--- make.conf	2006-03-19 18:40:11.000000000 +0100
+++ make.conf.sh	2006-03-19 18:26:21.000000000 +0100
@@ -23,6 +23,19 @@
 # Example:
 #USE="X gtk gnome -alsa"
 
+# Host Setting
+# ============
+#
+# DO NOT CHANGE THIS SETTING UNLESS YOU ARE USING STAGE1!
+# It's very important you select the right CHOST from the start.  A wrong
+# CHOST could easily lead to weird errors either in compiling or running.
+#
+# There are really only two choices right now:
+#   sh3-unknown-linux-gnu
+#   sh4-unknown-linux-gnu    (Dreamcast / LANTank)
+#
+CHOST="sh4-unknown-linux-gnu"
+
 # Host and optimization settings 
 # ==============================
 #
@@ -33,10 +46,17 @@
 # package (and in some cases the libraries it uses) at default optimizations
 # before reporting errors to developers.
 #
-# Please refer to the GCC manual for a list of possible values.
-#
-#CFLAGS="-O2 -pipe"
+# -m# optimize code for the particular type of CPU.  The number should match
+# your CHOST so if you are using "sh4-unknown-linux-gnu", you should have
+# -m4 below.
 #
+# Don't use -O3.  Even -O2 may be risky in some cases.
+#
+# For a full listing of supported CPU models, please refer to the GCC website:
+# http://gcc.gnu.org/onlinedocs/gcc-3.3/gcc/SH-Options.html
+#
+#CFLAGS="-m4 -O2 -pipe"
+
 # If you set a CFLAGS above, then this line will set your default C++ flags to
 # the same settings.
 #CXXFLAGS="${CFLAGS}"