-AC_CHECK_HEADER(zlib.h,
- AC_CHECK_LIB(z, deflateInit2, ,
- AC_MSG_ERROR([zlib library not found, may need to use --with-zlib option])),
- AC_MSG_ERROR([zlib headers not found, may need to use --with-zlib option]))
+AC_CHECK_HEADER([zlib.h],,AC_MSG_ERROR([unable to find zlib header files]))
+AC_CHECK_LIB([z],[deflateInit2_],,AC_MSG_ERROR([unable to link with zlib library]))