error: aggregate ‘std::ofstream genfile’ has incomplete type and cannot be defined

[Alessandro-Barbieri]

Gentoo's CI had a build failure

[69/281] /usr/bin/x86_64-pc-linux-gnu-g++ -DBOOST_ATOMIC_DYN_LINK -DBOOST_ATOMIC_NO_LIB -DBOOST_CONTEXT_DYN_LINK -DBOOST_CONTEXT_NO_LIB -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_FILESYSTEM_NO_LIB -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_PROGRAM_OPTIONS_NO_LIB -DBOOST_REGEX_DYN_LINK -DBOOST_REGEX_NO_LIB -DBOOST_SYSTEM_DYN_LINK -DBOOST_SYSTEM_NO_LIB -DBOOST_THREAD_DYN_LINK -DBOOST_THREAD_NO_LIB -DFMT_LOCALE -DFMT_SHARED -DLOCATION_HH=\"/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00_build/thrift/compiler/location.hh\" -DTHRIFT_HAVE_LIBSNAPPY=0 -I/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00 -I/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00_build  -O2 -pipe -march=x86-64 -frecord-gcc-switches -fno-diagnostics-color -fmessage-length=0 -std=c++17 -MD -MT thrift/compiler/CMakeFiles/thrift1.dir/compiler.cc.o -MF thrift/compiler/CMakeFiles/thrift1.dir/compiler.cc.o.d -o thrift/compiler/CMakeFiles/thrift1.dir/compiler.cc.o -c /var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00/thrift/compiler/compiler.cc
FAILED: thrift/compiler/CMakeFiles/thrift1.dir/compiler.cc.o 
/usr/bin/x86_64-pc-linux-gnu-g++ -DBOOST_ATOMIC_DYN_LINK -DBOOST_ATOMIC_NO_LIB -DBOOST_CONTEXT_DYN_LINK -DBOOST_CONTEXT_NO_LIB -DBOOST_FILESYSTEM_DYN_LINK -DBOOST_FILESYSTEM_NO_LIB -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_PROGRAM_OPTIONS_NO_LIB -DBOOST_REGEX_DYN_LINK -DBOOST_REGEX_NO_LIB -DBOOST_SYSTEM_DYN_LINK -DBOOST_SYSTEM_NO_LIB -DBOOST_THREAD_DYN_LINK -DBOOST_THREAD_NO_LIB -DFMT_LOCALE -DFMT_SHARED -DLOCATION_HH=\"/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00_build/thrift/compiler/location.hh\" -DTHRIFT_HAVE_LIBSNAPPY=0 -I/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00 -I/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00_build  -O2 -pipe -march=x86-64 -frecord-gcc-switches -fno-diagnostics-color -fmessage-length=0 -std=c++17 -MD -MT thrift/compiler/CMakeFiles/thrift1.dir/compiler.cc.o -MF thrift/compiler/CMakeFiles/thrift1.dir/compiler.cc.o.d -o thrift/compiler/CMakeFiles/thrift1.dir/compiler.cc.o -c /var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00/thrift/compiler/compiler.cc
/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00/thrift/compiler/compiler.cc: In function ‘bool apache::thrift::compiler::{anonymous}::generate(const apache::thrift::compiler::{anonymous}::gen_params&, apache::thrift::compiler::t_program*, std::set<std::__cxx11::basic_string<char> >&)’:
/var/tmp/portage/dev-cpp/fbthrift-2022.04.11.00-r1/work/fbthrift-2022.04.11.00/thrift/compiler/compiler.cc:331:19: error: aggregate ‘std::ofstream genfile’ has incomplete type and cannot be defined
  331 |     std::ofstream genfile;
      |                   ^~~~~~~

see https://bugs.gentoo.org/848456
log https://848456.bugs.gentoo.org/attachment.cgi?id=781388

[vitaut]

This has been fixed in 5bd55f1 already.