AC_MSG_FAILURE([magic.h header file is required])
])
+dnl libvirt (required)
+PKG_CHECK_MODULES([LIBVIRT], [libvirt])
+AC_SUBST([LIBVIRT_CFLAGS])
+AC_SUBST([LIBVIRT_LIBS])
+
+dnl libxml2 (required)
+PKG_CHECK_MODULES([LIBXML2], [libxml-2.0])
+AC_SUBST([LIBXML2_CFLAGS])
+AC_SUBST([LIBXML2_LIBS])
+
dnl hivex library (highly recommended).
dnl This used to be a part of libguestfs, but was spun off into its
dnl own separate upstream project in libguestfs 1.0.85.