Missing elf.h on Windows

Problem: When building a recent Linux kernel on Cygwin, compilation fails because of a missing elf.h file:

$ make ARCH=i386 CROSS_COMPILE=i686-linux-
>>   CHK     include/linux/version.h
>>   SPLIT   include/linux/autoconf.h -> include/config/*
>>   HOSTCC  scripts/basic/fixdep
>>   HOSTCC  scripts/basic/split-include
>>   HOSTCC  scripts/basic/docproc
>>   HOSTCC  scripts/mod/mk_elfconfig
>> scripts/mod/mk_elfconfig.c:4:17: elf.h: \
   No such file or directory

Cause: Versions of Cygwin earlier than 1.5.19 do not include the elf.h file necessary for building recent Linux kernels.

Solution: Add the attached elf.h file to /usr/include. You will need to remove the .txt extension from the file name.