title: How can I build dropbear in Cygwin? (or how can I convert my OpenSSH keys to dropbear)?
body: <p>I'm trying to build dropbear in Cygwin.
  I've downloaded the tar and extracted it but I'm unsure what to do next so would appreciate some help.</p>
  
  <p>Alternatively, is there any way I can convert my existing OpenSSH keys to dropbear format?</p>
  
  <p>Thanks</p>
  
  <p>EDIT:
  here's some additional info:</p>
  
  <pre><code> $ cd dropbear-2013.58
   $ ./configure
      make
      checking for gcc... gcc
      checking whether the C compiler works... yes
      checking for C compiler default output file name... a.exe
      checking for suffix of executables... .exe
      checking whether we are cross compiling... no
      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 ISO C89... none needed
      checking whether make sets $(MAKE)... yes
      configure: No $CFLAGS set... using "-Os -W -Wall" for GCC
      checking for special C compiler options needed for large files... no
      checking for _FILE_OFFSET_BITS value needed for large files... no
      checking build system type... i686-pc-cygwin
      checking host system type... i686-pc-cygwin
      checking for ar... ar
      checking for ranlib... ranlib
      checking for strip... strip
      checking for install... install
      checking how to run the C preprocessor... gcc -E
      checking for grep that handles long lines and -e... /usr/bin/grep
      checking for egrep... /usr/bin/grep -E
      checking for ANSI C header files... yes
      checking for sys/types.h... yes
      checking for sys/stat.h... yes
      checking for stdlib.h... yes
      checking for string.h... yes
      checking for memory.h... yes
      checking for strings.h... yes
      checking for inttypes.h... yes
      checking for stdint.h... yes
      checking for unistd.h... yes
      checking whether __UCLIBC__ is declared... no
      checking for crypt in -lcrypt... yes
      checking for deflate in -lz... no
      configure: error: *** zlib missing - install first or check config.log ***
  </code></pre>
  
  <p>mingw64-i686-zlib.lst
  mingw-zlib-devel.lst
  mingw-zlib1.lst
  zlib0.lst
  are all installed so I'm not sure where the problem lies?</p>