Modsecurity: ./configure: error: ngx_http_modsecurity_module requires the ModSecurity library.

[trueCii]

Hey there,

I am getting the following error while compiling nginx with ModSecurity-nginx. I got the ModSecurity v3/master compiled, but it fails while using the connector

System details:
CentOS release 6.8

Using the following recipe - https://github.com/SpiderLabs/ModSecurity/wiki/Compilation-recipes#centos-65-minimal

I also tried some suggestions mentioned online

export MODSECURITY_LIB="/usr/local/modsecurity/include/modsecurity"
export MODSECURITY_INC="/usr/local/modsecurity/lib"

configuring additional modules
       adding module in /tmp/kitchen/cache/nginx_auth_request/2057bdefd2137a5000d9dbdbfca049d1ba7832ad2b9f8855a88ea5dfa70bd8c1
        + ngx_http_auth_request_module was configured
       adding module in /opt/ModSecurity-nginx
       checking for ModSecurity library ... not found
       checking for ModSecurity library in /usr/local/modsecurity ... not found
        ./configure: error: ngx_http_modsecurity_module requires the ModSecurity library.
       STDERR:

/usr/local/modsecurity

tree
├── bin
│   └── modsec-rules-check
├── include
│   └── modsecurity
│       ├── actions
│       │   └── action.h
│       ├── anchored_set_variable.h
│       ├── anchored_variable.h
│       ├── audit_log.h
│       ├── collection
│       │   ├── collection.h
│       │   ├── collections.h
│       │   └── variable.h
│       ├── debug_log.h
│       ├── intervention.h
│       ├── modsecurity.h
│       ├── reading_logs_via_rule_message.h
│       ├── rule.h
│       ├── rule_message.h
│       ├── rules_exceptions.h
│       ├── rules.h
│       ├── rules_properties.h
│       ├── transaction.h
│       └── variable_origin.h
└── lib
    ├── libmodsecurity.a
    ├── libmodsecurity.la
    ├── libmodsecurity.so -> libmodsecurity.so.3.0.0
    ├── libmodsecurity.so.3 -> libmodsecurity.so.3.0.0
    └── libmodsecurity.so.3.0.0

/opt/ModSecurity

ls
aclocal.m4  bindings  CHANGES       config.log     configure     doc       install-sh  ltmain.sh    Makefile.in                   others     test         ylwrap
ar-lib      build     compile       config.status  configure.ac  examples  libtool     Makefile     missing                       README.md  test-driver
AUTHORS     build.sh  config.guess  config.sub     depcomp       headers   LICENSE     Makefile.am  modsecurity.conf-recommended  src        tools

Any suggestions on how to fix it?

[trueCii]

as per @zimmerle's suggestion SpiderLabs/ModSecurity-nginx#9, I used /usr as the prefix and exported MODSECURITY_INC & MODSECURITY_LIB while building ModSecurity and I was able to get past the error mentioned above

export MODSECURITY_INC="/opt/ModSecurity/headers/"
export MODSECURITY_LIB="/opt/ModSecurity/src/.libs/"

I am getting the following error now, I tried using the following export statement but it didn't help.
export LD_LIBRARY_PATH=/usr/lib:$LD_LIBRARY_PATH

```
STDOUT: Stopping nginx:
Starting nginx:
STDERR: /opt/nginx-1.11.13/sbin/nginx: error while loading shared libraries: libmodsecurity.so.3: cannot open shared object file: No such file or directory
/opt/nginx-1.11.13/sbin/nginx: error while loading shared libraries: libmodsecurity.so.3: cannot open shared object file: No such file or directory
---- End output of /sbin/service nginx restart ----
Ran /sbin/service nginx restart returned 127

pwd
/usr/lib

ls
anaconda-runtime games gofer libfreeblpriv3.chk libmodsecurity.a libmodsecurity.so.3 locale rpm yum-plugins
ConsoleKit gcc libfreebl3.chk libfreeblpriv3.so libmodsecurity.la libmodsecurity.so.3.0.0 pulp sendmail
cups gconv libfreebl3.so libmemusage.so libmodsecurity.so libpcprofile.so python2.6 sendmail.postfix

ls -al | grep lib
lrwxrwxrwx. 1 root root 24 Apr 7 2017 libfreebl3.chk -> ../../lib/libfreebl3.chk
lrwxrwxrwx. 1 root root 23 Apr 7 2017 libfreebl3.so -> ../../lib/libfreebl3.so
lrwxrwxrwx. 1 root root 28 Apr 7 2017 libfreeblpriv3.chk -> ../../lib/libfreeblpriv3.chk
lrwxrwxrwx. 1 root root 27 Apr 7 2017 libfreeblpriv3.so -> ../../lib/libfreeblpriv3.so
-rwxr-xr-x. 1 root root 17752 Jun 20 03:18 libmemusage.so
-rw-r--r--. 1 root root 117168772 Oct 26 16:24 libmodsecurity.a
-rwxr-xr-x. 1 root root 1074 Oct 26 16:24 libmodsecurity.la
lrwxrwxrwx. 1 root root 23 Oct 26 16:24 libmodsecurity.so -> libmodsecurity.so.3.0.0
lrwxrwxrwx. 1 root root 23 Oct 26 16:24 libmodsecurity.so.3 -> libmodsecurity.so.3.0.0
-rwxr-xr-x. 1 root root 35217830 Oct 26 16:24 libmodsecurity.so.3.0.0
-rwxr-xr-x. 1 root root 7892 Jun 20 03:18 libpcprofile.so

```

[trueCii]

Finally got it to work. Used the following flags while building the ModSecurity module

./configure -prefix=/usr --with-ld-opt="/usr/lib" --with-yajl=/opt/lloyd-yajl-66cb08c/build/yajl-2.1.0/ && make && make install

export MODSECURITY_INC="/opt/ModSecurity/headers/"
export MODSECURITY_LIB="/opt/ModSecurity/src/.libs/"

I had to run ldconfig before compiling the nginx packages with ModSecurity
--add-module=/opt/ModSecurity-nginx

This issue can be closed now.