Re: fyi-ac-arg-var.patch

[Akim Demaille]

>>>>> "Alexandre" == Alexandre Oliva <address@hidden> writes:

>> I'm applying this change, but I'm waiting for you to agree/disagree
>> on the `make distclean' part of the message to update the doc.

Alexandre> Looks good to me.  But I don't see much change in terms of
Alexandre> distclean.  What do you mean?

I'm confused, I believe I answered, but didn't receive my answer :(

Anyway, I was referring to the fact that the message, originally, did
not mention `make distclean'.

This is the last part of it.  One thing less, good!

Index: ChangeLog
from  Akim Demaille  <address@hidden>

        * acgeneral.m4 (_AC_ARG_VAR_VALIDATE): Output error messages on
        stderr.
        * doc/autoconf.texi (AC_ARG_VAR): Update.

Index: acgeneral.m4
===================================================================
RCS file: /cvs/autoconf/acgeneral.m4,v
retrieving revision 1.737
diff -u -u -r1.737 acgeneral.m4
--- acgeneral.m4 2001/06/21 10:56:21 1.737
+++ acgeneral.m4 2001/06/23 13:04:19
@@ -1536,17 +1536,17 @@
   eval ac_new_val="\$ac_env_${ac_var}_value"
   case $ac_old_set,$ac_new_set in
     set,)
-      AS_MESSAGE([error: `$ac_var' was set to `$ac_old_val' in the previous 
run])
+      AS_MESSAGE([error: `$ac_var' was set to `$ac_old_val' in the previous 
run], 2)
       ac_cache_corrupted=: ;;
     ,set)
-      AS_MESSAGE([error: `$ac_var' was not set in the previous run])
+      AS_MESSAGE([error: `$ac_var' was not set in the previous run], 2)
       ac_cache_corrupted=: ;;
     ,);;
     *)
       if test "x$ac_old_val" != "x$ac_new_val"; then
-        AS_MESSAGE([error: `$ac_var' has changed since the previous run:])
-        AS_MESSAGE([  former value:  $ac_old_val])
-        AS_MESSAGE([  current value: $ac_new_val])
+        AS_MESSAGE([error: `$ac_var' has changed since the previous run:], 2)
+        AS_MESSAGE([  former value:  $ac_old_val], 2)
+        AS_MESSAGE([  current value: $ac_new_val], 2)
         ac_cache_corrupted=:
       fi;;
   esac
@@ -1566,7 +1566,7 @@
   fi
 done
 if $ac_cache_corrupted; then
-  AS_MESSAGE([error: changes in the environment can compromise the build])
+  AS_MESSAGE([error: changes in the environment can compromise the build], 2)
   AS_ERROR([run `make distclean' and/or `rm $cache_file' and start over])
 fi
 ])# _AC_ARG_VAR_VALIDATE
Index: doc/autoconf.texi
===================================================================
RCS file: /cvs/autoconf/doc/autoconf.texi,v
retrieving revision 1.474
diff -u -u -r1.474 autoconf.texi
--- doc/autoconf.texi 2001/06/21 09:18:16 1.474
+++ doc/autoconf.texi 2001/06/23 13:04:37
@@ -5525,23 +5525,16 @@
 @example
 $ ./configure --silent --config-cache
 $ CC=cc ./configure --silent --config-cache
-configure: WARNING: `CC' was not set in the previous run
-configure: WARNING: changes in the environment can compromise
-configure: WARNING: the build. consider removing config.cache
-configure: WARNING: and starting over
-$ CC=gcc ./configure --config-cache --silent
-configure: WARNING: `CC' has changed since the previous run:
-configure: WARNING:   former value:  cc
-configure: WARNING:   current value: gcc
-configure: WARNING: changes in the environment can compromise
-configure: WARNING: the build. consider removing config.cache
-configure: WARNING: and starting over
-$ ./configure --silent --config-cache
-configure: WARNING: `CC' was set to `gcc' in the previous run
-configure: WARNING: changes in the environment can compromise
-configure: WARNING: the build. consider removing config.cache
-configure: WARNING: and starting over
+configure: error: `CC' was not set in the previous run
+configure: error: changes in the environment can compromise \
+the build
+configure: error: run `make distclean' and/or \
+`rm config.cache' and start over
 @end example
+
address@hidden
+and similarly if the variable is unset, or if its content is changed.
+
 
 @item
 @var{variable} is kept during automatic reconfiguration