@@ 0,0 1,27 @@
+From 97d6b38ee78941b96bfd30dc2c814fd9c38561e3 Mon Sep 17 00:00:00 2001
+From: Hilton Chain <hako@ultrarare.space>
+Date: Wed, 27 Nov 2024 11:55:44 +0800
+Subject: [PATCH] Fix RUNPATH issue.
+
+Add needed libraries and libc to RUNPATH when CROSS_LIBRARY_PATH or LIBRARY_PATH
+is set.
+---
+ src/Compilation.zig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/Compilation.zig b/src/Compilation.zig
+index b44c7da78d..be28538e6a 100644
+--- a/src/Compilation.zig
++++ b/src/Compilation.zig
+@@ -1515,7 +1515,7 @@ pub fn create(gpa: Allocator, options: InitOptions) !*Compilation {
+             .llvm_cpu_features = llvm_cpu_features,
+             .skip_linker_dependencies = options.skip_linker_dependencies,
+             .parent_compilation_link_libc = options.parent_compilation_link_libc,
+-            .each_lib_rpath = options.each_lib_rpath orelse options.is_native_os,
++            .each_lib_rpath = std.zig.system.NativePaths.isGuix(arena) or options.each_lib_rpath orelse false,
+             .disable_lld_caching = options.disable_lld_caching,
+             .subsystem = options.subsystem,
+             .is_test = options.is_test,
+-- 
+2.46.0
+


@@ 0,0 1,136 @@
+From 751da768de9b58126fef8f69c70eea5c4180f739 Mon Sep 17 00:00:00 2001
+From: Hilton Chain <hako@ultrarare.space>
+Date: Wed, 27 Nov 2024 11:54:51 +0800
+Subject: [PATCH] Use system paths.
+
+Prefer Guix search paths and support Guix cross builds.
+---
+ lib/std/zig/system/NativePaths.zig      | 56 ++++++++++++++++++++++++-
+ lib/std/zig/system/NativeTargetInfo.zig | 25 +++++++++--
+ src/main.zig                            |  3 +-
+ 3 files changed, 78 insertions(+), 6 deletions(-)
+
+diff --git a/lib/std/zig/system/NativePaths.zig b/lib/std/zig/system/NativePaths.zig
+index 8e3e46e481..bb6ac32da6 100644
+--- a/lib/std/zig/system/NativePaths.zig
++++ b/lib/std/zig/system/NativePaths.zig
+@@ -25,7 +25,53 @@ pub fn detect(allocator: Allocator, native_info: NativeTargetInfo) !NativePaths
+         .warnings = ArrayList([:0]u8).init(allocator),
+     };
+     errdefer self.deinit();
+-
++    if (isGuix(allocator)) {
++        const guix_cross_include_paths = [_][]const u8{ "CROSS_C_INCLUDE_PATH", "CROSS_CPLUS_INCLUDE_PATH" };
++        for (guix_cross_include_paths) |env_var| {
++            if (process.getEnvVarOwned(allocator, env_var)) |include_path| {
++                var it = mem.tokenize(u8, include_path, ":");
++                while (it.next()) |dir|
++                    try self.addIncludeDir(dir);
++            } else |err| switch (err) {
++                error.InvalidUtf8 => {},
++                error.EnvironmentVariableNotFound => {},
++                error.OutOfMemory => |e| return e,
++            }
++        }
++        if (process.getEnvVarOwned(allocator, "CROSS_LIBRARY_PATH")) |library_path| {
++            var it = mem.tokenize(u8, library_path, ":");
++            while (it.next()) |dir|
++                try self.addLibDir(dir);
++        } else |err| switch (err) {
++            error.InvalidUtf8 => {},
++            error.EnvironmentVariableNotFound => {},
++            error.OutOfMemory => |e| return e,
++        }
++        if (!isCrossGuix(allocator)) {
++            const guix_include_paths = [_][]const u8{ "C_INCLUDE_PATH", "CPLUS_INCLUDE_PATH" };
++            for (guix_include_paths) |env_var| {
++                if (process.getEnvVarOwned(allocator, env_var)) |include_path| {
++                    var it = mem.tokenize(u8, include_path, ":");
++                    while (it.next()) |dir|
++                        try self.addIncludeDir(dir);
++                } else |err| switch (err) {
++                    error.InvalidUtf8 => {},
++                    error.EnvironmentVariableNotFound => {},
++                    error.OutOfMemory => |e| return e,
++                }
++            }
++            if (process.getEnvVarOwned(allocator, "LIBRARY_PATH")) |library_path| {
++                var it = mem.tokenize(u8, library_path, ":");
++                while (it.next()) |dir|
++                    try self.addLibDir(dir);
++            } else |err| switch (err) {
++                error.InvalidUtf8 => {},
++                error.EnvironmentVariableNotFound => {},
++                error.OutOfMemory => |e| return e,
++            }
++        }
++        return self;
++    }
+     var is_nix = false;
+     if (process.getEnvVarOwned(allocator, "NIX_CFLAGS_COMPILE")) |nix_cflags_compile| {
+         defer allocator.free(nix_cflags_compile);
+@@ -203,3 +249,11 @@ fn appendArray(self: *NativePaths, array: *ArrayList([:0]u8), s: []const u8) !vo
+     errdefer array.allocator.free(item);
+     try array.append(item);
+ }
++
++pub fn isCrossGuix(arena: Allocator) bool {
++    return process.hasEnvVar(arena, "CROSS_LIBRARY_PATH") catch false;
++}
++
++pub fn isGuix(arena: Allocator) bool {
++    return isCrossGuix(arena) or process.hasEnvVar(arena, "LIBRARY_PATH") catch false;
++}
+diff --git a/lib/std/zig/system/NativeTargetInfo.zig b/lib/std/zig/system/NativeTargetInfo.zig
+index af41fc7905..4ee5ee0b6e 100644
+--- a/lib/std/zig/system/NativeTargetInfo.zig
++++ b/lib/std/zig/system/NativeTargetInfo.zig
+@@ -784,10 +784,27 @@ fn defaultAbiAndDynamicLinker(cpu: Target.Cpu, os: Target.Os, cross_target: Cros
+     };
+     return NativeTargetInfo{
+         .target = target,
+-        .dynamic_linker = if (cross_target.dynamic_linker.get() == null)
+-            target.standardDynamicLinkerPath()
+-        else
+-            cross_target.dynamic_linker,
++        .dynamic_linker = if (cross_target.dynamic_linker.get() == null) blk: {
++            var standard_linker = target.standardDynamicLinkerPath();
++            if (standard_linker.get()) |standard_linker_path| {
++                if (builtin.os.tag != .windows and builtin.os.tag != .wasi) {
++                    if (std.os.getenv("CROSS_LIBRARY_PATH") orelse std.os.getenv("LIBRARY_PATH")) |library_path| {
++                        const linker_basename = fs.path.basename(standard_linker_path);
++                        var buffer: [255]u8 = undefined;
++                        var it = mem.tokenize(u8, library_path, ":");
++                        while (it.next()) |dir| {
++                            const linker_fullpath = std.fmt.bufPrint(&buffer, "{s}{s}{s}", .{ dir, fs.path.sep_str, linker_basename }) catch "";
++                            const guix_linker_path = fs.cwd().realpath(linker_fullpath, &buffer) catch "";
++                            if (guix_linker_path.len != 0) {
++                                standard_linker.set(guix_linker_path);
++                                break;
++                            }
++                        }
++                    }
++                }
++            }
++            break :blk standard_linker;
++        } else cross_target.dynamic_linker,
+     };
+ }
+ 
+diff --git a/src/main.zig b/src/main.zig
+index 42daa95d3a..1ab9d0f7aa 100644
+--- a/src/main.zig
++++ b/src/main.zig
+@@ -2039,7 +2039,8 @@ fn buildOutputType(
+             want_native_include_dirs = true;
+     }
+ 
+-    if (sysroot == null and cross_target.isNativeOs() and (system_libs.count() != 0 or want_native_include_dirs)) {
++    if (std.zig.system.NativePaths.isCrossGuix(arena) or
++        sysroot == null and cross_target.isNativeOs() and (system_libs.count() != 0 or want_native_include_dirs)) {
+         const paths = std.zig.system.NativePaths.detect(arena, target_info) catch |err| {
+             fatal("unable to detect native system paths: {s}", .{@errorName(err)});
+         };
+-- 
+2.46.0
+


@@ 1,148 0,0 @@
-This patch replaces the OS-specific detection mechanism by one that solely
-relies on environment variables.  This has the benefit that said environment
-variables can be used as search paths in Guix.
-
-diff --git a/lib/std/zig/system/NativePaths.zig b/lib/std/zig/system/NativePaths.zig
-index 8e3e46e48..1ed9d3206 100644
---- a/lib/std/zig/system/NativePaths.zig
-+++ b/lib/std/zig/system/NativePaths.zig
-@@ -26,73 +26,42 @@ pub fn detect(allocator: Allocator, native_info: NativeTargetInfo) !NativePaths
-     };
-     errdefer self.deinit();
- 
--    var is_nix = false;
--    if (process.getEnvVarOwned(allocator, "NIX_CFLAGS_COMPILE")) |nix_cflags_compile| {
--        defer allocator.free(nix_cflags_compile);
--
--        is_nix = true;
--        var it = mem.tokenize(u8, nix_cflags_compile, " ");
-+    // TODO: Support cross-compile paths?
-+    if (process.getEnvVarOwned(allocator, "C_INCLUDE_PATH")) |c_include_path| {
-+        defer allocator.free(c_include_path);
-+        var it = mem.tokenize(u8, c_include_path, ":");
-         while (true) {
--            const word = it.next() orelse break;
--            if (mem.eql(u8, word, "-isystem")) {
--                const include_path = it.next() orelse {
--                    try self.addWarning("Expected argument after -isystem in NIX_CFLAGS_COMPILE");
--                    break;
--                };
--                try self.addIncludeDir(include_path);
--            } else {
--                if (mem.startsWith(u8, word, "-frandom-seed=")) {
--                    continue;
--                }
--                try self.addWarningFmt("Unrecognized C flag from NIX_CFLAGS_COMPILE: {s}", .{word});
--            }
-+            const dir = it.next() orelse break;
-+            try self.addIncludeDir(dir);
-         }
-     } else |err| switch (err) {
-         error.InvalidUtf8 => {},
-         error.EnvironmentVariableNotFound => {},
-         error.OutOfMemory => |e| return e,
-     }
--    if (process.getEnvVarOwned(allocator, "NIX_LDFLAGS")) |nix_ldflags| {
--        defer allocator.free(nix_ldflags);
--
--        is_nix = true;
--        var it = mem.tokenize(u8, nix_ldflags, " ");
-+    if (process.getEnvVarOwned(allocator, "CPLUS_INCLUDE_PATH")) |cplus_include_path| {
-+        defer allocator.free(cplus_include_path);
-+        var it = mem.tokenize(u8, cplus_include_path, ":");
-         while (true) {
--            const word = it.next() orelse break;
--            if (mem.eql(u8, word, "-rpath")) {
--                const rpath = it.next() orelse {
--                    try self.addWarning("Expected argument after -rpath in NIX_LDFLAGS");
--                    break;
--                };
--                try self.addRPath(rpath);
--            } else if (word.len > 2 and word[0] == '-' and word[1] == 'L') {
--                const lib_path = word[2..];
--                try self.addLibDir(lib_path);
--            } else {
--                try self.addWarningFmt("Unrecognized C flag from NIX_LDFLAGS: {s}", .{word});
--                break;
--            }
-+            const dir = it.next() orelse break;
-+            try self.addIncludeDir(dir);
-         }
-     } else |err| switch (err) {
-         error.InvalidUtf8 => {},
-         error.EnvironmentVariableNotFound => {},
-         error.OutOfMemory => |e| return e,
-     }
--    if (is_nix) {
--        return self;
--    }
--
--    if (comptime builtin.target.isDarwin()) {
--        try self.addIncludeDir("/usr/include");
--        try self.addIncludeDir("/usr/local/include");
--
--        try self.addLibDir("/usr/lib");
--        try self.addLibDir("/usr/local/lib");
--
--        try self.addFrameworkDir("/Library/Frameworks");
--        try self.addFrameworkDir("/System/Library/Frameworks");
--
--        return self;
-+    if (process.getEnvVarOwned(allocator, "LIBRARY_PATH")) |library_path| {
-+        defer allocator.free(library_path);
-+        var it = mem.tokenize(u8, library_path, ":");
-+        while (true) {
-+            const dir = it.next() orelse break;
-+            try self.addLibDir(dir);
-+        }
-+    } else |err| switch (err) {
-+        error.InvalidUtf8 => {},
-+        error.EnvironmentVariableNotFound => {},
-+        error.OutOfMemory => |e| return e,
-     }
- 
-     if (comptime native_target.os.tag == .solaris) {
-@@ -106,32 +75,17 @@ pub fn detect(allocator: Allocator, native_info: NativeTargetInfo) !NativePaths
-         return self;
-     }
- 
--    if (native_target.os.tag != .windows) {
--        const triple = try native_target.linuxTriple(allocator);
--        const qual = native_target.cpu.arch.ptrBitWidth();
--
--        // TODO: $ ld --verbose | grep SEARCH_DIR
--        // the output contains some paths that end with lib64, maybe include them too?
--        // TODO: what is the best possible order of things?
--        // TODO: some of these are suspect and should only be added on some systems. audit needed.
--
--        try self.addIncludeDir("/usr/local/include");
--        try self.addLibDirFmt("/usr/local/lib{d}", .{qual});
--        try self.addLibDir("/usr/local/lib");
--
--        try self.addIncludeDirFmt("/usr/include/{s}", .{triple});
--        try self.addLibDirFmt("/usr/lib/{s}", .{triple});
--
--        try self.addIncludeDir("/usr/include");
--        try self.addLibDirFmt("/lib{d}", .{qual});
--        try self.addLibDir("/lib");
--        try self.addLibDirFmt("/usr/lib{d}", .{qual});
--        try self.addLibDir("/usr/lib");
--
--        // example: on a 64-bit debian-based linux distro, with zlib installed from apt:
--        // zlib.h is in /usr/include (added above)
--        // libz.so.1 is in /lib/x86_64-linux-gnu (added here)
--        try self.addLibDirFmt("/lib/{s}", .{triple});
-+    if (process.getEnvVarOwned(allocator, "DYLD_FRAMEWORK_PATH")) |dyld_framework_path| {
-+        defer allocator.free(dyld_framework_path);
-+        var it = mem.tokenize(u8, dyld_framework_path, ":");
-+        while (true) {
-+            const dir = it.next() orelse break;
-+            try self.addFrameworkDir(dir);
-+        }
-+    } else |err| switch (err) {
-+        error.InvalidUtf8 => {},
-+        error.EnvironmentVariableNotFound => {},
-+        error.OutOfMemory => |e| return e,
-     }
- 
-     return self;