why recompile the whole kernel?

caefer · Posted: Tue Feb 04, 2003 10:38 am Post subject: why recompile the whole kernel?

hi there,
I am not sure with some options in the kernel configuration, so I want to build several versions of the kernel to test them then. but since I don't change a lot I wonder if it isn't possible to only recompile what I have changed and link what has been untouched?

maybe leave make clean out?

regards
/christian

staked · n00b Joined: 25 Jan 2003 Posts: 15

Just recompiling the changes on their own will not give you a new bzImage, so the options won't be in your kernel.

Operations · n00b Joined: 05 Oct 2002 Posts: 5

If you leave out make clean, it only builds the files that need building (ie. files which haven't been built before, because they weren't enabled in the config)

So to build a new kernel just type 'make dep && make bzImage modules modules_install'

Matje · Posted: Tue Feb 04, 2003 2:18 pm Post subject:

If you don't do make clean, it is possible that your new kernel won't work
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caefer · Posted: Tue Feb 04, 2003 4:02 pm Post subject:

hmm.. but isn't the idea behind c/c++ compiling and linking, that you only need to compile the sources that have changed and link all new and old object files together then?

still wondering
/christian

Operations · n00b Joined: 05 Oct 2002 Posts: 5

There is indeed a slight possibility of compile error if you don't use make clean first. However, in my experience most of the time it works just fine without that. So just leave it out.
In case you do get an error, you can always do a make clean and recompile everything from scratch

caefer · Posted: Tue Feb 04, 2003 4:26 pm Post subject:

ok, I'll try that. :wink:

/christian