Disable static libraries by default in linux build

platform/unix/configure.ac

@@ -7,7 +7,7 @@ AM_INIT_AUTOMAKE([foreign -Wall foreign tar-ustar silent-rules])
 AM_SILENT_RULES
 AC_PREFIX_DEFAULT([/usr])
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
-AC_PROG_LIBTOOL
+LT_INIT([disable-static])
 AC_PROG_CC
 AC_PROG_CXX
 AC_PROG_SED