compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

[Rene Rebe]

Hi all.

When we try to compile the glibc-2.3.1 with gcc-3.2.1 (unpatched
vanilla sources) it fails for optimizations >= pentium2

Here is the error output:

debug-glibc:[signal]# make
(echo '#include <sysdep.h>'; \
 echo 'PSEUDO (__kill, kill, 2)'; \
 echo ' ret'; \
 echo 'PSEUDO_END(__kill)'; \
 echo 'libc_hidden_def (__kill)'; \
 echo 'weak_alias (__kill, kill)'; \
 echo 'libc_hidden_weak (kill)'; \
) | i686-pc-linux-gnu-gcc-3 -c  -I../include -I.  -I.. -I../libio  -I../sysdeps/i386/elf -I../linuxthreads/sysdeps/unix/sysv/linux/i386 -I../linuxthreads/sysdeps/unix/sysv/linux -I../linuxthreads/sysdeps/pthread -I../sysdeps/pthread -I../linuxthreads/sysdeps/unix/sysv -I../linuxthreads/sysdeps/unix -I../linuxthreads/sysdeps/i386/i686 -I../linuxthreads/sysdeps/i386 -I../sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv -I../sysdeps/unix/i386 -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/i386/i686/fpu -I../sysdeps/i386/i686 -I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic  -nostdinc -isystem /rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/tools.cross/lib/gcc-lib/i686-pc-linux-gnu/3.2.1/include -isystem /rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/root/usr/src/linux/include -D_LIBC_REENTRANT -include ../include/libc-symbols.h  -DPIC -DSHARED    -DASSEMBLER  -DGAS_SYNTAX  -x assembler-with-cpp -o kill.os -
{standard input}: Assembler messages:
{standard input}:46: Warning: rest of line ignored; first ignored character is `1'
{standard input}:46: Warning: rest of line ignored; first ignored character is `1'
{standard input}:46: Warning: rest of line ignored; first ignored character is `1'
{standard input}:46: Error: unrecognized symbol type ""
{standard input}:46: Warning: rest of line ignored; first ignored character is `1'
{standard input}:46: Warning: rest of line ignored; first ignored character is `1'
{standard input}:46: Error: junk `.get_pc_thunk.bx' after expression
make: *** [kill.os] Error 1


And here what gcc has after preprocessing:

# 1 "<stdin>"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "../include/libc-symbols.h" 1
# 56 "../include/libc-symbols.h"
# 1 "../config.h" 1
# 57 "../include/libc-symbols.h" 2
# 2 "<command line>" 2
# 1 "<stdin>"
# 1 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 1
# 24 "../sysdeps/unix/sysv/linux/i386/sysdep.h"
# 1 "../sysdeps/unix/i386/sysdep.h" 1
# 19 "../sysdeps/unix/i386/sysdep.h"
# 1 "../sysdeps/unix/sysdep.h" 1
# 19 "../sysdeps/unix/sysdep.h"
# 1 "../sysdeps/generic/sysdep.h" 1
# 20 "../sysdeps/unix/sysdep.h" 2

# 1 "../sysdeps/unix/sysv/linux/sys/syscall.h" 1
# 25 "../sysdeps/unix/sysv/linux/sys/syscall.h"
# 1 "/rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/root/usr/include/asm/unistd.h" 1
# 26 "../sysdeps/unix/sysv/linux/sys/syscall.h" 2
# 22 "../sysdeps/unix/sysdep.h" 2
# 20 "../sysdeps/unix/i386/sysdep.h" 2
# 1 "../sysdeps/i386/sysdep.h" 1
# 20 "../sysdeps/i386/sysdep.h"
# 1 "../sysdeps/generic/sysdep.h" 1
# 21 "../sysdeps/i386/sysdep.h" 2
# 21 "../sysdeps/unix/i386/sysdep.h" 2
# 25 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
# 1 "../sysdeps/generic/bp-sym.h" 1
# 26 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
# 1 "../sysdeps/i386/bp-asm.h" 1
# 27 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
# 1 "../linuxthreads/sysdeps/i386/tls.h" 1
# 23 "../linuxthreads/sysdeps/i386/tls.h"
# 1 "../linuxthreads/sysdeps/i386/i686/pt-machine.h" 1
# 28 "../linuxthreads/sysdeps/i386/i686/pt-machine.h"
# 1 "../sysdeps/unix/sysv/linux/kernel-features.h" 1
# 29 "../linuxthreads/sysdeps/i386/i686/pt-machine.h" 2
# 24 "../linuxthreads/sysdeps/i386/tls.h" 2
# 28 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
# 2 "<stdin>" 2
.text; 1: .stabs "",100,0,0,1b; 1: .stabs "__kill",100,0,0,1b; .globl __kill; .type __kill,@function; .align 1<<4; .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; .stabs "__kill:F(0,1)",36,0,0,__kill; __kill: movl %ebx, %edx; movl 8(%esp), %ecx; movl 8 -4(%esp), %ebx; movl $37, %eax; int $0x80 ; movl %edx, %ebx; cmpl $-4095, %eax; jae 0f; .Lpseudo_end:
 ret
0:pushl %ebx; .section .gnu.linkonce.t. 1 .get_pc_thunk.bx,"ax",@progbits; .globl 1 .get_pc_thunk.bx; .hidden 1 .get_pc_thunk.bx; .type 1 .get_pc_thunk.bx,@function; 1 .get_pc_thunk.bx: movl (%esp), %ebx; ret; .previous; call 1 .get_pc_thunk.bx; addl $_GLOBAL_OFFSET_TABLE_, %ebx; xorl %edx, %edx; subl %eax, %edx; pushl %edx; ; call __errno_location@PLT; ; popl %ecx; popl %ebx; movl %ecx, (%eax); orl $-1, %eax; jmp .Lpseudo_end; .size __kill,.-__kill; 1: .stabs "",36,0,0,1b-__kill;
.globl __GI___kill ; __GI___kill = __kill
.weak kill ; kill = __kill
.globl __GI_kill ; __GI_kill = kill

Is simply the semicolon misplaced, or is there more to fix?

Sincerely
  - René Rebe (ROCK Linux)

--  
René Rebe - Europe/Germany/Berlin
e-mail:   rene.rebe@gmx.net, rene@rocklinux.org
web:      www.rocklinux.org, drocklinux.dyndns.org/rene/

Anyone sending unwanted advertising e-mail to this address will be
charged $25 for network traffic and computing time. By extracting my
address from this message or its header, you agree to these terms.

Re: compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

[Rene Rebe]

Hi again.

Further review:

It is a gcc issue, since a Athlon optimised gcc-3.2.1 is able to
compile the same preprocessed file ...

On: Wed, 08 Jan 2003 02:00:44 +0100 (CET),
    Rene Rebe <rene@rocklinux.org> wrote:
> Hi all.
> 
> When we try to compile the glibc-2.3.1 with gcc-3.2.1 (unpatched
> vanilla sources) it fails for optimizations >= pentium2
> 
> Here is the error output:
> 
> debug-glibc:[signal]# make
> (echo '#include <sysdep.h>'; \
>  echo 'PSEUDO (__kill, kill, 2)'; \
>  echo ' ret'; \
>  echo 'PSEUDO_END(__kill)'; \
>  echo 'libc_hidden_def (__kill)'; \
>  echo 'weak_alias (__kill, kill)'; \
>  echo 'libc_hidden_weak (kill)'; \
> ) | i686-pc-linux-gnu-gcc-3 -c  -I../include -I.  -I.. -I../libio  -I../sysdeps/i386/elf -I../linuxthreads/sysdeps/unix/sysv/linux/i386 -I../linuxthreads/sysdeps/unix/sysv/linux -I../linuxthreads/sysdeps/pthread -I../sysdeps/pthread -I../linuxthreads/sysdeps/unix/sysv -I../linuxthreads/sysdeps/unix -I../linuxthreads/sysdeps/i386/i686 -I../linuxthreads/sysdeps/i386 -I../sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv -I../sysdeps/unix/i386 -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/i386/i686/fpu -I../sysdeps/i386/i686 -I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic  -nostdinc -isystem /rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/tools.cross/lib/gcc-lib/i686-pc-linux-gnu/3.2.1/include -isystem /rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/root/usr/src/linux/include -D_LIBC_REENTRANT -include ../include/libc-symbols.h  -DPIC -DSHARED    -DASSEMBLER  -DGAS_SYNTAX  -x assembler-with-cpp -o kill.os -
> {standard input}: Assembler messages:
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Error: unrecognized symbol type ""
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Error: junk `.get_pc_thunk.bx' after expression
> make: *** [kill.os] Error 1
> 
> 
> And here what gcc has after preprocessing:
> 
> # 1 "<stdin>"
> # 1 "<built-in>"
> # 1 "<command line>"
> # 1 "../include/libc-symbols.h" 1
> # 56 "../include/libc-symbols.h"
> # 1 "../config.h" 1
> # 57 "../include/libc-symbols.h" 2
> # 2 "<command line>" 2
> # 1 "<stdin>"
> # 1 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 1
> # 24 "../sysdeps/unix/sysv/linux/i386/sysdep.h"
> # 1 "../sysdeps/unix/i386/sysdep.h" 1
> # 19 "../sysdeps/unix/i386/sysdep.h"
> # 1 "../sysdeps/unix/sysdep.h" 1
> # 19 "../sysdeps/unix/sysdep.h"
> # 1 "../sysdeps/generic/sysdep.h" 1
> # 20 "../sysdeps/unix/sysdep.h" 2
> 
> # 1 "../sysdeps/unix/sysv/linux/sys/syscall.h" 1
> # 25 "../sysdeps/unix/sysv/linux/sys/syscall.h"
> # 1 "/rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/root/usr/include/asm/unistd.h" 1
> # 26 "../sysdeps/unix/sysv/linux/sys/syscall.h" 2
> # 22 "../sysdeps/unix/sysdep.h" 2
> # 20 "../sysdeps/unix/i386/sysdep.h" 2
> # 1 "../sysdeps/i386/sysdep.h" 1
> # 20 "../sysdeps/i386/sysdep.h"
> # 1 "../sysdeps/generic/sysdep.h" 1
> # 21 "../sysdeps/i386/sysdep.h" 2
> # 21 "../sysdeps/unix/i386/sysdep.h" 2
> # 25 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 1 "../sysdeps/generic/bp-sym.h" 1
> # 26 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 1 "../sysdeps/i386/bp-asm.h" 1
> # 27 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 1 "../linuxthreads/sysdeps/i386/tls.h" 1
> # 23 "../linuxthreads/sysdeps/i386/tls.h"
> # 1 "../linuxthreads/sysdeps/i386/i686/pt-machine.h" 1
> # 28 "../linuxthreads/sysdeps/i386/i686/pt-machine.h"
> # 1 "../sysdeps/unix/sysv/linux/kernel-features.h" 1
> # 29 "../linuxthreads/sysdeps/i386/i686/pt-machine.h" 2
> # 24 "../linuxthreads/sysdeps/i386/tls.h" 2
> # 28 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 2 "<stdin>" 2
> .text; 1: .stabs "",100,0,0,1b; 1: .stabs "__kill",100,0,0,1b; .globl __kill; .type __kill,@function; .align 1<<4; .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; .stabs "__kill:F(0,1)",36,0,0,__kill; __kill: movl %ebx, %edx; movl 8(%esp), %ecx; movl 8 -4(%esp), %ebx; movl $37, %eax; int $0x80 ; movl %edx, %ebx; cmpl $-4095, %eax; jae 0f; .Lpseudo_end:
>  ret
> 0:pushl %ebx; .section .gnu.linkonce.t. 1 .get_pc_thunk.bx,"ax",@progbits; .globl 1 .get_pc_thunk.bx; .hidden 1 .get_pc_thunk.bx; .type 1 .get_pc_thunk.bx,@function; 1 .get_pc_thunk.bx: movl (%esp), %ebx; ret; .previous; call 1 .get_pc_thunk.bx; addl $_GLOBAL_OFFSET_TABLE_, %ebx; xorl %edx, %edx; subl %eax, %edx; pushl %edx; ; call __errno_location@PLT; ; popl %ecx; popl %ebx; movl %ecx, (%eax); orl $-1, %eax; jmp .Lpseudo_end; .size __kill,.-__kill; 1: .stabs "",36,0,0,1b-__kill;
> .globl __GI___kill ; __GI___kill = __kill
> .weak kill ; kill = __kill
> .globl __GI_kill ; __GI_kill = kill
> 
> Is simply the semicolon misplaced, or is there more to fix?
> 
> Sincerely
>   - René Rebe (ROCK Linux)
> 
> --  
> René Rebe - Europe/Germany/Berlin
> e-mail:   rene.rebe@gmx.net, rene@rocklinux.org
> web:      www.rocklinux.org, drocklinux.dyndns.org/rene/
> 
> Anyone sending unwanted advertising e-mail to this address will be
> charged $25 for network traffic and computing time. By extracting my
> address from this message or its header, you agree to these terms.

Re: compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

[Joe Buck]

On Wed, Jan 08, 2003 at 02:00:44AM +0100, Rene Rebe wrote:
> Hi all.
> 
> When we try to compile the glibc-2.3.1 with gcc-3.2.1 (unpatched
> vanilla sources) it fails for optimizations >= pentium2
> 
> Here is the error output:
> 
> debug-glibc:[signal]# make
> (echo '#include <sysdep.h>'; \
>  echo 'PSEUDO (__kill, kill, 2)'; \
>  echo ' ret'; \
>  echo 'PSEUDO_END(__kill)'; \
>  echo 'libc_hidden_def (__kill)'; \
>  echo 'weak_alias (__kill, kill)'; \
>  echo 'libc_hidden_weak (kill)'; \

This might be a glibc bug; see PR 8948.  gcc has had an __i686 macro for
years; searching sysdep.h for __i686 might bring enlightenment.
> ) | i686-pc-linux-gnu-gcc-3 -c  -I../include -I.  -I.. -I../libio  -I../sysdeps/i386/elf -I../linuxthreads/sysdeps/unix/sysv/linux/i386 -I../linuxthreads/sysdeps/unix/sysv/linux -I../linuxthreads/sysdeps/pthread -I../sysdeps/pthread -I../linuxthreads/sysdeps/unix/sysv -I../linuxthreads/sysdeps/unix -I../linuxthreads/sysdeps/i386/i686 -I../linuxthreads/sysdeps/i386 -I../sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv -I../sysdeps/unix/i386 -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/i386/i686/fpu -I../sysdeps/i386/i686 -I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic  -nostdinc -isystem /rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/tools.cross/lib/gcc-lib/i686-pc-linux-gnu/3.2.1/include -isystem /rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/root/usr/src/linux/include -D_LIBC_REENTRANT -include ../include/libc-symbols.h  -DPIC -DSHARED    -DASSEMBLER  -DGAS_SYNTAX  -x assembler-with-cpp -o kill.os -
> {standard input}: Assembler messages:
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Error: unrecognized symbol type ""
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Warning: rest of line ignored; first ignored character is `1'
> {standard input}:46: Error: junk `.get_pc_thunk.bx' after expression
> make: *** [kill.os] Error 1
> 
> 
> And here what gcc has after preprocessing:
> 
> # 1 "<stdin>"
> # 1 "<built-in>"
> # 1 "<command line>"
> # 1 "../include/libc-symbols.h" 1
> # 56 "../include/libc-symbols.h"
> # 1 "../config.h" 1
> # 57 "../include/libc-symbols.h" 2
> # 2 "<command line>" 2
> # 1 "<stdin>"
> # 1 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 1
> # 24 "../sysdeps/unix/sysv/linux/i386/sysdep.h"
> # 1 "../sysdeps/unix/i386/sysdep.h" 1
> # 19 "../sysdeps/unix/i386/sysdep.h"
> # 1 "../sysdeps/unix/sysdep.h" 1
> # 19 "../sysdeps/unix/sysdep.h"
> # 1 "../sysdeps/generic/sysdep.h" 1
> # 20 "../sysdeps/unix/sysdep.h" 2
> 
> # 1 "../sysdeps/unix/sysv/linux/sys/syscall.h" 1
> # 25 "../sysdeps/unix/sysv/linux/sys/syscall.h"
> # 1 "/rock-linux/rock-1.7/build/default-1.7-snapshot-ia32-pentium2-generic-expert/root/usr/include/asm/unistd.h" 1
> # 26 "../sysdeps/unix/sysv/linux/sys/syscall.h" 2
> # 22 "../sysdeps/unix/sysdep.h" 2
> # 20 "../sysdeps/unix/i386/sysdep.h" 2
> # 1 "../sysdeps/i386/sysdep.h" 1
> # 20 "../sysdeps/i386/sysdep.h"
> # 1 "../sysdeps/generic/sysdep.h" 1
> # 21 "../sysdeps/i386/sysdep.h" 2
> # 21 "../sysdeps/unix/i386/sysdep.h" 2
> # 25 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 1 "../sysdeps/generic/bp-sym.h" 1
> # 26 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 1 "../sysdeps/i386/bp-asm.h" 1
> # 27 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 1 "../linuxthreads/sysdeps/i386/tls.h" 1
> # 23 "../linuxthreads/sysdeps/i386/tls.h"
> # 1 "../linuxthreads/sysdeps/i386/i686/pt-machine.h" 1
> # 28 "../linuxthreads/sysdeps/i386/i686/pt-machine.h"
> # 1 "../sysdeps/unix/sysv/linux/kernel-features.h" 1
> # 29 "../linuxthreads/sysdeps/i386/i686/pt-machine.h" 2
> # 24 "../linuxthreads/sysdeps/i386/tls.h" 2
> # 28 "../sysdeps/unix/sysv/linux/i386/sysdep.h" 2
> # 2 "<stdin>" 2
> .text; 1: .stabs "",100,0,0,1b; 1: .stabs "__kill",100,0,0,1b; .globl __kill; .type __kill,@function; .align 1<<4; .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; .stabs "__kill:F(0,1)",36,0,0,__kill; __kill: movl %ebx, %edx; movl 8(%esp), %ecx; movl 8 -4(%esp), %ebx; movl $37, %eax; int $0x80 ; movl %edx, %ebx; cmpl $-4095, %eax; jae 0f; .Lpseudo_end:
>  ret
> 0:pushl %ebx; .section .gnu.linkonce.t. 1 .get_pc_thunk.bx,"ax",@progbits; .globl 1 .get_pc_thunk.bx; .hidden 1 .get_pc_thunk.bx; .type 1 .get_pc_thunk.bx,@function; 1 .get_pc_thunk.bx: movl (%esp), %ebx; ret; .previous; call 1 .get_pc_thunk.bx; addl $_GLOBAL_OFFSET_TABLE_, %ebx; xorl %edx, %edx; subl %eax, %edx; pushl %edx; ; call __errno_location@PLT; ; popl %ecx; popl %ebx; movl %ecx, (%eax); orl $-1, %eax; jmp .Lpseudo_end; .size __kill,.-__kill; 1: .stabs "",36,0,0,1b-__kill;
> .globl __GI___kill ; __GI___kill = __kill
> .weak kill ; kill = __kill
> .globl __GI_kill ; __GI_kill = kill
> 
> Is simply the semicolon misplaced, or is there more to fix?
> 
> Sincerely
>   - René Rebe (ROCK Linux)
> 
> --  
> René Rebe - Europe/Germany/Berlin
> e-mail:   rene.rebe@gmx.net, rene@rocklinux.org
> web:      www.rocklinux.org, drocklinux.dyndns.org/rene/
> 
> Anyone sending unwanted advertising e-mail to this address will be
> charged $25 for network traffic and computing time. By extracting my
> address from this message or its header, you agree to these terms.

-- 
Q. What's more of a headache than a bug in a compiler.
A. Bugs in six compilers.  -- Mark Johnson

Re: compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

[Alexandre Oliva]

On Jan  7, 2003, Rene Rebe <rene.rebe@gmx.net> wrote:

> It is a gcc issue, since a Athlon optimised gcc-3.2.1 is able to
> compile the same preprocessed file ...

It's very unlikely to be a GCC issue.  You're feeding GCC an assembly
source file, and it's the assembler that is complaining about ignored
characters.  It could be a problem in the preprocessor, for sure, but
then you'd have to save the preprocessed assembly generated by a
working and broken preprocessor and compare them for the bug report to
be useful.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer

Re: compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

[Joe Buck]

On Jan  7, 2003, Rene Rebe <rene.rebe@gmx.net> wrote:
> 
> > It is a gcc issue, since a Athlon optimised gcc-3.2.1 is able to
> > compile the same preprocessed file ...

... meaning that you should look at code that is #ifdefed out on the
Athlon.  This *is* sysdep.h, after all.

On Wed, Jan 08, 2003 at 03:35:46PM -0200, Alexandre Oliva wrote:
> It's very unlikely to be a GCC issue.  You're feeding GCC an assembly
> source file, and it's the assembler that is complaining about ignored
> characters.  It could be a problem in the preprocessor, for sure, but
> then you'd have to save the preprocessed assembly generated by a
> working and broken preprocessor and compare them for the bug report to
> be useful.

Grep for __i686 in the input to GCC, then note that __i686 is a macro.

Re: compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

[Richard Henderson]

On Wed, Jan 08, 2003 at 02:44:49AM +0100, Rene Rebe wrote:
> It is a gcc issue, since a Athlon optimised gcc-3.2.1 is able to
> compile the same preprocessed file ...

No it isn't.  

The problem is that when optimizing for i686, you'll find that
the moral equivalent to

#define i686 1

is in scope, and that one of the sysdep macros is using that
symbol, and *not* expecting it to be defined to anything.


r~

Re: compiling glibc-2.3.1 with gcc-3.2.1 for pentium >= II

[Rene Rebe]

Hi.

Yes - thanks. We already found out and a quick fix is:

+/* __i686 is used in assembler code below as normal text within a statement.
+   When optimizing for pentium2 or pentium3, gcc defines __i686 as cpp macro
+   which destroys the code below. Glibc is only using the cpp macro __i686__,
+   so we can savely undefine __i686 here. - Clifford Wolf */
+#undef __i686

Clifford, have you  already sent the mail to glibc-bugs mailing-list?

On: Wed, 8 Jan 2003 12:28:14 -0800,
    Joe Buck <jbuck@synopsys.com> wrote:
> 
> On Jan  7, 2003, Rene Rebe <rene.rebe@gmx.net> wrote:
> > 
> > > It is a gcc issue, since a Athlon optimised gcc-3.2.1 is able to
> > > compile the same preprocessed file ...
> 
> ... meaning that you should look at code that is #ifdefed out on the
> Athlon.  This *is* sysdep.h, after all.
> 
> On Wed, Jan 08, 2003 at 03:35:46PM -0200, Alexandre Oliva wrote:
> > It's very unlikely to be a GCC issue.  You're feeding GCC an assembly
> > source file, and it's the assembler that is complaining about ignored
> > characters.  It could be a problem in the preprocessor, for sure, but
> > then you'd have to save the preprocessed assembly generated by a
> > working and broken preprocessor and compare them for the bug report to
> > be useful.
> 
> Grep for __i686 in the input to GCC, then note that __i686 is a macro.
> 

- René

--  
René Rebe - Europe/Germany/Berlin
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