From:	khan AT xraylith DOT wisc DOT edu (Mumit Khan)
Subject:	Re: Mingw32 egcs 1.1.1, GCC_EXEC_PREFIX and CreateProcess
7 Jan 1999 18:26:39 -0800 :
Message-ID:	<Pine.SUN.3.93.990107093256.7049C-100000.cygnus.gnu-win32@modi.xraylith.wisc.edu>
References:	<199901042036 DOT VAA02870 AT wanadoo DOT fr>
Mime-Version:	1.0
To:	Gilles Depeyrot <Gilles DOT Depeyrot AT wanadoo DOT fr>
Cc:	gnu-win32 AT cygnus DOT com

On Mon, 4 Jan 1999, Gilles Depeyrot wrote:

> I'm having a problem with Mingw32 egcs-1.1.1 concerning the
> GCC_EXEC_PREFIX environment variable.
> 
> I launch and run egcs from inside an Win32 application using
> a call to CreateProcess. This works fine except for the fact
> that in this case, GCC_EXEC_PREFIX *must* be defined or I get
> an error message:
> 
> gcc: installation problem, unable to exec `cpp'

Gilles,

I believe I've finally tracked the bug down (and fixed it)! Depending on
the shell or method invocation, argv[0] may or may not have .exe and
that's where the trouble is:
  
  - command      : ``gcc'' -- > argv[0] == 'c:\egcs-1.1.1\gcc.exe'
  - cmd          : ``gcc'' -- > argv[0] == 'c:\egcs-1.1.1\gcc.exe'
  - bash         : ``gcc'' --> argv[0] == 'gcc' 
  - CreateProcess : no implicit .exe appendage 

It always worked for command.com because it always expands the full path
and puts it in argv[0]!

Could you try a quick experiment: Try to execute gcc.exe as opposed to gcc
via CreateProcess; if it works, then I have found the problem and I can
work up an update.

Regards,
Mumit


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