Re: [PATCH v2] i686: Fix multiple definitions of __memmove_chk and __memset_chk

[Florian Weimer <fweimer@redhat.com>]

* Gabi Falk:

> Commit c73c96a4a1af1326df7f96eec58209e1e04066d8 updated memcpy.S and
> mempcpy.S, but omitted memmove.S and memset.S.  As a result, the
> static library built contains two definitions for each of the
> __memmove_chk and __memset_chk symbols.
>
> /usr/lib/gcc/i686-pc-linux-gnu/14/../../../../i686-pc-linux-gnu/bin/ld: /usr/lib/gcc/i686-pc-linux-gnu/14/../../../../lib/libc.a(memset-ia32.o): in function `__memset_chk':
> /var/tmp/portage/sys-libs/glibc-2.39-r3/work/glibc-2.39/string/../sysdeps/i386/i686/memset.S:32: multiple definition of `__memset_chk'; /usr/lib/gcc/i686-pc-linux-gnu/14/../../../../lib/libc.a(memset_chk.o):/var/tmp/portage/sys-libs/glibc-2.39-r3/work/glibc-2.39/debug/../sysdeps/i386/i686/multiarch/memset_chk.c:24: first defined here

> diff --git a/Makefile b/Makefile
> index 7052b46df8..2e351c0321 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -577,6 +577,13 @@ $(objpfx)lint-makefiles.out: scripts/lint-makefiles.sh
>  	$(SHELL) $< "$(PYTHON)" `pwd` > $@ ; \
>  	$(evaluate-test)
>
> +# Link libc.a as a whole to verify that it does not contain multiple
> +# definitions of any symbols.
> +tests-special += $(objpfx)link-static-libc.out
> +$(objpfx)link-static-libc.out:
> +	$(LINK.o) $(whole-archive) -r $(objpfx)libc.a -o /dev/null > $@ 2>&1; \
> +	$(evaluate-test)
> +

I do like the new test, but it still fails on i586-linux-gnu (as defined
by scripts/build-many-glibs.py):

/home/bmg/install/compilers/x86_64-linux-gnu/lib/gcc/x86_64-glibc-linux-gnu/13.2.1/../../../../x86_64-glibc-linux-gnu/bin/ld: /home/bmg/build/glibcs/i586-linux-gnu/glibc/libc.a(memcpy_chk.o): in function `__memcpy_chk':
/home/bmg/src/glibc/debug/../sysdeps/i386/memcpy_chk.S:29: multiple definition of `__memcpy_chk'; /home/bmg/build/glibcs/i586-linux-gnu/glibc/libc.a(memcpy.o):/home/bmg/src/glibc/string/../sysdeps/i386/i586/memcpy.S:31: first defined here
/home/bmg/install/compilers/x86_64-linux-gnu/lib/gcc/x86_64-glibc-linux-gnu/13.2.1/../../../../x86_64-glibc-linux-gnu/bin/ld: /home/bmg/build/glibcs/i586-linux-gnu/glibc/libc.a(mempcpy_chk.o): in function `__mempcpy_chk':
/home/bmg/src/glibc/debug/../sysdeps/i386/mempcpy_chk.S:28: multiple definition of `__mempcpy_chk'; /home/bmg/build/glibcs/i586-linux-gnu/glibc/libc.a(mempcpy.o):/home/bmg/src/glibc/string/../sysdeps/i386/i586/memcpy.S:31: first defined here

Florian