Cross Compile Neovim

gistfile1.md

Before you start you need a Mingw-w64 toolchain for Linux, try installing the mingw-w64 package (Ubuntu, Suse, Fedora?) or get it from the Mingw-w64 website.

Build dependencies

$ mkdir deps-mingw
$ cd deps-mingw
$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/mingw32-w64-cross-travis.toolchain.cmake ../third-party/
$ make
$ cd ..

Build Neovim

$ mkdir build-mingw
$ cd build-mingw
$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/mingw32-w64-cross-travis.toolchain.cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_FLAGS="-DMIN_LOG_LEVEL=0 -pg" -DDEPS_PREFIX=../deps-mingw/usr ..
$ make
$ wine bin/nvim.exe

You may get some errors (like missing dlls) when running, but this depends on your Mingw toolchain. Just copy the missing dll into the bin/ folder.

FYI: the terminal interface IS broken, so there wont be any output - but you can use one of the Neovim GUIs

Debugging

$ wine /usr/i686-w64-mingw32/sys-root/mingw/bin/gdbserver.exe :0 bin/nvim.exe
Process bin/nvim.exe created; pid = 36
Listening on port 47612

or alternatively

$ winedbg --gdb --no-start bin/nvim.exe

And them connect to gdbserver

$ gdb bin/nvim.exe 
GNU gdb (GDB; openSUSE 13.1) 7.6.50.20130731-cvs
(...)
(gdb) target remote localhost:47612
Remote debugging using localhost:47612
warning: Could not load shared library symbols for 12 libraries, e.g. C:\windows\system32\kernel32.dll.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
0x7b862737 in ?? ()

from here on out, it is regular gdb, use continue (not run) to start executing.

TODO

• Windows system DLL symbols are not available

Known issues

Linking fails, with an error finding -lrt, -ldl, -lnsl - this seems to happen when an existing version of libuv is already installed (and the linking options are picked up from pkg-config). It is not clear why pkg-config is being used for the cross compile though.

Ubuntu (VirtualBox):
Build dependencies - OK
Build Neovim:

gentlefly@gentlefly-VirtualBox:~$ cd nvim/neovim/build-mingw/
gentlefly@gentlefly-VirtualBox:~/nvim/neovim/build-mingw$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/mingw32-w64-cross-travis.toolchain.cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_FLAGS="-DMIN_LOG_LEVEL=0 -pg" -DDEPS_PREFIX=../deps-mingw/usr ..
-- The C compiler identification is GNU 4.8.2
-- The CXX compiler identification is GNU 4.8.2
-- Check for working C compiler: /usr/bin/i686-w64-mingw32-gcc
-- Check for working C compiler: /usr/bin/i686-w64-mingw32-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/i686-w64-mingw32-g++
-- Check for working CXX compiler: /usr/bin/i686-w64-mingw32-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Performing Test HAS_ACCEPTABLE_FORTIFY
-- Performing Test HAS_ACCEPTABLE_FORTIFY - Success
-- Performing Test HAS_FSTACK_PROTECTOR_STRONG_FLAG
-- Performing Test HAS_FSTACK_PROTECTOR_STRONG_FLAG - Failed
-- Performing Test HAS_FSTACK_PROTECTOR_FLAG
-- Performing Test HAS_FSTACK_PROTECTOR_FLAG - Success
-- Performing Test HAS_DIAG_COLOR_FLAG
-- Performing Test HAS_DIAG_COLOR_FLAG - Failed
-- Performing Test HAS_OG_FLAG
-- Performing Test HAS_OG_FLAG - Success
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.26") 
-- Looking for dlopen in dl
-- Looking for dlopen in dl - not found
-- Looking for kstat_lookup in kstat
-- Looking for kstat_lookup in kstat - not found
-- Looking for kvm_open in kvm
-- Looking for kvm_open in kvm - not found
-- Looking for gethostbyname in nsl
-- Looking for gethostbyname in nsl - not found
-- Looking for perfstat_cpu in perfstat
-- Looking for perfstat_cpu in perfstat - not found
-- Looking for clock_gettime in rt
-- Looking for clock_gettime in rt - not found
-- Looking for sendfile in sendfile
-- Looking for sendfile in sendfile - not found
CMake Error at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108 (message):
  Could NOT find LibUV (missing: LIBUV_LIBRARY LIBUV_INCLUDE_DIR)
Call Stack (most recent call first):
  /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:315 (_FPHSA_FAILURE_MESSAGE)
  cmake/FindLibUV.cmake:96 (find_package_handle_standard_args)
  CMakeLists.txt:204 (find_package)


-- Configuring incomplete, errors occurred!
See also "/home/gentlefly/nvim/neovim/build-mingw/CMakeFiles/CMakeOutput.log".
See also "/home/gentlefly/nvim/neovim/build-mingw/CMakeFiles/CMakeError.log".

Sorry for my English.

@GentleFly (I know, really late to the party, but couldn't help commenting anyway.)

You're missing libuv. You've got to install it first with your package manager.