netdev - Re: Crosscompiling iproute2

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Message-ID: <20210517123628.13624eeb@hermes.local>
Date:   Mon, 17 May 2021 12:36:28 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Frank Wunderlich <frank-w@...lic-files.de>
Cc:     netdev@...r.kernel.org
Subject: Re: Crosscompiling iproute2

On Mon, 17 May 2021 09:44:21 +0200
Frank Wunderlich <frank-w@...lic-files.de> wrote:

> > Gesendet: Sonntag, 16. Mai 2021 um 23:17 Uhr
> > Von: "Stephen Hemminger" <stephen@...workplumber.org>  
> 
> > It is possible to mostly do a cross build if you do:
> >
> > $ make CC="$CC" LD="$LD"
> > There are issues with netem local table generation  
> 
> Hi,
> 
> thank you for your answer, but with this way i got this:
> 
> ./normal > normal.dist
> ./normal: error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory
> 
> i guess it's the netem issue you've mentioned, imho i cannot install armhf-libs on ubuntu, so i disabled subdirs in Makefile beginning with netem
> 
> -SUBDIRS=lib ip tc bridge misc netem genl tipc devlink rdma dcb man vdpa
> +SUBDIRS=lib ip tc bridge misc
> +#netem genl tipc devlink rdma dcb man vdpa
> 
> it seems to did it now
> 
> $ file ip/ip
> ip/ip: ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), statically linked, BuildID[sha1]=b36e094bc8681713d91ffe3a085ad4d3c6a1c5ea, for GNU/Linux 3.2.0, not stripped
> 
> thank you
> 
> regards Frank

Cross compile needs to know the compiler for building non-cross tools as well.
This works for me:

make CC="$CC" LD="$LD" HOSTCC=gcc