rust-cross: Simplfy the rust_gen_target calls

Match the code in rust-cross-canadian so that further simplifications
can be considered in future.

(From OE-Core rev: 9fb5f81f58306b2d355049698b6a17d045bd5e1e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 5cb62d0a33777cb9afb1eea5f736a2580ce50dc7)
Signed-off-by: Jermain Horsman <jermain.horsman@nedap.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 10 insertions, 18 deletions

diff --git a/meta/recipes-devtools/rust/rust-common.inc b/meta/recipes-devtools/rust/rust-common.inc
index 3252827818..a73367bbd5 100644
--- a/meta/recipes-devtools/rust/rust-common.inc
+++ b/meta/recipes-devtools/rust/rust-common.inc
@@ -119,12 +119,12 @@ def llvm_features(d):
 
 
 ## arm-unknown-linux-gnueabihf
-DATA_LAYOUT[arm] = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
-TARGET_ENDIAN[arm] = "little"
-TARGET_POINTER_WIDTH[arm] = "32"
-TARGET_C_INT_WIDTH[arm] = "32"
-MAX_ATOMIC_WIDTH[arm] = "64"
-FEATURES[arm] = "+v6,+vfp2"
+DATA_LAYOUT[arm-eabi] = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+TARGET_ENDIAN[arm-eabi] = "little"
+TARGET_POINTER_WIDTH[arm-eabi] = "32"
+TARGET_C_INT_WIDTH[arm-eabi] = "32"
+MAX_ATOMIC_WIDTH[arm-eabi] = "64"
+FEATURES[arm-eabi] = "+v6,+vfp2"
 
 ## armv7-unknown-linux-gnueabihf
 DATA_LAYOUT[armv7-eabi] = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
diff --git a/meta/recipes-devtools/rust/rust-cross.inc b/meta/recipes-devtools/rust/rust-cross.inc
index 4c026b1f38..2e47a3aa5f 100644
--- a/meta/recipes-devtools/rust/rust-cross.inc
+++ b/meta/recipes-devtools/rust/rust-cross.inc
@@ -1,17 +1,9 @@
 python do_rust_gen_targets () {
     wd = d.getVar('WORKDIR') + '/targets/'
-    # It is important 'TARGET' is last here so that it overrides our less
-    # informed choices for BUILD & HOST if TARGET happens to be the same as
-    # either of them.
-    for thing in ['BUILD', 'HOST', 'TARGET']:
-        bb.debug(1, "rust_gen_target for " + thing)
-        features = ""
-        cpu = "generic"
-        arch = d.getVar('{}_ARCH'.format(thing))
-        if thing is "TARGET":
-            features = d.getVar('TARGET_LLVM_FEATURES') or ""
-            cpu = d.getVar('TARGET_LLVM_CPU')
-        rust_gen_target(d, thing, wd, features, cpu, arch)
+    # Order of BUILD, HOST, TARGET is important in case the files overwrite, most specific last
+    rust_gen_target(d, 'BUILD', wd, "", "generic", d.getVar('BUILD_ARCH'))
+    rust_gen_target(d, 'HOST', wd, "", "generic", d.getVar('HOST_ARCH'))
+    rust_gen_target(d, 'TARGET', wd, d.getVar('TARGET_LLVM_FEATURES') or "", d.getVar('TARGET_LLVM_CPU'), d.getVar('TARGET_ARCH'))
 }
 
 # Otherwise we'll depend on what we provide