rust-1.2.0: fix llvm link issue cause "multiple crates" error

Fixes #6 (until something else comes along and adds another '-L')

At the same time remove the no longer needed patch to tweak llvm
version checking, we disable those checks in configure now.

recipes/rust/files/rust-1.2.0/0010-configure-allow-the-llvm-shipped-as-a-submodule-to-b.patch

@@ -1,28 +0,0 @@
-From dd270c83db48947a4719ca330d6353b8633a053d Mon Sep 17 00:00:00 2001
-From: Cody P Schafer <dev@codyps.com>
-Date: Fri, 7 Aug 2015 15:50:44 -0400
-Subject: [PATCH 10/10] configure: allow the llvm shipped as a submodule to be
- used
-
----
- configure | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/configure b/configure
-index c07a517..4299e40 100755
---- a/configure
-+++ b/configure
-@@ -943,8 +943,8 @@ then
-     LLVM_CONFIG="$CFG_LLVM_ROOT/bin/llvm-config"
-     LLVM_VERSION=$($LLVM_CONFIG --version)
- 
--    case $LLVM_VERSION in
--        (3.[5-6]*)
-+    case ${LLVM_VERSION%svn} in
-+        (3.[567]*)
-             msg "found ok version of LLVM: $LLVM_VERSION"
-             ;;
-         (*)
--- 
-2.5.0
-

recipes/rust/files/rust-1.2.0/0010-mk-tell-rustc-that-we-re-only-looking-for-native-lib.patch

@@ -0,0 +1,36 @@
+From 64679c95a8f1fcc27702a0ada730d1fd320ab307 Mon Sep 17 00:00:00 2001
+From: Cody P Schafer <dev@codyps.com>
+Date: Wed, 26 Aug 2015 11:21:36 -0400
+Subject: [PATCH 10/10] mk: tell rustc that we're only looking for native libs
+ in the LLVM_LIBDIR
+
+This fixes the case where we try to re-build & re-install rust to the
+same prefix (without uninstalling) while using an llvm-root that is the
+same as the prefix.
+
+Without this, builds like that fail with:
+	'error: multiple dylib candidates for `std` found'
+
+See https://github.com/jmesmon/meta-rust/issues/6 for some details.
+
+May also be related to #20342.
+---
+ mk/main.mk | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/mk/main.mk b/mk/main.mk
+index 73fb58b..4075c24 100644
+--- a/mk/main.mk
++++ b/mk/main.mk
+@@ -294,7 +294,7 @@ LLVM_VERSION_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --version)
+ LLVM_BINDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --bindir)
+ LLVM_INCDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --includedir)
+ LLVM_LIBDIR_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --libdir)
+-LLVM_LIBDIR_RUSTFLAGS_$(1)=-L "$$(LLVM_LIBDIR_$(1))"
++LLVM_LIBDIR_RUSTFLAGS_$(1)=-L native="$$(LLVM_LIBDIR_$(1))"
+ LLVM_LIBS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --libs $$(LLVM_COMPONENTS))
+ LLVM_LDFLAGS_$(1)=$$(shell "$$(LLVM_CONFIG_$(1))" --ldflags)
+ ifeq ($$(findstring freebsd,$(1)),freebsd)
+-- 
+2.5.0
+

recipes/rust/files/rust-1.2.0/0011-configure-allow-the-llvm-shipped-as-a-submodule-to-b.patch

@@ -1,28 +0,0 @@
-From dc0e31730dbd22f457c65cac083c233d6fd9cd88 Mon Sep 17 00:00:00 2001
-From: Cody P Schafer <dev@codyps.com>
-Date: Fri, 7 Aug 2015 15:50:44 -0400
-Subject: [PATCH 11/11] configure: allow the llvm shipped as a submodule to be
- used
-
----
- configure | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/configure b/configure
-index c07a517..4299e40 100755
---- a/configure
-+++ b/configure
-@@ -943,8 +943,8 @@ then
-     LLVM_CONFIG="$CFG_LLVM_ROOT/bin/llvm-config"
-     LLVM_VERSION=$($LLVM_CONFIG --version)
- 
--    case $LLVM_VERSION in
--        (3.[5-6]*)
-+    case ${LLVM_VERSION%svn} in
-+        (3.[567]*)
-             msg "found ok version of LLVM: $LLVM_VERSION"
-             ;;
-         (*)
--- 
-2.5.0
-

recipes/rust/rust_1.2.0.bb

@@ -14,7 +14,7 @@ SRC_URI_append = "\
         file://${PP}/0007-mk-install-use-disable-rewrite-paths.patch \
         file://${PP}/0008-install-disable-ldconfig.patch \
         file://${PP}/0009-Remove-crate-metadata-from-symbol-hashing.patch \
-        file://${PP}/0010-configure-allow-the-llvm-shipped-as-a-submodule-to-b.patch \
+        file://${PP}/0010-mk-tell-rustc-that-we-re-only-looking-for-native-lib.patch \
 \
 	file://rust-installer/0001-add-option-to-disable-rewriting-of-install-paths.patch;patchdir=src/rust-installer \
 "