diff --git a/.gitignore b/.gitignore
index b83b959..6f4411e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,3 +34,4 @@ full-package-name-VERSION/
 *-coverage/
 *.gcda
 *.gcno
+libtool
diff --git a/Makefile.am b/Makefile.am
index ffb67fe..f7141a7 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,24 +1,22 @@
 AM_CFLAGS = # CFLAGS applicable to all executables (products)
 AM_CPPFLAGS = -I$(top_srcdir)/src # so that tests also find header files
+ACLOCAL_AMFLAGS = -I m4
 
-# Convenience library so that it can be resued
-# between my_executable and the tests
-noinst_LIBRARIES = libcommon.a
-libcommon_a_SOURCES = src/common.h src/common.c
-# src/common.h appear in SOURCES to that it gets copied to
-# distribution tgz.
+# libtool library definition
+lib_LTLIBRARIES = libtest.la
+libtest_la_SOURCES = src/test.h src/test.c
+libtest_la_LDFLAGS = -version-info 0:0:0
 
-# The main product
-bin_PROGRAMS = myexecutable # make all will generate ./my_executable
+bin_PROGRAMS = main_executable
 
 #include .c and .h in SOURCES so that both appear in dist
-myexecutable_SOURCES = \
+main_executable_SOURCES = \
 											 src/add.c \
 											 src/add.h \
                        src/main.c
-myexecutable_CFLAGS = $(AM_CFLAGS) $(CODE_COVERAGE_CFLAGS) #--std=c11 # CFLAGS applicable to myexecutable_SOURCES
-myexecutable_LDADD = libcommon.a
-myexecutable_LDFLAGS = $(CODE_COVERAGE_LDFLAGS)
+main_executable_CFLAGS = $(AM_CFLAGS) $(CODE_COVERAGE_CFLAGS) #--std=c11 # CFLAGS applicable to myexecutable_SOURCES
+main_executable_LDADD = libtest.la
+main_executable_LDFLAGS = $(CODE_COVERAGE_LDFLAGS)
 # myexecutable_CFLAGS = $(CODE_COVERAGE_CFLAGS)
 
 
diff --git a/autogen.sh b/autogen.sh
index 7dfab98..7afd3c2 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -6,5 +6,5 @@
 # autoreconf runs all the autotool configuration tools in the right order
 # and will avoid regenerating files. 
 # 
-autoreconf --install --make # install missing files
+autoreconf --install
 # automake --add-missing --copy >/dev/null 2>&1 # add install-sh 
diff --git a/configure.ac b/configure.ac
index ab9b816..87be282 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,81 +1,39 @@
-#                                               -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
-
 AC_PREREQ([2.69])
-AC_INIT([FULL-PACKAGE-NAME], [VERSION], [BUG-REPORT-ADDRESS])
+AC_INIT([test_automake_shared], [0.9.1], [https://github.com/valicek1])
 AC_CONFIG_AUX_DIR([build-aux])
 AM_INIT_AUTOMAKE([foreign subdir-objects]) # Does not require NEWS, COPYING, AUTHORS, ChangeLog or README
 
-# silent make https://autotools.io/automake/silent.html
-# silent rules enabled by default with 'yes'
-# disable silent runles with ./configure --disable-silent-rules
-AM_SILENT_RULES([yes]) # less verbose make output 
-# AM_SILENT_RULES() # use make -s to get silent output
+AM_SILENT_RULES([yes]) # silent rules, for make -s use just [] as arg
 
-AC_CONFIG_SRCDIR([src/main.c])
+AC_CONFIG_SRCDIR([src/main.c]) # main src dir
 AC_CONFIG_HEADERS([config.h]) # use config.h instead of passing -D in the command line
 AC_CONFIG_MACRO_DIR([m4])
 
-AC_LANG([C]) # Use C not C++
+AC_LANG([C]) # use C
 
-# Checks for programs.
-AC_PROG_CC
-
-# In case that you want to check for specific versions of gcc 
-# For example in case that you need C11 support you want to 
-# check for gcc-4.9 
-#AC_PROG_CC([gcc-4.9 gcc cc])
-
-AC_PROG_CC_C99 # or AC_PROG_CC_89 to force C89 mode or AC_PROG_CC_STDC to go to latest supported standard (currently C99)
+AC_PROG_CC		# Checks for programs
+AC_PROG_CC_C99	# C99 standard
 
 AC_PROG_INSTALL
-AC_PROG_CC_C_O # Need to have per product flags myexecutable_CFLAG
-AC_PROG_RANLIB # Need for to create libraries: .a 
-
-
-# Checks for libraries.
-
-# Found libraries are automatically addded to LIBS
-# AC_SEARCH_LIBS([pthread_cond_wait], [pthread],[],[
-#                 AC_MSG_ERROR([You need to install pthreads library.])
-#                 ])
-
-# AC_SEARCH_LIBS([g_test_init], [glib-2.0],[],[
-#                 AC_MSG_ERROR([You need to install glib-2.0 library.])
-#                 ])
+AC_PROG_CC_C_O	# Need to have per product flags myexecutable_CFLAG
+AC_PROG_LIBTOOL	# libtool  init
 
 # Checks for header files.
 AC_HEADER_ASSERT # ./configure --disable-assert to define NDEBUG 
 AC_CHECK_HEADER([stdlib.h])
 
-# Check for C11's optional Atomic operations library 
-# AC_CHECK_HEADER([stdatomic.h], [], [
-#                 AC_MSG_ERROR([C11 with atomic support needed.])
-#                  ])
+AC_ARG_ENABLE([myerror], 
+              AS_HELP_STRING([--enable-myerror],[enable error]),
+              [enable_myerror=yes],[enable_myerror=${enableval}])
 
-# Checks for typedefs, structures, and compiler characteristics.
-
-# Checks for library functions.
-
-# The following statement will use pkg-config --cflags --libs 
-# to find out CFLAGS and -l options required to build a target that 
-# it's going to link against glib2.0.
-# The required CFLAGS and -l options are available as DEPS_CFLAGS
-# and DEPS_LIBS in Makefile.am
-# PKG_CHECK_MODULES([DEPS], [glib-2.0 >= 2.24.1]) 
-
-AC_ARG_ENABLE([myfeature], 
-              AS_HELP_STRING([--disable-myfeature],[disable myfeature to get remove support for this and that]),
-              [enable_myfeature=${enableval}],[enable_myfeature=yes])
-
-if test "x${enable_myfeature}" == "xyes"; then
-  AC_DEFINE([MYFEATURE], 1, [myfeature is enabled])
-else
+if test "x${enable_myerror}" == "xyes"; then
+  AC_DEFINE([MYERROR], 1, [myerroris enabled])
   AC_MSG_WARN([
 -----------------------------------------------------------------------------------
-Are you sure that you want to have myfeature disabled? You will lose this and that.
+                               Results won't be real!
 -----------------------------------------------------------------------------------
                ])
+
 fi
 
 AC_CONFIG_FILES([Makefile])
diff --git a/src/main.c b/src/main.c
index f29a077..a5112cb 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,7 +3,7 @@
 #endif
 
 #include <stdio.h>
-#include "common.h"
+#include "test.h"
 #include <assert.h>
 
 int main(int argc, char *argv[])
diff --git a/src/common.c b/src/test.c
similarity index 77%
rename from src/common.c
rename to src/test.c
index cc19901..f345fc3 100644
--- a/src/common.c
+++ b/src/test.c
@@ -1,5 +1,5 @@
 #include <stdio.h>
-#include "common.h"
+#include "test.h"
 void myfunc()
 {
   printf("myfunc() called\n");
diff --git a/src/common.h b/src/test.h
similarity index 54%
rename from src/common.h
rename to src/test.h
index 5aa5c82..4e63e39 100644
--- a/src/common.h
+++ b/src/test.h
@@ -1,9 +1,9 @@
-#ifndef COMMON_H
-#define COMMON_H
+#ifndef TEST_H
+#define TEST_H
 
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
 void myfunc();
 
-#endif /* COMMON_H */
+#endif /* TEST_H */