Allow compiling on GCC < 5 / CentOS 6 (see #138)

davidjb commented 6 years ago

As per #138 (and specifically https://github.com/kvspb/nginx-auth-ldap/issues/138#issuecomment-317625746) the issue is that:

nginx compiles with -Werror (treating warnings as errors)
CentOS 6 has OpenSSL 1.0.1e, thus the LDAP module has a warning on compile
CentOS 6 has GCC 4.4. The version of GCC treats the LDAP module's statement #pragma GCC diagnostic warning "-Wcpp" as an error itself and thus skips the statement, leading to the #warning still being an error.

This adds version-checking to the warning options and the warning itself. This means that no warning is issued at compile time on this type of platform, but warnings are still emitted when starting Nginx without certificate verification, so the issue is still visible in a notable way.

Other solutions to making this module compile on CentOS 6 / GCC 4.4 are welcomed, but this seems like the lightest touch.

dasJ commented 4 years ago

As an alternative to merging this, wait until November so CentOS 6 goes EOL :smile:

davama commented 4 years ago

Wow!!! Glad to see this cool project is still being supported! Thank you very much! 👍

kvspb / nginx-auth-ldap

Allow compiling on GCC < 5 / CentOS 6 (see #138) #213