Add sys/select.h to sys/types.h

This was triggered by gcc for some reason It included sys/types.h and
assumed sys/select.h to be there. And that seams to be the case in musl.

The problem with relibc here is that sys/types.h is are part of relibc
"include/*.h" files, while sys/select.h is generated by cbindgen. That
makes it impossible to #include select.h in types.h epsecially that
there are files like fcntl.c that uses types.h. They would complain
about missing headers. I fixed this by renaming sys/types.h to
sys/types_internal.h and then generating types.h using cbindgen as well
except for that. however fcntl and dlmalloc can include types_internal
instead of types.h

include/sys/types.h → include/sys/types_internal.h

@@ -1,5 +1,5 @@
-#ifndef _SYS_TYPES_H
-#define _SYS_TYPES_H
+#ifndef _SYS_TYPES_INTERNAL_H
+#define _SYS_TYPES_INTERNAL_H
 #include <stddef.h>
 
 typedef long blksize_t;
@@ -31,5 +31,4 @@ typedef unsigned long u_long, ulong;
 typedef long long quad_t;
 typedef unsigned long long u_quad_t;
 typedef char *caddr_t;
-
-#endif /* _SYS_TYPES_H */
+#endif /* _SYS_TYPES_INTERNAL_H */

src/c/dlmalloc.c

@@ -613,7 +613,7 @@ void *memset(void *s, int c, size_t n);
 #endif  /* DARWIN */
 
 #ifndef LACKS_SYS_TYPES_H
-#include <sys/types.h>  /* For size_t */
+#include <sys/types_internal.h>  /* For size_t */
 #endif  /* LACKS_SYS_TYPES_H */
 
 /* The maximum possible size_t value has all bits set */

src/c/fcntl.c

@@ -1,5 +1,5 @@
 #include <stdarg.h>
-#include <sys/types.h>
+#include <sys/types_internal.h>
 
 // TODO: Can be implemented in rust when cbindgen supports "..." syntax
 

src/header/mod.rs

@@ -51,6 +51,7 @@ pub mod arch_aarch64_user;
 pub mod arch_x64_user;
 pub mod sys_procfs;
 pub mod sys_random;
+pub mod sys_types;
 pub mod sys_uio;
 pub mod sys_un;
 pub mod sys_utsname;

src/header/sys_types/cbindgen.toml

@@ -0,0 +1,7 @@
+sys_includes = ["stddef.h", "sys/types_internal.h", "sys/select.h"]
+include_guard = "_SYS_TYPES_H"
+language = "C"
+style = "Tag"
+
+[enum]
+prefix_with_name = true

src/header/sys_types/mod.rs

@@ -0,0 +1,2 @@
+//! sys/types.h
+use crate::platform::types::*;