https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98796
Bug ID: 98796 Summary: Incorrect .debug_line emitted for DWARF5 Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug Assignee: unassigned at gcc dot gnu.org Reporter: jakub at gcc dot gnu.org Target Milestone: --- GCC emits incorrect DWARF5 on empty translation units. > empty.c gcc -S -gdwarf-5 -dA empty.c -o empty.s -gno-as-loc-support or gcc -S -gdwarf-5 -dA empty.c -o empty.s -flto -ffat-lto-objects emits .byte 0 # Directory entry format count .uleb128 0 # Directories count .byte 0 # File name entry format count .uleb128 0 # File names count at the end of .debug_line or .gnu.debuglto_.debug_line sections. The DWARF5 specification says: "The first entry is the current directory of the compilation." and "The first entry in the sequence is the primary source file whose file name exactly matches that given in the DW_AT_name attribute in the compilation unit debugging information entry." which is not honored when no directory and file name entries are provided.