From 5cfdc82e6a09c7b6ff7e63aae991117118f01596 Mon Sep 17 00:00:00 2001
From: UebelAndre <github@uebelandre.com>
Date: Mon, 6 Mar 2023 09:36:14 -0800
Subject: [PATCH] Skip detecting abi for empty values (#1830)

---
 rust/platform/triple_mappings.bzl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rust/platform/triple_mappings.bzl b/rust/platform/triple_mappings.bzl
index 1ff9dd0220..f5b0acf0a4 100644
--- a/rust/platform/triple_mappings.bzl
+++ b/rust/platform/triple_mappings.bzl
@@ -218,6 +218,9 @@ def abi_to_constraints(abi, *, arch = None, system = None):
         List: A list of labels to constraint values
     """
 
+    if not abi:
+        return []
+
     if abi == "sim":
         if not system:
             fail("The ABI value {} is ambiguous. Please specify a system to match the right constraints.")