BOOST_JSON_STANDALONE results in undefined references to destructors #485
Description
Fedora 33 / GCC 10.2.1 C++20 / Conan Boost 1.75 2d040665a7cb2820e00fe685a77c8169fcc3b764
When compiling with BOOST_JSON_STANDALONE, linker errors appear with an undefined reference to ~value(). As I understand it, there is no need to link libboost_json.a when standalone mode is enabled. I tried to link it as well anyway and the result is the same.
I have been able to trim it down to the following test case:
#include <boost/json.hpp> int main() { boost::json::value v{}; return 0; } It results in the following linker error:
/usr/bin/ld: CMakeFiles/json-standalone.dir/JsonStandalone.cxx.o: in function `main': /root/test-cases/JsonStandalone.cxx:4: undefined reference to `boost::json::standalone::value::~value()' collect2: error: ld returned 1 exit status I have also tried compiling it directly and it results in the same error:
bash-5.0# g++ -std=c++20 -I/root/.conan/data/boost/1.75.0/_/_/package/2d040665a7cb2820e00fe685a77c8169fcc3b764/include -DBOOST_JSON_STANDALONE JsonStandalone.cxx /usr/bin/ld: /tmp/ccDoEwjC.o: in function `main': JsonStandalone.cxx:(.text+0x22): undefined reference to `boost::json::standalone::value::~value()' collect2: error: ld returned 1 exit status