https://sourceware.org/bugzilla/show_bug.cgi?id=23306
Bug ID: 23306
Summary: Please add feature to nm to display symbol visibility
Product: binutils
Version: 2.31 (HEAD)
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: zenith432 at users dot sourceforge.net
Target Milestone: ---
There are 3 utilities that dump the symbol table of object files
objdump
readelf
nm
Of these, objdump and readelf can display detailed symbol information - such as
the symbol visiblity.
nm dumps symbols, but does not display visibility.
Why is this important?
Because objdump and readelf only work on machine object files - elf, coff.
nm is the only one that works on LTO objects. It has plugin support, and a gcc
wrapper gcc-nm that invokes it with a plugin.
So nm today is the only tool that can dump symbols from LTO objects, but it
doesn't do a full job of dumping all information about a symbol.
LLVM-nm has an option "-m", modelled on Apple's "nm -m" that displays extended
information - including visibility.
There is probably a format issue with this request, because nm uses official
bsd, sysv or posix syntax.
However, a "-m" extension can use any extended form it wants.
Thanks.
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