gcc debug info

objdump --dwarf=info a.out

a.out:     file format elf64-powerpcle

Contents of the .debug_info section:

  Compilation Unit @ offset 0x0:
   Length:        0xa8 (32-bit)
   Version:       4
   Abbrev Offset: 0x0
   Pointer Size:  8
 <0><b>: Abbrev Number: 1 (DW_TAG_compile_unit)
    <c>   DW_AT_producer    : (indirect string, offset: 0x2a): GNU C++ 5.4.1 20170304 -Asystem=linux -Asystem=unix -Asystem=posix -msecure-plt -mcpu=power8 -ggdb -O0 -fstack-protector-strong
    <10>   DW_AT_language    : 4        (C++)
    <11>   DW_AT_name        : (indirect string, offset: 0xf3): stest.cpp
    <15>   DW_AT_comp_dir    : (indirect string, offset: 0xaa): /home/lbianc/mydata2
    <19>   DW_AT_low_pc      : 0x840
    <21>   DW_AT_high_pc     : 0xa8
    <29>   DW_AT_stmt_list   : 0x0
 <1><2d>: Abbrev Number: 2 (DW_TAG_base_type)
    <2e>   DW_AT_byte_size   : 8
    <2f>   DW_AT_encoding    : 7        (unsigned)
    <30>   DW_AT_name        : (indirect string, offset: 0x18): long unsigned int
 <1><34>: Abbrev Number: 2 (DW_TAG_base_type)
    <35>   DW_AT_byte_size   : 4
    <36>   DW_AT_encoding    : 7        (unsigned)
    <37>   DW_AT_name        : (indirect string, offset: 0x1d): unsigned int
 <1><3b>: Abbrev Number: 3 (DW_TAG_base_type)
    <3c>   DW_AT_byte_size   : 4
    <3d>   DW_AT_encoding    : 5        (signed)
    <3e>   DW_AT_name        : int
 <1><42>: Abbrev Number: 2 (DW_TAG_base_type)
    <43>   DW_AT_byte_size   : 8
    <44>   DW_AT_encoding    : 5        (signed)
    <45>   DW_AT_name        : (indirect string, offset: 0x5): long int
 <1><49>: Abbrev Number: 2 (DW_TAG_base_type)
    <4a>   DW_AT_byte_size   : 8
    <4b>   DW_AT_encoding    : 5        (signed)
    <4c>   DW_AT_name        : (indirect string, offset: 0x0): long long int
 <1><50>: Abbrev Number: 2 (DW_TAG_base_type)
    <51>   DW_AT_byte_size   : 8
    <52>   DW_AT_encoding    : 7        (unsigned)
    <53>   DW_AT_name        : (indirect string, offset: 0xe0): sizetype
 <1><57>: Abbrev Number: 2 (DW_TAG_base_type)
    <58>   DW_AT_byte_size   : 2
    <59>   DW_AT_encoding    : 7        (unsigned)
    <5a>   DW_AT_name        : (indirect string, offset: 0xcd): short unsigned int
 <1><5e>: Abbrev Number: 2 (DW_TAG_base_type)
    <5f>   DW_AT_byte_size   : 1
    <60>   DW_AT_encoding    : 8        (unsigned char)
    <61>   DW_AT_name        : (indirect string, offset: 0xc8): char
 <1><65>: Abbrev Number: 2 (DW_TAG_base_type)
    <66>   DW_AT_byte_size   : 1
    <67>   DW_AT_encoding    : 8        (unsigned char)
    <68>   DW_AT_name        : (indirect string, offset: 0xbf): unsigned char
 <1><6c>: Abbrev Number: 2 (DW_TAG_base_type)
    <6d>   DW_AT_byte_size   : 1
    <6e>   DW_AT_encoding    : 6        (signed char)
    <6f>   DW_AT_name        : (indirect string, offset: 0xc1): signed char
 <1><73>: Abbrev Number: 2 (DW_TAG_base_type)
    <74>   DW_AT_byte_size   : 2
    <75>   DW_AT_encoding    : 5        (signed)
    <76>   DW_AT_name        : (indirect string, offset: 0xe9): short int
 <1><7a>: Abbrev Number: 2 (DW_TAG_base_type)
    <7b>   DW_AT_byte_size   : 8
    <7c>   DW_AT_encoding    : 7        (unsigned)
    <7d>   DW_AT_name        : (indirect string, offset: 0x13): long long unsigned int
 <1><81>: Abbrev Number: 4 (DW_TAG_subprogram)
    <82>   DW_AT_external    : 1
    <82>   DW_AT_name        : (indirect string, offset: 0xe): main
    <86>   DW_AT_decl_file   : 1
    <87>   DW_AT_decl_line   : 4
    <88>   DW_AT_type        : <0x3b>
    <8c>   DW_AT_low_pc      : 0x840
    <94>   DW_AT_high_pc     : 0xa8
    <9c>   DW_AT_frame_base  : 1 byte block: 9c         (DW_OP_call_frame_cfa)
    <9e>   DW_AT_GNU_all_tail_call_sites: 1
 <2><9e>: Abbrev Number: 5 (DW_TAG_variable)
    <9f>   DW_AT_name        : a
    <a1>   DW_AT_decl_file   : 1
    <a2>   DW_AT_decl_line   : 5
    <a3>   DW_AT_type        : <0x3b>
    <a7>   DW_AT_location    : 2 byte block: 91 64      (DW_OP_fbreg: -28)
 <2><aa>: Abbrev Number: 0
 <1><ab>: Abbrev Number: 0