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, 26 insertions, 12 deletions

diff --git a/compile.c b/compile.c
index 7043ba9a73..200670f826 100644
--- a/compile.c
+++ b/compile.c
@@ -9,25 +9,39 @@
 
 **********************************************************************/
 
-#include "ruby/encoding.h"
-#include "ruby/re.h"
-#include "ruby/util.h"
-#include "internal.h"
-#include "encindex.h"
+#include "ruby/config.h"
 #include <math.h>
 
+#ifdef HAVE_DLADDR
+# include <dlfcn.h>
+#endif
+
+#include "encindex.h"
+#include "gc.h"
+#include "id_table.h"
+#include "internal.h"
+#include "internal/array.h"
+#include "internal/compile.h"
+#include "internal/complex.h"
+#include "internal/debug.h"
+#include "internal/encoding.h"
+#include "internal/error.h"
+#include "internal/hash.h"
+#include "internal/numeric.h"
+#include "internal/object.h"
+#include "internal/re.h"
+#include "internal/symbol.h"
+#include "internal/thread.h"
+#include "internal/variable.h"
+#include "iseq.h"
+#include "ruby/re.h"
+#include "ruby/util.h"
 #include "vm_core.h"
 #include "vm_debug.h"
+
 #include "builtin.h"
-#include "iseq.h"
 #include "insns.inc"
 #include "insns_info.inc"
-#include "id_table.h"
-#include "gc.h"
-
-#ifdef HAVE_DLADDR
-# include <dlfcn.h>
-#endif
 
 #undef RUBY_UNTYPED_DATA_WARNING
 #define RUBY_UNTYPED_DATA_WARNING 0