[cfe-users] LLVM : Clang : 3.8.0 (trunk) : Windows 7 64-bit : libc++ missing?

Mayuresh Kathe mayuresh at kathe.in
Mon Aug 3 00:30:05 PDT 2015

On 2015-08-03 12:35 PM, Jeffrey Walton wrote:
>> I have to run Windows 7 Professional 64-bit (due unforeseen 
>> circumstances)
>> instead of my preferred OS, i.e. FreeBSD.
>> I just downloaded the Clang toolkit environment installer
>> (LLVM-3.8.0-r243265-win64) for Windows (from 
>> http://www.llvm.org/builds/)
>> and post finishing the install found that clang++.exe refuses to 
>> compile
>> even a simple C++ program (below);
>> int main(int argc, char* argv[]) {
>>     return 0;
>> }
>> The error messages thrown out were (below);
>> clang++.exe: error: unable to execute command: program not executable
>> clang++.exe: error: linker command failed with exit code 1 (use -v to 
>> see
>> invocation)
>> Before this, I tried compiling a more fleshed out program with 
>> "includes"
>> and "namespaces" and "cout", etc., but then clang++.exe told me about
>> absence of "iostream".
>> Isn't "iostream" a part of "libc++"?
>> If yes, is there any pre-built "libc++" installable for Windows?
>> If not, is there any documentation which shows how to get it compiled 
>> under
>> Windows?
> Yeah, you need to download and build libcxx in addition to LLVM, Clang
> (CFE), and Tools.
> You can find libcxx at http://libcxx.llvm.org/.
> Also, the Autotools/Make based stuff does not work because it does not
> detect the presence of libcxx in-tree (or is it out-of-tree?). Use the
> Cmake gear instead.
> Ditto for LLDB if you choose to build it, too.

Thanks for the response.

Is there any documentation anywhere which would show me how to build 

Also, what should I have installed on my system other than Clang/LLVM to 
be able to build libc++ itself? Haven't found any traces of Cmake on my 
Windows 7 install.


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