From 3cfc11396f1ceb5e28d5401c795fa9a02b898cc9 Mon Sep 17 00:00:00 2001
From: Hilton Chain <hako@ultrarare.space>
Date: Fri, 29 Nov 2024 14:13:46 +0800
Subject: [PATCH] Fix RUNPATH issue.

Add needed libraries and libc to RUNPATH when CROSS_LIBRARY_PATH or LIBRARY_PATH
is set.
---
 lib/std/Build/Step/Compile.zig |  3 +++
 src/link/Elf.zig               | 14 +++++++++++++
 src/main.zig                   | 37 +++++++++++++++++++++++++++++++++-
 3 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/lib/std/Build/Step/Compile.zig b/lib/std/Build/Step/Compile.zig
index 5bf0805e79..836733a96e 100644
--- a/lib/std/Build/Step/Compile.zig
+++ b/lib/std/Build/Step/Compile.zig
@@ -743,6 +743,9 @@ fn runPkgConfig(self: *Compile, lib_name: []const u8) !PkgConfigResult {
             try zig_cflags.appendSlice(&[_][]const u8{ "-D", macro });
         } else if (mem.startsWith(u8, tok, "-D")) {
             try zig_cflags.append(tok);
+        } else if (mem.startsWith(u8, tok, "-Wl,-rpath=")) {
+            const dir = tok["-Wl,-rpath=".len..];
+            try zig_libs.appendSlice(&[_][]const u8{ "-L", dir });
         } else if (b.debug_pkg_config) {
             return self.step.fail("unknown pkg-config flag '{s}'", .{tok});
         }
diff --git a/src/link/Elf.zig b/src/link/Elf.zig
index 83a3d91346..6fd79fd1cd 100644
--- a/src/link/Elf.zig
+++ b/src/link/Elf.zig
@@ -1505,6 +1505,13 @@ fn dumpArgv(self: *Elf, comp: *Compilation) !void {
             try argv.append(rpath);
         }
 
+        if (comp.config.link_libc and link_mode == .dynamic and std.zig.system.NativePaths.isGuix(arena)) {
+            if (self.base.comp.libc_installation) |libc_installation| {
+                try argv.append("-rpath");
+                try argv.append(libc_installation.crt_dir.?);
+            }
+        }
+
         try argv.appendSlice(&.{
             "-z",
             try std.fmt.allocPrint(arena, "stack-size={d}", .{self.base.stack_size}),
@@ -2536,6 +2543,13 @@ fn linkWithLLD(self: *Elf, arena: Allocator, prog_node: *std.Progress.Node) !voi
             }
         }
 
+        if (comp.config.link_libc and link_mode == .dynamic and std.zig.system.NativePaths.isGuix(arena)) {
+            if (self.base.comp.libc_installation) |libc_installation| {
+                try argv.append("-rpath");
+                try argv.append(libc_installation.crt_dir.?);
+            }
+        }
+
         for (self.symbol_wrap_set.keys()) |symbol_name| {
             try argv.appendSlice(&.{ "-wrap", symbol_name });
         }
diff --git a/src/main.zig b/src/main.zig
index d27b63d5a3..5b06739b4e 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -3701,7 +3701,7 @@ fn createModule(
                 create_module.want_native_include_dirs = true;
         }
 
-        if (create_module.each_lib_rpath orelse resolved_target.is_native_os) {
+        if (create_module.each_lib_rpath orelse false) {
             try create_module.rpath_list.appendSlice(arena, create_module.lib_dirs.items);
         }
 
@@ -3921,6 +3921,24 @@ fn createModule(
         if (create_module.resolved_system_libs.len != 0)
             create_module.opts.any_dyn_libs = true;
 
+        if (std.zig.system.NativePaths.isGuix(arena)) {
+            for (create_module.resolved_system_libs.items(.name)) |lib_name| {
+                for (create_module.lib_dirs.items) |lib_dir_path| {
+                    if (try libPathExists(arena, lib_dir_path, lib_name, target)) {
+                        try create_module.rpath_list.append(arena, lib_dir_path);
+                        break;
+                    }
+                }
+            }
+            for (create_module.link_objects.items) |obj| {
+                if (Compilation.classifyFileExt(obj.path) == .shared_library) {
+                    const lib_dir_path = fs.path.dirname(obj.path) orelse continue;
+                    if (obj.loption) continue;
+                    try create_module.rpath_list.append(arena, lib_dir_path);
+                }
+            }
+        }
+
         create_module.resolved_options = Compilation.Config.resolve(create_module.opts) catch |err| switch (err) {
             error.WasiExecModelRequiresWasi => fatal("only WASI OS targets support execution model", .{}),
             error.SharedMemoryIsWasmOnly => fatal("only WebAssembly CPU targets support shared memory", .{}),
@@ -7348,3 +7366,20 @@ fn handleModArg(
     c_source_files_owner_index.* = create_module.c_source_files.items.len;
     rc_source_files_owner_index.* = create_module.rc_source_files.items.len;
 }
+
+fn libPathExists(
+    arena: Allocator,
+    lib_dir_path: []const u8,
+    lib_name: []const u8,
+    target: std.Target,
+) !bool {
+    const sep = fs.path.sep_str;
+    const lib_path = try std.fmt.allocPrint(arena, "{s}" ++ sep ++ "{s}{s}{s}", .{
+        lib_dir_path,
+        target.libPrefix(),
+        lib_name,
+        target.dynamicLibSuffix(),
+    });
+    fs.cwd().access(lib_path, .{}) catch return false;
+    return true;
+}
-- 
2.46.0