From ebea41b8d21457d435b8fd6ee6783e3dbf749cba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Wed, 23 Jan 2013 22:20:23 -0500
Subject: [PATCH] build-sys: add silent rule for m4 processing

Using custom prefixes makes the whole build process a bit more
readable.
---
 Makefile.am | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index cd4d879ce7f..abc3d55438d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -246,6 +246,12 @@ INSTALL_EXEC_HOOKS += \
 	install-directories-hook \
 	install-aliases-hook
 
+# ------------------------------------------------------------------------------
+
+AM_V_M4 = $(AM_V_M4_$(V))
+AM_V_M4_ = $(AM_V_M4_$(AM_DEFAULT_VERBOSITY))
+AM_V_M4_0 = @echo "  M4      " $@;
+
 # ------------------------------------------------------------------------------
 rootbin_PROGRAMS = \
 	systemctl \
@@ -3863,14 +3869,14 @@ src/%.c: src/%.gperf
 
 src/%: src/%.m4
 	$(AM_V_at)$(MKDIR_P) $(dir $@)
-	$(AM_V_GEN)$(M4) -P $(M4_DEFINES) < $< > $@
+	$(AM_V_M4)$(M4) -P $(M4_DEFINES) < $< > $@
 
 M4_PROCESS_SYSTEM = \
-	$(AM_V_GEN)$(MKDIR_P) $(dir $@) && \
+	$(AM_V_M4)$(MKDIR_P) $(dir $@) && \
 	$(M4) -P $(M4_DEFINES) -DFOR_SYSTEM=1 < $< > $@
 
 M4_PROCESS_USER = \
-	$(AM_V_GEN)$(MKDIR_P) $(dir $@) && \
+	$(AM_V_M4)$(MKDIR_P) $(dir $@) && \
 	$(M4) -P $(M4_DEFINES) -DFOR_USER=1 < $< > $@
 
 units/%: units/%.m4 Makefile