Re: Bug in page.h??? Asterisk/Zaptel

On Sun, 2004-11-21 at 23:42 -0500, Dean Anderson wrote:
> I was just trying to build asterisk on aurora 1.0, building the ztdummy 
> module of zaptel as follows:  The error seems to reveal a kernel bug in 
> include/asm/page.h:111:

Not a bug, although I had to ask DaveM about this one. :)

Dave reminded me that "asm("g4")" is C syntax so
we can't use it in assembler core. __ASSEMBLY__ is defined
when the kernel is building a *.S file, and thus assembler.

Remember, sparc kernels us a lot of lovely voodoo. Lets look at your
compiler call:

> kgcc -I/lib/modules/2.4.20-2.3sparccustom/build//include -O6 -m64 
> -DMODULE -D__KERNEL__ -DEXPORT_SYMTAB 
> -I/lib/modules/2.4.20-2.3sparccustom/build//drivers/net -Wall -I. 
> -Wstrict-prototypes -fomit-frame-pointer 
> -I/lib/modules/2.4.20-2.3sparccustom/build//drivers/net/wan -I 
> /lib/modules/2.4.20-2.3sparccustom/build//include 
> -I/lib/modules/2.4.20-2.3sparccustom/build//include/net -DMODVERSIONS 
> -include 
> /lib/modules/2.4.20-2.3sparccustom/build/include/linux/modversions.h  
> -DSTANDALONE_ZAPATA -c ztdummy.c

This might work for x86, but sparc kernels need a lot more love to build
properly. Quoting Ricky Beam:

...if this is on a sparc/sparc64, then a simple "gcc -foo" is NOT going
to work.  The above register warning is a neon sign.  Go build a kernel
and see what options are being used...

sparc64-linux-gcc -Wp,-MD,kernel/.acct.o.d -D__KERNEL__ -Iinclude -Wall
  -Wstrict-prototypes -Wno-trigraphs -O2 -fno-strict-aliasing -fno-common
  -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow -ffixed-g4 -fcall-used
  -g5 -fcall-used-g7 -Wno-sign-compare -Wa,--undeclared-regs -pg -nostdinc
  -iwithprefix include -DKBUILD_BASENAME=acct -DKBUILD_MODNAME=acct -c
  -o kernel/.tmp_acct.o kernel/acct.c

Note the -ffixed-g4 and -fcall-used-g7 (among others.)  Basically, to
get anything to work correctly, one needs to do exactly what the kernel
build process will do; and most of that magic is in the arch/.../Makefile.

hth,

~spot
---
Tom "spot" Callaway <tcallawa(a)redhat*com> LCA, RHCE 
Red Hat Sales Engineer || Aurora Linux Project Leader

"If you are going through hell, keep going."
- Sir Winston Churchill

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