On 4/23/19 2:59 PM, Thomas König wrote:
Hi,
there can be an issue with recent gcc where the system-installed "ar"
and "ranlib" commands cannot handle LTO binaries. On compilation, this
manifests itself with error messages claiming that they need extra
plugins.
This can be fixed by using the command line
$ AR=gcc-ar RANLIB=gcc-ranlib ./configure --enable-lto
so it is not a big issue, but it would still be nicer if the configure
script tested the functionality of ar and ranlib itself and would
select the appropriate one accordingly.
This is with R version 3.5.3.
Thanks for the report. What was the version of binutils on the system
with this problem? On my Ubuntu 18.04 I can use the binutils version of
"ar" and "ranlib" with --enable-lto without problems. I read that with
recent binutils (2.25?), the LTO plugin should be loaded automatically,
so one does not have to use the wrappers anymore.
Thanks
Tomas
Regards
Thomas
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