[clang] f47404b - [clang][docs] Clarify the semantics of -fexceptions

[Alex Bradbury via cfe-commits]

Author: Alex Bradbury
Date: 2023-03-14T19:52:32Z
New Revision: f47404b012d66ed0b411a2b3742931a14e85c80b

URL: https://github.com/llvm/llvm-project/commit/f47404b012d66ed0b411a2b3742931a14e85c80b
DIFF: https://github.com/llvm/llvm-project/commit/f47404b012d66ed0b411a2b3742931a14e85c80b.diff

LOG: [clang][docs] Clarify the semantics of -fexceptions

As noted in <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.

Differential Revision: https://reviews.llvm.org/D145564

Added: 
    

Modified: 
    clang/docs/CommandGuide/clang.rst

Removed: 
    


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diff  --git a/clang/docs/CommandGuide/clang.rst b/clang/docs/CommandGuide/clang.rst
index 7fae1b5cec53c..e076818697eb1 100644
--- a/clang/docs/CommandGuide/clang.rst
+++ b/clang/docs/CommandGuide/clang.rst
@@ -473,8 +473,10 @@ Code Generation Options
 
 .. 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.
+  Allow exceptions to be thrown through Clang compiled stack frames (on many
+  targets, this will enable unwind information for functions that might have
+  an exception thrown through them). For most targets, this is enabled by
+  default for C++.
 
 .. option:: -ftrapv