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.
