build errors with `_LIBCPP_REMOVE_TRANSITIVE_INCLUDES`

ビルド出力では src/helpers/buffer.cpp が示されており、clang と libc++ でコンパイルしたときに87行目と137行目で std::string の宣言が見つからないことが示されています。まず、このファイルのインクルードと、オプション _LIBCPP_REMOVE_TRANSITIVE_INCLUDES に関するプロジェクトのビルド設定を確認してください。このオプションを指定して報告されたビルドが成功すれば完了です。issue では CI ジョブの検討も提案されています。

FYI, there are some missing includes that are revealed with clang + libc++. It's not too big of a problem, but it might be useful to fix / add ci job.

FAILED: [code=1] src/libpisp.so.1.7.0.p/helpers_buffer.cpp.o 
/usr/bin/ccache clang++ -Isrc/libpisp.so.1.7.0.p -Isrc -I../src -Isrc/libpisp -I../src/libpisp -I/usr/include -fdiagnostics-color=always -D_GLIBCXX_ASSERTIONS=1 -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -D_GLIBCXX_DEBUG=1 -U_LIBCPP_HARDENING_MODE -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG -std=c++20 -O0 -g -DPISP_LOGGING_ENABLE=1 -DBOOST_BIND_GLOBAL_PLACEHOLDERS -Wno-address-of-packed-member -stdlib=libc++ -D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES -fPIC -pthread -DBOOST_LOG_DYN_LINK=1 -DBOOST_LOG_SETUP_DYN_LINK=1 -DBOOST_THREAD_BUILD_DLL=1 -DBOOST_THREAD_USE_DLL=1 -DBOOST_ALL_NO_LIB -MD -MQ src/libpisp.so.1.7.0.p/helpers_buffer.cpp.o -MF src/libpisp.so.1.7.0.p/helpers_buffer.cpp.o.d -o src/libpisp.so.1.7.0.p/helpers_buffer.cpp.o -c ../src/helpers/buffer.cpp
../src/helpers/buffer.cpp:87:52: error: implicit instantiation of undefined template 'std::basic_string<char>'
   87 |                         throw std::runtime_error("Unable to dup fd: " + std::string(strerror(errno)));
      |                                                                         ^
/usr/bin/../include/c++/v1/__fwd/string.h:43:7: note: template is declared here
   43 | class basic_string;
      |       ^
../src/helpers/buffer.cpp:87:50: error: invalid operands to binary expression ('const char[19]' and 'std::string' (aka 'basic_string<char>'))
   87 |                         throw std::runtime_error("Unable to dup fd: " + std::string(strerror(errno)));
      |                                                  ~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../include/c++/v1/__iterator/reverse_iterator.h:293:1: note: candidate template ignored: could not match 'reverse_iterator' against 'basic_string'
  293 | operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) {
      | ^
../src/helpers/buffer.cpp:137:52: error: implicit instantiation of undefined template 'std::basic_string<char>'
  137 |                         throw std::runtime_error("Unable to dup fd: " + std::string(strerror(errno)));
      |                                                                         ^
/usr/bin/../include/c++/v1/__fwd/string.h:43:7: note: template is declared here
   43 | class basic_string;
      |       ^
../src/helpers/buffer.cpp:137:50: error: invalid operands to binary expression ('const char[19]' and 'std::string' (aka 'basic_string<char>'))
  137 |                         throw std::runtime_error("Unable to dup fd: " + std::string(strerror(errno)));
      |                                                  ~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/../include/c++/v1/__iterator/reverse_iterator.h:293:1: note: candidate template ignored: could not match 'reverse_iterator' against 'basic_string'
  293 | operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) {
      | ^
4 errors generated.