lib_dir= $(exec_prefix)/lib
include_dir= $(prefix)/include
-INSTALL= @INSTALL@
+AC_INSTALL= @INSTALL@
+ifeq ($(AC_INSTALL),./install-sh -c)
+INSTALL= $(srcdir)/../$(AC_INSTALL)
+else
+INSTALL= $(AC_INSTALL)
+endif
+
INSTALL_PROGRAM= $(INSTALL) -m 755 $(INSTALL_PROGRAM_FLAGS)
INSTALL_DATA= $(INSTALL) -m 644