MySQL Bugs: #97475: gcc 5.5.0 compilation warnings for router

Bug #97475	gcc 5.5.0 compilation warnings for router
Submitted:	4 Nov 2019 17:00	Modified:	14 Nov 2019 21:34
Reporter:	Przemysław Skibiński (OCA)	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Compiling	Severity:	S3 (Non-critical)
Version:	8.0.18	OS:	Any
Assigned to:		CPU Architecture:	Any

Description:
gcc version 5.5.0 20171010 (Ubuntu 5.5.0-12ubuntu1) reports:

1.
/data/mysql-server/mysql-8.0/router/src/http/src/tls_context.cc: In function ‘constexpr int o11x_version(TlsVersion)’:
/data/mysql-server/mysql-8.0/router/src/http/src/tls_context.cc:99:57: error: expression ‘<throw-expression>’ is not a constant-expression
       throw std::invalid_argument("version out of range");
           
2.                                              ^
/data/mysql-server/mysql-8.0/router/src/http/src/tls_server_context.cc: In constructor ‘TlsServerContext::TlsServerContext(TlsVersion, TlsVersion)’:
/data/mysql-server/mysql-8.0/router/src/http/src/tls_server_context.cc:67:43: error: statement has no effect [-Werror=unused-value]
   SSL_CTX_set_ecdh_auto(ssl_ctx_.get(), 1);
                                           ^
cc1plus: all warnings being treated as errors

How to repeat:
cmake -DCMAKE_BUILD_TYPE=Debug -DMYSQL_MAINTAINER_MODE=ON -DBUILD_CONFIG=mysql_release -DFEATURE_SET=community

Suggested fix:
1. It seems to be gcc Bug 67371 - Never executed "throw" in constexpr function fails to compile
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67371

Hello Przemysław,

Thank you for the report and feedback.

Thanks,
Umesh

Build results

Attachment: 97475.results (application/octet-stream, text), 125.79 KiB.

Posted by developer:
 
The first part

  expression ‘<throw-expression>’ is not a constant-expression

is a duplicate of Bug#30406328

Posted by developer:
 
Fixed as of the upcoming MySQL Router 8.0.19 release, and here's the changelog entry:

  Fixed gcc 5.5 compilation warnings.

Thank you for the bug report.