Windows 64bit build

[jbrantly]

I'm trying to build a 64bit version of libsodium for Windows. I have so far been unsuccessful and wanted to make sure this was a supported scenario.

I'm using Windows 7 64bit. I have downloaded various mingw-w64 toolchains (in particular rubenvb's personal build, Mingw-builds, and TDM-GCC) along with MSYS and built numerous versions using various options which have all failed. By "fail" I mean "make check" fails all tests and my application which uses the library crashes when calling "crypto_secretbox" (but succeeds on some other, simpler calls such as sodium_init, sodium_version_string, crypto_secretbox_keybytes, etc).

I believe configure should be something along the lines of:
./configure --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 CFLAGS="-march=x86-64 -mtune=generic"

Is a 64bit Windows build a supported scenario? Has anyone else been able to do this successfully?

[sneves]

I have been able to reproduce this. Generally, failed tests seem to be a build system problem; compiling them manually and running them seems to work fine (i.e., they pass). I haven't figured out yet what exactly in the build system makes the binaries fail.

I have also been able to reproduce the crypto_secretbox crash. This is due to the inclusion of the amd64_xmm6 optimized Salsa20 assembly implementation, which assumes the usual AMD64 ABI. On Windows the parameter transfer registers are not the same, and thus the crash. You can get around this by passing --disable-asm to configure script.

[jbrantly]

Passing --disable-asm to the configure script did work for me. Thank you very much!

Going to leave this issue open since I'm assuming the intent is for this to work out-of-the-box. I would love to contribute but I'm afraid this is not my area of expertise.

[jedisct1]

Hello,
I'm going to take a look. Glad that --disable-asm works around it, but yes, the intent is that it should work out of the box.
Thanks again for reporting this!

[neheb]

I tried this using the MinGW toolchain from cygwin's installer and for me, it hangs at

CCAS crypto_stream/salsa20/amd64_xmm6/stream_salsa20_amd64_xmm6.lo
CCLD libsodium.la

[jedisct1]

Hi Neheb
Was that with mingw64, too?
Use ./configure --disable-asm for now. I'll see how to work around this.

[neheb]

It was mingw64 indeed. On further inspection, this looks like a separate issue. For me, the CCLD line is hanging for some reason. Even if I add --disable-asm, it hangs. My full configure line is "./configure --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --disable-asm". I also use make without -j#.

Note that regular cygwin compiles that use cygwin1.dll work fine.

[jedisct1]

Looks like --disable-pie is required when using the latest mingw-builds. Not with other mingw64 distributions. What a mess...

[neheb]

You might also want to disable asm for cygwin64 as well. make check output:

../../test-driver: line 95: 6000 Segmentation fault (core dumped) "$@" > $log_file 2>&1
FAIL: box7.exe
../../test-driver: line 95: 2468 Segmentation fault (core dumped) "$@" > $log_file 2>&1
FAIL: box8.exe

it also hangs on secretbox2.

[jedisct1]

What is host_os for cygwin64? cygwin64?

[neheb]

that should be it.

edit: hmmm nevermind?

$ grep host_os < Makefile
host_os = cygwin

after ./configure

[jedisct1]

Can you check in config.log? config.guess doesn't seem to mention it. Checking host is probably safer, though.

[neheb]

host='x86_64-unknown-cygwin'
host_alias=''
host_cpu='x86_64'
host_os='cygwin'
host_vendor='unknown'

[jedisct1]

Thanks!

38d0a4d should do the trick.