multiple fixes

- avoid choking in morestack on i586,
 - fixup dependencies
 - rename rust-cross to internal-rust-cross (in the hope the people are
   less likely to try to inherit it when they shouldn't)
 - enable-local-rust for -target and -cross builds

classes/internal-rust-cross.bbclass

@@ -13,6 +13,5 @@ PN = "rust-cross-${TARGET_ARCH}"
 # INHIBIT_PACKAGE_STRIP = "1"
 # ARCH_FLAGS_FOR_TARGET += "-isystem${STAGING_DIR_NATIVE}${target_includedir}"
 
-
 # TODO: use rust-native instead of a snapshot
 EXTRA_OECONF += ""

classes/internal-rust-native.bbclass

@@ -0,0 +1,5 @@
+inherit native
+PN = "rust-native"
+
+USE_LOCAL_NATIVE_RUST ??= "0"
+USE_LOCAL_RUST = "${base_conditional('USE_LOCAL_NATIVE_RUST', '0', '0', '1')}"

recipes/rust-hello-world/rust-hello-world_git.bb

@@ -6,7 +6,7 @@ SUMMARY = "Hello World by Cargo for Rust"
 HOMEPAGE = "https://github.com/jmesmon/rust-hello-world"
 LICENSE = "MIT | Apache-2.0"
 
-DEPENDS = "rust cargo"
+DEPENDS = "cargo-native"
 
 inherit rust
 S = "${WORKDIR}/git"

recipes/rust/files/0001-platform.mk-avoid-choking-on-i586.patch

@@ -0,0 +1,27 @@
+From fead6879b81ca4a15116a572ae286a6cb0b071c0 Mon Sep 17 00:00:00 2001
+From: Cody P Schafer <dev@codyps.com>
+Date: Sat, 15 Nov 2014 20:12:48 -0500
+Subject: [PATCH] platform.mk: avoid choking on i586
+
+---
+ mk/platform.mk | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/mk/platform.mk b/mk/platform.mk
+index 6da01ef..ee83f66 100644
+--- a/mk/platform.mk
++++ b/mk/platform.mk
+@@ -14,7 +14,9 @@
+ # would create a variable HOST_i686-darwin-macos with the value
+ # i386.
+ define DEF_HOST_VAR
+-  HOST_$(1) = $(subst i686,i386,$(word 1,$(subst -, ,$(1))))
++  HOST_$(1) = $(subst i686,i386,\
++    $(subst i586,i386,\
++    $(word 1,$(subst -, ,$(1)))))
+ endef
+ $(foreach t,$(CFG_TARGET),$(eval $(call DEF_HOST_VAR,$(t))))
+ $(foreach t,$(CFG_TARGET),$(info cfg: host for $(t) is $(HOST_$(t))))
+-- 
+2.0.4
+

recipes/rust/rust.inc

@@ -11,6 +11,10 @@ LIC_FILES_CHKSUM ="\
 	file://COPYRIGHT;md5=0e8e4a3b5d8e1c90eb243d406369763a \
 "
 
+# Controls whether we use the local rust.
+# For -native, we set this to "0" by default.
+USE_LOCAL_RUST = "1"
+
 export RUST_TARGET_PATH="${WORKDIR}/targets/"
 
 ## arm-unknown-linux-gnueabihf
@@ -232,19 +236,23 @@ do_configure () {
 
 	# rpath is required otherwise rustc fails to resolve symbols
 
-	${S}/configure						\
-		"--enable-rpath"				\
-		"--disable-verify-install"			\
-		"--prefix=${prefix}"				\
-		"--target=${TARGET_SYS}"			\
-		"--host=${HOST_SYS}"				\
-		"--build=${BUILD_SYS}"				\
-		"--localstatedir=${localstatedir}"		\
-		"--sysconfdir=${sysconfdir}"			\
-		"--datadir=${datadir}"				\
-		"--infodir=${infodir}"				\
-		"--mandir=${mandir}"				\
-		"--libdir=${libdir}"
+	# TODO: consider setting --local-rust-root for -cross and -target
+    	# builds.
+	${S}/configure					\
+		"--enable-rpath"			\
+		"--disable-verify-install"		\
+		"--prefix=${prefix}"			\
+		"--target=${TARGET_SYS}"		\
+		"--host=${HOST_SYS}"			\
+		"--build=${BUILD_SYS}"			\
+		"--localstatedir=${localstatedir}"	\
+		"--sysconfdir=${sysconfdir}"		\
+		"--datadir=${datadir}"			\
+		"--infodir=${infodir}"			\
+		"--mandir=${mandir}"			\
+		"--libdir=${libdir}"			\
+    		${@base_conditional('USE_LOCAL_RUST', '1', '--enable-local-rust', '', d)} \
+    		${EXTRA_OECONF}
 }
 
 rust_runmake () {
@@ -281,9 +289,16 @@ do_install () {
 # Need to copy the *.so files to the appropriate target path
 # cp $prefix/lib/rustlib/`rust_triple "${TARGET_ARCH}" "${TARGET_VENDOR}" "${TARGET_OS}"`/lib/*.so ${target_libdir}/
 
-# cross-canadian: llvm configure fails for host while attempting to build host-only llvm
-BBCLASSEXTEND = "rust-cross native"
+## We abuse the BBCLASSEXTEND system to avoid creating multiple .bb for every
+## rust version (which is what gcc does).
+## 
+## Right now 'target' doesn't need any special settings, but at some point we may need to:
+##  - add an internal-rust-target
+##  - set the PN of this package to something like "rust-internal" or otherwise
+##	make the base unbuildable.
+BBCLASSEXTEND = "internal-rust-cross internal-rust-native"
 
+## This is a hack to have -cross provide -native, which doesn't quite work
 #python cross_virtclass_provides_native_handler () {
 #	classextend = e.data.getVar('BBCLASSEXTEND', True) or ""
 #	if "cross" not in classextend:

recipes/rust/rust_0.12.0+2014-11-14.bb

@@ -4,4 +4,5 @@ require rust-git.inc
 SRC_URI_append = "\
 	file://0001-src-etc-snapshot-support-triples-lacking-a-vendor.patch \
 	file://0001-get-snapshot-debug.patch \
+	file://0001-platform.mk-avoid-choking-on-i586.patch \
 "