[Bug c++/39285] New: Missing debug info for enum members in C++

["ppluzhnikov at google dot com" <gcc-bugzilla at gcc dot gnu dot org>]

GCC @144404 does not generate DW_AT_const_value for enum members in C++ mode
(in C everything appears fine). This is a regression from 4.3.1.

Test case:

enum E { red = 1, green = 42 };

int main()
{
   E e = red;
   return e;
}

When above is compiled with gcc-4.3.1, readelf -w shows:
 <2><2f>: Abbrev Number: 3 (DW_TAG_enumerator)
  <30>     DW_AT_name        : red      
  <34>     DW_AT_const_value : 1        
 <2><35>: Abbrev Number: 4 (DW_TAG_enumerator)
  <36>     DW_AT_name        : (indirect string, offset: 0x8): green    
  <3a>     DW_AT_const_value : 42       
 <1><3c>: Abbrev Number: 5 (DW_TAG_subprogram)
...
When compiled with gcc-4.4.0:
 <2><2f>: Abbrev Number: 3 (DW_TAG_enumerator)
  <30>     DW_AT_name        : red      
 <2><34>: Abbrev Number: 4 (DW_TAG_enumerator)
  <35>     DW_AT_name        : (indirect string, offset: 0x8): green    
 <1><3a>: Abbrev Number: 5 (DW_TAG_subprogram)
...

AFAICT, this is causing the following GDB tests to fail:

FAIL: gdb.cp/classes.exp: print obj_with_enum (2)
FAIL: gdb.cp/classes.exp: print obj_with_enum.priv_enum
FAIL: gdb.cp/classes.exp: ptype obj_with_enum.priv_enum
FAIL: gdb.cp/classes.exp: print ('ClassWithEnum::PrivEnum') 42

FAIL: gdb.cp/m-data.exp: simple object, enum
FAIL: gdb.cp/m-data.exp: derived template object, derived enum
FAIL: gdb.cp/m-data.exp: template object, derived enum
FAIL: gdb.cp/m-static.exp: derived template object, static enum
FAIL: gdb.cp/m-static.exp: template object, static derived enum


-- 
           Summary: Missing debug info for enum members in C++
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ppluzhnikov at google dot com
 GCC build triplet: i686-host_pc-linux-gnu
  GCC host triplet: i686-host_pc-linux-gnu
GCC target triplet: i686-host_pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39285