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From "Martin Sebor (JIRA)" <>
Subject [jira] Commented: (STDCXX-336) allow multiple config.h files in the same installation directory
Date Wed, 28 Nov 2007 04:58:43 GMT


Martin Sebor commented on STDCXX-336:

Not sure renaming the generated $BUILDDIR/include/config.h to include the name (and possibly
version) of the compiler along with the build type would be a forward compatible change...

> allow multiple config.h files in the same installation directory
> ----------------------------------------------------------------
>                 Key: STDCXX-336
>                 URL:
>             Project: C++ Standard Library
>          Issue Type: Improvement
>          Components: Configuration
>    Affects Versions: 4.1.2, 4.1.3, 4.1.4
>         Environment: all
>            Reporter: Andrew Black
>            Priority: Critical
>             Fix For: 4.2.1
> 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
> 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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