Commit e05923f34b

@@ -12,6 +12,8 @@ pub extern "c" fn _dyld_get_image_header(image_index: u32) ?*mach_header;
 pub extern "c" fn _dyld_get_image_vmaddr_slide(image_index: u32) usize;
 pub extern "c" fn _dyld_get_image_name(image_index: u32) [*:0]const u8;
 
+pub extern "c" fn @"realpath$DARWIN_EXTSN"(noalias file_name: [*:0]const u8, noalias resolved_name: [*]u8) ?[*:0]u8;
+
 pub extern "c" fn __getdirentries64(fd: c_int, buf_ptr: [*]u8, buf_len: usize, basep: *i64) isize;
 pub extern "c" fn @"fstat$INODE64"(fd: fd_t, buf: *Stat) c_int;
 

@@ -111,7 +111,16 @@ pub extern "c" fn dup(fd: fd_t) c_int;
 pub extern "c" fn dup2(old_fd: fd_t, new_fd: fd_t) c_int;
 pub extern "c" fn readlink(noalias path: [*:0]const u8, noalias buf: [*]u8, bufsize: usize) isize;
 pub extern "c" fn readlinkat(dirfd: fd_t, noalias path: [*:0]const u8, noalias buf: [*]u8, bufsize: usize) isize;
-pub extern "c" fn realpath(noalias file_name: [*:0]const u8, noalias resolved_name: [*]u8) ?[*:0]u8;
+
+pub usingnamespace switch (builtin.os.tag) {
+    .macosx, .ios, .watchos, .tvos => struct {
+        pub const realpath = @"realpath$DARWIN_EXTSN";
+    },
+    else => struct {
+        pub extern "c" fn realpath(noalias file_name: [*:0]const u8, noalias resolved_name: [*]u8) ?[*:0]u8;
+    },
+};
+
 pub extern "c" fn setreuid(ruid: c_uint, euid: c_uint) c_int;
 pub extern "c" fn setregid(rgid: c_uint, egid: c_uint) c_int;
 pub extern "c" fn rmdir(path: [*:0]const u8) c_int;