[cfe-dev] Compiling a simple Win32 program

Mikael Lyngvig mikael at lyngvig.org
Wed Jun 13 01:15:03 PDT 2012

I suggest that you don't hardwire the info into the tool but rather make an
external text file with a list of places to search or something.  Once I
get around to it, I was planning to look into eliminating the hardwired
paths from Clang because they are only marginally useful on Windows and are
very likely to cause all sorts of unexpected behavior - if, for instance,
the user has multiple version of Mingw installed (I have both Mingw32 and
Mingw64 installed).  Luckily, I decided to name my Mingw32 installation
that: C:\Mingw32.  Otherwise, Clang would have made use of Mingw32 features
even though it was built as a 64-bit compiler that should only make use of
Mingw64.  Perhaps a new option, "-basedir" or something, should be added so
the user can explicitly specify what directory to use as the base directory
for include file and library searches.

2012/6/13 Nikola Smiljanic <popizdeh at gmail.com>

> MinGW users should be in the clear since GnuWin32 only collides with
> link.exe from VS, or so I think. The question is how to decide whether to
> search for msvc or mingw, but this is where the default triple comes into
> play?
> On Wed, Jun 13, 2012 at 9:59 AM, Mikael Lyngvig <mikael at lyngvig.org>wrote:
>> Hehe, what if the user prepends the GnuWin32 tools or MSYS to the path
>> AFTER having run vcvarsall.bat?  Anyway, I figure that most LLVM users are
>> bright enough that they'll figure it out quickly.
>> 2012/6/13 Michael Spencer <bigcheesegs at gmail.com>
>>> On Tue, Jun 12, 2012 at 8:09 PM, Mikael Lyngvig <mikael at lyngvig.org>
>>> wrote:
>>> > Just be aware that GnuWin32 includes a link.exe command, which creates
>>> > symbolic or hard links (not sure which).  It is part of GNU coreutils.
>>>  So
>>> > if the user sets up an environment to use GnuWin32 and Mingw32, so as
>>> to be
>>> > able to run the llvm test suite, you'll bug into this one.
>>> vcvars prepends it's paths to PATH, so it will not find gnuwin32 or
>>> mingw/msys link.
>>> - Michael Spencer
>>> > 2012/6/12 Nikola Smiljanic <popizdeh at gmail.com>
>>> >>
>>> >> It will search the path to find the first link.exe. The one from
>>> Visual
>>> >> Studio should be first if Command prompt or vcvars.bat are used.
>>> >>
>>> >>
>>> >> On Tue, Jun 12, 2012 at 2:23 PM, Kim Gräsman <kim.grasman at gmail.com>
>>> >> wrote:
>>> >>>
>>> >>>
>>> >>> That sounds like it would match my expectations for behavior, good
>>> idea!
>>> >>>
>>> >>> Can you have it fall back on %PATH% if no VS environment variables
>>> are
>>> >>> found?
>>> >>>
>>> >>> Thanks,
>>> >>> - Kim

-- Love Thy Frog!
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