Hi,
in Windows which cross tools / toolchain for avr should I use ? FPC's
avr-embedded-xxxx ( from
https://svn.freepascal.org/svn/fpcbuild/binaries/i386-win32 ) or
Microchip's AVR Toolchain for Windows (
https://www.microchip.com/en-us/development-tools-tools-and-software/gcc-compilers-avr-and-arm
) ?
AFAIK, the fpc's supplied avr cross ld, objdump, objcopy, etc version is
"GNU ld (GNU Binutils) 2.30" and Microchip's version is
"(AVR_8_bit_GNU_Toolchain_3.6.2_1778) 2.26.20160125" .
I'm asking because with FPC's avr-embedded-xxxx cross tools, I get the
following warning ( error ? ) but with Microchip's cross tools, the
warning ( error ? ) is gone.
( test program at the end )
"avr-embedded-objdump.exe: Warning: DIE at offset 0x119f refers to
abbreviation number 17 which does not exist"
and the output of avr-embedded-objdump.exe --dwarf
dwarf_DIE_ABBREV_Bug.elf is :
-------------------------------------------------------------
< a lot more before >
<1><1025>: Abbrev Number: 7 (DW_TAG_base_type)
<1026> DW_AT_name : WORD
<102b> DW_AT_encoding : 7 (unsigned)
<102c> DW_AT_byte_size : 2
<1><102d>: Abbrev Number: 8 (DW_TAG_reference_type)
<102e> DW_AT_type : <0x101b>
<1><1032>: Abbrev Number: 0
Compilation Unit @ offset 0x1033:
Length: 0x1e4 (32-bit)
Version: 2
Abbrev Offset: 0x0
Pointer Size: 4
<0><103e>: Abbrev Number: 1 (DW_TAG_compile_unit)
<103f> DW_AT_name : dwarf_DIE_ABBREV_Bug_used_unit.pas
<1062> DW_AT_producer : Free Pascal 3.3.1 2021/02/03
<107f> DW_AT_comp_dir :
G:/Programming/dimitris/Projects/fpc_avr_dwarf_bug/
<10b3> DW_AT_language : 9 (ANSI Pascal)
<10b4> DW_AT_identifier_case: 3 (case_insensitive)
<10b5> DW_AT_stmt_list : 0x0
<10b9> DW_AT_low_pc : 0x0
<10bd> DW_AT_high_pc : 0x0
<1><10c1>: Abbrev Number: 2 (DW_TAG_variable)
<10c2> DW_AT_name : TMPARRAY
<10cb> DW_AT_location : 207 byte block: 10 0 0 3 54 4d 50 41
52 52 41 59 0 4 2 e4 11 0 0 4 0 1 fb 11 0 0 0 5 c1 10 0 0 2 72 74 74 69
64 65 66 24 52 54 54 49 5f 24 44 57 41 52 46 5f 44 49 45 5f 41 42 42 52
45 56 5f 42 55 47 5f 55 53 45 44 5f 55 4e 49 54 5f 24 24 5f 54 4d 50 41
52 52 41 59 0 2a 11 0 0 6 24 52 54 54 49 44 45 46 24 52 54 54 49 5f 24
44 57 41 52 46 5f 44 49 45 5f 41 42 42 52 45 56 5f 42 55 47 5f 55 53 45
44 5f 55 4e 49 54 5f 24 24 5f 54 4d 50 41 52 52 41 59 0 15 0 5 ec 10 0 0
2 72 74 74 69 5f 6e 6f 72 6d 61 6c 5f 61 72 72 61 79 24 31 0 85 11 0 0 6
24 52 54 54 49 5f 4e 4f 52 4d 41 4c 5f 41 52 52 41 59 24 31 0
(DW_OP_constu: 0; (Unknown location op 0x0))
<119b> DW_AT_type : <0x6c05000b>
<1><119f>: Abbrev Number: 17
Contents of the .debug_abbrev section:
Number TAG (0x0)
1 DW_TAG_compile_unit [has children]
DW_AT_name DW_FORM_string
DW_AT_producer DW_FORM_string
< a lot more after >
-------------------------------------------------------------
==========CODE=========
program dwarf_DIE_ABBREV_Bug;
uses
dwarf_DIE_ABBREV_Bug_used_unit;
var
aArray: tmpArray;
begin
end.
==========CODE=========
==========CODE=========
unit dwarf_DIE_ABBREV_Bug_used_unit;
interface
type
tmpArray = array[0..1] of word;
implementation
end.
==========CODE=========
Compiled with : ppcrossavr.exe -MObjFPC -Tembedded -Pavr -CpAVR5
-WpATMEGA328p -Xm -gw2 -O1 dwarf_DIE_ABBREV_Bug.pas
I'm using fpc trunk on Windows 10 :
"Free Pascal Compiler version 3.3.1
Compiler date : 2021/02/03
Compiler CPU target: avr"
regards,
--
Dimitrios Chr. Ioannidis
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