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https://issues.apache.org/jira/browse/XERCESC-2141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17072983#comment-17072983
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Scott Cantor commented on XERCESC-2141:
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I targeted this for 3.3 so if there ever is one we can just do it then and not
worry about any changes from it.
> Enable C++11/14 with autoconf build
> -----------------------------------
>
> Key: XERCESC-2141
> URL: https://issues.apache.org/jira/browse/XERCESC-2141
> Project: Xerces-C++
> Issue Type: Improvement
> Components: Build
> Reporter: Roger Leigh
> Priority: Major
> Labels: autoconf, build, c++11, c++14
> Fix For: 3.3.0
>
> Attachments: 0001-autoconf-Enable-C-14-or-C-11-when-available.patch
>
>
> The CMake build will try to put the compiler in C++14 mode, falling back to
> C++11 then C++98. The autoconf build doesn't do this, and the attached patch
> makes the behaviour match so both build systems will use the same fallbacks.
> Current compilers default to C++14. Very old compilers have no support for
> C++11 or C++14. But compilers in between support it, but not by default.
> This adds the feature tests to check for such support and enable it when
> available.
> The CMake C++ standard support is user-configurable by setting the
> CMAKE_CXX_STANDARD setting. Autoconf doesn't provide any way to do this, so
> the feature enabling isn't explicitly overridable. I'm not sure if that's
> too problematic. The main compatibility concern might be if this causes an
> ABI break with use of C++11/14 library features like the new string type.
> However, we aren't making use of any of these features. The main change
> would be the XMLCh type switch from uint16_t to char16_t. I'm not sure what
> the Xerces policy for such changes has been in the past. Any thoughts?
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