add comments to AC_DEFINE... definitions for autoconf 2.5

configure.in

@@ -33,7 +33,7 @@ AC_MSG_CHECKING(whether to enable debugging)
 AC_ARG_ENABLE(debug,
   [  --enable-debug          show debug information],
   if [[[ "$enableval" = "yes" ]]]; then
-        AC_DEFINE(DEBUG)
+        AC_DEFINE(DEBUG,[1],[Define to 1 to show debug information])
         debug="yes"
   else
         debug="no"
@@ -161,12 +161,12 @@ AC_GET_FS_INFO
 
 AC_ARG_ENABLE(stat-nfs,
   [  --enable-stat-nfs       display filesystem stats for NFS],
-  AC_DEFINE(STAT_NFS)
+  AC_DEFINE(STAT_NFS,[1],[Define to 1 to display filesystem stats for NFS])
 )
 
 AC_ARG_ENABLE(stat-smbfs,
   [  --enable-stat-smbfs     display filesystem stats for SMBFS],
-  AC_DEFINE(STAT_SMBFS)
+  AC_DEFINE(STAT_SMBFS,[1],[iDefine to 1 to display filesystem stats for SMBFS])
 )
 
 
@@ -175,11 +175,11 @@ AC_ARG_WITH(lcdport,
   LCDPORT=$withval,
   LCDPORT="13666"
 )
-AC_DEFINE_UNQUOTED(LCDPORT, $LCDPORT)
+AC_DEFINE_UNQUOTED(LCDPORT, $LCDPORT, [Set default port where LCDd should listen])
 
-AC_DEFINE_UNQUOTED(PROTOCOL_VERSION, "0.3")
+AC_DEFINE_UNQUOTED(PROTOCOL_VERSION, "0.3", [Define version of lcdproc client-server protocol])
 
-AC_DEFINE_UNQUOTED(API_VERSION, "0.5")
+AC_DEFINE_UNQUOTED(API_VERSION, "0.5", [Define version of lcdproc API])
 
 
 AC_ARG_WITH(loadmax,
@@ -188,7 +188,7 @@ AC_ARG_WITH(loadmax,
   LOAD_MAX=$withval,
   LOAD_MAX=1.3
 )
-AC_DEFINE_UNQUOTED(LOAD_MAX, $LOAD_MAX)
+AC_DEFINE_UNQUOTED(LOAD_MAX, $LOAD_MAX, [Define max Load Avg at which the backlight will start blinking])
 
 AC_ARG_WITH(loadmin,
   [  --with-loadmin=<load>   Min Load Avg at which the backlight will]
@@ -196,7 +196,7 @@ AC_ARG_WITH(loadmin,
   LOAD_MIN=$withval,
   LOAD_MIN=0.05
 )
-AC_DEFINE_UNQUOTED(LOAD_MIN, $LOAD_MIN)
+AC_DEFINE_UNQUOTED(LOAD_MIN, $LOAD_MIN, [Define min Load Avg at which the backlight will turn off])
 
 AC_MODULES_INFO