https://bugs.llvm.org/show_bug.cgi?id=45040
Bug ID: 45040
Summary: -gdwarf-5 and binutils 2.30 compat
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: DebugInfo
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected],
[email protected], [email protected]
Blocks: 4068
I'm trying to use `-gdwarf-5 -no-integrated-as` to enable dwarf-5 support in
the Linux kernel, and running into issues with my assembler, GNU as 2.30.
do_mounts.s:19: Error: junk at end of line, first unrecognized character is `m'
do_mounts.s:19: Error: file number less than one
Looks like the following line:
.file 0 "/home/nick/linux/init/do_mounts.c" md5
0x62e8a195aa9d4d8b466f84b7775ea4cd
So it looks like a file index starting from 0 is problematic, AND the md5
checksums are problematic.
Are there flags to disable these? I know I should just update my binutils, but
it would be nice to still support a few releases of GNU binutils, if possible.
https://sourceware.org/binutils/docs/as/File.html#File for example states:
`The fileno operand should be a unique positive integer`.
The checksums don't seem documented in binutils docs (at least for the .file
directive), and I haven't yet looked at their source or newer versions to see
if this is supported.
Referenced Bugs:
https://bugs.llvm.org/show_bug.cgi?id=4068
[Bug 4068] [Meta] Compiling the Linux kernel with clang
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