kgcc vs. gcc

kgcc vs. gcc

[Watson, Keith]

Hi,

I had heard that under RH7.0 I needed to compile using kgcc instead of gcc.
Ok, next question, "How?". From reading the kernel docs I have come up with
the following procedure:

make clean	(just to be safe)
make mkproper
make oldconfig
make dep bzImage install >/usr/src/install.log

It is my assumtion that this defaults to gcc. How do I use kgcc? Any
suggestions?

Keith

Re: kgcc vs. gcc

[A. R. Vener]

Edit the makefile. There is probably a line similar to:

CC = gcc

TO use another compiler just replace the name or path of gcc.

Caveeats:
1.  YOu must actually have a copy of kgcc installed on your system.
2. Compiler flags may differ and you may need to edit the definition
  for compiler flag options. 


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> 
> Hi,
> 
> I had heard that under RH7.0 I needed to compile using kgcc instead of gcc.
> Ok, next question, "How?". From reading the kernel docs I have come up with
> the following procedure:
> 
> make clean	(just to be safe)
> make mkproper
> make oldconfig
> make dep bzImage install >/usr/src/install.log
> 
> It is my assumtion that this defaults to gcc. How do I use kgcc? Any
> suggestions?
> 
> Keith
> 
> 
> 
> _______________________________________________
> Blinux-list mailing list
> Blinux-list@redhat.com
> https://listman.redhat.com/mailman/listinfo/blinux-list
> 

Re: kgcc vs. gcc

[xander]

  > Hi,
  > 
  > I had heard that under RH7.0 I needed to compile using kgcc instead of gcc.
  > Ok, next question, "How?". From reading the kernel docs I have come up with
  > the following procedure:
  > 
  > make clean	(just to be safe)
  > make mkproper
  > make oldconfig
  > make dep bzImage install >/usr/src/install.log
  > 
  > It is my assumtion that this defaults to gcc. How do I use kgcc? Any
  > suggestions?

The problem is that Redhat 7.0 is shipped with gcc 2.96. The linux kernel
doesn't compile correctly with this version of gcc. Hence, you need an
older version of gcc/binutils (preferably gcc 2.95.x). I do not know if
this is available with the compat-egcs-blabla packages.

I compiled 2.95.2 and binutils with the distributed RH7 gcc/binutils
packages, installed them in /usr/local, removed the RH7 gcc/binutils
packages and compiled the kernel. A bit of a hassle. I only needed 2.95
for the kernel, so I tossed it away after the succesfull compile, install
and reboot.


Good luck,
xander