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Re: MacOS 64-bit build

From: Hans Åberg
Subject: Re: MacOS 64-bit build
Date: Thu, 9 Jan 2020 15:33:58 +0100

> On 9 Jan 2020, at 13:34, Werner LEMBERG <address@hidden> wrote:
>> `configure` should warn or bail on incompatible flex versions.  I
>> suggest we add a version check in to ensure that flex
>> version is between 2.5.37 and 2.5.39 (given that 2.5.38 and 2.5.39
>> actually works).
> What you suggest wouldn't work as expected.  There is no guarantee
> that `FlexLexer.h` found during compilation is the one that is used by
> a recent flex version.  Unfortunately, `FlexLexer.h` doesn't contain
> any version information, so it is really impossible to protect against
> this situation automatically.

Akim Demaille made a patch for it, see:

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