[Bug binutils/26028] Readelf truncates symbol names - which is both undocumented, and unnecessary

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=26028

--- Comment #7 from Fangrui Song <i at maskray dot me> ---
(In reply to Nick Clifton from comment #6)
> (In reply to Fangrui Song from comment #5)
> 
> > About the new -T/--silent-truncation option, I wonder whether the truncation
> > is important enough that deserves a short option... When a truncated symbol
> > name, it almost certainly means the user has to add --wide and rerun readelf
> > if they want to base their decisions on the symbol name (e.g. objdump -d ...
> > | grep $symbol_name_extracted_from_readelf). I don't know whether a short
> > option -T will help them..
> 
> Eh - there are enough unused single letters that having a short version of
> the --silent-truncation option should not cause any grief.  The option
> itself is certainly useful - for example in the linker and binutils
> testsuites - and I am sure that there are some people who will want to use
> it for their own scripts/build systems.

I haven't studied the implementation but it seems that the default output has
become worse for many system utilities.

binutils 2.34:

% readelf -s =cat
...
    58: 000000000000b278     8 OBJECT  GLOBAL DEFAULT   26
__progname_full@GLIBC_2.2.5 (2)
    59: 000000000000b260     8 OBJECT  WEAK   DEFAULT   26
program_invocation_short_@GLIBC_2.2.5 (2)
    60: 000000000000b280     8 OBJECT  GLOBAL DEFAULT   26 stderr@GLIBC_2.2.5
(2)
    61: 000000000000b270     4 OBJECT  GLOBAL DEFAULT   26 optind@GLIBC_2.2.5
(2)

master:

% ./Debug/binutils/readelf -s =cat
...
    58: 000000000000b278     8 OBJECT  GLOBAL DEFAULT   26 [...]@GLIBC_2.2.5
(2)
    59: 000000000000b260     8 OBJECT  WEAK   DEFAULT   26 [...]@GLIBC_2.2.5
(2)
    60: 000000000000b280     8 OBJECT  GLOBAL DEFAULT   26 [...]@GLIBC_2.2.5
(2)
    61: 000000000000b270     4 OBJECT  GLOBAL DEFAULT   26 [...]@GLIBC_2.2.5
(2)

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