sysroot specification

classes/internal-rust-cross.bbclass

@@ -7,14 +7,15 @@ DEPENDS += "virtual/${TARGET_PREFIX}gcc rust-native"
 PROVIDES = "virtual/${TARGET_PREFIX}rust"
 PN = "rust-cross-${TARGET_ARCH}"
 
+# The same value as ${TOOLCHAIN_OPTIONS}. We can't use that variable directly
+# here because cross.bblcass is "helpful" and blanks it out.
+PRE_LINK_ARGS_PREPEND = "--sysroot=${STAGING_DIR_TARGET}"
+
 ## gcc-cross settings
 # INHIBIT_DEFAULT_DEPS = "1"
 # INHIBIT_PACKAGE_STRIP = "1"
 # ARCH_FLAGS_FOR_TARGET += "-isystem${STAGING_DIR_NATIVE}${target_includedir}"
 
-# TODO: use rust-native instead of a snapshot
-EXTRA_OECONF += ""
-
 # cross.bbclass is "helpful" and overrides our do_install. Tell it not to.
 do_install () {
 	rust_do_install