Set debugging CFLAGS a little bit more intelligently.

configure.ac

@@ -58,6 +58,13 @@ fi
 # change the installation directory. This could surely be done more elegantly...
 AC_PREFIX_DEFAULT([`pwd`])
 
+if test "$GCC" = yes; then
+	ALBERT_DEBUG_CFLAGS="-ggdb -fno-inline -fno-builtin"
+else
+	ALBERT_DEBUG_CFLAGS="-g"
+fi
+AC_SUBST(ALBERT_DEBUG_CFLAGS)
+
 # Checks for libraries.
 
 # Replace `main' with a function in -lm: