folly fails on 10.8.5: error: no type named '__cxa_increment_exception_refcount' in namespace '__cxxabiv1'

[barracuda156]

FAILED: CMakeFiles/folly_base.dir/folly/lang/Exception.cpp.o 
/opt/local/bin/clang++-mp-16 -DFMT_SHARED -DFOLLY_XLOG_STRIP_PREFIXES=\"/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_folly/folly/work/folly-v2024.01.08.00:/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_folly/folly/work/build\" -DGFLAGS_IS_A_DLL=0 -D_GNU_SOURCE -D_REENTRANT -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_folly/folly/work/folly-v2024.01.08.00 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_folly/folly/work/build -I/opt/local/libexec/boost/1.81/include -I/opt/local/include -I/opt/local/libexec/openssl3/include -I/opt/local/include/libfmt10 -pipe -I/opt/local/libexec/openssl3/include -I/opt/local/libexec/boost/1.81/include -Os -std=c++17 -fno-aligned-allocation -DFOLLY_ALLOW_TFO=0 -DNDEBUG -isystem/opt/local/include/libcxx/v1 -nostdinc++ -isystem/opt/local/include/LegacySupport -I/opt/local/libexec/openssl3/include -I/opt/local/libexec/boost/1.81/include -isystem/opt/local/include -Wno-undef-prefix -stdlib=libc++ -std=gnu++17 -arch x86_64 -arch i386 -mmacosx-version-min=10.8 -fPIC -g -finput-charset=UTF-8 -fsigned-char -Wall -Wno-deprecated -Wno-deprecated-declarations -Wno-sign-compare -Wno-unused -Wuninitialized -Wunused-label -Wunused-result -Wno-noexcept-type -Wno-nullability-completeness -Wno-inconsistent-missing-override -fopenmp -MD -MT CMakeFiles/folly_base.dir/folly/lang/Exception.cpp.o -MF CMakeFiles/folly_base.dir/folly/lang/Exception.cpp.o.d -o CMakeFiles/folly_base.dir/folly/lang/Exception.cpp.o -c /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_folly/folly/work/folly-v2024.01.08.00/folly/lang/Exception.cpp
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_folly/folly/work/folly-v2024.01.08.00/folly/lang/Exception.cpp:272:8: error: no type named '__cxa_increment_exception_refcount' in namespace '__cxxabiv1'
  abi::__cxa_increment_exception_refcount(object);
  ~~~~~^
1 error generated.

[barracuda156]

Also needs thread_local_storage apparently: ​https://build.macports.org/builders/ports-10.6_x86_64-builder/builds/184797/steps/install-port/logs/stdio

I will try to fix all these.

[barracuda156]

Well, this breaks folly: #69150