[OpenWrt-Devel] Toolchain for armv7-ar?

[Ajay Garg]

Thanks Karl and Florin for the replies.

Ok, so the first thing I need to understand is OpenWRT is for building
linux(-like) systems (only) for routers .. thanks guys for this clearance.


Florin,

I'll tell you my usecase in a bit of detail.

* We have a framework, with openssl-client code written.
* We port our framework to multiple platforms/devices, and then link
libcrypto.a and libssl.a as and when required.


For the SOC with processor
https://www.digikey.com/product-detail/en/microchip-technology/ATSAM4E8CA-AUR/ATSAM4E8CA-AURCT-ND/4140758,
everything has been done, but we are stuck on integrating openssl due to
being unable to build compatible libcrypto.a and libssl.a for the same.

I almost got things done by tweaking things with the "Freescale i.MX 6"
configuration, but failed when I added the -mthumb option.
Since then, I have been trying all sorts of things, to firstly build a
toolchain (in ubuntu-14.04 host) supporting -mthumb, and then compile
libcrypto.a and libssl.a for the same.

So, if there is a (existing/available) toolchain in openwrt that would
compile for armv7-a with -mthumb, I think all I need to do is go into
packages/libs/openssl, and fire "make -B". Kindly let know if something can
be done for the same.


Once again, thanks everyone for the help so far ... looking forward to
learning more from you experts..


Thanks and Regards,
Ajay


On Thu, Nov 9, 2017 at 2:32 PM, Florin <floring2502 at gmail.com> wrote:

> I've got a toolchain (gcc-4.9.2 + binutils-2.26.1) running on armv7-a and
> ipk packages  compiled with/for it:
>
> floring at huawei:~$ gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/opt/usr/libexec/gcc/arm-linux-gnueabi/
> 4.9.2/lto-wrapper
> Target: arm-linux-gnueabi
> Configured with: ../configure --host=arm-linux-gnueabi
> --target=arm-linux-gnueabi --prefix=/opt/usr --with-gmp=/opt/usr
> --with-mpfr=/opt/usr --with-mpc=/opt/usr --with-isl=/opt/usr
> --with-cloog=/opt/usr --enable-languages=c,c++,go,objc,obj-c++
> --disable-multilib
> LDFLAGS_FOR_TARGET=-Wl,--dynamic-linker=/opt/lib/ld-linux.so.3
> LDFLAGS_FOR_HOST=-Wl,--dynamic-linker=/opt/lib/ld-linux.so.3
> LDFLAGS=-Wl,--dynamic-linker=/opt/lib/ld-linux.so.3
> Thread model: posix
> gcc version 4.9.2 (GCC)
>
> The architecture is a Huawei-ES880 (Cortex A9 without FPU) router running
> Zyxmon's DD-WRT mod for Northstar platforms. I've even been able to compile
> and run Xorg, GTK 2 and 3 and Qt 4.8.2 as optware on it, and I am
> currently
> working on upgrading gcc and "debianize" it. So I kinda run a complete
> linux
> on this architecture.
> I've started it from cross-compiling glibc and gcc and installing them on
> scratch /opt filesystem, and to simplify things I used some of Zyxmon's
> Qnapware (http://qnapware.zyxmon.org/binaries-armv7/); If you only need
> some
> essential packages, this link would be enough.
>
> I am doing it as a hobby, but my problem is that I don't have a large
> traffic subscription so I cannot make it largely public. If you need more
> than the packages in Qnapware, especially the native arm-v7a toolchain,
> then
> I could share my work. Keep in mind that these embedded systems have
> limited
> RAM so you need to setup at least 1GB of swap space and set TMPDIR variable
> on external HDD directory for making all these work.
>
> Florin
>
> > -----Original Message-----
> > From: openwrt-devel [mailto:openwrt-devel-bounces at lists.openwrt.org]
> > On Behalf Of Karl Palsson
> > Sent: Wednesday, November 08, 2017 10:54 PM
> > To: Ajay Garg
> > Cc: openwrt-devel
> > Subject: Re: [OpenWrt-Devel] Toolchain for armv7-ar?
> >
> >
> > That part is armv7-m (not -a, not -r). They don't generally run linux at
> all, so
> > don't have toolchains targetting linux, and don't generally have existing
> > targets in openwrt.
> >
> > You _can_ run linux on them, but it's a farrrr bigger task than just,
> "which
> > toolchain do I need to select in menuconfig"
> >
> > Cheers,
> > Karl P
> >
> > Ajay Garg <ajaygargnsit at gmail.com> wrote:
> > > Experts,
> > >
> > > Waiting for your kind reply/replies.
> > >
> > >
> > > Thanks and Regards,
> > > Ajay
> > >
> > > On 7 Nov 2017 11:22 a.m., "Ajay Garg" <ajaygargnsit at gmail.com>
> > > wrote:
> > >
> > > > Hi All.
> > > >
> > > > I have been trying to build the toolchain+packages (especially
> > > > openssl) using openwrt, but have been unable to do so for a armv7-ar
> > architecture.
> > > >
> > > > The processor on our SOC is
> > > > https://www.digikey.com/product-detail/en/microchip-
> > > > technology/ATSAM4E8CA-AUR/ATSAM4E8CA-AURCT-ND/4140758
> > > >
> > > > So, is there an (already existing) configuration (in "make
> > > > menuconfig", or
> > > > otherwise) that builds everything (toolchain plus packages) for
> armv7-ar?
> > > >
> > > >
> > > > Will be grateful to listen from you experts.
> > > >
> > > >
> > > > Thanks and Regards,
> > > > Ajay
> > > >
> > > _______________________________________________
> > > openwrt-devel mailing list
> > > openwrt-devel at lists.openwrt.org
> > > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
>
>


-- 
Regards,
Ajay
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