diff --git a/configure.ac b/configure.ac
index 17010b3..666519d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,41 +1,40 @@
-dnl Process this file with autoconf to produce a configure script.
+# Process this file with autoconf to produce a configure script.
 
 AC_INIT([gamma], [0.1], [knodlseder@cesr.fr])
-AC_CONFIG_SRCDIR(src/gammalib.hpp)
+# AC_CONFIG_SRCDIR(src/gammalib.hpp)
+AC_CONFIG_SRCDIR(src/GException.hpp)
 
 AM_INIT_AUTOMAKE([gnu no-dependencies])
 AM_CONFIG_HEADER([config.h])
 AM_MAINTAINER_MODE
 
-dnl things required by automake
-dnl AC_ARG_PROGRAM
+# things required by automake
+# AC_ARG_PROGRAM
 AC_PROG_MAKE_SET
 
-dnl Check for which system.
-dnl AC_CANONICAL_HOST
+# Check for which system.
+# AC_CANONICAL_HOST
 
-dnl Checks for programs.
+# Checks for programs.
 AC_PROG_CXX
-dnl AC_LANG(C)
-dnl AC_PROG_CC
-dnl AC_PROG_CPP
-dnl AC_PROG_INSTALL
-dnl AC_PROG_LN_S
-
-dnl libtool test.
 AC_PROG_LIBTOOL
+AC_SUBST(LIBTOOL_DEPS)
+# AC_LANG(C)
+# AC_PROG_CC
+# AC_PROG_CPP
+# AC_PROG_INSTALL
+# AC_PROG_LN_S
 
-dnl Check compiler features
-dnl AC_TYPE_SIZE_T
-dnl AC_C_CONST
-dnl AC_C_VOLATILE
-dnl AC_C_INLINE
+# Checks for libraries.
 
-dnl Checks for header files.
+# Checks for header files.
 
-dnl Checks for typedefs, structures, and compiler characteristics.
+# Checks for typedefs, structures, and compiler characteristics.
+# AC_TYPE_SIZE_T
+# AC_C_CONST
+# AC_C_VOLATILE
+# AC_C_INLINE
 
-dnl Checks for library functions.
 
 AC_CONFIG_FILES([Makefile src/Makefile test/Makefile])
 AC_OUTPUT