* gcov fails to work with shared library on 64bit platform
@ 2011-05-13 13:15 Mu Qiao
2011-05-13 14:50 ` Ian Lance Taylor
0 siblings, 1 reply; 4+ messages in thread
From: Mu Qiao @ 2011-05-13 13:15 UTC (permalink / raw)
To: gcc-help
Hello,
I have a C++ shared library project. When I add "--coverage" to
CXXFLAGS(I also added -g and -O0) and LDFLAGS, the project fails to
compile, here's the error message:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
.libs/variable_printer: hidden symbol `atexit' in
/usr/lib64/libc_nonshared.a(atexit.oS) is referenced by DSO
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
final link failed: Nonrepresentable section on output
collect2: ld returned 1 exit status
make[1]: *** [variable_printer] Error 1
make[1]: *** Waiting for unfinished jobs....
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
.libs/metadata_generator: hidden symbol `atexit' in
/usr/lib64/libc_nonshared.a(atexit.oS) is referenced by DSO
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
final link failed: Nonrepresentable section on output
collect2: ld returned 1 exit status
variable_printer and metadata_generator are two utilities that are
linked against the shared libraries. The above error only occurs on
64bit platform. It works fine on 32bit platform. I tried with
"configure --disable-shared" and it worked for us. But I don't know
the reason of the above error and can't be sure if --disable-shared is
the correct solution.
--
Best wishes,
Mu Qiao
GnuPG fingerprint: 92B1 B0C4 8D14 F8C4 EFA5 3ACC 30B3 0DE4 17B1 57E9
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: gcov fails to work with shared library on 64bit platform
2011-05-13 13:15 gcov fails to work with shared library on 64bit platform Mu Qiao
@ 2011-05-13 14:50 ` Ian Lance Taylor
2011-05-14 2:41 ` Mu Qiao
0 siblings, 1 reply; 4+ messages in thread
From: Ian Lance Taylor @ 2011-05-13 14:50 UTC (permalink / raw)
To: Mu Qiao; +Cc: gcc-help
Mu Qiao <qiaomuf@gmail.com> writes:
> I have a C++ shared library project. When I add "--coverage" to
> CXXFLAGS(I also added -g and -O0) and LDFLAGS, the project fails to
> compile, here's the error message:
>
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
> .libs/variable_printer: hidden symbol `atexit' in
> /usr/lib64/libc_nonshared.a(atexit.oS) is referenced by DSO
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
> final link failed: Nonrepresentable section on output
> collect2: ld returned 1 exit status
> make[1]: *** [variable_printer] Error 1
The linker message is not very helpful in that it doesn't tell us where
the hidden symbol is referenced from. At a guess, the reference is from
your C++ shared library. You can verify that by using "readelf -r" and
"readelf -s" on the shared library and looking for atexit. If you find
it there as an undefined symbol, then what is the command that you use
to build your shared library?
> I tried with
> "configure --disable-shared" and it worked for us. But I don't know
> the reason of the above error and can't be sure if --disable-shared is
> the correct solution.
Which configure script do you mean here? The gcc configure script or
yours?
Ian
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: gcov fails to work with shared library on 64bit platform
2011-05-13 14:50 ` Ian Lance Taylor
@ 2011-05-14 2:41 ` Mu Qiao
2011-05-14 6:18 ` Ian Lance Taylor
0 siblings, 1 reply; 4+ messages in thread
From: Mu Qiao @ 2011-05-14 2:41 UTC (permalink / raw)
To: Ian Lance Taylor; +Cc: gcc-help
On Fri, May 13, 2011 at 10:49 PM, Ian Lance Taylor <iant@google.com> wrote:
> Mu Qiao <qiaomuf@gmail.com> writes:
>
>> I have a C++ shared library project. When I add "--coverage" to
>> CXXFLAGS(I also added -g and -O0) and LDFLAGS, the project fails to
>> compile, here's the error message:
>>
>> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
>> .libs/variable_printer: hidden symbol `atexit' in
>> /usr/lib64/libc_nonshared.a(atexit.oS) is referenced by DSO
>> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
>> final link failed: Nonrepresentable section on output
>> collect2: ld returned 1 exit status
>> make[1]: *** [variable_printer] Error 1
>
> The linker message is not very helpful in that it doesn't tell us where
> the hidden symbol is referenced from. At a guess, the reference is from
> your C++ shared library. You can verify that by using "readelf -r" and
> "readelf -s" on the shared library and looking for atexit. If you find
> it there as an undefined symbol, then what is the command that you use
> to build your shared library?
>
I find this line in the output of readelf -s:
18447: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND atexit
These are the flags I used for compiling:
-D_GLIBCXX_DEBUG -std=c++0x -Wall -Wextra -Wold-style-cast
-Woverloaded-virtual -Wsign-promo -pedantic-errors -Werror --coverage
-fvisibility=hidden -fvisibility-inlines-hidden -g -fPIC -DPIC
This is the command for linking:
libtool: link: g++ -shared -nostdlib
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../lib64/crti.o
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/crtbeginS.o
src/.libs/libcppbash_la-libbash.o
src/.libs/libcppbash_la-cppbash_builtin.o
src/builtins/.libs/libcppbash_la-echo_builtin.o
src/builtins/.libs/libcppbash_la-source_builtin.o
src/builtins/.libs/libcppbash_la-return_builtin.o
src/builtins/.libs/libcppbash_la-inherit_builtin.o
.libs/libcppbash_la-libbashLexer.o .libs/libcppbash_la-libbashParser.o
src/core/.libs/libcppbash_la-interpreter.o
src/core/.libs/libcppbash_la-bash_ast.o -Wl,--whole-archive
./.libs/libwalker.a -Wl,--no-whole-archive -lantlr3c
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../lib64
-L/lib/../lib64 -L/usr/lib/../lib64
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/lib
-L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../.. -lstdc++ -lm -lc
-lgcc_s /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/crtendS.o
/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../lib64/crtn.o
--coverage -Wl,-soname -Wl,libcppbash.so.0 -o
.libs/libcppbash.so.0.0.0
I googled and some people say that -nostdlib in the linking command
caused the problem. But the command is run by libtool. I don't know
what to do with it except applying a patch.
>> I tried with
>> "configure --disable-shared" and it worked for us. But I don't know
>> the reason of the above error and can't be sure if --disable-shared is
>> the correct solution.
>
> Which configure script do you mean here? The gcc configure script or
> yours?
>
I mean my configure script. "configure --diable-shared" works fine on
both 32bit and 64bit machine.
--
Best wishes,
Mu Qiao
GnuPG fingerprint: 92B1 B0C4 8D14 F8C4 EFA5 3ACC 30B3 0DE4 17B1 57E9
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: gcov fails to work with shared library on 64bit platform
2011-05-14 2:41 ` Mu Qiao
@ 2011-05-14 6:18 ` Ian Lance Taylor
0 siblings, 0 replies; 4+ messages in thread
From: Ian Lance Taylor @ 2011-05-14 6:18 UTC (permalink / raw)
To: Mu Qiao; +Cc: gcc-help
Mu Qiao <qiaomuf@gmail.com> writes:
> On Fri, May 13, 2011 at 10:49 PM, Ian Lance Taylor <iant@google.com> wrote:
>> Mu Qiao <qiaomuf@gmail.com> writes:
>>
>>> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
>>> .libs/variable_printer: hidden symbol `atexit' in
>>> /usr/lib64/libc_nonshared.a(atexit.oS) is referenced by DSO
>>> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/bin/ld:
>>> final link failed: Nonrepresentable section on output
>>> collect2: ld returned 1 exit status
>>> make[1]: *** [variable_printer] Error 1
>>
>> The linker message is not very helpful in that it doesn't tell us where
>> the hidden symbol is referenced from. At a guess, the reference is from
>> your C++ shared library. You can verify that by using "readelf -r" and
>> "readelf -s" on the shared library and looking for atexit. If you find
>> it there as an undefined symbol, then what is the command that you use
>> to build your shared library?
>>
>
> I find this line in the output of readelf -s:
> 18447: 0000000000000000 0 NOTYPE GLOBAL DEFAULT UND atexit
>
> These are the flags I used for compiling:
> -D_GLIBCXX_DEBUG -std=c++0x -Wall -Wextra -Wold-style-cast
> -Woverloaded-virtual -Wsign-promo -pedantic-errors -Werror --coverage
> -fvisibility=hidden -fvisibility-inlines-hidden -g -fPIC -DPIC
>
> This is the command for linking:
>
> libtool: link: g++ -shared -nostdlib
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../lib64/crti.o
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/crtbeginS.o
> src/.libs/libcppbash_la-libbash.o
> src/.libs/libcppbash_la-cppbash_builtin.o
> src/builtins/.libs/libcppbash_la-echo_builtin.o
> src/builtins/.libs/libcppbash_la-source_builtin.o
> src/builtins/.libs/libcppbash_la-return_builtin.o
> src/builtins/.libs/libcppbash_la-inherit_builtin.o
> .libs/libcppbash_la-libbashLexer.o .libs/libcppbash_la-libbashParser.o
> src/core/.libs/libcppbash_la-interpreter.o
> src/core/.libs/libcppbash_la-bash_ast.o -Wl,--whole-archive
> ./.libs/libwalker.a -Wl,--no-whole-archive -lantlr3c
> -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2
> -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../lib64
> -L/lib/../lib64 -L/usr/lib/../lib64
> -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../x86_64-pc-linux-gnu/lib
> -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../.. -lstdc++ -lm -lc
> -lgcc_s /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/crtendS.o
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.2/../../../../lib64/crtn.o
> --coverage -Wl,-soname -Wl,libcppbash.so.0 -o
> .libs/libcppbash.so.0.0.0
>
> I googled and some people say that -nostdlib in the linking command
> caused the problem. But the command is run by libtool. I don't know
> what to do with it except applying a patch.
Yes, this problem is coming from -nostdlib. That is telling g++ to not
link against -lc, which means that there is no definition of atexit.
If this command is coming from libtool then you need to talk to the
libtool maintainers to find out why they are using -nostdlib. Or I
suppose you could explicitly link against -lc.
>>> I tried with
>>> "configure --disable-shared" and it worked for us. But I don't know
>>> the reason of the above error and can't be sure if --disable-shared is
>>> the correct solution.
>>
>> Which configure script do you mean here? The gcc configure script or
>> yours?
>>
>
> I mean my configure script. "configure --diable-shared" works fine on
> both 32bit and 64bit machine.
If this works for you, there is nothing wrong with doing that. Of
course, then you don't get a shared library.
Ian
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-05-14 6:18 UTC | newest]
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2011-05-13 13:15 gcov fails to work with shared library on 64bit platform Mu Qiao
2011-05-13 14:50 ` Ian Lance Taylor
2011-05-14 2:41 ` Mu Qiao
2011-05-14 6:18 ` Ian Lance Taylor
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