verify sys_select header includes

src/header/sys_select/cbindgen.toml

@@ -1,5 +1,16 @@
-sys_includes = ["time.h", "signal.h"]
+# POSIX header spec: https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_select.h.html
+#
+# Spec quotations relating to includes:
+# - "The <sys/select.h> header shall define the time_t and suseconds_t types as described in <sys/types.h>."
+# - "The <sys/select.h> header shall define the sigset_t type as described in <signal.h>."
+# - "The <sys/select.h> header shall define the timespec structure as described in <time.h>."
+# - "Inclusion of the <sys/select.h> header may make visible all symbols from the headers <signal.h> and <time.h>."
+sys_includes = ["sys/types.h"]
+include_guard = "_RELIBC_SYS_SELECT_H"
 after_includes = """
+#include <bits/sigset-t.h> // for sigset_t from signal.h
+#include <bits/timespec.h> // for timespec from time.h
+
 // from musl license MIT {
 #define FD_SETSIZE 1024
 
@@ -19,7 +30,6 @@ typedef struct {
 #endif
 // } from musl license MIT
 """
-include_guard = "_SYS_SELECT_H"
 language = "C"
 style = "Tag"
 no_includes = true
@@ -31,3 +41,6 @@ prefix_with_name = true
 [export]
 # fd_set is also defined in C (above) because cbindgen is incompatible with mem::size_of
 exclude = ["FD_SETSIZE", "fd_set"]
+
+[export.rename]
+"timespec" = "struct timespec"