Arch Linux

Description:

After the addition of mandatory stripping of symbols to makepkg in (https://lists.archlinux.org/pipermail/pacman-dev/2021-March/024911.html), the makepkg occasionally produces archives of LTO-compiled object files, in which the linker fails to resolve symbols.

This issue was encountered in the `erlang 24.2-1` package. When built manually without applying the strip command, the produced `libei.a` works fine, and when installing it from the Arch archive, linking with `libei.a` reports unresolved symbols.

See this thread, which discussed this issue: https://github.com/erlang/otp/issues/5609

Perhaps the solution would be to add an option to `makepkg` to exclude given libraries from stripping symbols?

Additional info:
* package version(s): erlang 24.2-1
* config and/or log files etc.

This illustrates that libei.a is stripped:

$ sudo pacman -U https://archive.archlinux.org/packages/e/erlang/erlang-24.2-1-x86_64.pkg.tar.zst
$ du -sb /usr/lib/erlang/usr/lib/libei*
74254 /usr/lib/erlang/usr/lib/libei.a
74254 /usr/lib/erlang/usr/lib/libei_st.a

Linking of a local project with it results in errors:

$ g++ c_src/ei++.o c_src/exec.o c_src/exec_impl.o -lcap -L"/usr/lib/erlang/lib/erl_interface-5.1/lib" -lei -o /home/serge/projects/erl-libs/erlexec/priv/x86_64-pc-linux-gnu/exec-port)
failed with return code 1 and the following output:
/usr/bin/ld: c_src/ei++.o: in function `ei::Serializer::print(std::ostream&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
/home/serge/projects/erl-libs/erlexec/c_src/ei++.cpp:62: undefined reference to `ei_s_print_term'
/usr/bin/ld: c_src/ei++.o: in function `ei::Serializer::read()':
/home/serge/projects/erl-libs/erlexec/c_src/ei++.cpp:145: undefined reference to `ei_decode_version'
/usr/bin/ld: c_src/exec.o: in function `ei::Serializer::decodeTupleSize()':

This works fine when fetching the previous version of the package which doesn't strip symbols from libei.a:

$ sudo pacman -U https://archive.archlinux.org/packages/e/erlang/erlang-24.1.7-1-x86_64.pkg.tar.zst
$ du -sb /usr/lib/erlang/usr/lib/libei*
282530 /usr/lib/erlang/usr/lib/libei.a
278736 /usr/lib/erlang/usr/lib/libei_st.a

* link to upstream bug report, if any

Steps to reproduce:

1. Install latest erlang package
2. Install rebar3:
$ cd /tmp
$ git clone https://github.com/erlang/rebar3.git
$ cd rebar3
$ ./bootstrap
$ PATH=/tmp/rebar3:$PATH

3. Try to build erlexec:
$ git clone https://github.com/saleyn/erlexec.git
$ make