* README, README.ja: Add a note about default C flags.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@16725 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sat May 31 23:33:34 2008  Akinori MUSHA  <knu@iDaemons.org>
+
+	* README, README.ja: Add a note about default C flags.
+
 Sat May 31 23:02:00 2008  Tanaka Akira  <akr@fsij.org>
 
 	* gc.c (count_objects): clear given hash.

README

@@ -65,6 +65,10 @@ This is what you need to do to compile and install Ruby:
 
   2. Run ./configure, which will generate config.h and Makefile.
 
+     Some C compiler flags may be added by default depending on your
+     environment.  Specify optflags=.. and warnflags=.. as necessary
+     to override them.
+
   3. Edit defines.h if you need.  Usually this step will not be needed.
 
   4. Remove comment mark(#) before the module names from ext/Setup (or

README.ja

@@ -88,6 +88,10 @@ Ruby
 
   2. configureを実行してMakefileなどを生成する
 
+     環境によってはデフォルトのCコンパイラ用オプションが付き
+     ます．configureオプションで optflags=.. warnflags=.. 等
+     で上書きできます．
+
   3. (必要ならば)defines.hを編集する
 
      多分，必要無いと思います．