Basic work toward compiling on Darwin

configure

@@ -37,7 +37,7 @@ case "$(uname)" in
         # These systems typically use GCC.
         SCRIPT_ARGS="${SCRIPT_ARGS} --cc=gcc"
         ;;
-    OpenBSD|FreeBSD)
+    OpenBSD|FreeBSD|Darwin)
         # These systems typically use Clang.
         SCRIPT_ARGS="${SCRIPT_ARGS} --cc=clang"
         ;;

include/Cytoplasm/Platform.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022-2024 Jordan Bancino <@jordan:bancino.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef CYTOPLASM_PLATFORM_H
+#define CYTOPLASM_PLATFORM_H
+
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
+    #define PLATFORM_WINDOWS
+
+   #ifdef _WIN64
+      #define PLATFORM_WIN64
+   #else
+      #define PLATFORM_WIN32
+   #endif
+#elif __APPLE__
+    #define PLATFORM_DARWIN
+
+    #include <TargetConditionals.h>
+    #if TARGET_IPHONE_SIMULATOR
+        // iOS, tvOS, or watchOS Simulator
+        #define PLATFORM_IPHONE
+    #elif TARGET_OS_MACCATALYST
+         // Mac's Catalyst (ports iOS API into Mac, like UIKit).
+        #define PLATFORM_CATALYST
+    #elif TARGET_OS_IPHONE
+        // iOS, tvOS, or watchOS device
+        #define PLATFORM_IPHONE
+    #elif TARGET_OS_MAC
+        // Other kinds of Apple platforms
+        #define PLATFORM_MAC
+    #else
+    #   error "Unknown Apple platform"
+    #endif
+#elif __ANDROID__
+    #define PLATFORM_ANDROID
+#elif __linux__
+    #define PLATFORM_LINUX
+#elif __unix__ // all unices not caught above
+    #define PLATFORM_UNIX
+#elif defined(_POSIX_VERSION)
+    #define PLATFORM_POSIX
+#else
+#   error "Unknown compiler"
+#endif
+
+#endif // CYTOPLASM_PLATFORM_H

src/Util.c

@@ -24,6 +24,7 @@
 #include <Util.h>
 
 #include <Memory.h>
+#include <Platform.h>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -89,6 +90,10 @@ UtilTsMillis(void)
     return ts;
 }
 
+#ifdef PLATFORM_DARWIN
+#define st_mtim st_mtimespec
+#endif
+
 uint64_t
 UtilLastModified(char *path)
 {
@@ -105,6 +110,10 @@ UtilLastModified(char *path)
     return ts;
 }
 
+#ifdef PLATFORM_DARWIN
+#undef st_mtim
+#endif
+
 int
 UtilMkdir(const char *dir, const mode_t mode)
 {