fix the build on macos

Stat structs gain methods to abstract over the platform differences with
regards to mtime, ctime, atime.

std/fs/file.zig

@@ -248,12 +248,15 @@ pub const File = struct {
         }
 
         const st = try os.fstat(self.handle);
+        const atime = st.atime();
+        const mtime = st.mtime();
+        const ctime = st.ctime();
         return Stat{
             .size = @bitCast(u64, st.size),
             .mode = st.mode,
-            .atime = st.atim.tv_sec * std.time.ns_per_s + st.atim.tv_nsec,
-            .mtime = st.mtim.tv_sec * std.time.ns_per_s + st.mtim.tv_nsec,
-            .ctime = st.ctim.tv_sec * std.time.ns_per_s + st.ctim.tv_nsec,
+            .atime = atime.tv_sec * std.time.ns_per_s + atime.tv_nsec,
+            .mtime = mtime.tv_sec * std.time.ns_per_s + mtime.tv_nsec,
+            .ctime = ctime.tv_sec * std.time.ns_per_s + ctime.tv_nsec,
         };
     }
 

std/os/bits/darwin.zig

@@ -44,6 +44,11 @@ pub const mach_timebase_info_data = extern struct {
 };
 
 /// Renamed to Stat to not conflict with the stat function.
+/// atime, mtime, and ctime have functions to return `timespec`,
+/// because although this is a POSIX API, the layout and names of
+/// the structs are inconsistent across operating systems, and
+/// in C, macros are used to hide the differences. Here we use
+/// methods to accomplish this.
 pub const Stat = extern struct {
     dev: i32,
     mode: u16,
@@ -52,14 +57,14 @@ pub const Stat = extern struct {
     uid: u32,
     gid: u32,
     rdev: i32,
-    atime: usize,
-    atimensec: usize,
-    mtime: usize,
-    mtimensec: usize,
-    ctime: usize,
-    ctimensec: usize,
-    birthtime: usize,
-    birthtimensec: usize,
+    atimesec: isize,
+    atimensec: isize,
+    mtimesec: isize,
+    mtimensec: isize,
+    ctimesec: isize,
+    ctimensec: isize,
+    birthtimesec: isize,
+    birthtimensec: isize,
     size: i64,
     blocks: i64,
     blksize: i32,
@@ -67,6 +72,27 @@ pub const Stat = extern struct {
     gen: u32,
     lspare: i32,
     qspare: [2]i64,
+
+    pub fn atime(self: Stat) timespec {
+        return timespec{
+            .tv_sec = self.atimesec,
+            .tv_nsec = self.atimensec,
+        };
+    }
+
+    pub fn mtime(self: Stat) timespec {
+        return timespec{
+            .tv_sec = self.mtimesec,
+            .tv_nsec = self.mtimensec,
+        };
+    }
+
+    pub fn ctime(self: Stat) timespec {
+        return timespec{
+            .tv_sec = self.ctimesec,
+            .tv_nsec = self.ctimensec,
+        };
+    }
 };
 
 pub const timespec = extern struct {

std/os/bits/freebsd.zig

@@ -73,6 +73,12 @@ pub const msghdr_const = extern struct {
     msg_flags: i32,
 };
 
+/// Renamed to Stat to not conflict with the stat function.
+/// atime, mtime, and ctime have functions to return `timespec`,
+/// because although this is a POSIX API, the layout and names of
+/// the structs are inconsistent across operating systems, and
+/// in C, macros are used to hide the differences. Here we use
+/// methods to accomplish this.
 pub const Stat = extern struct {
     dev: u64,
     ino: u64,
@@ -96,6 +102,18 @@ pub const Stat = extern struct {
     flags: u32,
     gen: u64,
     __spare: [10]u64,
+
+    pub fn atime(self: Stat) timespec {
+        return self.atim;
+    }
+
+    pub fn mtime(self: Stat) timespec {
+        return self.mtim;
+    }
+
+    pub fn ctime(self: Stat) timespec {
+        return self.ctim;
+    }
 };
 
 pub const timespec = extern struct {

std/os/bits/linux/arm64.zig

@@ -396,6 +396,11 @@ pub const msghdr_const = extern struct {
 };
 
 /// Renamed to Stat to not conflict with the stat function.
+/// atime, mtime, and ctime have functions to return `timespec`,
+/// because although this is a POSIX API, the layout and names of
+/// the structs are inconsistent across operating systems, and
+/// in C, macros are used to hide the differences. Here we use
+/// methods to accomplish this.
 pub const Stat = extern struct {
     dev: u64,
     ino: u64,
@@ -414,6 +419,18 @@ pub const Stat = extern struct {
     mtim: timespec,
     ctim: timespec,
     __unused: [3]isize,
+
+    pub fn atime(self: Stat) timespec {
+        return self.atim;
+    }
+
+    pub fn mtime(self: Stat) timespec {
+        return self.mtim;
+    }
+
+    pub fn ctime(self: Stat) timespec {
+        return self.ctim;
+    }
 };
 
 pub const timespec = extern struct {

std/os/bits/linux/x86_64.zig

@@ -493,6 +493,11 @@ pub const msghdr_const = extern struct {
 };
 
 /// Renamed to Stat to not conflict with the stat function.
+/// atime, mtime, and ctime have functions to return `timespec`,
+/// because although this is a POSIX API, the layout and names of
+/// the structs are inconsistent across operating systems, and
+/// in C, macros are used to hide the differences. Here we use
+/// methods to accomplish this.
 pub const Stat = extern struct {
     dev: u64,
     ino: u64,
@@ -511,6 +516,18 @@ pub const Stat = extern struct {
     mtim: timespec,
     ctim: timespec,
     __unused: [3]isize,
+
+    pub fn atime(self: Stat) timespec {
+        return self.atim;
+    }
+
+    pub fn mtime(self: Stat) timespec {
+        return self.mtim;
+    }
+
+    pub fn ctime(self: Stat) timespec {
+        return self.ctim;
+    }
 };
 
 pub const timespec = extern struct {

std/os/bits/netbsd.zig

@@ -73,6 +73,12 @@ pub const msghdr_const = extern struct {
     msg_flags: i32,
 };
 
+/// Renamed to Stat to not conflict with the stat function.
+/// atime, mtime, and ctime have functions to return `timespec`,
+/// because although this is a POSIX API, the layout and names of
+/// the structs are inconsistent across operating systems, and
+/// in C, macros are used to hide the differences. Here we use
+/// methods to accomplish this.
 pub const Stat = extern struct {
     dev: u64,
     mode: u32,
@@ -94,6 +100,18 @@ pub const Stat = extern struct {
     flags: u32,
     gen: u32,
     __spare: [2]u32,
+
+    pub fn atime(self: Stat) timespec {
+        return self.atim;
+    }
+
+    pub fn mtime(self: Stat) timespec {
+        return self.mtim;
+    }
+
+    pub fn ctime(self: Stat) timespec {
+        return self.ctim;
+    }
 };
 
 pub const timespec = extern struct {