Cross compiling for Win10 (Yubikey) about pkcs11

[netmiller]

OK, tried to move my devtools to Win10 (at least to get it compiled). After that I will come back to cross-compiling which seems to be tricky enough (for me).

But installing in Windows I've got also errors :

C:\Users\esa\devel\u2f>go get github.com/miekg/pkcs11
# github.com/miekg/pkcs11
src\github.com\miekg\pkcs11\pkcs11.go:26:18: fatal error: ltdl.h: No such file or directory
compilation terminated.

Then I found some help from SO-answers, and downloaded libtool-1.5.26-lib.zip and copied ltdl.h to my toolchain include dir (TDM-GCC-64). But next error :

C:\Users\esa\devel\u2f>go get github.com/miekg/pkcs11
# github.com/miekg/pkcs11
C:/TDM-GCC-64/bin/../lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lltdl
C:/TDM-GCC-64/bin/../lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lltdl
collect2.exe: error: ld returned 1 exit status

So, what else do I have? Maybe missing still something.

Does it have something to do with cgo flags :

/*
#cgo windows CFLAGS: -DREPACK_STRUCTURES
#cgo windows LDFLAGS: -Wl,--no-as-needed -lltdl
#cgo linux LDFLAGS: -Wl,--no-as-needed -lltdl -ldl
#cgo darwin CFLAGS: -I/usr/local/share/libtool
#cgo darwin LDFLAGS: -lltdl -L/usr/local/lib/ -I/usr/local/share/libtool
#cgo openbsd CFLAGS: -I/usr/local/include/
#cgo openbsd LDFLAGS: -lltdl -L/usr/local/lib/
#cgo LDFLAGS: -lltdl

@miekg @mtharp have you any idea what to do (to get this installed).

Thanks in advise.

[miekg]

Don't know any windows, but:

GOOS=windows GOARCH=amd64 go build -o t5.exe test5.go

Not sure if all deps are cross compile correctly here. What happen with just a go clean and go build i.e. don't specify any Go files

Also we use cgo so cross compiling might harder?

[netmiller]

I tried to get Yubikey:s own dll ( libykcs11-1.dll ) and put it in my ./lib/ dir.
Then changed source code:

// p := pkcs11.New("./lib/libykcs11.dylib")
p := pkcs11.New("./lib/libykcs11-1.dll")

so building should at least find valid .dll (works on Win).
But it throws same errors: ( I'm still in Osx env )

► iMac@pkcs11$ GOOS=windows GOARCH=amd64 go build -o t5.exe test5.go
# command-line-arguments
./test5.go:14:7: undefined: pkcs11.New

I have not enough experience compiling and cross-compiling !! So it was just a "brief try".

Do you think it has possibility to work if moving whole building-phase under Windows-env.
I must figure out what I'm missing in my toolchain (Windows), but is it worth to try.

I found also tool called gonative (https://github.com/inconshreveable/gonative).
But it seems a bit old, and I'm not sure if it might help??

Also some article https://inconshreveable.com/04-30-2014/cross-compiling-golang-programs-with-native-libraries/.

OK, maybe I will try pure Win-env for building, if you don't find anything to try within osx ?
Or do you think it doesn't help??

[netmiller]

What about tool called gox ( https://github.com/mitchellh/gox ) ??
Not tried yet, but seems up-to-date tool; is it worth trying?

[miekg]

Just the Go tool chain should be enough to cross build even with cgo (provided you have the libraries and headers installed).

[netmiller]

Maybe not, you are right. What libs and headers do you mean (just remember I'm quite newbie with Go and C).

[netmiller]

Can you figure where I have to locate header files (ykpiv.h).

And should I have win_dll (libykcs11-1.dll) in my building env or is it needed just when running in windows?

Can it be some cgo flag which I'm missing (CGO_CFLAGS or CGO_LDFLAGS).

[mtharp]

I've had luck using xgo https://github.com/karalabe/xgo (requires docker)

Example:
xgo --targets windows/amd64 --deps=http://mirror.clarkson.edu/gnu/libtool/libtool-2.4.6.tar.gz --ldflags '-extldflags -static' .

[kaaposc]

@netmiller try xgo. Here's what worked for me:

1. put your package in $GOPATH/src (I tried from other place and xgo failed with can't load package: package .: no Go files in /)
2. cd into $GOPATH/src/yourpackage
3. xgo --deps="http://ftpmirror.gnu.org/libtool/libtool-2.4.6.tar.gz" --targets windows/amd64 . (I need only win64)

[CsterKuroi]

@netmiller same problem

[crackcomm]

Seems to work when compiled from msys2 terminal.

[shrirangrk]

@netmiller were you able to get a solution for this?