Issues with Windows gcc -mno-cygwin (Mingw)

From: Benjamin Riefenstahl <Benjamin.Riefenstahl@epost.de>
Subject: Issues with Windows gcc -mno-cygwin (Mingw)
Date: 18 Mar 2003 18:14:09 +0100	[thread overview]
Message-ID: <m3vfyg38da.fsf@cicero.benny.turtle-trading.net> (raw)

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Hi all,

I have compiled the CVS HEAD with the Cygwin Mingw cross-environment
(gcc -mno-cygwin).  I have had two problems:

- The cygpath issue.  The Makefiles have the necessary code to use the
  Cygwin cygpath utility, but it's commented out.  I appreciate that
  the situation is not very stable in that area, but could we consider
  a conditional and a configure item for this?  We do need that code
  as long as we want Emacs to support Cygwin at compile-time, but not
  at run-time, because without that code the Makefile will provide
  Cygwin paths to ELisp.

- Problem with _fmode (global MSC variable set to O_BINARY as the
  default file mode).  For a simple patch see below.  Strictly
  speaking I think the real problem is that this is not handled
  without the _fmode hack.  The code should just use its own global
  variable (or even more simply just add O_BINARY everywhere) instead
  of using this brittle compiler/runtime dependent solution.

so long, benny

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Index: unexw32.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/unexw32.c,v
retrieving revision 1.22
diff -c -r1.22 unexw32.c
*** unexw32.c	4 Feb 2003 14:03:13 -0000	1.22
--- unexw32.c	18 Mar 2003 16:19:04 -0000
***************
*** 83,88 ****
--- 83,92 ----

  PIMAGE_SECTION_HEADER heap_section;

+ /* Needed by the Mingw CRT to override _fmode, setting down in _start
+    doesn't work, it gets reset somewhere in mainCRTStartup() */
+ int _fmode = O_BINARY;
+ 
  #ifdef HAVE_NTGUI
  HINSTANCE hinst = NULL;
  HINSTANCE hprevinst = NULL;

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