From 6f3ee587ba5ad82178e9fe8a8d788729a3e18d6b Mon Sep 17 00:00:00 2001
From: Winter <winter@winter.cafe>
Date: Thu, 14 Sep 2023 19:16:34 -0400
Subject: [PATCH] std.zig.system.NativePaths: ignore linkage directives in
 `NIX_LDFLAGS`

`NIX_LDFLAGS` typically contains just `-rpath` and `-L`, which we already
handle. However, at least one setup hook in Nixpkgs [0] adds a linkage
directive to it. To prevent library paths from being missed (as I've
observed myself with `NIX_LDFLAGS` being `-liconv ...`, making it so that
*all* paths are missed), let's just skip over them.

[0]: https://github.com/NixOS/nixpkgs/blob/08f615eb1b3c5cf7481996f29c6092c7c891b15b/pkgs/development/libraries/libiconv/setup-hook.sh
---
 lib/std/zig/system/NativePaths.zig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/std/zig/system/NativePaths.zig b/lib/std/zig/system/NativePaths.zig
index 5fd4d56f30..ea07956417 100644
--- a/lib/std/zig/system/NativePaths.zig
+++ b/lib/std/zig/system/NativePaths.zig
@@ -60,6 +60,8 @@ pub fn detect(arena: Allocator, native_target: std.Target) !NativePaths {
                 const lib_path = word[2..];
                 try self.addLibDir(lib_path);
                 try self.addRPath(lib_path);
+            } else if (word.len > 2 and word[0] == '-' and word[1] == 'l') {
+                // There could still be paths after this.
             } else {
                 try self.addWarningFmt("Unrecognized C flag from NIX_LDFLAGS: {s}", .{word});
                 break;