automake: enable 'make V=0'

Enables silent mode for automake generated Makefiles,
and silent mode is _off_ by default. Using V=0 the output
is much easier to read when trying to find warnings:

nwatkins@piha:~/Projects/ceph/ceph$ make -j8 V=0
make[3]: Entering directory `/users/nwatkins/Projects/ceph/ceph/src'
  CC     locks.o
  CXX    journal.o
  CXX    Server.o
  CXX    Mutation.o
  CXX    MDCache.o
  CXX    Locker.o
  CXX    Migrator.o
  CXX    MDBalancer.o
  CXX    CDentry.o
  CXX    CDir.o
  CXX    CInode.o
  CXX    LogEvent.o
  CXX    MDSTable.o

Signed-off-by: Noah Watkins <noahwatkins@gmail.com>

diff --git a/configure.ac b/configure.ac
index 54582e9a6cb9cdc1eb9034027c99b6271e25b0e3..056f3b3863957a2b47ff80b1721cd36eced48137 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -20,6 +20,10 @@ AM_INIT_AUTOMAKE
 AM_PROG_CC_C_O
 AM_PROG_LIBTOOL
 
+# enable make V=0 (if automake >1.11)
+AM_INIT_AUTOMAKE([foreign])
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
 # Platform
 case "${target_os}" in
 darwin*)