$ ./configure --host=mingw32
configure: WARNING: If you wanted to set the --build type, don't use --host.
If a cross compiler is detected then cross compile mode will be used.
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for mingw32-strip... no
checking for strip... strip
checking build system type... i686-pc-cygwin
checking host system type... i386-pc-mingw32
checking for mingw32-gcc... no
checking for gcc... gcc
checking for C compiler default output file name... a.exe
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... .exe
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for a sed that does not truncate output... /usr/bin/sed
checking for egrep... grep -E
checking for ld used by gcc... /usr/i686-pc-cygwin/bin/ld.exe
checking if the linker (/usr/i686-pc-cygwin/bin/ld.exe) is GNU ld... yes
checking for /usr/i686-pc-cygwin/bin/ld.exe option to reload object files... -r
checking for BSD-compatible nm... nm
checking whether ln -s works... yes
checking how to recognise dependent libraries... file_magic file format pei*-i38
6(.*architecture: i386)?
checking how to run the C preprocessor... /lib/cpp
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.