> For sopt, the build fails with the logs same as what Ole sharedearlier - but > looking at them, it seems that spdlog is probably not responsible for the > failure.
By same logs, I do not mean the one in the original bug report, but the logs which Ole got after workaround: #953855 cd /build/sopt-3.0.1/obj-x86_64-linux-gnu/cpp/tests && /usr/bin/cmake -E cmake_link_script CMakeFiles/test_padmm.dir/link.txt --verbose=1 /usr/lib/ccache/c++ -g -O2 -fdebug-prefix-map=/build/sopt-3.0.1=. -fstack-protector-strong -Wformat -Werror=format-security -DSPDLOG_FMT_EXTERNAL -Wdate-time -D_FORTIFY_SOURCE=2 -std=gnu++11 -Wl,-z,relro > /usr/bin/ld: CMakeFiles/copy_tiff.dir/copy_tiff.cc.o: in function `fmt::v6::basic_format_context<std::back_insert_iterator<fmt::v6::internal::buffer<char> >, char>::on_error(char const*)': /usr/include/fmt/core.h:1169: undefined reference to `fmt::v6::internal::error_handler::on_error(char const*)' Here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=956694#10 I suspect this is due to a missing flag like I said earlier. Regards, Nilesh
