prefix=/data/mxe/usr/x86_64-w64-mingw32.shared.all
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
toolexeclibdir=${libdir}
includedir=${prefix}/include

Name: libffi
Description: Library supporting Foreign Function Interfaces
Version: 3.4.6
Libs: -L${toolexeclibdir} -lffi
Cflags: -I${includedir}