[CMake] EXECUTE_PROCESS too good at running programs

[Brad King]

Brandon J. Van Every wrote:
> I explained the situation pretty clearly, I thought. 
> E:\msys\1.0\bin\makefile does *NOT* run under a Windows command prompt. 
> It's not supposed to.  As I said before, there's a comment at the top of
> the binary that says it's not supposed to.  Just to reiterate again in
> case there's any doubt:
> 
> E:\msys\1.0\bin>dir makeinfo
> Volume in drive E is MONDRIAN
> Volume Serial Number is 9CA0-CADF
> 
> Directory of E:\msys\1.0\bin
> 
> 04/30/2004  11:15p             180,224 makeinfo
>               1 File(s)        180,224 bytes
>               0 Dir(s)  11,499,749,376 bytes free
> 
> E:\msys\1.0\bin>cmd
> Microsoft Windows 2000 [Version 5.00.2195]
> (C) Copyright 1985-2000 Microsoft Corp.
> 
> E:\msys\1.0\bin>makeinfo
> 'makeinfo' is not recognized as an internal or external command,
> operable program or batch file.

I don't think your test is reliable.  My MSYS has a makeinfo.exe and it
runs under a windows shell.

Anyway, if you want to test whether a program is executable under the
build environment, you should use TRY_COMPILE with a small project with
a custom command to run the program.

-Brad