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From: Edward Diener (eldiener_at_[hidden])
Date: 2020-05-01 15:50:14

On 5/1/2020 10:37 AM, Andrey Semashev via Boost wrote:
> On 2020-03-30 19:45, Edward Diener via Boost wrote:
>> 2) Updating Boost Config to support the clang-based compilers. I have
>> done this and the PR has been merged to 'develop' on Boost Config.
>> 3) In the update to Boost Config, I have created these macros:
>> a) BOOST_BORLANDC = __BORLANDC__ with __clang__ not defined
>> b) BOOST_CODEGEARC = __CODEGEARC__ with __clang__ not defined
>> c) BOOST_EMBTC = Embarcadero C++ compilers with __clang__ defined
> Are these macros not documented in Boost.Config?

They are not documented in the Boost.Config documentation. But neither
are any other BOOST_ compiler specific macros.

BOOST_BORLANDC = __BORLANDC__ && !__clang__
BOOST_CODEGEARC = __CODEGARC__ && !__clang__
BOOST_EMBTC = __CODEGEARC__ && __clang__

I did not want to have to type the equivalent of the long form whenever
Boost config.hpp was included in some library's code, so I created the
macros in borland.hpp and embarcadero.hpp in Boost.Config. In cases in a
library's code where Boost config.hpp is not being included in some TU
(rare) I create the equivalent of the long form as my fix.

The idea of my PRs to incorporate Embracadero's clang-based compilers
into Boost was to change all the old references to __BORLANDC__ and
__CODEGEARC__ to BOOST_BORLANDC and BOOST_CODEGEARC respectively so that
the Embarcadero clang based compilers are not affected by them. There
are still bugs in the Embarcadero clang based compilers, but much, much
less than in the old bcc32.

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