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As noted in #6126 <https://github.com/llvm/llvm-project/issues/61216> the documentation for `-fexceptions` appears to imply that unwind information is always generated, which isn't the case. https://reviews.llvm.org/D145564 Files: clang/docs/CommandGuide/clang.rst Index: clang/docs/CommandGuide/clang.rst =================================================================== --- clang/docs/CommandGuide/clang.rst +++ clang/docs/CommandGuide/clang.rst @@ -473,8 +473,8 @@ .. option:: -fexceptions - Enable generation of unwind information. This allows exceptions to be thrown - through Clang compiled stack frames. This is on by default in x86-64. + Enable generation of unwind information for functions that might have an + exception through through them. This is on by default in x86-64. .. option:: -ftrapv
Index: clang/docs/CommandGuide/clang.rst =================================================================== --- clang/docs/CommandGuide/clang.rst +++ clang/docs/CommandGuide/clang.rst @@ -473,8 +473,8 @@ .. option:: -fexceptions - Enable generation of unwind information. This allows exceptions to be thrown - through Clang compiled stack frames. This is on by default in x86-64. + Enable generation of unwind information for functions that might have an + exception through through them. This is on by default in x86-64. .. option:: -ftrapv
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