news: update w.r.t. recent vala changes

* NEWS: Here.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

diff --git a/NEWS b/NEWS
index 1c8c401..6377234 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -61,6 +61,30 @@ New in 1.12.5:
     giving more useful warnings than a bare "command not found" from a
     make recipe would.
 
+* Vala support:
+
+  - The AM_PROG_VALAC macro has been enhanced to takes two further
+    optional arguments; it's signature now being
+
+        AM_PROG_VALAC([MINIMUM-VERSION], [ACTION-IF-FOUND],
+                      [ACTION-IF-NOT-FOUND])
+
+  - By default, AM_PROG_VALAC no longer aborts the configure invocation
+    if the Vala compiler found is too old, but simply prints a warning
+    messages (as it did when the Vala compiler was not found).  This
+    should avoid unnecessary difficulties for end users that just want
+    to compile the unmodified, distributed Vala-generated C sources,
+    but happens to have an old Vala compiler in their PATH.  This fixes
+    automake bug#12688.
+
+  - If no proper Vala compiler is found at configure runtime, AM_PROG_VALAC
+    will set the AC_SUBST'd variable 'VALAC' to 'valac' rather than to ':'.
+    This is a better default, because with it a triggered makefile rule
+    invoking a Vala compilation will clearly fail with an informative error
+    message like "valac: command not found", rather than silently, with
+    the error possibly going unnoticed or triggering harder-to-diagnose
+    fallout failures in later steps.
+
 Bugs fixed in 1.12.5:
 
 * Long-standing bugs: