Fix build failures in aarch64a_[be_]soft_nofp variants. #591
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Those two variants have `-fno-exceptions -fno-rtti` in the configuration file that specifies options for building the library. None of the other library variants is built with this flags, not even the other variants intended for use in _applications_ without exceptions and RTTI. If you try to build libc++abi with those flags, it fails to build, because `private_typeinfo.cpp` is unconditionally included in the library and unconditionally uses `dynamic_cast`. (And I assume that it's OK to use `dynamic_cast` in that part of libc++abi if the application will never use RTTI, because then it won't include that object file in the first place.)
dcandler
approved these changes
Dec 9, 2024
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Those two variants have
-fno-exceptions -fno-rttiin the configuration file that specifies options for building the library. None of the other library variants is built with this flags, not even the other variants intended for use in applications without exceptions and RTTI.If you try to build libc++abi with those flags, it fails to build, because
private_typeinfo.cppis unconditionally included in the library and unconditionally usesdynamic_cast.(And I assume that it's OK to use
dynamic_castin that part of libc++abi if the application will never use RTTI, because then it won't include that object file in the first place.)