From 99e7ba24b17d9b0a948c8fd01904d3597b5d4f84 Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Mon, 22 Mar 2021 23:34:37 +1100
Subject: [PATCH] Add LibExeObjStep.linker_allow_shlib_undefined field to set
 --allow-shlib-undefined

---
 lib/std/build.zig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/std/build.zig b/lib/std/build.zig
index 05871efba8..fa7fb9f018 100644
--- a/lib/std/build.zig
+++ b/lib/std/build.zig
@@ -1386,6 +1386,8 @@ pub const LibExeObjStep = struct {
     /// safely garbage-collected during the linking phase.
     link_function_sections: bool = false,
 
+    linker_allow_shlib_undefined: ?bool = null,
+
     /// Uses system Wine installation to run cross compiled Windows build artifacts.
     enable_wine: bool = false,
 
@@ -2338,6 +2340,9 @@ pub const LibExeObjStep = struct {
         if (self.link_function_sections) {
             try zig_args.append("-ffunction-sections");
         }
+        if (self.linker_allow_shlib_undefined) |x| {
+            try zig_args.append(if (x) "--allow-shlib-undefined" else "--no-allow-shlib-undefined");
+        }
         if (self.single_threaded) {
             try zig_args.append("--single-threaded");
         }