rprichard added a comment.
As an aside, it seems interesting that
libcxxabi/test/forced_unwind[12].pass.cpp don't compile for ARM EHABI when used
with Clang's unwind.h. AFAICT it's been that way for a long time?
$ /x/clang14/bin/clang -target arm-linux-gnueabi
/x/llvm-upstream/llvm-project/libcxxabi/test/forced_unwind1.pass.cpp -c -I
/x/llvm-upstream/llvm-project/libcxxabi/include
/x/llvm-upstream/llvm-project/libcxxabi/test/forced_unwind1.pass.cpp:42:42:
error: typedef '_Unwind_Exception' cannot be referenced with a struct specifier
struct _Unwind_Exception*,
^
/x/clang+llvm-14.0.0-x86_64-linux-gnu-ubuntu-18.04/lib/clang/14.0.0/include/unwind.h:67:38:
note: declared here
typedef struct _Unwind_Control_Block _Unwind_Exception; /* Alias */
^
/x/llvm-upstream/llvm-project/libcxxabi/test/forced_unwind1.pass.cpp:50:49:
error: typedef '_Unwind_Exception' cannot be referenced with a struct specifier
static void cleanup(_Unwind_Reason_Code, struct _Unwind_Exception* exc) {
^
/x/clang+llvm-14.0.0-x86_64-linux-gnu-ubuntu-18.04/lib/clang/14.0.0/include/unwind.h:67:38:
note: declared here
typedef struct _Unwind_Control_Block _Unwind_Exception; /* Alias */
^
2 errors generated.
Clang uses its own unwind.h rather than libunwind's unwind.h:
$ /x/clang14/bin/clang -target arm-linux-gnueabi
/x/llvm-upstream/llvm-project/libcxxabi/test/forced_unwind1.pass.cpp -c -I
/x/llvm-upstream/llvm-project/libcxxabi/include -H 2>&1 | grep unwind.h$
.
/x/clang+llvm-14.0.0-x86_64-linux-gnu-ubuntu-18.04/lib/clang/14.0.0/include/unwind.h
$ head -15
/x/clang+llvm-14.0.0-x86_64-linux-gnu-ubuntu-18.04/lib/clang/14.0.0/include/unwind.h
/*===---- unwind.h - Stack unwinding
----------------------------------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
*===-----------------------------------------------------------------------===
*/
/* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
#ifndef __CLANG_UNWIND_H
#define __CLANG_UNWIND_H
#if defined(__APPLE__) && __has_include_next(<unwind.h>)
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D139503/new/
https://reviews.llvm.org/D139503
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