https://sourceware.org/bugzilla/show_bug.cgi?id=26302
Bug ID: 26302
Summary: nm -D -u now by default displays symbol versions,
adding --with-symbol-versions duplicates them
Product: binutils
Version: 2.35
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: qbo...@pld-linux.org
Target Milestone: ---
`nm -D -u` behaviour changed between 2.34 and 2.35.
New version prints undefined symbol versions, adding --with-symbol-versions
duplicates them. It's probably connected with PR/25708 changes.
Example (from linux kernel tools, which build gets broken after binutils
upgrade to 2.35 - reported in PLD Linux, Debian and Ubuntu):
nm 2.34 (i686-linux):
$ nm -u -D plugin_function.so
U free
U memset
U realloc
U strcmp
U strdup
U tep_find_function
U tep_get_field_val
U tep_plugin_add_options
U tep_plugin_remove_options
U tep_register_event_handler
U tep_unregister_event_handler
U trace_seq_printf
U trace_seq_putc
U warning
$ nm -u -D --with-symbol-versions plugin_function.so
U free@GLIBC_2.0
U memset@GLIBC_2.0
U realloc@GLIBC_2.0
U strcmp@GLIBC_2.0
U strdup@GLIBC_2.0
U tep_find_function
U tep_get_field_val
U tep_plugin_add_options
U tep_plugin_remove_options
U tep_register_event_handler
U tep_unregister_event_handler
U trace_seq_printf
U trace_seq_putc
U warning
nm 2.35 (x86_64-linux, so symbol versions differ from i686):
$ nm -u -D plugin_function.so
U free@@GLIBC_2.2.5
U memset@@GLIBC_2.2.5
U realloc@@GLIBC_2.2.5
U strcmp@@GLIBC_2.2.5
U strdup@@GLIBC_2.2.5
U tep_find_function
U tep_get_field_val
U tep_plugin_add_options
U tep_plugin_remove_options
U tep_register_event_handler
U tep_unregister_event_handler
U trace_seq_printf
U trace_seq_putc
U warning
$ nm -u -D --with-symbol-versions plugin_function.so
U free@@GLIBC_2.2.5@GLIBC_2.2.5
U memset@@GLIBC_2.2.5@GLIBC_2.2.5
U realloc@@GLIBC_2.2.5@GLIBC_2.2.5
U strcmp@@GLIBC_2.2.5@GLIBC_2.2.5
U strdup@@GLIBC_2.2.5@GLIBC_2.2.5
U tep_find_function
U tep_get_field_val
U tep_plugin_add_options
U tep_plugin_remove_options
U tep_register_event_handler
U tep_unregister_event_handler
U trace_seq_printf
U trace_seq_putc
U warning
The same is visible on any dynamic library, e.g. libc.so.6:
$ nm -D -u /lib/libc.so.6
U _dl_argv@@GLIBC_PRIVATE
U _dl_exception_create@@GLIBC_PRIVATE
U _dl_find_dso_for_object@@GLIBC_PRIVATE
[...]
$ nm -D -u /lib/libc.so.6 --with-symbol-versions
U _dl_argv@@GLIBC_PRIVATE@GLIBC_PRIVATE
U _dl_exception_create@@GLIBC_PRIVATE@GLIBC_PRIVATE
U _dl_find_dso_for_object@@GLIBC_PRIVATE@GLIBC_PRIVATE
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