“CPU you selected does not support x86-64 instruction set” error on Cygwin-x64

Question

I\'m trying to install openssl in cygwin by following these instructions: I dowloaded the latest tarball from this site http://www.openssl.org/source/, and put it in C:\\cyg

Answer 1

It would seem that 1.0.1 does not have support for Cygwin/x64.

This thread indicates that the necessary patches have been pulled into the 1.0.2 branch.

Answer 2

Here's a "mee too" answer because things have changed a bit. Cygwin-x64 support was cut-in in May 2015 under Issue 3110: Adding support for x86_64 Cygwin.

However, config still selects the i686 version of the library to build. Also see Issue #4326: Failed to configure for Cygwin-x64 in the OpenSSL bug tracker.

To build OpenSSL 1.0.2 on Cygwin-x64, you have to use Configure and select the triplet. Below is the soup-to-nuts recipe.

$ curl https://www.openssl.org/source/openssl-1.0.2f.tar.gz -o openssl-1.0.2f.tar.gz
...
$ tar -xzf openssl-1.0.2f.tar.gz
...
$ cd openssl-1.0.2f

Then:

$ ./Configure Cygwin-x86_64 shared no-ssl2 no-ssl3 --openssldir="$HOME/ssl"
...
$ make depend
...
$ make
...
$ make install_sw

install_sw installs the headers in $OPENSSLDIR/include, and the libraries in $OPENSSLDIR/lib. It does not install the man pages.

You then compile and link with:

$ gcc -I "$HOME/ssl/include" test.c -o test.exe "$HOME/ssl/lib/libcrypto.a" "$HOME/ssl/lib/libssl.a"

Linking against libcrypto.a and libssl.a means you avoid library path problems. Things will "just work" for you.

---

Also, if you need this for OpenSSL 1.0.1, then you can copy/paste the triplet's settings from 1.0.2's Configure (from line 613):

$ grep "Cygwin-x86_64" Configure
"Cygwin-x86_64", "gcc:-DTERMIOS -DL_ENDIAN -O3 -Wall:::CYGWIN::SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_UNROLL:${x86_64_asm}:mingw64:dlfcn:cygwin-shared:-D_WINDLL:-shared:.dll.a",

If you want config to "just work" for 1.0.1, then add the following. Be sure the line for Cygwin-x86_64 was added to Configure.

x86_64-*-cygwin) OUT="Cygwin-x86_64" ;;     <== Add this in front of the ones below
*-*-cygwin_pre1.3) OUT="Cygwin-pre1.3" ;;
*-*-cygwin) OUT="Cygwin" ;;

Answer 3

here is one post you can refer to. the basic idea is that specifying -march=x86-64 and avoid using assembly language. assembly language is not as portable as c language.