2.8 KiB
Cross Compiling a Host Toolchain
This plugin demonstrates a minimal working toolchain built with MXE to execute on a Windows host.
GCC
make gcc-host MXE_PLUGIN_DIRS=plugins/examples/host-toolchain/
This will run the usual steps to build a cross-compiler, then build a
second pass to cross-compile the basic toolchain (binutils and gcc).
Once complete, copy usr/{target} to an appropriate Windows machine
and execute the usr\{target}\bin\test-gcc-host.bat batch file. This
builds and runs the libgomp test as a sanity check. The cross and host
built programs should be identical (after stripping), confirmed with the
final step:
>fc /b test-gcc-host.exe test-pthreads-libgomp.exe
Comparing files test-gcc-host.exe and TEST-PTHREADS-LIBGOMP.EXE
FC: no differences encountered
CMake
make cmake-host MXE_PLUGIN_DIRS=plugins/examples/host-toolchain/
CMake defaults to Visual Studio generators and additional configuration is
required for MinGW or MSYS Makefiles. MinGW uses cmd.exe
and requires mingw32-make, MSYS uses make and requires /bin/sh. The
latter is recommended for further investigation since it's closest to the
normal environment MXE expects. See the following projects for shells and
terminal emulators:
- MSYS2
- Git for Windows - uses MSYS2
- ConEmu - usable terminal
- cmder - bundles ConEmu and Git
Make
make make-host MXE_PLUGIN_DIRS=plugins/examples/host-toolchain/
This will cross-compile GNU Make from source (without guile support).
pkgconf/pkg-config
make pkgconf-host MXE_PLUGIN_DIRS=plugins/examples/host-toolchain/
This will cross-compile pkgconf and create the pkg-config wrapper. The
wrapper requires /bin/sh so one of the MSYS2 options should be used.
Run the usr/{target}/bin/test-pkgconf-host script to build libffi test
with non-standard include paths.
Qt5 tools (qmake.exe, rcc.exe, etc.)
make qt5-host-tools MXE_PLUGIN_DIRS=plugins/examples/host-toolchain/
This will build qtbase and cross-compile the toolchain/qt tools/make
On a windows machine, execute
usr\{target}\qt5\test-qt5-host-tools\test-qt5-host-tools.bat to build and
confirm the normal qt test with the cross-compiled qtbase libraries.
Why?
Simply for curiosity, it's hard to see a practical use for this. Certainly, attempting to use it as a way to bootstrap MXE on Windows would strain one's sanity and cross-compiling is the recommended way (even if that means running a Linux VM on Windows).