https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77985
Bug ID: 77985 Summary: DW_AT_comp_dir is omitted when filename is absolute and the file does not contain a specific typedef Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug Assignee: unassigned at gcc dot gnu.org Reporter: infinity0 at pwned dot gg Target Milestone: --- Hi, GCC 7.0.0 (latest snapshot) and GCC 6.1.1 both exhibit the following behaviour: + gcc-build/destdir/usr/local/bin/gcc --version gcc (GCC) 7.0.0 20161009 (experimental) Copyright (C) 2016 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + cat test0.c typedef __builtin_va_list __gnuc_va_list; void func (void) {} + cat test1.c void func (void) {} + gcc-build/destdir/usr/local/bin/gcc test0.c -g -dA -S -o- | grep comp_dir .long .LASF4 # DW_AT_comp_dir: "/home/infinity0/var/lib/reproducible" .uleb128 0x1b # (DW_AT_comp_dir) + gcc-build/destdir/usr/local/bin/gcc test1.c -g -dA -S -o- | grep comp_dir .long .LASF2 # DW_AT_comp_dir: "/home/infinity0/var/lib/reproducible" .uleb128 0x1b # (DW_AT_comp_dir) + gcc-build/destdir/usr/local/bin/gcc /home/infinity0/var/lib/reproducible/test0.c -g -dA -S -o- | grep comp_dir .long .LASF4 # DW_AT_comp_dir: "/home/infinity0/var/lib/reproducible" .uleb128 0x1b # (DW_AT_comp_dir) + gcc-build/destdir/usr/local/bin/gcc /home/infinity0/var/lib/reproducible/test1.c -g -dA -S -o- | grep comp_dir # exit code 1 See the attached file for a shell script where you can reproduce this yourself.