include: linker: Set eh_frame size to 0 when C++ exceptions are disabled #97085
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When building Zephyr with CONFIG_CPP_EXCEPTIONS=n and linking against a libc++ built with support for exceptions, lld complains that the eh_frame-related symbols are missing: ld.lld: error: undefined symbol: __eh_frame_start ld.lld: error: undefined symbol: __eh_frame_end ld.lld: error: undefined symbol: __eh_frame_hdr_start ld.lld: error: undefined symbol: __eh_frame_hdr_end libunwind handles the zero size: https://github.com/llvm/llvm-project/blob/76e71e05d2687f602695931b2fbf25e4e262dcc4/libunwind/src/AddressSpace.hpp#L520-L526 https://github.com/llvm/llvm-project/blob/76e71e05d2687f602695931b2fbf25e4e262dcc4/libunwind/src/EHHeaderParser.hpp#L61-L64 Signed-off-by: Tom Hughes <[email protected]>
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When building Zephyr with CONFIG_CPP_EXCEPTIONS=n and linking against a
libc++ built with support for exceptions, lld complains that the
eh_frame-related symbols are missing:
ld.lld: error: undefined symbol: __eh_frame_start
ld.lld: error: undefined symbol: __eh_frame_end
ld.lld: error: undefined symbol: __eh_frame_hdr_start
ld.lld: error: undefined symbol: __eh_frame_hdr_end
libunwind handles the zero size:
https://github.com/llvm/llvm-project/blob/76e71e05d2687f602695931b2fbf25e4e262dcc4/libunwind/src/AddressSpace.hpp#L520-L526
https://github.com/llvm/llvm-project/blob/76e71e05d2687f602695931b2fbf25e4e262dcc4/libunwind/src/EHHeaderParser.hpp#L61-L64