# How to do cross-compiling using MinGW?

## 1. Prepare a pkg-config wrapper

- Create sysroot for MinGW. For example, create a folder named $HOME/mingw-sysroot

- Create ${CHOST}-pkg-config wrapper. The wrapper will set PKG_CONFIG_SYSROOT_DIR as sysroot.

#!/bin/sh

# Point to your sysroot.
SYSROOT=$HOME/mingw-sysroot

export PKG_CONFIG_DIR=
export PKG_CONFIG_LIBDIR=${SYSROOT}/usr/lib/pkgconfig:${SYSROOT}/usr/share/pkgconfig
export PKG_CONFIG_SYSROOT_DIR=${SYSROOT}

exec pkg-config "$@"

- Export PKG_CONFIG as your wrapper.

export PKG_CONFIG=${CHOST}-pkg-config

## 2. Config with new sysroot.

./configure --host=i686-w64-mingw32 \
            --prefix=/usr \
            --with-sysroot=$HOME/mingw-sysroot

3. Make and install.

make install DESTDIR=$HOME/mingw-sysroot

Reference:
* [Supporting Cross-Compilation](https://autotools.io/pkgconfig/cross-compiling.html?utm_source=www.flameeyes.eu&utm_medium=url&utm_campaign=vanitydomainssite)
* [How to use MinGW to cross compile software for Windows](https://gitlab.kitware.com/cmake/community/wikis/doc/cmake/cross_compiling/Mingw)