1 files changed, 7 insertions, 0 deletions
diff --git a/automake.in b/automake.in
index 722a2026d..53bed2f1f 100644
--- a/automake.in
+++ b/automake.in
@@ -1235,6 +1235,13 @@ sub define_verbose_libtool ()
 sub handle_silent ()
 {
     return unless option 'silent-rules';
+    # Define "$(AM_V_P)", expanding to a shell conditional that can be
+    # used in make recipes to determine whether we are being run in
+    # silent mode or not.  The choice of the name derives from the LISP
+    # convention of appending the letter 'P' to denote a predicate (see
+    # also "the '-P' convention" in the Jargon File); we do so for lack
+    # of a better convention.
+    define_verbose_var ('P', 'false', ':');
     # *Always* provide the user with 'AM_V_GEN' for 'silent-rules' mode.
     define_verbose_tagvar ('GEN');
     define_verbose_var ('at', '@');