classes/rust_bin-common: avoid failing when os does not match

The rust_bin-common defines rust_target(), a function called at parsing
time by bitbake. Calling bb.fatal() in a multiconfig context builds is
problematic, because the alternate config might not build for Linux. For
example when building a baremetal companion firmware.

Yet, our multiconfig recipes are still evaluated during parsing, and in
this case, it makes more sense skipping the recipe rather than producing
an error. Use bb.parse.SkipRecipe() instead of bb.fatal().

Signed-off-by: Antonin Godard <[email protected]>

Author: antznin

classes/rust_bin-common.bbclass

@@ -42,7 +42,7 @@ def rust_target(d, spec_type):
         tune = []
 
     if not os == 'linux':
-        bb.fatal("Unsupported OS: %s. Only Linux is supported." % os)
+        raise bb.parse.SkipRecipe("Unsupported OS: %s. Only Linux is supported." % os)
 
     if arch in ["i386", "i486", "i586", "i686", "i786", "x86"]:
         arch = "i686"