc libklibc-dev"
+FILES_libklibc = "${base_libdir}/klibc-*.so"
+FILES_libklibc-dev = "${base_libdir}/klibc.so \
+                      ${base_libdir}/klibc/lib/* \
+                      ${base_libdir}/klibc/include/* \
+# see above
+# do not package it in -dev
+#                      ${base_bindir}/klcc \
+                      "
+require klibc-utils.inc
+require klibc.inc
+require klibc-checksums_${PV}.inc

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+# klcc-cross depends on klibc
+DEPENDS =+ "klcc-cross"
+
+export CC=${TARGET_PREFIX}klcc
+
+# reset inherited OE flags to avoid e.g. ggdb3 and keep size small
+export CFLAGS=""
+export CPPFLAGS=""
+export LDFLAGS=""

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+# klcc-cross depends on klibc
+DEPENDS =+ "klcc-cross"
+
+export CC = "${TARGET_PREFIX}klcc"
+
+# klcc uses own optimizations by default. See klcc(1) man file.
+export CFLAGS=""
+export CPPFLAGS=""
+export LDFLAGS=""