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References: <bug-35034-11811@http.gcc.gnu.org/bugzilla/>
Subject: [Bug c/35034] assembler errors when building gcc/unwind-*.c at -O0 or -O1
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------- Comment #4 from aldot at gcc dot gnu dot org  2008-01-31 14:47 -------
Smaller testcase:
-----------------------------------
$ cat pr35034-1.c
/* PR 35034 - fails to mangle function names for different TUs.  */
/* { dg-do compile } */
/* { dg-options "-combine -O0" } */
/* { dg-additional-sources pr35034-2.c } */
typedef int int_t;

static void
size_of_encoded_value (void)
{
};
extern int pthread_once (int_t *__once_control,
    void (*__init_routine) (void));
static __typeof(pthread_once) __gthrw_pthread_once __attribute__
((__weakref__("pthread_once")));

-----------------------------------
$ cat pr35034-2.c 
void size_of_encoded_value (void)
{
};
-----------------------------------


Gives with current trunk:
$ gcc-4.3-HEAD pr35034-1.c pr35034-2.c -O0 -c -o foo.o -combine -pipe
{standard input}: Assembler messages:
{standard input}:12: Error: symbol `size_of_encoded_value' is already defined
$ gcc-4.3-HEAD pr35034-1.c pr35034-2.c -O0 -S -o - -combine -pipe
        .file   "pr35034-1.c"
        .text
        .type   size_of_encoded_value, @function
size_of_encoded_value:
        pushl   %ebp
        movl    %esp, %ebp
        popl    %ebp
        ret
        .size   size_of_encoded_value, .-size_of_encoded_value
.globl size_of_encoded_value
        .type   size_of_encoded_value, @function
size_of_encoded_value:
        pushl   %ebp
        movl    %esp, %ebp
        popl    %ebp
        ret
        .size   size_of_encoded_value, .-size_of_encoded_value
        .weakref        __gthrw_pthread_once,pthread_once
        .ident  "GCC: (GNU) 4.3.0 20080131 (experimental)"
        .section        .note.GNU-stack,"",@progbits


-- 

aldot at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build, wrong-code
      Known to fail|                            |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35034