rust.inc: Fix for cross compilation configuration

For cross compilation, build, host and target may be different. Ensure
the main rust config has the appropriate sections added to match the
configurations.

(From OE-Core rev: e2cdbf9df8d3f90b5a7ba35288c5db4f252d134d)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 15 insertions, 5 deletions

diff --git a/meta/recipes-devtools/rust/rust.inc b/meta/recipes-devtools/rust/rust.inc
index 12c86e02c4..7c16b8165b 100644
--- a/meta/recipes-devtools/rust/rust.inc
+++ b/meta/recipes-devtools/rust/rust.inc
@@ -73,7 +73,7 @@ python do_configure() {
     config = configparser.RawConfigParser()
 
     # [target.ARCH-poky-linux]
-    host_section = "target.{}".format(d.getVar('RUST_TARGET_SYS', True))
+    host_section = "target.{}".format(d.getVar('RUST_HOST_SYS', True))
     config.add_section(host_section)
 
     llvm_config_target = d.expand("${RUST_ALTERNATE_EXE_PATH}")
@@ -86,12 +86,22 @@ python do_configure() {
     # If we don't do this rust-native will compile it's own llvm for BUILD.
     # [target.${BUILD_ARCH}-unknown-linux-gnu]
     build_section = "target.{}".format(d.getVar('RUST_BUILD_SYS', True))
-    config.add_section(build_section)
+    if build_section != host_section:
+        config.add_section(build_section)
 
-    config.set(build_section, "llvm-config", e(llvm_config_build))
+        config.set(build_section, "llvm-config", e(llvm_config_build))
 
-    config.set(build_section, "cxx", e(d.expand("${RUST_BUILD_CXX}")))
-    config.set(build_section, "cc", e(d.expand("${RUST_BUILD_CC}")))
+        config.set(build_section, "cxx", e(d.expand("${RUST_BUILD_CXX}")))
+        config.set(build_section, "cc", e(d.expand("${RUST_BUILD_CC}")))
+
+    target_section = "target.{}".format(d.getVar('RUST_TARGET_SYS', True))
+    if target_section != host_section and target_section != build_section:
+        config.add_section(target_section)
+
+        config.set(target_section, "llvm-config", e(llvm_config_target))
+
+        config.set(target_section, "cxx", e(d.expand("${RUST_TARGET_CXX}")))
+        config.set(target_section, "cc", e(d.expand("${RUST_TARGET_CC}")))
 
     # [llvm]
     config.add_section("llvm")