Error while compiling apr-util for apache with LDAP support

Question

I am currently trying to create a custom 64bit LAMPP stack on CentOS 7, in which each component should reside in its own folder, with every dependency included and in its own folder.

Currently, I have the following structure with correctly compiled programs:

- /opt/lampp64 - apr - bzip2 - cyrus-sasl - gdbm - libtool - ncurses - openldap - openssl - pcre - perl - readline - zlib 

each software is fully contained in its folder, which has:

• a single directory for each version
• a simlink to the "current" version

I have downloaded apr-util sources at latest version and I am trying to compile them, however the command:

./configure --prefix=/opt/lampp64/apr-util/X.Y.Z --with-openssl=/opt/lampp64/openssl/current --with-openldap=/opt/lampp64/openldap/current 

Fail saying that it cannot find openldap, if I disable it all goes fine.

I know this is not a standard directory layout, it is just an experiment, however other programs with dependencies have already been correctly compiled.

Do I need to add any additional option to configure to make it "see" the LDAP libraries?

This is the whole command and output:

./configure --prefix=/opt/lampp64/apr-util/1.5.4 --with-apr=/opt/lampp64/apr/current --with-gdbm=/opt/lampp64/gdbm/current --with-openssl=/opt/lampp64/openssl/current --with-crypto --with-ldap=openldap --with-ldap-lib=/opt/lampp64/openldap/current/lib --with-ldap-include=/opt/lampp64/openldap/current/include checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking target system type... x86_64-unknown-linux-gnu checking for a BSD-compatible install... /usr/bin/install -c checking for working mkdir -p... yes APR-util Version: 1.5.4 checking for chosen layout... apr-util checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed Applying apr-util hints file rules for x86_64-unknown-linux-gnu checking for APR... yes setting CPP to "gcc -E" adding "-pthread" to CFLAGS adding "-DLINUX" to CPPFLAGS adding "-D_REENTRANT" to CPPFLAGS adding "-D_GNU_SOURCE" to CPPFLAGS checking how to run the C preprocessor... gcc -E checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes configure: checking for openssl in /opt/lampp64/openssl/current checking openssl/x509.h usability... yes checking openssl/x509.h presence... yes checking for openssl/x509.h... yes checking for BN_init in -lcrypto... yes checking for SSL_accept in -lssl... yes setting APRUTIL_LDFLAGS to "-L/opt/lampp64/openssl/current/lib" setting APRUTIL_INCLUDES to "-I/opt/lampp64/openssl/current/include" checking whether EVP_PKEY_CTX_new is declared... yes setting LDADD_crypto_openssl to "-L/opt/lampp64/openssl/current/lib -lssl -lcrypto" checking for const input buffers in OpenSSL... yes checking for ldap support... adding "-I/opt/lampp64/openldap/current/include" to APRUTIL_INCLUDES adding "-L/opt/lampp64/openldap/current/lib" to APRUTIL_LDFLAGS checking for ldap_init in -lopenldap... no checking for ldap_init in -lopenldap... no checking for ldap_init in -lopenldap... no checking for ldap_init in -lopenldap... no configure: error: could not find an LDAP library 

Answer 1

In the line:

checking for ldap_init in -lopenldap... no 

it is trying to link against a library called openldap, but when I look in my openldap lib dir I don't see a libopenldap.so:

liblber.so libldap.so libldap_r.so 

It looks like value in -lopenldap is coming from the --with-ldap=openldap option, so if I change that to --with-ldap=ldap it seems to work.

I didn't try with all your options though, so I don't know if everything else works :)

Answer 2

I just had a similar issue on RHEL7. I was compiling apr-util against a custom compiled openssl. It turns out also the openssl-devel package was installed, always failing the ./configure step on apr-util.

So for me the trick was to yum remove openssl-devel and recompile the entire stack (openssl, openldap, apr and apr-util)