[Rd] configure script issue with -flto with recent gcc and system ar/ranlib

Thomas König tk @end|ng |rom tkoen|g@net
Tue Apr 23 14:59:02 CEST 2019


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

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.



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