How do I configure and compile apache 2.4 with ldap support on redat 6
Question
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 ol, 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
I also noticed that there is a --with-openldap option, so I tried that as well, but this resulted in configuration errors:
configure: WARNING: apr/apr-util is compiled without ldap support
checking whether to enable mod_authnz_ldap... configure: error: mod_authnz_ldap has been requested but can not be built due to prerequisite failures
looking at config.log and seraching for error I see:
...
configure:5860: gcc -E -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c
conftest.c:9:28: error: ac_nonexistent.h: No such file or directory
134 configure:5860: $? = 1
135 configure: failed program was:
136 | /* confdefs.h */
137 | #define PACKAGE_NAME ""
138 | #define PACKAGE_TARNAME ""
139 | #define PACKAGE_VERSION ""
140 | #define PACKAGE_STRING ""
141 | #define PACKAGE_BUGREPORT ""
142 | #define PACKAGE_URL ""
143 | /* end confdefs.h. */
144 | #include <ac_nonexistent.h>
145 configure:5889: checking for gcc option to accept ISO C99
146 configure:6038: gcc -c -g -O2 -pthread -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c >&5
147 conftest.c:59: error: expected ';', ',' or ')' before 'text'
148 conftest.c: In function 'main':
149 conftest.c:113: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'newvar'
150 conftest.c:113: error: 'newvar' undeclared (first use in this function)
151 conftest.c:113: error: (Each undeclared identifier is reported only once
152 conftest.c:113: error: for each function it appears in.)
153 conftest.c:123: error: 'for' loop initial declarations are only allowed in C99 mode
154 conftest.c:123: note: use option -std=c99 or -std=gnu99 to compile your code
...
configure:6954: gcc -std=gnu99 -c -g -O2 -pthread -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c >&5
conftest.c:52:26: error: minix/config.h: No such file or directory
...
configure:6954: gcc -E -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c
conftest.c:19:26: error: minix/config.h: No such file or directory
...
configure:7397: gcc -std=gnu99 -c -g -O2 -pthread -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c >&5
531 conftest.c:66:27: error: sys/processor.h: No such file or directory
...
configure:7397: gcc -E -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c
603 conftest.c:33:27: error: sys/processor.h: No such file or directory
...
configure:7397: gcc -std=gnu99 -c -g -O2 -pthread -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c >&5
664 conftest.c:68:25: error: sys/loadavg.h: No such file or directory
...
configure:7397: gcc -E -DLINUX -D_REENTRANT -D_GNU_SOURCE conftest.c
738 conftest.c:35:25: error: sys/loadavg.h: No such file or directory
...
configure:10876: checking whether to enable mod_authnz_ldap
1075 configure:10882: error: mod_authnz_ldap has been requested but can not be built due to prerequisite failures
Given that I am using openladap over ssl for authentication - can anyone tell me how I should configure and build apache to include ldap authentication support?
Does anyone know what the difference between --with-ldap and --with-openldap is? And under which conditions one or the other should be specified?
Looking at the make errors in the first case I initially thought that the included apr was not built with ldap, but searching the source files it looks like ldap is included. Does anyone know if the default included apr includes ldap support, or do I need to down load and build a separate version (which includes ldap support)?
Looking at the config errors in the second case - are these related to the gcc version used?
Update: Thinking that may be the included apr either does not support ldap or is in someway not compatible 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
confgure apr-1.7.0 and build it
$ cd apr/apr-1.7.0
./configure --prefix=/lb-cam-bca-13/usr/local/apache
make
make install
configure apr-util-1.6.1 and build it
$ ./configure --with-crypto --with-ldap=ldap --with-openssl --with-mysql --with-apr=../../apr/apr-1.7.0 --enable-so
make
make install
configure and build httpd
$ ./configure --prefix=/lb-cam-bca-13/usr/local/apache --with-apr=../apr/apr-1.7.0 --with-apr-util=../aprutil/apr-util-1.6.1 --with-ldap --enable-authnz-ldap --enable-so --enable-ssl --enable-md --enable-log-forensic
make
make install
ready to start apache
$ apachectl stop
httpd: Syntax error on line 74 of /lb-cam-bca-13/usr/local/apache/conf/httpd.conf: Cannot load modules/mod_authnz_ldap.so into server: /lb-cam-bca-13/usr/local/apache/modules/mod_authnz_ldap.so: undefined symbol: apr_ldap_url_parse
indeed the symbol is there, but undefined:
$ objdump -awx modules/mod_authnz_ldap.so | grep url
0000000000002260 l F .text 0000000000000460 mod_auth_ldap_parse_url
0000000000000000 *UND* 0000000000000000 apr_ldap_url_parse
it is defined in apr-utils - apr_ldap_url.o...
$ objdump -awx ./ldap/.libs/apr_ldap_url.o | grep ' F ' | grep ldap
0000000000000000 l F .text 00000000000000bd apr_ldap_pvt_hex_unescape
0000000000000290 l F .text 0000000000000118 apr_ldap_str2charray.clone.0
00000000000001c0 g F .text 0000000000000026 apr_ldap_is_ldap_url
00000000000001f0 g F .text 0000000000000047 apr_ldap_is_ldapi_url
0000000000000240 g F .text 0000000000000047 apr_ldap_is_ldaps_url
00000000000003b0 g F .text 00000000000006c1 apr_ldap_url_parse_ext
0000000000000a80 g F .text 0000000000000039 apr_ldap_url_parse
... but not in apr_ldap-1.so
$ objdump -awx ./ldap/.libs/apr_ldap-1.so | grep ' F ' | grep ldap
0000000000001350 l F .text 000000000000000a apr_ldap_pool_cleanup_set_null
0000000000001400 l F .text 0000000000000010 apr_ldap_rebind_remove_helper
0000000000000000 F *UND* 0000000000000000 ldap_get_option
0000000000001360 g F .text 0000000000000095 apr__ldap_rebind_remove
0000000000000000 F *UND* 0000000000000000 ldap_set_option
0000000000000d10 g F .text 0000000000000003 apr__ldap_ssl_deinit
0000000000000f30 g F .text 000000000000034b apr__ldap_set_option
0000000000000d20 g F .text 000000000000002f apr__ldap_info
0000000000001280 g F .text 00000000000000c3 apr__ldap_get_option
0000000000000000 F *UND* 0000000000000000 ldap_init
0000000000000000 F *UND* 0000000000000000 ldap_set_rebind_proc
0000000000000000 F *UND* 0000000000000000 ldap_bind_s
0000000000000000 F *UND* 0000000000000000 ldap_start_tls_s
0000000000000000 F *UND* 0000000000000000 ldap_err2string
00000000000015c0 g F .text 0000000000000042 apr__ldap_rebind_init
0000000000000e30 g F .text 00000000000000f7 apr__ldap_ssl_init
0000000000000d50 g F .text 00000000000000d8 apr__ldap_init
0000000000001410 g F .text 0000000000000128 apr__ldap_rebind_add
Has anyone seen this problem before? I have done some searching, but have been unable to find a suitable solution (though I have seen that similar error has happened to some people before)
Does anyone know what I should do to make sure the full apr-util is included in the build?
Is there another --with directive I need use when building or is this a problem with creation of the.so file?
1 answers
solution1
0 ACCPTED 2020-08-05 09:21:47
Finally resolved. I was using incorrect syntax for the LoadModule line in the configuration file.
The LoadModule line that I put in:
LoadModule mod_authnz_ldap modules/mod_authnz_ldap.so
should be:
LoadModule authnz_ldap_module modules/mod_authnz_ldap.so
Then it works. Clearly it was looking for mod_authnz_ldap in some table somewhere and not finding it.
Using the correct name it seems to be loading (though I have not tried actually using it)
I was led down the garden path by the error message.
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