[PATCH 2/5] Enable automake silent rules

[Antonio Ospite <ao2@xxxxxx>]

Enable automake silent rules to make it easier to spot compilation
problems.

Silent rules will be enabled by default, but only if they are available,
in order to keep compatibility with older autotools versions.

Prepend the silent strings also to custom rules.

Signed-off-by: Antonio Ospite <ao2@xxxxxx>
---
 configure.ac    |  2 ++
 src/Makefile.am | 16 ++++++++--------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/configure.ac b/configure.ac
index 594fb42..036730d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,6 +4,8 @@ AC_CONFIG_SRCDIR([src/main.c])
 
 AC_CONFIG_HEADERS(config.h)
 
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES(yes)])
+
 dnl Checks for programs.
 AC_PROG_CC
 AC_USE_SYSTEM_EXTENSIONS
diff --git a/src/Makefile.am b/src/Makefile.am
index 8b9eb8c..1732465 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -44,27 +44,27 @@ EXTRA_DIST = \
 	mknodes.c nodetypes nodes.c.pat mksyntax.c mksignames.c
 
 token.h token_vars.h: mktokens
-	$(SHELL) $^
+	$(AM_V_GEN)$(SHELL) $^
 
 builtins.def: builtins.def.in $(top_builddir)/config.h
-	$(COMPILE) -E -x c -o $@ $<
+	$(AM_V_CC)$(COMPILE) -E -x c -o $@ $<
 
 builtins.c builtins.h: mkbuiltins builtins.def
-	$(SHELL) $^
+	$(AM_V_GEN)$(SHELL) $^
 
 init.c: mkinit $(dash_CFILES)
-	./$^
+	$(AM_V_GEN)./$^
 
 nodes.c nodes.h: mknodes nodetypes nodes.c.pat
-	./$^
+	$(AM_V_GEN)./$^
 
 syntax.c syntax.h: mksyntax
-	./$^
+	$(AM_V_GEN)./$^
 
 signames.c: mksignames
-	./$^
+	$(AM_V_GEN)./$^
 
 mksyntax: token.h
 
 $(HELPERS): %: %.c
-	$(COMPILE_FOR_BUILD) -o $@ $<
+	$(AM_V_CC)$(COMPILE_FOR_BUILD) -o $@ $<
-- 
2.19.1