4 files changed, 17 insertions, 4 deletions
diff --git a/ChangeLog b/ChangeLog
index 33c8665076..8b05ddcb11 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jun 16 22:23:00 2009  Nobuyoshi Nakada  <[email protected]>
+
+	* io.c (rb_io_open), math.c (domain_check), object.c (boot_defclass):
+	  constified.
+
 Tue Jun 16 09:11:36 2009  Yukihiro Matsumoto  <[email protected]>
 
 	* io.c (argf_close): always call #close method.  [ruby-core:23853]
diff --git a/io.c b/io.c
index 708a676126..d59fbc5472 100644
--- a/io.c
+++ b/io.c
@@ -3092,8 +3092,10 @@ pipe_del_fptr(fptr)
     }
 }
 
+static void pipe_atexit _((void));
+
 static void
-pipe_atexit _((void))
+pipe_atexit()
 {
     struct pipe_list *list = pipe_list;
     struct pipe_list *tmp;
@@ -3606,9 +3608,11 @@ rb_f_open(argc, argv)
     return rb_io_s_open(argc, argv, rb_cFile);
 }
 
+static VALUE rb_io_open _((const char *fname, const char *mode));
+
 static VALUE
 rb_io_open(fname, mode)
-    char *fname, *mode;
+    const char *fname, *mode;
 {
     if (fname[0] == '|') {
 	return pipe_open(0, fname+1, mode);
diff --git a/math.c b/math.c
index bf9b598156..9a6d459797 100644
--- a/math.c
+++ b/math.c
@@ -22,10 +22,12 @@ VALUE rb_mMath;
     Need_Float(y);\
 } while (0)
 
+static void domain_check _((double x, const char *msg));
+
 static void
 domain_check(x, msg)
     double x;
-    char *msg;
+    const char *msg;
 {
     while(1) {
 	if (errno) {
diff --git a/object.c b/object.c
index 564d907739..d053c2fe39 100644
--- a/object.c
+++ b/object.c
@@ -2614,9 +2614,11 @@ rb_f_array(obj, arg)
     return rb_Array(arg);
 }
 
+static VALUE boot_defclass _((const char *name, VALUE super));
+
 static VALUE
 boot_defclass(name, super)
-    char *name;
+    const char *name;
     VALUE super;
 {
     extern st_table *rb_class_tbl;