[src/trunk]: src/doc PR toolchain/54820

[rin <rin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3c13d69d9d22
branches:  trunk
changeset: 971605:3c13d69d9d22
user:      rin <rin%NetBSD.org@localhost>
date:      Wed Apr 29 11:08:40 2020 +0000

description:
PR toolchain/54820
PR toolchain/54877

earmv7hf{,eb}: compile gdb/dwarf2expr.c with -O0 for GCC8

http://cvsweb.netbsd.org/bsdweb.cgi/src/external/gpl3/gdb/lib/libgdb/Makefile#rev1.22

diffstat:

 doc/HACKS |  13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diffs (24 lines):

diff -r 7ecd488b97b8 -r 3c13d69d9d22 doc/HACKS
--- a/doc/HACKS Wed Apr 29 11:04:58 2020 +0000
+++ b/doc/HACKS Wed Apr 29 11:08:40 2020 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: HACKS,v 1.201 2020/04/12 17:49:00 leot Exp $
+# $NetBSD: HACKS,v 1.202 2020/04/29 11:08:40 rin Exp $
 #
 # This file is intended to document workarounds for currently unsolved
 # (mostly) compiler bugs.
@@ -975,3 +975,14 @@
        /dist/llvm/include/llvm/CodeGen/MachineFrameInfo.h", line 495, \
        function "__int64_t llvm::MachineFrameInfo::getObjectOffset(int) const"
 kcah
+
+port   earmv7hf*
+hack   compile gdb/dwarf2expr.c with -O0 for GCC8 (toolchain/54820 and 54877)
+cdate  Wed Apr 29 11:04:58 UTC 2020
+who    rin
+file   src/external/gpl3/gdb/lib/libgdb/Makefile: 1.22
+descr  GCC 8.4 miscompiles dwarf2expr.c with -O2 or -O1, which results in
+       crashes with 'gdb_exception_RETURN_MASK_ERROR'. Note that this occurs
+       only for earmv7hf{,eb} as far as I can see. Neither earmv6hf{,eb} nor
+       earmv7{,eb} (softfloat) are affected.
+kcah