cross-compile with clang using mingw on linux

Question

I was trying to compile under linux for windows. I have installed binutils multilib for linux and w64-mingw. If I compile with x86_64-w64-mingw-gcc everything work, but if I use clang with -target x86_64-w64-mingw or x86_64-windows-gnu compiler give me lots of warnings and a include error for windows.h.

What is the problem? Clang does not support mingw binutils?

P.S. I also are interested in cross-compilig for freebsd, where can I found binutils for targeting freebsd?

Thank you very much in advance :)

Answer 1

-target isn't enough, you also need to specify the include directories, i.e.:

clang -target i686-w64-mingw32 -nostdinc -fno-exceptions -isystem /opt/compiler/llvm-3.6/bin/../lib/clang/3.6.0/include -isystem /opt/compiler/mingw-w64/i686-w64-mingw32/include -isystem /opt/compiler/mingw-w64/i686-w64-mingw32/include/c++/4.9.2 -isystem /opt/compiler/mingw-w64/i686-w64-mingw32/include/c++/4.9.2/backward -isystem /opt/compiler/mingw-w64/i686-w64-mingw32/include/c++/4.9.2/i686-w64-mingw32

You may find my project useful: https://github.com/tpoechtrager/wclang - that tool is doing all the nasty include directory searching for you.

Answer 2

My ELLCC project packages clang with libraries and include files that can target multiple targets, including various Linux targets and Windows using MinGW-64 includes and libraries. I have a slightly modified version of clang, which I call ecc, that supports configuration files to specify where to get include files, how to link, etc. A typical config file for clang/mingw looks like this. I've modified clang's -target option to check for an applicable config file and use it if it exists.For example, to target 64 bit Windows, you use the command line

ecc -target x86_64-w64-mingw32 hello.c

To compile the same program for e.g. an ARM Linux system, you can use a command line like

ecc -target arm-linux-engeabihf hello.c

A complete list of the supported targets is available here. Pre-compiled binary packages for various Linux hosts and Windows are available. The packages include binutils and GDB that support all the targets.