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SubjectRe: posix_types.h error
On Sat, 6 Jan 2001, Richard B. Johnson wrote:

Hi Richard,

> There is an error at line 80 in linux-2.4.0/include/asm/posix_types.h
> which prevents source-code from being compiled using the new C compiler
> that I was forced to install in order to build the new kernel.

Hmm.. line 80 is the last line in the file, an #endif.

What do you mean by 'forced to install..'? gcc-2.95.2, gcc-2.95.2.1
and gcc-2.97 snapshots will build 2.4.0 (minus netfilter empty struct
initialzer glitchies).

> gcc 2.95.3

(Only exists at mdk afaik.. RedHat didn't get enough flak?;)

> Script started on Sat Jan 6 22:16:30 2001
> # cat xxx.c
>
>
> #include <stdio.h>
> #include <stdlib.h>
>
>
> main()
> {
> fd_set x;
>
> FD_ZERO(&x);
> }
>
> # gcc -c -o xxx.o xxx.c
> xxx.c: In function `main':
> xxx.c:11: Invalid `asm' statement:
> xxx.c:11: fixed or forbidden register 2 (cx) was spilled for class CREG.
> # vi /usr/include/asm/posix_types.h
> #ifndef __ARCH_I386_POSIX_TYPES_H
> #define __ARCH_I386_POSIX_TYPES_H
>
>
>
>
>
>
>
>
> [Snipped...]
>
> #define __FD_ZERO(fdsetp) \
>
>
>
>
>
>
>
>
>
>
>
>
> exit
> Script done on Sat Jan 6 22:19:03 2001
>
> Since these inline asm statements no longer use register names, I
> don't know how to fix them. One of life's little mystries is how
> previously readable code got into this shape.

<g> Agreed! That code is terribly unreadable.. down right invisible.

Seriously though, the constraints look fine to me (and the register
name is there in the output constraint). I'd say you have a busted
compiler. None of the named compilers gripe.

#include <linux/types.h>

main()
{
fd_set x;
__FD_ZERO(&x);
}
.file "xxx.c"
.version "01.01"
gcc2_compiled.:
.text
.align 16
.globl main
.type main,@function
main:
pushl %ebp
xorl %eax, %eax
movl %esp, %ebp
pushl %edi
subl $132, %esp
movl $32, %ecx
leal -136(%ebp), %edi
#APP
cld ; rep ; stosl
#NO_APP
addl $132, %esp
popl %edi
popl %ebp
ret
.Lfe1:
.size main,.Lfe1-main
.ident "GCC: (GNU) gcc-2.97 20001225 (experimental)"

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