rust-common: Set llvm-target correctly for cross SDK targets

When a 'BUILD' target is requested we shouldn't be looking at TARGET_SYS but
at BUILD_SYS. Due to the way rust mangles triplets, we need the HOST_SYS triplet
to work with existing code - fixing that issue is a separate patch.

Also drop the arch_abi argument, it doens't make any sense to a getVar() call
and was a copy and paste error.

Based on a patch from Otavio Salvador <otavio@ossystems.com.br> but separated out
and tweaked.

Fixes: bd36593ba3 ("rust-common: Drop LLVM_TARGET and simplify")

(From OE-Core rev: cccbb8358be830b83a43fe1ff8a88932dee1c228)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit d554161a045d12411f288394e253c54aa4c1257c)
Signed-off-by: Jermain Horsman <jermain.horsman@nedap.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/meta/recipes-devtools/rust/rust-common.inc b/meta/recipes-devtools/rust/rust-common.inc
index db0bd8fc1b..ac00fd3d43 100644
--- a/meta/recipes-devtools/rust/rust-common.inc
+++ b/meta/recipes-devtools/rust/rust-common.inc
@@ -307,9 +307,13 @@ def rust_gen_target(d, thing, wd, features, cpu, arch, abi=""):
     features = features or d.getVarFlag('FEATURES', arch_abi) or ""
     features = features.strip()
 
+    llvm_target = d.getVar('RUST_TARGET_SYS')
+    if thing == "BUILD":
+        llvm_target = d.getVar('RUST_HOST_SYS')
+
     # build tspec
     tspec = {}
-    tspec['llvm-target'] = d.getVar('RUST_TARGET_SYS', arch_abi)
+    tspec['llvm-target'] = llvm_target
     tspec['data-layout'] = d.getVarFlag('DATA_LAYOUT', arch_abi)
     tspec['max-atomic-width'] = int(d.getVarFlag('MAX_ATOMIC_WIDTH', arch_abi))
     tspec['target-pointer-width'] = d.getVarFlag('TARGET_POINTER_WIDTH', arch_abi)