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To:	"Schaible, Joerg" <Joerg DOT Schaible AT gft DOT de>
cc:	"'cygwin AT sourceware DOT cygnus DOT com'" <cygwin AT sourceware DOT cygnus DOT com>
Subject:	Re: Compiler macros with version
In-reply-to:	Your message of "Wed, 05 May 1999 16:00:07 +0200."
	<C2D7D58DBFE9D111B0480060086E96358D6F93 AT gftmail DOT gft DOT de>
Date:	Wed, 05 May 1999 10:37:36 -0500
From:	Mumit Khan <khan AT xraylith DOT wisc DOT EDU>

"Schaible, Joerg" <Joerg DOT Schaible AT gft DOT de> writes:
> Hello out there!
> 
> Are there any predefined macros containing the version of the compiler =
> e.g.
> like _MSC_VER =3D 0x1200 for the MSVC6?
> 
> I am using the cygwin B20 suite and the EGCS 1.1.2 / Mingw32 port from =
> Mumit
> Khan.
> 
> I suppose it may be __GNUC__ or __CYGWIN__, but which value do they =
> have and
> are there others (identifying egcs)?
> 

Here's how you can find all the predefined macros:
  
  $ echo "" > dummy.c
  $ gcc -E -dM dummy.c

You'll see the following in the output:
  
  __GNUC__ -- all gnu Compiler versions (egcs = 2)
  __GNUC_MINOR__ -- all gnu Compiler versions (egcs = 91)
  __CYGWIN__ -- CYGWIN
  __CYGWIN32__ -- old Cygwin (pre b20, now deprecated)

__GNUC_MINOR__ >= 90 implies EGCS as opposed to FSF GCC-2.x.x. When EGCS
becomes GCC 3, then __GNUC__ will become 3 and __GNUC_MINOR__ will reset.

Regards,
Mumit


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