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https://issues.apache.org/jira/browse/STDCXX-336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Sebor updated STDCXX-336:
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Affects Version/s: 4.2.0
Fix Version/s: (was: 4.2.1)
4.3
All of this is far too involved for a maintenance release. Rescheduled for 4.3.
> allow multiple config.h files in the same installation directory
> ----------------------------------------------------------------
>
> Key: STDCXX-336
> URL: https://issues.apache.org/jira/browse/STDCXX-336
> Project: C++ Standard Library
> Issue Type: Improvement
> Components: Configuration
> Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2.0
> Environment: all
> Reporter: Andrew Black
> Priority: Critical
> Fix For: 4.3
>
>
> A useful enhancement could be the ability to install multiple versions of the
> standard library into the same location. While there is nothing in the
> makefiles that would prevent such an installation, a problem arises with the
> config.h file in the include sub directory of the install directory. Only
> one config.h file can reside in this location at a time, and different
> versions (such as those generated when characterizations are run with
> different compilers) may differ.
> One problem that needs to be considered in implementing (or deciding not to
> implement) this request is the situation where a config.h file hasn't been
> generated for a particular os/compiler/buildtype/buildtag.
> Another problem to consider is when you have the same os/buildtype/buildtag,
> but different compilers, and one or both compilers support features that the
> other doesn't.
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