cross compile on linux with mingw fails if midnight commander is installed.

Building on Linux, and targeting windows fails because `compile.mc` picks up `/usr/bin/mc` (midnight commander), and confuses it for [mc.exe](https://docs.microsoft.com/en-us/windows/win32/wes/message-compiler--mc-exe-)

You can work around by renaming the midnight-commander binary.
Then the compile works fine.

Compiling with conan.

command -
```bash
conan install .. --profile=mingw-w64-i686 --build missing
```

conanfile.txt
```
[requires]
boost/1.74.0

[generators]
cmake
```

~/.conan/profiles/mingw-w64-i686
```
toolchain=/usr/i686-w64-mingw32 # Adjust this path
target_host=i686-w64-mingw32
cc_compiler=gcc
cxx_compiler=g++

[env]
CONAN_CMAKE_FIND_ROOT_PATH=$toolchain # Optional, for CMake to find things in that folder
CONAN_CMAKE_SYSROOT=$toolchain # Optional, if we want to define sysroot
CHOST=$target_host
AR=$target_host-ar
AS=$target_host-as
RANLIB=$target_host-ranlib
CC=$target_host-$cc_compiler
CXX=$target_host-$cxx_compiler
STRIP=$target_host-strip
RC=$target_host-windres

[settings]
# We are cross-building to Windows
os=Windows
arch=x86
compiler=gcc

# Adjust to the gcc version of your MinGW package
compiler.version=10
compiler.libcxx=libstdc++11
build_type=Release
```

```bash
~/.../boost_user/build >>> i686-w64-mingw32-gcc -v

Using built-in specs.
COLLECT_GCC=i686-w64-mingw32-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-w64-mingw32/10.2.0/lto-wrapper
Target: i686-w64-mingw32
Configured with: /build/mingw-w64-gcc/src/gcc/configure --prefix=/usr --libexecdir=/usr/lib --target=i686-w64-mingw32 --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,lto,c++,ada,objc,obj-c++,fortran --enable-shared --enable-static --enable-threads=posix --enable-fully-dynamic-string --enable-libstdcxx-time=yes --enable-libstdcxx-filesystem-ts=yes --with-system-zlib --enable-cloog-backend=isl --enable-lto --enable-libgomp --disable-multilib --enable-checking=release --disable-sjlj-exceptions --with-dwarf2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.2.0 (GCC)
```