[SOLVED] How do I fix OpenSSL Error "libssl.so.10, needed by lib64/libldap.so, may conflict with libssl.so.1.1" when Compiling PHP on CentOS 7?

Issue

I'm starting out with a completely clean install of CentOS 7 with nothing installed.

Starting out, I have yum installed these RPM's:

• make
• mlocate
• pcre-devel
• expat-devel
• epel-release
• libxml2-devel
• yum-utils
• wget
• vim
• lynx
• libnghttp2-devel
• libnghttp2
• nghttp2
• libpng-devel
• gcc*
• perl-Module-Load-Conditional
• perl-core
• curl-devel
• openssl-devel
• mariadb-devel
• unixODBC-devel
• bzip2-devel
• libjpeg-devel
• libXpm-devel
• freetype-devel
• gmp-devel
• libmcrypt-devel
• httpd-devel

** RESOLUTION EDIT ** Added the following RPMS:

• cyrus-sasl
• cyrus-sasl-devel

I have Compiled OpenSSL 1.1.1, cURL 7.62.0, and HTTPD 2.4.38 from source with the respective commands below:

OpenSSL

$ ./config \
  --prefix=/opt/openssl \
  -Wl,-rpath=/opt/openssl/bin \
  --openssldir=/opt/openssl \
  shared \
  zlib
$ make clean
$ make
$ make install

$ openssl version
OpenSSL 1.1.1  11 Sep 2018

cURL

$ env PKG_CONFIG_PATH=/opt/openssl/lib/pkgconfig ./configure \
  --prefix=/opt/curl \
  --with-ssl \
  LDFLAGS="-L/opt/openssl/lib -Wl,-rpath,/opt/openssl/lib"
  CPPFLAGS="-I/opt/openssl/include -Wl,-rpath,/opt/openssl/include"
make clean
make
make install

$ curl -V
curl 7.62.0 (x86_64-pc-linux-gnu) libcurl/7.62.0 OpenSSL/1.1.1 zlib/1.2.7 nghttp2/1.31.1
Release-Date: 2018-10-31
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP HTTP2 UnixSockets HTTPS-proxy

HTTPD

$ env PKG_CONFIG_PATH=/opt/openssl/lib/pkgconfig ./configure \
  --prefix=/opt/httpd \
  --with-included-apr \
  --enable-so \
  --with-port=80 \
  --enable-http2 \
  --enable-ssl \
  --enable-ssl=shared \
  --with-ssl=/opt/openssl \
  --with-curl=/opt/curl \
  LDFLAG="-L/opt/openssl/lib -Wl,-rpath,/opt/openssl/lib -L/opt/curl/lib -Wl,-rpath,/opt/curl/lib" \
  CPPFLAGS="-I/opt/openssl/include -Wl,-rpath,/opt/openssl/include -I/opt/curl/include -Wl,-rpath,/opt/curl/include"
$ make clean
$ make
$ make install

$ httpd -v
Server version: Apache/2.4.38 (Unix)
Server built:   Mar 13 2019 15:14:01

Everything works fine up to this point. I am able to load an HTML page through a browser on a remote machine. (after opening port 80)

Here is where I start running into problems.

** OPENLDAP EDIT (RESOLVED BY COMPILING OPEN LDAP) **

$ env PKG_CONFIG_PATH=/opt/openssl/lib/pkgconfig ./configure \
  --prefix=/opt/openldap \
  --with-tls \
  LDFLAGS="-L/opt/openssl/lib -Wl,-rpath,/opt/openssl/lib" \
  CPPFLAGS="-I/opt/openssl/include -Wl,-rpath,/opt/openssl/include"
$ make clean
$ make depend
$ make
$ make install

PHP

$ env PKG_CONFIG_PATH=/opt/openssl/lib/pkgconfig ./configure \
  --with-apxs2=/opt/httpd/bin/apxs \
  --prefix=/opt/php \
  --with-mysqli \
  --with-pdo-mysql \
  --enable-pdo \
  --enable-ftp \
  --with-zlib \
  --enable-zip \
  --enable-mbstring \
  --with-curl=/opt/curl \
  --with-openssl \
  --with-openssl-dir=/opt/openssl  \
  --enable-exif \
  --with-gd \
  --enable-shared \
  --enable-cgi \
  --with-ldap=/opt/openldap \
  LDFLAGS="-Wl,-rpath,/opt/openldap/lib -L/opt/openldap/lib -Wl,-rpath,/opt/openssl/lib -L/opt/openssl/lib" \
  CPPFLAGS="-Wl,-rpath,/opt/openldap/include -I/opt/openldap/include -Wl,-rpath,/opt/openssl/include -I/opt/openssl/include"
$ make clean
$ make
$ make install

Make Error

Upon running make clean;make I am presented with this error:

  /usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
  /usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
  /usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
  /usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
  /usr/bin/ld: ext/openssl/.libs/xp_ssl.o: undefined reference to symbol 'SSLv3_server_method@@libssl.so.10'
  //usr/lib64/libssl.so.10: error adding symbols: DSO missing from command line
  collect2: error: ld returned 1 exit status
  make: *** [sapi/cli/php] Error 1

Make Test Log

The make test command returns the same errors.

/usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
/usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
/usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
/usr/bin/ld: warning: libssl.so.10, needed by /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libldap.so, may conflict with libssl.so.1.1
/usr/bin/ld: ext/openssl/.libs/xp_ssl.o: undefined reference to symbol 'SSLv3_server_method@@libssl.so.10'
//usr/lib64/libssl.so.10: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make: *** [sapi/cli/php] Error 1

Solution

To stop this warning use the systems SSL-Library and do not compile it yourself.

Or you must build all libraries, you are using, which link against OpenSSL, yourself (In your case libldap)

Answered By - arved