start the C header removal process

fns.h

@@ -0,0 +1,12 @@
+// <signal.h>
+/*
+void sigaction();
+void sigemptyset();
+
+// <string.h>
+void* memcpy();
+void* memmove();
+void* memset();
+unsigned long strlen(const char*);
+char* strerror(int);
+*/

vlib/compiler/cheaders.v

@@ -6,6 +6,7 @@ CommonCHeaders = '
 
 #include <stdio.h>  // TODO remove all these includes, define all function signatures and types manually
 #include <stdlib.h>
+//#include "fns.h"
 #include <signal.h>
 #include <stdarg.h> // for va_list
 #include <inttypes.h>  // int64_t etc

vlib/os/os.v

@@ -7,7 +7,7 @@ module os
 import filepath
 
 #include <sys/stat.h>
-#include <signal.h>
+//#include <signal.h>
 #include <errno.h>
 
 /*