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Re: Warning: Ignoring changed section attributes for .gnu.warning.sigstack
>>>>> Andreas Schwab writes:
AS> Andreas Jaeger <aj@suse.de> writes:
AS> |> Hi,
AS> |>
AS> |> I've noticed a small problem while compiling glibc and would welcome
AS> |> your input.
AS> |>
AS> |> The appended simple program prints a warning with gcc 2.96 CVS current:
AS> |>
AS> |> $ /opt/gcc-2.96/bin/gcc -Wall -c test-warning.c -save-temps
AS> |> test-warning.s: Assembler messages:
AS> |> test-warning.s:19: Warning: Ignoring changed section attributes for .gnu.warning.sigstack
AS> This is due to a change in the assembler, which has already been discussed
AS> on the binutils list (it also affects the kernel). See
AS> http://sourceware.cygnus.com/ml/binutils/2000-06/msg00091.html for the
AS> head of the thread.
Thanks for the hint. Nick Clifton suggested:
> There is (rather grungy) workaround however - put a comment character
> at the end of the section's name when defining the attribute:
I'm appending a patch which does this and silences the warnings for
me. What do you think? Or is there a better workaround?
Now the assembler output is:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#APP
.section .gnu.warning.sigstack; .previous
#NO_APP
.section .gnu.warning.sigstack
#,"a",@progbits
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Andreas
============================================================
Index: include/libc-symbols.h
--- include/libc-symbols.h 2000/03/31 05:44:26 1.10
+++ include/libc-symbols.h 2000/06/09 12:17:17
@@ -179,7 +179,7 @@
# define link_warning(symbol, msg) \
__make_section_unallocated (".gnu.warning." #symbol) \
static const char __evoke_link_warning_##symbol[] \
- __attribute__ ((section (".gnu.warning." #symbol))) = msg;
+ __attribute__ ((section (".gnu.warning." #symbol "\n\t#"))) = msg;
# else
# define link_warning(symbol, msg) \
asm(".stabs \"" msg "\",30,0,0,0\n" \
--
Andreas Jaeger
SuSE Labs aj@suse.de
private aj@arthur.inka.de