Re: [dpdk-dev] Unable to compile DPDK 1.5 on Debian GNU/Linux: lib/librte_eal/linuxapp/igb_uio

[Marc Sune <marc.sune@bisdn.de>]

Dear Thomas,

Thank you that really was the problem. I am still puzzled why it 
happend, since the headers were installed before. I will update the rest 
of installations.

Probably it would be slightly better to check whether the build folder 
contains the right Makefiles and scripts needed to print the right 
error, otherwise the output of make is misleading.

As I said thank you and regards
marc

On 05/11/13 16:42, Cyril Cressent wrote:
> Hi Marc,
>
> On Mon, Nov 04, 2013 at 09:53:29PM +0100, Marc Sune wrote:
>> I think it is not this variable. When the folder
>> /lib/modules/$(shell uname -r)/build does not exist, the Makefile
>> properly warns you (I manually created it, since it was not existing
>> during the first compilation attempt).
> build should be a symlink to the corresponding kernel sources or
> headers, usually in /usr/src/.
>
>> marc@bisdn-dev:~/BISDN/dpdk$ ls /lib/modules/`uname -r`/build
>> marc@bisdn-dev:~/BISDN/dpdk$ ls /lib/modules/`uname -r`/
>> build   modules.alias      modules.builtin      modules.dep
>> modules.devname  modules.softdep  modules.symbols.bin
>> kernel  modules.alias.bin  modules.builtin.bin  modules.dep.bin
>> modules.order    modules.symbols  source
>> marc@bisdn-dev:~/BISDN/dpdk$ ls /lib/modules/`uname -r`/build -la
>> total 8
>> drwxr-xr-x 2 root root 4096 jul 31 16:41 .
>> drwxr-xr-x 4 root root 4096 nov  4 16:43 ..
> That output shows that "build" is not a symlink to the kernel
> sources/headers. Make it a symlink to /usr/src/linux-headers-`uname -r`.
> And double check you have the kernel headers there...
>
>> Concerning kernel headers, the kernel headers for the running kernel
>> were already installed (via apt-get install linux-headers-`uname
>> -r`), and no custom kernel is installed in the system.
> That's weird ; you should have had the symlink properly created if you
> used apt...
>
>> Actually, this seems to me more of a variable definition problem,
>> like the $(wildcard $(RTE_KERNELDIR)) but somehow related to the
>> DPDK target folders, rather than an issue with the headers/gcc,
>> since it is 'make' which is not able to find the existing file. But
>> I could be wrong..
> Yes, the target folder is /lib/modules/`uname -r`/build, which contains
> a Makefile. Yours is empty because it's not the expected symlink, and
> make then complains because there is no Makefile there.