diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..cd19b89
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,71 @@
+dnl =============================================================
+dnl Process this file with autoconf to produce a configure script
+dnl =============================================================
+AC_INIT([CTATools], [0.1], [knodlseder@cesr.fr])
+AC_CONFIG_SRCDIR(src/Makefile.am)
+AC_CONFIG_MACRO_DIR([m4])
+
+AM_INIT_AUTOMAKE([gnu no-dependencies])
+AM_CONFIG_HEADER([config.h])
+AM_MAINTAINER_MODE
+
+
+dnl ===========================
+dnl things required by automake
+dnl ===========================
+dnl AC_ARG_PROGRAM
+AC_PROG_MAKE_SET
+
+
+dnl ======================
+dnl Check for which system
+dnl ======================
+dnl AC_CANONICAL_HOST
+
+
+dnl ===================
+dnl Checks for programs
+dnl ===================
+AC_PROG_CXX
+AC_PROG_INSTALL
+dnl AC_PROG_RANLIB
+AC_PROG_LIBTOOL
+
+
+dnl =======================
+dnl Check compiler features
+dnl =======================
+dnl AC_TYPE_SIZE_T
+dnl AC_C_CONST
+dnl AC_C_VOLATILE
+dnl AC_C_INLINE
+
+
+dnl =======================
+dnl Checks for header files
+dnl =======================
+
+
+dnl =============================================================
+dnl Checks for typedefs, structures, and compiler characteristics
+dnl =============================================================
+
+
+dnl ============================
+dnl Checks for library functions
+dnl ============================
+
+
+dnl ===================
+dnl Checks for gammalib
+dnl ===================
+AC_SEARCH_LIBS(str, gammalib,
+    AC_DEFINE([G_GAMMALIB], [1], [Define if gammalib is available]), ,[-lm])
+
+
+dnl ======================================
+dnl Set list of output files to be creates
+dnl ======================================
+AC_OUTPUT([Makefile
+           src/Makefile
+           src/ctselect/Makefile])