Hi,
On Sun, Jun 06, 2021 at 11:57:09PM +0100, Sergei Trofimovich via Elfutils-devel
wrote:
> Link failure is reproducible on gcc-11.1.0 target:
>
> ```
> $ autoreconf -i -f
> $ ./configure --enable-maintainer-mode --disable-debuginfod \
> --host=x86_64-pc-linux-gnu \
> CFLAGS=-march=znver3 \
> CXXFLAGS=-march=znver3 \
> LDFLAGS=" "
> $ make
>
> CCLD elflint
> ld: elflint.o: in function `check_attributes':
> elflint.c:(.text+0xdcff): undefined reference to `buffer_left'
> ld: elflint.c:(.text+0xe557): undefined reference to `buffer_left'
> ```
>
> It happens due to possible external linkage of `buffer_left()`.
>
> The change forces local linkkage to always use local definition
> (either inline or out-of-line).
>
> Reported-by: Toralf Förster
> Bug: https://bugs.gentoo.org/794601
> Signed-off-by: Sergei Trofimovich
Fixes: e95d1fbb ("elflint: Pull left() in file scope")
> ---
> src/ChangeLog | 5 +
> src/elflint.c | 2 +-
> 2 files changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/src/ChangeLog b/src/ChangeLog
> index 2c7be185..e030de0d 100644
> --- a/src/ChangeLog
> +++ b/src/ChangeLog
> @@ -1,3 +1,8 @@
> +2021-06-06 Sergei Trofimovich
> +
> + * elflint.c (buffer_left): Mark as 'inline' to avoid external linkage
> + failure.
Did you mean 'static'?
> +
> 2021-05-12 Dmitry V. Levin
>
> * elfcompress.c (process_file): Return 1 instead of -1 in case of an
> diff --git a/src/elflint.c b/src/elflint.c
> index 85cc7833..35b40500 100644
> --- a/src/elflint.c
> +++ b/src/elflint.c
> @@ -3434,7 +3434,7 @@ buffer_pos (Elf_Data *data, const unsigned char *p)
>return p - (const unsigned char *) data->d_buf;
> }
>
> -inline size_t
> +static inline size_t
> buffer_left (Elf_Data *data, const unsigned char *p)
> {
>return (const unsigned char *) data->d_buf + data->d_size - p;
I suppose we could simply replace these 'inline' with 'static'
and let the compiler decide whether to inline or not.
--
ldv
