Re: [Lapackpp-devel] question of including lapack++ in my makefile
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Re: [Lapackpp-devel] question of including lapack++ in my makefile
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From: Abraham Chang-T. L. <cha...@cm...> - 2011-11-16 21:28:18
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Dear Dominik,
I try what you indicate, it works on my machine! However, the following
shows that main.exe cannot find liblapackpp.so.14.
[changtsl@cee-changtsl EIG]$ ldd main.exe
linux-vdso.so.1 => (0x00007fff2e7fd000)
liblapackpp.so.14 => not found
libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x000000375a400000)
libm.so.6 => /lib64/libm.so.6 (0x0000003753c00000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x0000003759c00000)
libc.so.6 => /lib64/libc.so.6 (0x0000003753800000)
/lib64/ld-linux-x86-64.so.2 (0x0000003753400000)
But when listing the content of /lib, it is obvious that
"liblapackpp.so.14" exists. "liblapackpp.so.14" is actually a link to
"liblapackpp.so.14.2.0".
[changtsl@cee-changtsl EIG]$ ls /home/changtsl/lapackpp_lib/lib
liblapackpp.la liblapackpp.so.14 pkgconfig
liblapackpp.so liblapackpp.so.14.2.0
How come main.exe cannot find "liblapackpp.so.14"?
I try the same thing on another machine where lapackpp is located in
/usr/local/packages/lapackpp
by
$ g++ -c -I/usr/local/packages/lapackpp/include/lapackpp main.cpp
$ g++ -L/usr/local/packages/lapackpp/lib -llapackpp main.o -o main.exe
$ LD_LIBRARY_PATH=/usr/local/packages/lapackpp/lib ./main.exe
then it shows
./main.exe: error while loading shared libraries: libmkl_intel_ilp64.so:
cannot open shared object file: No such file or directory
The libraries that main.exe can search are
linux-vdso.so.1 => (0x00007fff6f9ff000)
liblapackpp.so.14 => not found
libstdc++.so.6 => /usr/X11R6/lib64/libstdc++.so.6 (0x00007ffa83942000)
libm.so.6 => /lib64/libm.so.6 (0x00007ffa836ec000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007ffa834d5000)
libc.so.6 => /lib64/libc.so.6 (0x00007ffa83177000)
/lib64/ld-linux-x86-64.so.2 (0x00007ffa83c4d000)
I am wondering, on both machines, "liblapackpp.so.14" indeed exists in the
appropriate directories, but the "main.exe"s cannot find it out?
I am also wondering why the "LD_LIBRARY_PATH=" command works on my own
machine but doesn't work on the other machine?
Thank you very much.
Sincerely,
changtsan
On Wed, November 16, 2011 15:47, Dee wrote:
Dear changtsan,
please do start the command from the command line itself:
$ ./makefile
$ LD_LIBRARY_PATH=/home/changtsl/lapackpp_lib/lib ./main.exe
Usually you do not start a programm with a real makefile. (But of course
you do not have a real Makefile.)
If this doesn't work, you could display what libraries are searched for
and where they are found:
$ ldd main.exe
Further please list the content of the lib-folder:
$ ls /home/changtsl/lapackpp_lib/lib
With regards
Dominik
-------- Original-Nachricht --------
Betreff: Re: [Lapackpp-devel] question of including lapack++ in my makefile
Von: Abraham Chang-Tsan Lu <cha...@cm...>
An: lap...@li...
Datum: 16.11.2011 21:42
> Dear Dominik,
>
>
> Sorry for taking you so much time.
> My makefile now is
>
>
> # main.o : main.cpp
> g++ -c -I/home/changtsl/lapackpp_lib/include/lapackpp main.cpp # main.exe :
> main.o g++ -L/home/changtsl/lapackpp_lib/lib -llapackpp main.o -o main.exe
>
>
> date LD_LIBRARY_PATH=/home/changtsl/lapackpp_lib/lib ./main.exe
> echo finished /bin/echo -e "\a"
> date
>
> But the error is still the same:
>
>
> [changtsl@cee-changtsl EIG]$ ./makefile
> Wed Nov 16 15:35:56 EST 2011
> ./main.exe: error while loading shared libraries: liblapackpp.so.14:
> cannot open shared object file: No such file or directory finished
>
> Thank you for your help and patience.
>
>
> Sincerely,
> changtsan
>
>
> On Wed, November 16, 2011 15:28, Dee wrote:
> Dear changtsan,
>
>
> okay, next try:
>
> LD_LIBRARY_PATH=/home/changtsl/lapackpp_lib/lib ./make.exe
>
>
> With regards
> Dominik
>
>
> -------- Original-Nachricht --------
> Betreff: Re: [Lapackpp-devel] question of including lapack++ in my
> makefile Von: Abraham Chang-Tsan Lu <cha...@cm...>
> An: lap...@li...
> Datum: 16.11.2011 20:29
>
>
>> Dear Dominik,
>>
>>
>>
>> I really appreciate your help. I follow what you indicated, it shows
>>
>>
>>
>> [changtsl@cee-changtsl EIG]$ ./makefile
>> g++: unrecognized option '-R/home/changtsl/lapackpp_lib/lib'
>> Wed Nov 16 13:24:07 EST 2011
>> ./main.exe: error while loading shared libraries: liblapackpp.so.14:
>> cannot open shared object file: No such file or directory finished
>>
>> and
>>
>> [changtsl@cee-changtsl EIG]$ ./makefile
>> g++: unrecognized option '-R.'
>> Wed Nov 16 13:14:45 EST 2011
>> ./main.exe: error while loading shared libraries: liblapackpp.so.14:
>> cannot open shared object file: No such file or directory finished
>>
>> It seems that my machine doesn't recognize the command -R. The OS on my
>> machine is RedHat linux. Thank you.
>>
>> Sincerely,
>> changtsan
>>
>>
>>
>> On Wed, November 16, 2011 12:50, Dee wrote:
>> Dear changtsan,
>>
>>
>>
>> the path in the makefile (behind the -L) is not important for the
>> execution of the program.
>>
>> But because of the "exe" I thought you are using Windows. But as I see
>> now you use Linux or something like it. So you need to tell the
>> application where the library is located because Linux does not search
>> in the current directory as default (and you shouldn't change it for
>> security reasons).
>>
>> There are some ways to solve this problem. See
>> http://www.eyrie.org/~eagle/notes/rpath.html for example in using the
>> "-R" option when linking the binary (the line with the -L in it):
>>
>>
>>
>> g++ -R/home/changtsl/lapackpp_lib/lib -L/home/changtsl/lapackpp_lib/lib
>> -llapackpp main.o -o main.exe
>>
>>
>>
>> But pay attention, that the main.exe will only work on your system (or
>> at least on any system that has the library in this path or in the
>> global path defined by LD_LIBRARY_PATH).
>>
>> So you could also link the main.exe via
>>
>>
>>
>> g++ -R. -L/home/changtsl/lapackpp_lib/lib -llapackpp main.o -o main.exe
>>
>>
>> so the library will first be searched in the local directory. (You need
>> to copy the so-files in the same directory as the main.exe of course.)
>>
>> With regards
>> Dominik
>>
>>
>>
>>
>> -------- Original-Nachricht --------
>> Betreff: Re: [Lapackpp-devel] question of including lapack++ in my
>> makefile Von: Abraham Chang-Tsan Lu <cha...@cm...> An:
>> lap...@li... Datum: 16.11.2011 18:34
>>
>>
>>
>>> Dear Dominik,
>>>
>>>
>>>
>>>
>>> I copy the whole file folder "lapackpp_lib" to the directory where
>>> main.exe is, but the same error message is shown. Do I have to change
>>> the path of lapackpp_lib in the makefile? Thank you.
>>>
>>>
>>> Sincerely,
>>> changtsan
>>>
>>>
>>>
>>> On Wed, November 16, 2011 11:28, Dee wrote:
>>> Dear changtsan,
>>>
>>>
>>>
>>>
>>> You link lapackpp-Library dynamically to your main.exe. This means
>>> everybody who wants to start main.exe needs to have the lapackpp-Lib
>>> somewhere in his execution path.
>>>
>>> The easiest way tol solve this is to copy the library in the same
>>> directory as the exe. Then the programm should execute fine.
>>>
>>> With regards
>>> Dominik
>>>
>>>
>>>
>>>
>>>
>>> -------- Original-Nachricht --------
>>> Betreff: Re: [Lapackpp-devel] question of including lapack++ in my
>>> makefile Von: Abraham Chang-Tsan Lu <cha...@cm...> An:
>>> lap...@li... Datum: 16.11.2011 17:25
>>>
>>>
>>>
>>>> Hi Dominik,
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Thank you very much. I try to follow your indication, so now the
>>>> content of my makefile now is
>>>>
>>>> g++ -c -I/home/changtsl/lapackpp_lib/include/lapackpp main.cpp g++
>>>> -L/home/changtsl/lapackpp_lib/lib -llapackpp main.o -o main.exe
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> I think the file "main.o" and "main.exe" are produced successfully.
>>>> But
>>>> when I execut "main.exe", the error message shows
>>>>
>>>> [changtsl@cee-changtsl EIG]$ ./main.exe
>>>> ./main.exe: error while loading shared libraries: liblapackpp.so.14:
>>>> cannot open shared object file: No such file or directory
>>>>
>>>> What should I do then? Thank you very much.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Sincerely,
>>>> changtsan
>>>>
>>>>
>>>>
>>>> On Tue, November 15, 2011 16:04, Dee wrote:
>>>> Dear changtsan,
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> first: Please do not write directly to the responder but to the
>>>> mailing list so that everyone can read your further questions.
>>>> (Usually you
>>>> set the responder as CC, if you wish to.)
>>>>
>>>> Concerning your question: It's better to link the library when
>>>> building the exe:
>>>>
>>>> g++ -L/home/changtsl/lapackpp_lib/lib -llapackpp main.o -o main.exe
>>>>
>>>>
>>>> So you should delete the second g++-line in your makefile and
>>>> change the third to the one above.
>>>>
>>>> With regards
>>>> Dominik
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> -------- Original-Nachricht --------
>>>> Betreff: Re: [Lapackpp-devel] question of including lapack++ in my
>>>> makefile Von: Abraham Chang-Tsan Lu <cha...@cm...> An: Dee
>>>> <de...@de...>
>>>> Datum: 14.11.2011 16:24
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>> Hi Dominik,
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Thank you for your reply, and I am sorry to bother you again. I
>>>>> don't know much about makefile, so the questions I am going to ask
>>>>> below may be stupid.
>>>>>
>>>>> From the website you indicated, I see one line saying
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> gcc -L/usr/local/lib -llapackpp foo.o
>>>>>
>>>>> Does the "lib" here refers to the "lib" under /lapackpp_lib?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> I have attached the updated makefile and error.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Thank you very much.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Sincerely,
>>>>> changtsan
>>>>>
>>>>>
>>>>>
>>>>> On Sat, November 12, 2011 02:18, Dee wrote:
>>>>> Hello,
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> you forgot to link the Lapack-library in your Makefile. Please
>>>>> see chapter "Library Usage" on http://lapackpp.sourceforge.net/
>>>>>
>>>>>
>>>>>
>>>>> With regards
>>>>> Dominik
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> -------- Original-Nachricht --------
>>>>> Betreff: [Lapackpp-devel] question of including lapack++ in my
>>>>> makefile Von: Abraham Chang-Tsan Lu <cha...@cm...> An:
>>>>> lap...@li... Datum: 12.11.2011 00:18
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> Dear Lapack++ Developer,
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> I have some trouble in including lapack++ in my makefile.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On my machine, Lapack++ is under the directory of
>>>>>> /home/changtsl/lapackpp-2.5.4
>>>>>> and /home/changtsl/lapackpp_lib.
>>>>>>
>>>>>>
>>>>>> I have attached my code, makefile, and the error message given
>>>>>> in the terminal. The code is very short and only for testing.
>>>>>> Would
>>>>>> you please help me to solve the problem? Thank you very much.
>>>>>>
>>>>>> Sincerely,
>>>>>> changtsan
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ---------------------------------------------------------------
>>>>>> --
>>>>>> --
>>>>>> --
>>>>>> --
>>>>>> --
>>>>>> -----
>>>>>> RSA(R) Conference 2012
>>>>>> Save $700 by Nov 18
>>>>>> Register now
>>>>>> http://p.sf.net/sfu/rsa-sfdev2dev1
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> lapackpp-devel mailing list lap...@li...
>>>>>> https://lists.sourceforge.net/lists/listinfo/lapackpp-devel
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
--
Abraham Chang-Tsan Lu
Civil and Environmental Engineering
Carnegie Mellon University
Pittsburgh, PA, 15213
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