Building OpenSSL

Richard Levitte levitte at
Thu May 28 12:05:27 UTC 2020

On Thu, 28 May 2020 13:20:02 +0200,
Johnny Black wrote:
> Hi, 
> I'm having problems installing openssl.
> I downloaded 1.1.1 version from the website and
> I followed all the instructions but
> when I run the "nmake" command I get an error.
> It says, I quote:
> "ias   -d debug -o crypto\aes\aes-ia64.obj "crypto\aes\aes-ia64.asm"
> "NMAKE : fatal error U1077: 'ias' : return code '0x1'"
> "'ias' is not recognized as an internal or external command"
> Perhaps you might know why I'm getting this error ?
> If so, would you be so kind to provide me with the information to solve this ?
> Thanks in advance.

'ias' is Intel's Itanium assembler, which you must download and
install separately.

The other option is to configure without assembler code; that's done
with the configuration option 'no-asm', so for example:

    perl Configure VC-WIN64I no-asm

Also, just in case you made a mistake and are running on a regular
x86_64 CPU (Intel or AMD, doesn't matter), you should use the config
target 'VC-WIN64A' instead of 'VC-WIN64I'.


Richard Levitte         levitte at
OpenSSL Project

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