I'm trying to port a project to docker and I'm also testing it on my
Raspberry Pi 3B+
when I *./configure* and *make* the project, it fails with this message
gcc: error: unrecognized -mcpu target: armv7l
gcc: note: valid arguments are: arm8 arm810 strongarm [...] cortex-a53 [...]
gcc: error: missing argument to '-march='
lscpu says this:
Architecture: armv7l
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
Vendor ID: ARM
Model: 4
Model name: Cortex-A53
Stepping: r0p4
CPU max MHz: 1200.
CPU min MHz: 600.
BogoMIPS: 38.40
Flags: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4
idiva idi
vt vfpd32 lpae evtstrm crc32
So it seems to me that AC_CANONICAL_HOST sets $host_cpu to armv7l,
although that is the Architecture and should be passed to -march
instead. -mcpu should get the Model name.
I couldn't get it to accept the --host=cpu-os-abi parameter, because
cortex-a35 contains a dash and that seems to confuse autoconf (that
produces the error message Invalid configuration
`cortex-a53-unknown-linux-gnueabihf': machine `cortex-a53-unknown' not
recognized). I did manage to compile with
--host=native-unknown-linux-gnueabihf, but I'd rather not define a fixed
ABI, because that would break the cross-platform compatibility of the
Dockerfile.
I'm using autoconf 2.69 from the docker base image "ubuntu:latest".
