https://sourceware.org/bugzilla/show_bug.cgi?id=25614
Bug ID: 25614
Summary: dwarf-5 allows for .file 0
Product: binutils
Version: 2.35 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: ndesaulniers at google dot com
Target Milestone: ---
.file 0 "asdf"
.section .debug_info,"",@progbits
.long 3
.short 5
$ as x.s
x.s: Assembler messages:
x.s:1: Error: file number less than one
It seems that dwarf-5 may have added support for `0` as a valid file number.
Clang warns:
$ clang x.s -c
x.s:1:1: warning: file 0 not supported prior to DWARF-5
.file 0 "asdf"
^
$ clang x.s -c -gdwarf-5
I *think* section "2.14 Declaration Coordinates" pdf page 68 of [0] addresses
this:
"The value 0 indicates that no source file has been specified."
See also [1].
[0] http://www.dwarfstd.org/doc/DWARF5.pdf
[1] https://bugs.llvm.org/show_bug.cgi?id=45040
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