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From:	"Hannu E K Nevalainen" <garbage_collector AT telia DOT com>
To:	<cygwin AT cygwin DOT com>
Subject:	RE: __CYGWIN__ ++ FAQ change?
Date:	Thu, 16 Oct 2003 20:52:26 +0200
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> From: Igor Pechtchanski
> Sent: Thursday, September 25, 2003 10:03 PM

> Hannu,
> 
> faq.txt is generated.  See
> <http://cygwin.com/ml/cygwin/2003-09/msg01613.html> for the location of
> the "real" faq.
> 	Igor

 ...retry.

-- Changelog --
2003-10-16  Hannu E K Nevalainen  <garbage_collector AT telia DOT com>

* how-programming.texinfo: Add some words about -mno-cygwin,
the difference with regard to preprocessor symbols and how to
investigate it further.
--

/Hannu E K Nevalainen, B.Sc. EE - 59?16.37'N, 17?12.60'E
-- (DST) ? UTC+02 : UTC+01 --
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--- /src/winsup/doc/how-programming.texinfo	2003-02-13 =
15:20:32.000000000 +0100=0A=
+++ /src/winsup/doc/how-programming.texinfo-Hannu	2003-10-16 =
20:22:24.000000000 +0200=0A=
@@ -558,7 +558,7 @@ If your scripts are in the current direc=0A=
 you would need to add /bin/sh in front of each and every shell script=0A=
 invoked in your Makefiles.=0A=
 =0A=
-@subsection What preprocessor do I need to know about?=0A=
+@subsection What preprocessor symbols do I need to know about?=0A=
 =0A=
 We use _WIN32 to signify access to the Win32 API and __CYGWIN__ for=0A=
 access to the Cygwin environment provided by the dll.=0A=
@@ -574,6 +574,17 @@ Unix emulation environment and defining =0A=
 which think that they have to make special concessions for a Windows=0A=
 environment which Cygwin handles automatically.=0A=
 =0A=
+Note that using -mno-cygwin replaces __CYGWIN__ with __MINGW32__ as to=0A=
+tell which compiler (or settings) you're running.=0A=
+Check this out in detail by running e.g.=0A=
+       $ gcc <option> -dM -E -xc /dev/null >gcc_<option>.txt=0A=
+with each <option>. Then use the diff and grep utilities to check=0A=
+what the difference is.=0A=
+Relevant <option> keywords;=0A=
+ -mno-cygwin=0A=
+ -mwin32=0A=
+ nothing (i.e. remove <option> and use the default WRT this).=0A=
+=0A=
 @subsection How should I port my Unix GUI to Windows?=0A=
 =0A=
 There are two basic strategies for porting Unix GUIs to Windows.=0A=

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2003-10-16  Hannu E K Nevalainen  <garbage_collector AT telia DOT com>=0A=
=0A=
* how-programming.texinfo: Add some words about -mno-cygwin,=0A=
the difference with regard to preprocessor symbols and how to=0A=
investigate it further.=0A=


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