Package: tcl-expect
Version: 5.45.4-1
Severity: minor
File: /usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4
User: debian...@lists.debian.org
Usertags: undefined-symbol adequate
libexpect.so needs to link with Tcl, see the output of adequate,
symtree and objdump below. I detected this on amd64 but the Debian
build log scanner also detected dpkg-buildpackage complaining about it
on other architectures, see the w3m and build log output below.
I filed this bug at severity minor since it looks like the code using
libexpect.so (expect, skycat) also already uses Tcl libs.
This bug report brought to you by adequate:
http://bonedaddy.net/pabs3/log/2013/02/23/inadequate-software/
$ adequate tcl-expect
tcl-expect:amd64: undefined-symbol
/usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4 => Tcl_ErrnoMsg
tcl-expect:amd64: undefined-symbol
/usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4 => Tcl_Free
tcl-expect:amd64: undefined-symbol
/usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4 => Tcl_Alloc
$ man adequate | grep -A4 undefined-symbol
undefined-symbol
The symbol has not been found in the libraries linked with the
binary. Either the binary either needs to be linked with an additional shared
library, or the dependency
on the shared library package that provides this symbol is too weak.
References: Debian Policy §3.5, §8.6, §10.2.
$ lddtree /usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4
libexpect.so.5.45.4 => /usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4
(interpreter => none)
libutil.so.1 => /lib/x86_64-linux-gnu/libutil.so.1
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6
ld-linux-x86-64.so.2 => /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6
$ symtree /usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4
/usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4
libutil.so.1 => openpty
libm.so.6 => log,pow
libc.so.6 =>
fflush,strcpy,__printf_chk,exit,srand,fopen,strncmp,optind,wait,__longjmp_chk,pipe,perror,__isoc99_sscanf,signal,strncpy,__vsprintf_chk,fork,time,__stack_chk_fail,unlink,realloc,abort,stdin,getpid,strftime,gmtime,strtol,isatty,feof,fgets,strlen,strstr,strcspn,tcsendbreak,__errno_location,tcsetattr,read,ttyname,getopt,dup2,__fprintf_chk,__sigsetjmp,stdout,memcpy,memcpy,rand,malloc,__ctype_b_loc,getenv,optarg,stderr,ioctl,alarm,system,dup,execvp,freopen,fileno,fwrite,waitpid,close,open,localtime,strchr,__vfprintf_chk,fdopen,tcgetattr,sleep,__strcpy_chk,__cxa_finalize,setsid,fcntl,__sprintf_chk,link,__xstat,memmove,_IO_getc,__strcat_chk,setbuf,strcmp,write,free
WEAK => _ITM_deregisterTMCloneTable,__gmon_start__,_ITM_registerTMCloneTable
UNRESOLVED => Tcl_Free,Tcl_Alloc,Tcl_ErrnoMsg
$ objdump -T /usr/lib/x86_64-linux-gnu/libtcl8.6.so.0 | grep -E "($(symtree
/usr/lib/x86_64-linux-gnu/libexpect.so.5.45.4 | sed -n 's/UNRESOLVED =>
//p' | tr , '|'))$"
00117f30 gDF .text 03db BaseTcl_ErrnoMsg
0004af60 gDF .text 0005 BaseTcl_Free
0004ae20 gDF .text 0021 BaseTcl_Alloc
$ w3m -dump https://qa.debian.org/bls/packages/e/expect.html | grep -A2 symbol
• W shlibs-symbol-not-found (alpha, arm64, armel, armhf, hppa, hurd-i386,
i386, ia64, m68k, mips, mips64el, mipsel, powerpc, powerpcspe, ppc64,
ppc64el, s390x, sh4, sparc64, x32)
$ w3m -dump https://qa.debian.org/bls/bytag/W-shlibs-symbol-not-found.html |
grep -A12 description
description
The build logs contains a like like
dpkg-shlibdeps: warning: symbol NAME used by BINARY found in none of the
libraries.
Possible reasons:
• A library not linked with a library needed.
While this can sometimes make sense in order to allow the using binary to
decide which of multiple available implementations to use, it means that
dependency information might be incorrect, optimisations like prelinking
might fail and stuff like that.
$ chronic getbuildlog expect last
$ grep 'dpkg-shlibdeps: warning: symbol .* used by .* found in none of the
libraries' *.log
expect_5.45.4-1_alpha.log:dpkg-shlibdeps: warning: symbol Tcl_Free used by
debian/tcl-expect/usr/lib/alpha-linux-gnu/libexpect.so.5.45.4 found in none of
the libraries
expect_5.45.4-1_alpha.log:dpkg-shlibdeps: warning: symbol Tcl_Alloc used by
debian/tcl-expect/usr/lib/alpha-linux-gnu/libexpect.so.5.45.4 found in none of
the libraries
expect_5.45.4-1_alpha.log:dpkg-shlibdeps: warning: symbol Tcl_ErrnoMsg used by
debian/tcl-expect/usr/lib/alpha-linux-gnu/libexpect.so.5.45.4 found in none of
the libraries
expect_5.45.4-1_arm64.log:dpkg-shlibdeps: warning: symbol Tcl_Free used by
debian/tcl-expect/usr/lib/aarch64-linux-gnu/libexpect.so.5.45.4 found in none
of the libraries
expect_5.45.4-1_arm64.log:dpkg-shlibdeps: warning: symbol Tcl_Alloc used by
debian/tcl-expect/usr/lib/aarch64-linux-gnu/libexpect.so.5.45.4 found in none
of the libraries
expect_5.45.4-1_arm64.log:dpkg-shlibdeps: warning
