[PATCH] binuitils: Check if AR is usable for LTO build

[H.J. Lu]

On Mon, Jan 11, 2021 at 1:20 PM Alan Modra <amodra@gmail.com> wrote:
>
> On Mon, Jan 11, 2021 at 11:53:15AM -0800, H.J. Lu via Binutils wrote:
> > Check if AR is usable for LTO build with --enable-pgo-build=lto:
> >
> > checking for -plugin option... ar: no operation specified
> > Failed: ar --plugin /usr/gcc-11.0.0-x32/libexec/gcc/x86_64-pc-linux-gnu/11.0.0/liblto_plugin.so rc
> > no
> > configure: error: AR with --plugin and rc is required for LTO build
> >
> > instead of build failure later.
> >
> >       PR binutils/26766
> >       * configure.ac:
> >       * configure: Regenerated.
>
> See pr27173 too.  The problem isn't a matter of finding an "ar" that
> supports --plugin, we have versions of GNU ar (2.30 to 2.32?) that
> accept --plugin but then don't parse the "rc" or other command
> options.  I don't think this patch will help.

PR 27173 patches are at

https://sourceware.org/pipermail/binutils/2021-January/114879.html

-- 
H.J.