my kernel headers are hosed!

[Klaus-Peter Schrage]

Net Llama! wrote:
> Seems that I missed the memo long ago that ordered everyone to stop 
> symlinking /usr/include/asm & /usr/include/linux into /usr/src/linux. 
> So, i've continued to do that and now have discovered that its a bad 
> thing because /usr/include/asm & /usr/include/linux should contain the 
> headers used to build my current glibc, rather than the current kernel.
> 
> My current glibc(-2.3.2) was built under kernel 2.4.22, so I thought 
> that I could fix this mess with the following:
> cd /usr/src/linux-2.4.22
> make mrproper
> make include/linux/version.h
> make symlinks
> cp -HR include/asm /usr/include
> cp -R include/asm-generic /usr/include
> cp -R include/linux /usr/include
> touch /usr/include/linux/autoconf.h
> 
> Unfortunately, that hasn't helped at all.  Trying to buld anything that 
> relies on the kernel headers is bombing out with an assortment of bad 
> errors like:
> 
> In file included from /usr/include/sys/wait.h:30,
>                  from xsystem.c:21:
> /usr/include/signal.h:27: error: conflicting types for `sigset_t'
> /usr/include/sys/select.h:38: error: previous declaration of `sigset_t'
> xsystem.c: In function `xsystem':
> xsystem.c:45: error: `errno' undeclared (first use in this function)
> xsystem.c:45: error: (Each undeclared identifier is reported only once
> xsystem.c:45: error: for each function it appears in.)
> make[1]: *** [xsystem.o] Error 1
> 
> 
> Surely there must be a way to fix this mess.  Anyone?

I had a similar issue after I had reinstalled a fresh linux-2.4.23 into 
  /usr/src, nixing the one that was there before.

Nothing wanted to compile 'cause of lacking headers. I restored them by 
a simple 'make xconfig' (perhaps I did a 'make dep' after that, don't 
remember, but no need do a complete recompile ).
Klaus