title: OpenSSL: Nmake fatal error U1077: 'ias' : return code '0x1'
body: <p>I'm trying to set up OpenSSL on Windows 10 64-bit, having followed the instructions so far, after installing Visual Studio I attempted to nmake in the openssl directory using Visual c++ 2008 command prompt to get the following error:</p>
  
  <pre><code> "C:\Strawberry\perl\bin\perl.exe" "-I." -Mconfigdata "util\dofile.pl"  "-omakefile" "crypto\include\internal\bn_conf.h.in" &gt; crypto\include\internal\bn_conf.h
          "C:\Strawberry\perl\bin\perl.exe" "-I." -Mconfigdata "util\dofile.pl"  "-omakefile" "crypto\include\internal\dso_conf.h.in" &gt; crypto\include\internal\dso_conf.h
          "C:\Strawberry\perl\bin\perl.exe" "-I." -Mconfigdata "util\dofile.pl"  "-omakefile" "include\openssl\opensslconf.h.in" &gt; include\openssl\opensslconf.h
          ias -d debug -ocrypto\aes\aes-ia64.obj "crypto\aes\aes-ia64.asm"
  'ias' is not recognized as an internal or external command,
  operable program or batch file.
  NMAKE : fatal error U1077: 'ias' : return code '0x1'
  Stop.
  </code></pre>
  
  <p>This error is different if I try to compile the 32 bit version. That results in an error referencing NASM which |I tried to install with no luck.</p>
  
  <p>Can anybody suggest a solution?</p>
  
  <p>Thank you for taking the time to read my question.</p>