decouple internal.h headers

Saves comitters' daily life by avoid #include-ing everything from
internal.h to make each file do so instead.  This would significantly
speed up incremental builds.

We take the following inclusion order in this changeset:

1.  "ruby/config.h", where _GNU_SOURCE is defined (must be the very
    first thing among everything).
2.  RUBY_EXTCONF_H if any.
3.  Standard C headers, sorted alphabetically.
4.  Other system headers, maybe guarded by #ifdef
5.  Everything else, sorted alphabetically.

Exceptions are those win32-related headers, which tend not be self-
containing (headers have inclusion order dependencies).

1 files changed, 21 insertions, 23 deletions

diff --git a/signal.c b/signal.c
index 68d68c54bf..ab4eadc7ee 100644
--- a/signal.c
+++ b/signal.c
@@ -11,36 +11,39 @@
 
 **********************************************************************/
 
-#include "internal.h"
-#include "vm_core.h"
+#include "ruby/config.h"
+
+#include <errno.h>
 #include <signal.h>
 #include <stdio.h>
-#include <errno.h>
-#include "ruby_atomic.h"
-#include "eval_intern.h"
+
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
 #endif
+
 #ifdef HAVE_SYS_UIO_H
-#include <sys/uio.h>
+# include <sys/uio.h>
 #endif
+
 #ifdef HAVE_UCONTEXT_H
-#include <ucontext.h>
+# include <ucontext.h>
 #endif
 
-#ifdef HAVE_VALGRIND_MEMCHECK_H
-# include <valgrind/memcheck.h>
-# ifndef VALGRIND_MAKE_MEM_DEFINED
-#  define VALGRIND_MAKE_MEM_DEFINED(p, n) VALGRIND_MAKE_READABLE((p), (n))
-# endif
-# ifndef VALGRIND_MAKE_MEM_UNDEFINED
-#  define VALGRIND_MAKE_MEM_UNDEFINED(p, n) VALGRIND_MAKE_WRITABLE((p), (n))
-# endif
-#else
-# define VALGRIND_MAKE_MEM_DEFINED(p, n) 0
-# define VALGRIND_MAKE_MEM_UNDEFINED(p, n) 0
+#if HAVE_PTHREAD_H
+# include <pthread.h>
 #endif
 
+#include "debug_counter.h"
+#include "eval_intern.h"
+#include "internal.h"
+#include "internal/eval.h"
+#include "internal/sanitizers.h"
+#include "internal/signal.h"
+#include "internal/string.h"
+#include "internal/thread.h"
+#include "ruby_atomic.h"
+#include "vm_core.h"
+
 #ifdef NEED_RUBY_ATOMIC_OPS
 rb_atomic_t
 ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val)
@@ -395,7 +398,6 @@ interrupt_init(int argc, VALUE *argv, VALUE self)
     return rb_call_super(2, args);
 }
 
-#include "debug_counter.h"
 void rb_malloc_info_show_results(void); /* gc.c */
 
 void
@@ -728,10 +730,6 @@ rb_signal_buff_size(void)
     return signal_buff.size;
 }
 
-#if HAVE_PTHREAD_H
-#include <pthread.h>
-#endif
-
 static void
 rb_disable_interrupt(void)
 {