Fix libc.

zig/lib/std/Target.zig

@@ -405,7 +405,7 @@ pub const Os = struct {
     /// On Darwin, we always link libSystem which contains libc.
     /// Similarly on FreeBSD and NetBSD we always link system libc
     /// since this is the stable syscall interface.
-    pub fn requiresLibC(os: Os) bool {
+    pub fn requiresLibC(os: Os, cpu: Cpu) bool {
         return switch (os.tag) {
             .freebsd,
             .netbsd,
@@ -420,7 +420,12 @@ pub const Os = struct {
             .illumos,
             => true,
 
-            .linux,
+            .linux => blk: {
+                break :blk switch (cpu.arch) {
+                    .loongarch64 => true,
+                    else => false,
+                };
+            },
             .windows,
             .freestanding,
             .ananas,

zig/src/target.zig

@@ -80,6 +80,7 @@ pub const available_libcs = [_]ArchOsAbi{
     .{ .arch = .x86_64, .os = .linux, .abi = .musl },
     .{ .arch = .x86_64, .os = .windows, .abi = .gnu },
     .{ .arch = .x86_64, .os = .macos, .abi = .none, .os_ver = .{ .major = 10, .minor = 7, .patch = 0 } },
+    .{ .arch = .loongarch64, .os = .linux, .abi = .gnu, .glibc_min = .{ .major = 2, .minor = 36, .patch = 0 } },
 };
 
 /// Minimum glibc version, due to dependencies from the Zig standard library on glibc symbols
@@ -186,7 +187,7 @@ pub fn cannotDynamicLink(target: std.Target) bool {
 /// Similarly on FreeBSD and NetBSD we always link system libc
 /// since this is the stable syscall interface.
 pub fn osRequiresLibC(target: std.Target) bool {
-    return target.os.requiresLibC();
+    return target.os.requiresLibC(target.cpu);
 }
 
 pub fn libcNeedsLibUnwind(target: std.Target) bool {