[m-rev.] diff: have configure warn about installing broken grades

[Julien Fischer]

Estimated hours taken: 0.1
Branches: release

configure.in:
	Warn about attempting to install grades that might break the
	installation process, (e.g. hlc.agc and java.).

Julien.

Index: configure.in
===================================================================
RCS file: /home/mercury1/repository/mercury/configure.in,v
retrieving revision 1.449.2.4
diff -u -r1.449.2.4 configure.in
--- configure.in	28 Jun 2006 08:19:43 -0000	1.449.2.4
+++ configure.in	3 Jul 2006 08:00:06 -0000
@@ -2924,8 +2924,13 @@
 fi

 # Add `.agc' (--gc accurate) grades
-# Currently only hlc.agc is supported.
+# Currently only hlc.agc is supported (XXX and its broken at the moment.)
 if test "$enable_agc_grades" = yes; then
+    AC_MSG_WARN(
+[ Installing accurate garbage collection (.agc) grades.
+**** Accurate garbage collection is an experimental feature and is not
+**** supported in this release.  It may not work, or even compile, correctly.
+])
     LIBGRADES="$LIBGRADES hlc.agc"
 fi

@@ -3033,6 +3038,11 @@
 # add Java back-end grade, if Java is installed
 if test $mercury_cv_java = yes -a "$enable_java_grade" = yes
 then
+	AC_MSG_WARN(
+[ Installing Java grade.
+**** The Java grade is currently broken and is not supported in this release.
+**** It may not work, or even compile, correctly.
+])
 	LIBGRADES="$LIBGRADES java"
 fi

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