# Compile Error: ldap.c:424: error: ‘LDAP\_OP T\_X\_TLS\_PROTOCOL’ undeclared (first use in this fun **URL:** \ **Category:** Ruby\ **Created:** [June 3, 2009, 3:54am UTC](https://www.ruby-forum.com/t/compile-error-ldap-c-error-a-ldap-op-t-x-tls-protocola-undeclared-first-use-in-this-fun/169381 "2009-06-03T03:54:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [June 3, 2009, 3:54am UTC](https://www.ruby-forum.com/t/compile-error-ldap-c-error-a-ldap-op-t-x-tls-protocola-undeclared-first-use-in-this-fun/169381/1 "2009-06-03T03:54:23Z")
root@leopard:~/libldap-ruby-0.9.7# make gcc -I. -I. -I/usr/local/lib/ruby/1.8/i686-linux -I. -DUSE\_OPENLDAP2 -DUSE\_OPENLDAP -DLDAP\_DEPRECATED -D\_REENTRANT -DHAVE\_LDAP\_H -DHAVE\_LBER\_H -DHAVE\_LDAP\_INIT -DHAVE\_LDAP\_SET\_OPTION -DHAVE\_LDAP\_GET\_OPTION -DHAVE\_LDAP\_START\_TLS\_S -DHAVE\_LDAP\_MEMFREE -DHAVE\_LDAP\_PERROR -DHAVE\_LDAP\_SORT\_ENTRIES -DHAVE\_LDAP\_SASL\_BIND\_S -DHAVE\_LDAP\_COMPARE\_S -DHAVE\_LDAP\_ADD\_EXT\_S -DHAVE\_LDAP\_COMPARE\_EXT\_S -DHAVE\_LDAP\_DELETE\_EXT\_S -DHAVE\_LDAP\_MODIFY\_EXT\_S -DHAVE\_LDAP\_SEARCH\_EXT\_S -DHAVE\_LDAP\_UNBIND\_EXT\_S -DHAVE\_LDAP\_SASL\_INTERACTIVE\_BIND\_S -D\_FILE\_OFFSET\_BITS=64 -fPIC -g -O2 -c ldap.c ldap.c: In function ‘Init\_ldap’: ldap.c:424: error: ‘LDAP\_OPT\_X\_TLS\_PROTOCOL’ undeclared (first use in this function) ldap.c:424: error: (Each undeclared identifier is reported only once ldap.c:424: error: for each function it appears in.) make: \*\*\* [ldap.o] Error 1 root@leopard:~/libldap-ruby-0.9.7# ----snip---- I followed the directions in the README under ‘BUILDING’. I was able to get the extconf.rb to run after doing apt-get install libldap2-dev. I had already successfully built and installed ruby and openssl from source on this Ubuntu Server: root@leopard:~# uname -a Linux leopard 2.6.28-11-server #42-Ubuntu SMP Fri Apr 17 02:48:10 UTC 2009 i686 GNU/Linux openssl appears to be working, and is installed in the appropriate spot. This is probably just an omission I am not guessing. Can someone see something obvious? If not I’ll file a bug tomorrow. Perhaps this is not a roadblock, but it appears to be a real bug if it cannot compile. I see not reference to the symbol LOAD\_OPT\_X\_TLS\_PROTOCOL in the directory tree. ---
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [June 3, 2009, 4:03am UTC](https://www.ruby-forum.com/t/compile-error-ldap-c-error-a-ldap-op-t-x-tls-protocola-undeclared-first-use-in-this-fun/169381/2 "2009-06-03T04:03:44Z")
Xeno C. wrote: > -O2 -c ldap.c > had already successfully built and installed ruby and openssl from > source on this Ubuntu Server: root@leopard:~# uname -a > Linux leopard 2.6.28-11-server #42-Ubuntu SMP Fri Apr 17 02:48:10 UTC > 2009 i686 GNU/Linux > openssl appears to be working, and is installed in the appropriate > spot. This is probably just an omission I am not guessing. Can someone > see something obvious? If not I’ll file a bug tomorrow. > > Perhaps this is not a roadblock, but it appears to be a real bug if it > cannot compile. I see not reference to the symbol > Sorry. I should have said LDAP\_OPT\_X\_TLS\_PROTOCOL does not exist in the > tree > except in conn.c and ldap.c. ---
**Author:** ![Xeno\_C](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/x/958977/32.png) [@Xeno\_C](https://www.ruby-forum.com/u/Xeno_C)\ **Post date:** [June 3, 2009, 11:02am UTC](https://www.ruby-forum.com/t/compile-error-ldap-c-error-a-ldap-op-t-x-tls-protocola-undeclared-first-use-in-this-fun/169381/3 "2009-06-03T11:02:31Z")
This is standard C debugging, so I don’t think it really belongs on a Ruby list any more. $ find /usr/include -type f | xargs grep LDAP\_OPT\_X\_TLS\_PROTOCOL /usr/include/ldap.h:/\* #define LDAP\_OPT\_X\_TLS\_PROTOCOL 0x6007 \*/ So the constant exists in the openldap headers, but is commented out for some reason. A note earlier in the file says this is an openldap private option. As to why ruby-ldap uses this option, but openldap doesn’t provide it: well, that’s something to do with the ruby-ldap library. If you look at the patches which the Ubuntu package applies to make it build, you’ll probably find what they do to fix it.