Fix various issues with Windows build

src/system4.c

@@ -21,7 +21,6 @@
 #include <dirent.h>
 #include <ctype.h>
 #include <signal.h>
-#include <sys/wait.h>
 #include <getopt.h>
 #include "debugger.h"
 #include "file.h"
@@ -206,10 +205,14 @@ static void config_init(void)
 	mkdir_p(new_save_dir);
 }
 
+
+#if (!defined(_WIN32) && !defined(__WIN32__))
+#include <sys/wait.h>
 void cleanup(possibly_unused int signal)
 {
 	while (waitpid((pid_t)-1, 0, WNOHANG) > 0);
 }
+#endif
 
 static void ain_audit(FILE *f, struct ain *ain)
 {
@@ -320,7 +323,9 @@ int main(int argc, char *argv[])
 		ERROR("Not an AIN/INI file: %s", &argv[0][len - 4]);
 	}
 
+#if (!defined(_WIN32) && !defined(__WIN32__))
 	signal(SIGCHLD, cleanup);
+#endif
 
 	config_init();
 

src/tools/fnl/fnldump.c

@@ -108,13 +108,13 @@ int main(int argc, char *argv[])
 
 	struct fnl *fnl = fnl_open(argv[0]);
 	for (size_t font = 0; font < fnl->nr_fonts; font++) {
-		NOTICE("FONT %zu", font);
+		NOTICE("FONT %u", (unsigned)font);
 		for (size_t face = 0; face < fnl->fonts[font].nr_faces; face++) {
 			struct fnl_font_face *font_face = &fnl->fonts[font].faces[face];
 			NOTICE("\tsize %lu (%lu glyphs)", font_face->height, font_face->nr_glyphs);
 
 			// create subdir
-			sprintf(path, "%s/font_%zu/face_%zu", output_dir, font, face);
+			sprintf(path, "%s/font_%u/face_%u", output_dir, (unsigned)font, (unsigned)face);
 			mkdir_p(path);
 
 			// extract glyphs
@@ -123,7 +123,7 @@ int main(int argc, char *argv[])
 				if (!glyph->data)
 					continue;
 
-				sprintf(path, "%s/font_%zu/face_%zu/glyph_%zu.webp", output_dir, font, face, g);
+				sprintf(path, "%s/font_%u/face_%u/glyph_%u.webp", output_dir, (unsigned)font, (unsigned)face, (unsigned)g);
 				FILE *f = fopen(path, "wb");
 				if (!f) {
 					ERROR("fopen failed: %s", strerror(errno));

src/vm.c

@@ -21,7 +21,6 @@
 #include <math.h>
 #include <time.h>
 #include <errno.h>
-#include <spawn.h>
 #include <SDL.h> // for system.MsgBox
 
 #include "debugger.h"
@@ -37,6 +36,10 @@
 #include "vm/heap.h"
 #include "vm/page.h"
 
+#if (!defined(_WIN32) && !defined(__WIN32__))
+#include <spawn.h>
+#endif
+
 extern char **environ;
 
 static inline int32_t lint_clamp(int64_t n)
@@ -430,6 +433,9 @@ static void system_call(enum syscall_code code)
 		break;
 	}
 	case SYS_OPEN_WEB: {
+#if (defined(_WIN32) || defined(__WIN32__))
+		WARNING("system.OpenWeb not implemented on Windows");
+#else
 		struct string *url = stack_peek_string(0);
 		char *browser = getenv("BROWSER");
 		if (!browser || !*browser) {
@@ -442,6 +448,7 @@ static void system_call(enum syscall_code code)
 		if ((err = posix_spawnp(&child, browser, NULL, NULL, argv, environ))) {
 			WARNING("posix_spawn failed: %s", strerror(err));
 		}
+#endif
 		heap_unref(stack_pop().i);
 		break;
 	};