lkml.org 
[lkml]   [2021]   [Mar]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectCLANG LTO compatibility issue with DEBUG_INFO_BTF
Hi,

When trying the latest 5.12-rc3 with both LTO_CLANG_THIN and DEBUG_INFO_BTF
enabled, I met lots of warnings such as:

...
tag__recode_dwarf_type: couldn't find 0x4a7ade5 type for 0x4ab9f88 (subroutine_type)!
ftype__recode_dwarf_types: couldn't find 0x4a7ade5 type for 0x4ab9fa4 (formal_parameter)!
...
namespace__recode_dwarf_types: couldn't find 0x4a8ff4a type for 0x4aba05c (member)!
namespace__recode_dwarf_types: couldn't find 0x4a7ae9b type for 0x4aba084 (member)!
...
WARN: multiple IDs found for 'path': 281, 729994 - using 281
WARN: multiple IDs found for 'task_struct': 421, 730101 - using 421
...


then finally get build error:
FAILED unresolved symbol vfs_truncate


Is this a known issue? Do we need to make DEBUG_INFO_BTF depend on !LTO?

pahole version: v1.20
clang version: 11.0


Thanks

\
 
 \ /
  Last update: 2021-03-19 04:47    [W:0.050 / U:2.620 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site