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: Dee <de...@de...> - 2011-11-16 17:51:00
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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 >>> >>> >>> >>> >> >> >> >> > > > > |
