Your message dated Fri, 21 Aug 2015 13:43:08 +0000
with message-id <e1zsmb6-0004jv...@franck.debian.org>
and subject line Bug#796274: Removed package(s) from unstable
has caused the Debian Bug report #629866,
regarding gcc-4.6: --no-add-needed disturbs weak references
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact ow...@bugs.debian.org
immediately.)
--
629866: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629866
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: gcc-4.6
Version: 4.6.0-10
Severity: normal
Hello,
Since gcc started using --no-add-needed by default, there are issues
with weak references, see attached testcase:
- libthread represents a thread library, which here only provide the
"cancel" symbol.
- libA is a library which uses the "cancel" symbol, and links against
the thread library.
- foo.c is a file which detects whether the thread library is brought
into the program by showing the value of a weak reference to cancel.
- main.c uses both libA and foo.
The result is this:
cc thread.c -o libthread.so -shared -fPIC
cc libA.c -o libA.so -shared -fPIC -L. -lthread -Wl,-rpath=/tmp/tmp
cc -Wall -g -c -o foo.o foo.c
cc foo.o main.c -o main -L. -lA
/usr/bin/ld.bfd.real: ./libA.so: undefined reference to symbol 'cancel'
/usr/bin/ld.bfd.real: note: 'cancel' is defined in DSO /tmp/tmp/libthread.so so
try adding it to the linker command line
/tmp/tmp/libthread.so: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make: *** [main] Erreur 1
For some reason the linker doesn't manage to resolve the "cancel"
symbol, although it's supposed to be brought in by libA.so.
In case you wonder where that testcast comes from, it's actually gcc
itself, the __gthread_active_p() function, which gets inlined into
applications.
Samuel
-- System Information:
Debian Release: wheezy/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1,
'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.39 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages gcc-4.6 depends on:
ii binutils 2.21.51.20110523-1 The GNU assembler, linker and bina
ii cpp-4.6 4.6.0-10 The GNU C preprocessor
ii gcc-4.6-base 4.6.0-10 The GNU Compiler Collection (base
ii libc6 2.13-4 Embedded GNU C Library: Shared lib
ii libcloog-ppl0 0.15.9-3 the Chunky Loop Generator (runtime
ii libgcc1 1:4.6.0-10 GCC support library
ii libgmp10 2:5.0.1+dfsg-7 Multiprecision arithmetic library
ii libgmpxx4ldbl 2:5.0.1+dfsg-7 Multiprecision arithmetic library
ii libgomp1 4.6.0-10 GCC OpenMP (GOMP) support library
ii libmpc2 0.9-3 multiple precision complex floatin
ii libmpfr4 3.0.1-3 multiple precision floating-point
ii libppl-c4 0.11.2-3 Parma Polyhedra Library (C interfa
ii libppl9 0.11.2-3 Parma Polyhedra Library (runtime l
ii libquadmath0 4.6.0-10 GCC Quad-Precision Math Library
ii zlib1g 1:1.2.3.4.dfsg-3 compression library - runtime
Versions of packages gcc-4.6 recommends:
ii libc6-dev 2.13-4 Embedded GNU C Library: Developmen
Versions of packages gcc-4.6 suggests:
pn binutils-gold <none> (no description available)
ii gcc-4.6-doc 4.6-20110123-1 Documentation for the GNU compiler
pn gcc-4.6-locales <none> (no description available)
pn gcc-4.6-multilib <none> (no description available)
ii libgcc1-dbg 1:4.6.0-10 GCC support library (debug symbols
pn libgomp1-dbg <none> (no description available)
pn libmudflap0-4.6-dev <none> (no description available)
pn libmudflap0-dbg <none> (no description available)
pn libquadmath0-dbg <none> (no description available)
-- no debconf information
test.tgz
Description: application/tar-gz
--- End Message ---
--- Begin Message ---
Version: 4.6.4-7+rm
Dear submitter,
as the package gcc-4.6 has just been removed from the Debian archive
unstable we hereby close the associated bug reports. We are sorry
that we couldn't deal with your issue properly.
For details on the removal, please see https://bugs.debian.org/796274
The version of this package that was in Debian prior to this removal
can still be found using http://snapshot.debian.org/.
This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmas...@ftp-master.debian.org.
Debian distribution maintenance software
pp.
Scott Kitterman (the ftpmaster behind the curtain)
--- End Message ---
