From fed9a8415fc77ed42bf9a94ea421eff4f62c5eb4 Mon Sep 17 00:00:00 2001
From: Anthony Ramine <n.oxyde@gmail.com>
Date: Wed, 28 Nov 2012 11:45:47 +0100
Subject: Implement ./otp_build configure --enable-silent-rules

With silent rules, the output of make is less verbose and compilation
warnings are easier to spot. Silent rules are disabled by default and
can be disabled or enabled at will by make V=0 and make V=1.
---
 configure.in | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'configure.in')

diff --git a/configure.in b/configure.in
index e906c17ecc..c0994245e8 100644
--- a/configure.in
+++ b/configure.in
@@ -354,6 +354,21 @@ elif test X"$TMPSYS" '=' X"Darwin-i386"; then
 	export LDFLAGS
 fi
 
+AC_ARG_ENABLE([silent-rules], [dnl
+AS_HELP_STRING(
+  [--enable-silent-rules],
+  [less verbose build output (undo: "make V=1")])
+AS_HELP_STRING(
+  [--disable-silent-rules],
+  [verbose build output (undo: "make V=0")])dnl
+])
+
+DEFAULT_VERBOSITY=1
+if test X${enable_silent_rules} = Xyes; then
+  DEFAULT_VERBOSITY=0
+fi
+AC_SUBST(DEFAULT_VERBOSITY)
+
 if test X${enable_m64_build} = Xyes; then
 	enable_hipe=no
 	CFLAGS="-m64 $CFLAGS"
@@ -378,7 +393,7 @@ AC_SUBST(NATIVE_LIBS_ENABLED)
 export ERL_TOP
 AC_CONFIG_SUBDIRS(lib erts)
 
-AC_CONFIG_FILES([Makefile])
+AC_CONFIG_FILES([Makefile make/output.mk])
 AC_CONFIG_FILES([make/emd2exml], [chmod +x make/emd2exml])
 
 AC_OUTPUT
-- 
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