[cfe-dev] Using clang built with MSYS/Mingw on Windows
ofv at wanadoo.es
Tue Jul 5 16:22:55 PDT 2011
Edward Diener <eldlistmailingz at tropicsoft.com>
> I have been able to build clang using MSYS using the instructions on the
> clang web site. Everything appears to have built correctly except for a
> problem building the llvm sample program which I reported, and nobody
> has responded to. So I will ignore the problem as I see I have a
> clang.exe and a clang++.exe in the build/llvm/Debug+Asserts/bin directory.
> I have a number of questions:
> 1) Do I need to re-run 'configure' followed by 'make' each time I get
> the latest llvm and clang from SVN, or is running 'make' good enough.
After you executed `configure' for the first time, the makefiles will
automatically run `configure' whenever necessary.
> 2) How does clang find its headers and libraries ? In the clang User
> Manual under "Operating System Features and Limitations" for Mingw32 it
> Clang works on some mingw32 distributions. Clang assumes directories as
> This is a little confusing to me.
I think that clang has the paths hard-coded for MinGW.
> When running clang, built through MSYS, does clang understands Windows
> paths or does it need to be run from within MSYS and therefore
> understand only Linux-like paths ? The note suggests the former.
The paths you quoted are not unix-like paths. Lots of Windows
functionality handle `/' as path separator quite fine.
MSYS is required only for building clang (if you build with
configure+make) not for executing it.
> 3) Can clang handle the Windows header files used by gcc in its include
> directory as specified above ?
> 4) What is the difference between clang and clang++.exe ?
Just the name. When the executable starts it reads its own name from
argv. If it is clang++.exe, several options for compiling and linking
C++ programs are automatically added. You can use clang.exe for
compiling C++ sources, but then you need to add lots of options to the
command line for correctly handling C++ programs.
> I do not mean to be critical because I know that many developers are
> working to make clang better, but the online Users Manual is pretty
> sparse in information, so I am hoping someone can help me here or point
> me to better explanations.
I don't use clang on Windows, but once you are confident with it, if you
submit a documentation patch that would be a good contribution.
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