Error: no such instruction: `eor %edx,%r15d,%r15d,ror'

Rusty Dekema rdekema at
Mon Apr 14 14:07:13 UTC 2014

To the best of my knowledge from when I first was trying to build
osmocom-bb, the error you are receiving is a result of gcc for Intel
x86/x86_64 trying to compile ARM code. There is no 'eor' instruction
for x86, which is why you get that error.

When you built the toolchain, you built a copy of gcc that compiles to
the ARM architecture. On your system, this compiler should be located
at /home/arslan/dir/install/bin/arm-elf-gcc. The message about
assuming arm-elf-gcc is inside the current path means your PATH
environment variable, not your current working directory. So, if you
add /home/arslan/dir/install/bin to your path environment variable,
the osmocom-bb build scripts will be able to find arm-elf-gcc there,
and you should not receive that error.

If you are using bash as your shell, you can accomplish this by
issuing the command:

export PATH=$PATH:/home/arslan/dir/install/bin

Rusty D

On Mon, Apr 14, 2014 at 7:46 AM, Ahmad Jan <e10007a at> wrote:
> Hi...
> I m trying to install osmocom-bb using following link:
> First of all i installed the Dependencies for the host.
> Then for target dependencies, i build my own toolchain using following:
> This toolchain building processes ended up saying: "Build complete! Add
> /home/arslan/dir/install/bin to your PATH to make arm-elf-gcc and friends
> accessible directly."
> (i don't know building my own toolchain is necessary or not).
> Then i went back for building osmocom-bb
> There i came across getting and updating the source.
> But in building the source section, what it says is: " Compiling both the
> target and the host code will happen with the following command. It assumes
> that the arm-elf-gcc is inside the current path."
> I didn't understand it as my current path is osmocom-bb and there is no
> arm-elf-gcc
> Can anyone tell me what does it mean?
> Anyways, i just ignored it and went on executing the following command
> cd src/
> make
> So i ended up with an error saying:
> /home/arslan/osmocom-bb/src/target/firmware/include/asm/swab.h:32: Error: no
> such instruction: `eor %edx,%r15d,%r15d,ror'
> make[4]: *** [gsmtap_util.lo] Error 1
> I tried to figure it out from Internet. It really didn't work out.
> M stuck at this point.
> Can anyone help me resolving this problem?

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