Topic: Building httpd with ldap and ssl and using mod_authnz_ldap

[Shaggy1]

Hi

System info:
cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.4 (Santiago)

uname -a
Linux lb-cam-bca-13 2.6.32-642.15.1.el6.x86_64 #1 SMP Fri Feb 24 14:31:22 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

httpd -version
Server version: Apache/2.4.25 (Unix)
Server built: Jun 27 2017 16:23:25

gcc --version
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-17)

---------------------------------------------

I have installed a local version of apache 2.4 on my rhel 6 machine and is currently up and running fine.


However I now wish to enable ldap support on it and so initially tried to configure using the following:
./configure --prefix=/lb-cam-bca-13/usr/local/apache --with-included-apr --enable-ldap --enable-authnz-ldap --enable-ssl --enable-so --with-ldap


which seems to configure ok, but when I try to build I get the following errors:
gcc -std=gnu99 -g -O2 -pthread -DLINUX -D_REENTRANT -D_GNU_SOURCE -I. -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/os/unix -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/include -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/srclib/apr/include -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/srclib/apr-util/include -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/aaa -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/cache -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/core -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/database -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/filters -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/ldap -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/loggers -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/lua -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/proxy -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/session -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/ssl -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/test -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/server -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/arch/unix -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/dav/main -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/generators -I/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/modules/mappers -c /lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/server/buildmark.c
/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/srclib/apr/libtool --silent --mode=link gcc -std=gnu99 -g -O2 -pthread -o httpd modules.lo buildmark.o -export-dynamic server/libmain.la modules/core/libmod_so.la modules/http/libmod_http.la server/mpm/event/libevent.la os/unix/libos.la -lpcre /lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/srclib/apr-util/libaprutil-1.la -lexpat /lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25/srclib/apr/libapr-1.la -lrt -lcrypt -lpthread
server/.libs/libmain.a(exports.o).data+0x2758): undefined reference to `apr_ldap_ssl_init'
server/.libs/libmain.a(exports.o).data+0x2760): undefined reference to `apr_ldap_ssl_deinit'
server/.libs/libmain.a(exports.o).data+0x2768): undefined reference to `apr_ldap_init'
server/.libs/libmain.a(exports.o).data+0x2770): undefined reference to `apr_ldap_info'
server/.libs/libmain.a(exports.o).data+0x2778): undefined reference to `apr_ldap_get_option'
server/.libs/libmain.a(exports.o).data+0x2780): undefined reference to `apr_ldap_set_option'
server/.libs/libmain.a(exports.o).data+0x2788): undefined reference to `apr_ldap_rebind_init'
server/.libs/libmain.a(exports.o).data+0x2790): undefined reference to `apr_ldap_rebind_add'
server/.libs/libmain.a(exports.o).data+0x2798): undefined reference to `apr_ldap_rebind_remove'
server/.libs/libmain.a(exports.o).data+0x27a0): undefined reference to `apr_ldap_is_ldap_url'
server/.libs/libmain.a(exports.o).data+0x27a8): undefined reference to `apr_ldap_is_ldaps_url'
server/.libs/libmain.a(exports.o).data+0x27b0): undefined reference to `apr_ldap_is_ldapi_url'
server/.libs/libmain.a(exports.o).data+0x27b8): undefined reference to `apr_ldap_url_parse_ext'
server/.libs/libmain.a(exports.o).data+0x27c0): undefined reference to `apr_ldap_url_parse'
collect2: ld returned 1 exit status
make[1]: *** [httpd] Error 1
make[1]: Leaving directory `/lb-cam-bca-13/usr/local/src/apache/httpd-2.4.25'
make: *** [all-recursive] Error 1

Anyone know whether I should be able to build httpd with ldap and ssl using the included apr ? And if so what runes I need to dos ?


Thinking that may be the included apr either does not support ldap or is in someway not comptible with my version of gcc thought I'd try building apr and apr-util from scratch and use --with directives to include then in the httpd build. This seemed to build ok, but when trying to run apache I get a link error.

I did the following:
download and unpack apr-1.7.0
download and unpack apr-util-1.6.1

# confgire apr-1.7.0 and build it

[James Blond]

I didn't compiled apache with ldap support so far before, but you need to set the path in the configure

e.g.

[Shaggy1]

Thank you for the reply.

I tried building a local version of ldap and openssl then explicitly specifying locations for ldap lib and include. Again all built fine, but I am still seeing the error. For completeness below is whta I did:

# openssl

[Shaggy1]

OK - it seems I was using the wrong name in the LoadModule directive.

The LoadModule line that I put in:

[glsmith]

Just a side note, when in doubt you can find these inside the module source itself, just look for

AP_DECLARE_MODULE(authnz_ldap)

and add _module at the end.