undefined reference to `std::filesystem::create_directories(std::filesystem::__cxx11::path const&)'

[patrickw99]

I have been trying to compile this with the following version of gcc
gcc version 8.3.0 (Raspbian 8.3.0-6+rpi1)

I have been getting the following error when I compile it. I have compiled it on both linux mint and on the raspberry pi running Raspbian. I get the same error. Do you have any ideas.

g++ -Werror -std=c++17 -DDATADIR=""/usr/local/share"" -o neoleo basic.o cell.o cmd.o convert.o errors.o format.o input.o io-2019.o io-headless.o io-curses.o io-edit.o io-term.o io-utils.o logging.o oleofile.o parser-2019.o ref.o regions.o sheet.o spans.o tbl.o utils.o window.o main.o tests.o value.o -lm -lncurses -ltinfo -lpanel -lform
/usr/bin/ld: logging.o: in function Log::Log()': logging.cc:(.text+0x90): undefined reference to std::filesystem::create_directories(std::filesystem::__cxx11::path const&)'
/usr/bin/ld: logging.o: in function std::filesystem::__cxx11::path::path<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::filesystem::__cxx11::path>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::filesystem::__cxx11::path::format)': logging.cc:(.text._ZNSt10filesystem7__cxx114pathC2INSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES1_EERKT_NS1_6formatE[_ZNSt10filesystem7__cxx114pathC5INSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES1_EERKT_NS1_6formatE]+0x60): undefined reference to std::filesystem::__cxx11::path::_M_split_cmpts()'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:435: neoleo] Error 1

[blippy]

My suspicion is that with an older compiler like 8.3.0, you need to add an extra compile flag like -lstdc++fs (unconfirmed), as they don't implement the full C++17 standard. I will investigate the problem and get back to you.

[blippy]

Here's a fix:

make clean
env LIBS=-lstdc++fs ./configure
make

I'll note these instructions in installation notes. I'm reluctant to incorporate this fix in with configure.ac because I consider the g++ 8.3.0 "outdated". My inclination is therefore to let a maintainer provide tweaks to the system until a more modern compiler is released, whereupon the problem will vanish.

Is that a satisfactory response for you?

[blippy]

The fix works for me. Since there has been no response from original poster, I will close this issue.

[stefanhusmann]

This workaround (LIBS=-lstdc++fs) works for me with gcc 8.4.0 from Arch Linux' community repo.