diff --git a/Makefile.am b/Makefile.am
index df61214..3c50467 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,7 +19,7 @@
 ######################################################################
 SUBDIRS=src test doc
 
-EXTRA_DIST=doc
+EXTRA_DIST=doc default_commit_hash
 
 dist-hook:
 	rm -rf `find $(distdir)/doc -type d -name .svn`
diff --git a/autogen.sh b/autogen.sh
index b1e9c84..ae16921 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -19,6 +19,28 @@
 # 
 #  See the file ChangeLog for a revision history. 
 
+echo "--- Make commit hash file -------"
+
+SHORTHASH="unknown"
+type git > /dev/null 2>&1
+if [ $? -eq 0 -a -d .git ]; then
+	RESULT=`git rev-parse --short HEAD`
+	if [ $? -eq 0 ]; then
+		SHORTHASH=${RESULT}
+	fi
+fi
+echo ${SHORTHASH} > default_commit_hash
+
+echo "--- Finished commit hash file ---"
+
+echo "--- Start autotools -------------"
+
 aclocal \
+&& autoheader \
 && automake --add-missing \
 && autoconf
+
+echo "--- Finished autotools ----------"
+
+exit 0
+
diff --git a/configure.ac b/configure.ac
index 0ca026d..52673a4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,6 +21,7 @@ dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.59)
 AC_INIT(s3fs, 1.79)
+AC_CONFIG_HEADER([config.h])
 
 AC_CANONICAL_SYSTEM
 AM_INIT_AUTOMAKE([foreign])
@@ -30,6 +31,9 @@ AC_PROG_CC
 
 CXXFLAGS="$CXXFLAGS -Wall -D_FILE_OFFSET_BITS=64"
 
+dnl ----------------------------------------------
+dnl For OSX
+dnl ----------------------------------------------
 case "$target" in
    *-darwin* )
       # Do something specific for mac
@@ -219,12 +223,41 @@ AM_CONDITIONAL([USE_GNUTLS_NETTLE], [test "$auth_lib" = nettle])
 AM_CONDITIONAL([USE_SSL_NSS], [test "$auth_lib" = nss])
 
 dnl ----------------------------------------------
-dnl end of ssl library
+dnl check functions
 dnl ----------------------------------------------
-
 dnl malloc_trim function
-AC_CHECK_FUNCS(malloc_trim, , )
+#AC_CHECK_FUNCS(malloc_trim, , )
+AC_CHECK_FUNCS([malloc_trim])
 
+dnl ----------------------------------------------
+dnl output files
+dnl ----------------------------------------------
 AC_CONFIG_FILES(Makefile src/Makefile test/Makefile doc/Makefile)
+
+dnl ----------------------------------------------
+dnl short commit hash
+dnl ----------------------------------------------
+AC_CHECK_PROG([GITCMD], [git —version], [yes], [no])
+AC_CHECK_FILE([.git], [DOTGITDIR=yes], [DOTGITDIR=no])
+
+AC_MSG_CHECKING([github short commit hash])
+if test “x${GITCMD}” = “xyes” -a “x${DOTGITDIR}” = “xyes”; then
+    GITCOMMITHASH=`git rev-parse --short HEAD`
+elif test -f default_commit_hash; then
+    GITCOMMITHASH=`cat default_commit_hash`
+else
+    GITCOMMITHASH="unknown"
+fi
+AC_MSG_RESULT([${GITCOMMITHASH}])
+
+AC_DEFINE_UNQUOTED([COMMIT_HASH_VAL], ["${GITCOMMITHASH}"], [short commit hash value on github])
+
+dnl ----------------------------------------------
+dnl put
+dnl ----------------------------------------------
 AC_OUTPUT
 
+dnl ----------------------------------------------
+dnl end configuration
+dnl ----------------------------------------------
+
diff --git a/src/Makefile.am b/src/Makefile.am
index f9edf84..5741f1b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -39,6 +39,6 @@ s3fs_LDADD = $(DEPS_LIBS)
 
 noinst_PROGRAMS = test_string_util
 
-test_string_util_SOURCES = string_util.cpp test_string_util.cpp
+test_string_util_SOURCES = string_util.cpp test_string_util.cpp test_util.h
 
 TESTS = test_string_util
diff --git a/src/common.h b/src/common.h
index 7dd0806..8de3bba 100644
--- a/src/common.h
+++ b/src/common.h
@@ -17,9 +17,12 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
+
 #ifndef S3FS_COMMON_H_
 #define S3FS_COMMON_H_
 
+#include "../config.h"
+
 //
 // Macro
 //
diff --git a/src/s3fs.cpp b/src/s3fs.cpp
index 92b6244..e503a51 100644
--- a/src/s3fs.cpp
+++ b/src/s3fs.cpp
@@ -3231,8 +3231,8 @@ static int s3fs_removexattr(const char* path, const char* name)
 
 static void* s3fs_init(struct fuse_conn_info* conn)
 {
-  FPRN("init");
-  LOWSYSLOGPRINT(LOG_ERR, "init v%s (%s)", VERSION, s3fs_crypt_lib_name());
+  FPRN("init v%s(commit:%s) with %s", VERSION, COMMIT_HASH_VAL, s3fs_crypt_lib_name());
+  LOWSYSLOGPRINT(LOG_ERR, "init v%s(commit:%s) with %s", VERSION, COMMIT_HASH_VAL, s3fs_crypt_lib_name());
 
   // ssl init
   if(!s3fs_init_global_ssl()){
diff --git a/src/s3fs_util.cpp b/src/s3fs_util.cpp
index cef0f63..82f05d2 100644
--- a/src/s3fs_util.cpp
+++ b/src/s3fs_util.cpp
@@ -1039,12 +1039,12 @@ void show_help (void)
 void show_version(void)
 {
   printf(
-  "Amazon Simple Storage Service File System V%s with %s\n"
+  "Amazon Simple Storage Service File System V%s(commit:%s) with %s\n"
   "Copyright (C) 2010 Randy Rizun <rrizun@gmail.com>\n"
   "License GPL2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>\n"
   "This is free software: you are free to change and redistribute it.\n"
   "There is NO WARRANTY, to the extent permitted by law.\n",
-  VERSION, s3fs_crypt_lib_name());
+  VERSION, COMMIT_HASH_VAL, s3fs_crypt_lib_name());
   return;
 }