Re: [lfs-support] Ensuring a generic x86_64 build

[Paul Rogers]

> Paul Rogers wrote:
> >> I noticed this note about GMP:
> >>
> >> "The default settings of GMP produce libraries optimized for the host
> >> processor."
> >>
> >> Using the default configure settings in the summary of build options I
> >> see "Host type: skylake-pc-linux-gnu".  I then see gcc is using
> >> "-mtune=skylake" when compiling the GMP library.  Now if I use
> >> configfsf.guess as mentioned in the LFS book, it will build with "Host
> >> type: x86_64-pc-linux-gnu".  So I've made a note to recompile GMP when
> >> I move it to the older system.
> >
> > Isn't that a PITA?  But check out the "fat" option.
> 
> Not really.  Do you want performance or portability?  The user decides. 
> In this case the default is performance which I, for one, like.

"De gustibus non disputandem", I suppose.  I always go for portability. 
If a box goes "toes-up" I want the ability to pull the drive, put it in
something generally similar, boot and go.  I always keep an old generic
kernel around, "just in case".
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Re: [lfs-support] 8.1-systemd Ch. 8.3 Linux-4.12.7: Error during make?

[Bruce Dubbs]

Hans Malissa wrote:

Hi,

I’m working my way through LFS 8.1-systemd. I got all the way to 8.3.1 
Linux-4.12.7 without any problem, but now I’m stuck during kernel compilation.
After 'make mrproper’ and ‘make menuconfig', I run ‘make'. Compilation runs ok 
for quite some time, but eventually it fails with a message:

...
Setup is 17532 bytes (padded to 17920 bytes).
System is 5281 kB
CRC ed1061fd
Kernel: arch/x86/boot/bzImage is ready (#1)
   Building modules, stage 2.
   MODPOST 3534 modules
ERROR: “__devm_regmap_init_mmio_clk” 
[sound/soc/codecs/snd-soc-msm8916-digital.ko] undefined!
make[1]: *** [scripts/Makefile.modpost:91: __modpost] Error 1
make: *** [Makefile:1217: modules] Error 2

I’ve tried a few times, starting from a clean source every time. I don’t 
understand what’s going wrong here. I was assuming that the .config created 
with ‘make menuconfig’ should work in any case?
I initially created .config by copying the config-file from the host 
distribution (debian), running ‘make oldconfig’, and then adjusting the .config 
to my liking, so it should work on my system. Most likely there are lots and 
lots of modules selected that I don’t really need. This should not be a 
problem, but if it’s some obscure module that I don’t need which causes the 
compile error, then I’d gladly remove it.
Thanks a lot,


Try running 'make defconfig'.  That should give you a generic build.  Then 
start looking at customization.   The dost distro assumes you you be using 
an initrd that we do not use.  It's not a good starting point.


  -- Bruce


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