[R-pkg-team] Bug#971109: r-cran-rstan: FTBFS: ld: cannot find /usr/lib/x86_64-linux-gnu: file format not recognized

[Lucas Nussbaum]

Source: r-cran-rstan
Version: 2.21.2-1
Severity: serious
Justification: FTBFS on amd64
Tags: bullseye sid ftbfs
Usertags: ftbfs-20200926 ftbfs-bullseye

Hi,

During a rebuild of all packages in sid, your package failed to build
on amd64.

Relevant part (hopefully):
> g++ -std=gnu++14 -shared -L/usr/lib/R/lib -Wl,-z,relro -o rstan.so Module.o chains.o init.o misc.o pointer-tools.o sparse_extractors.o stan_fit_base.o stan_fit_rccp.o stanc.o stan/lang/ast_def.o stan/lang/grammars/bare_type_grammar_inst.o stan/lang/grammars/block_var_decls_grammar_inst.o stan/lang/grammars/expression07_grammar_inst.o stan/lang/grammars/expression_grammar_inst.o stan/lang/grammars/functions_grammar_inst.o stan/lang/grammars/indexes_grammar_inst.o stan/lang/grammars/local_var_decls_grammar_inst.o stan/lang/grammars/program_grammar_inst.o stan/lang/grammars/semantic_actions_def.o stan/lang/grammars/statement_2_grammar_inst.o stan/lang/grammars/statement_grammar_inst.o stan/lang/grammars/term_grammar_inst.o stan/lang/grammars/whitespace_grammar_inst.o /usr/lib/x86_64-linux-gnu -ltbb -ltbbmalloc -L/usr/lib/R/lib -lR
> /usr/bin/ld: cannot find /usr/lib/x86_64-linux-gnu: file format not recognized
> collect2: error: ld returned 1 exit status

The full build log is available from:
   http://qa-logs.debian.net/2020/09/26/r-cran-rstan_2.21.2-1_unstable.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.