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, 9 deletions

diff --git a/iseq.c b/iseq.c
index cbf62176bd..2f40efc77b 100644
--- a/iseq.c
+++ b/iseq.c
@@ -9,25 +9,37 @@
 
 **********************************************************************/
 
-#include "internal.h"
-#include "ruby/util.h"
-#include "eval_intern.h"
+#define RUBY_VM_INSNS_INFO 1
+/* #define RUBY_MARK_FREE_DEBUG 1 */
+
+#include "ruby/config.h"
 
 #ifdef HAVE_DLADDR
 # include <dlfcn.h>
 #endif
 
-#define RUBY_VM_INSNS_INFO 1
-/* #define RUBY_MARK_FREE_DEBUG 1 */
+#include "eval_intern.h"
 #include "gc.h"
-#include "vm_core.h"
-#include "iseq.h"
 #include "id_table.h"
-#include "builtin.h"
+#include "internal.h"
+#include "internal/bits.h"
+#include "internal/compile.h"
+#include "internal/error.h"
+#include "internal/file.h"
+#include "internal/hash.h"
+#include "internal/parse.h"
+#include "internal/sanitizers.h"
+#include "internal/symbol.h"
+#include "internal/thread.h"
+#include "internal/variable.h"
+#include "iseq.h"
+#include "mjit.h"
+#include "ruby/util.h"
+#include "vm_core.h"
 
+#include "builtin.h"
 #include "insns.inc"
 #include "insns_info.inc"
-#include "mjit.h"
 
 VALUE rb_cISeq;
 static VALUE iseqw_new(const rb_iseq_t *iseq);