topic gcc error while linking in Intel® Fortran Compiler

gcc error while linking

sandeep_01 — Fri, 27 May 2011 13:41:38 GMT

Hi,

I am using g++ to build my c++ code. I am using one library "libdbio.a" which is compiled in fortron complier ( intel, i think so). I have installed intel fortron composer XE2011 version on my suse10.4 64bit machine.

I am getting following linking error while linking the above mentioned library, please could you tell me what could be the problem.

g++ -O2 -Wall -I/Bala_backup/bala/Documents/XDB_Files_Linux -I/Bala_backup/bala/Documents/XDB_Files_Linux/OP2Writer -fPIC -o fno2xdb.x Common/FNO2XDBApp.o ./libdbio.a -L. -ldl /home/sandeep/Bala_backup/bala/Documents/XDB_Files_Linux/libfno2xdb.a ./libdbio.a
./libdbio.a(bioxxx.o): In function `bioxxx_routine':
/scratch/qasimtst/pb6/nastran1/util/dbio/bioxxx.c:(.text+0xf32): warning: the use of `tmpnam' is dangerous, better use `mkstemp'
./libdbio.a(dbopen.o): In function `dbopen_':
/scratch/qasimtst/pb6/nastran1/obj/em64tL/util/dbio/dbopen.f:(.text+0x7c7): undefined reference to `for_inquire'
./libdbio.a(dbvald.o): In function `dbvald_':
/scratch/qasimtst/pb6/nastran1/util/dbio/dbvald.c:(.text+0x50): undefined reference to `_intel_fast_memcpy'
./libdbio.a(dioerr.o): In function `dioerr_':
/scratch/qasimtst/pb6/nastran1/obj/em64tL/util/dbio/dioerr.f:(.text+0x1f8): undefined reference to `for_write_seq_fmt'
/scratch/qasimtst/pb6/nastran1/obj/em64tL/util/dbio/dioerr.f:(.text+0x233): undefined reference to `for_write_seq_fmt_xmit'
/scratch/qasimtst/pb6/nastran1/obj/em64tL/util/dbio/dioerr.f:(.text+0x2ab): undefined reference to `for_write_int_fmt'
/scratch/qasimtst/pb6/nastran1/obj/em64tL/util/dbio/dioerr.f:(.text+0x320): undefined reference to `for_write_seq_fmt'
/scratch/qasimtst/pb6/nastran1/obj/em64tL/util/dbio/dioerr.f:(.text+0x35b): undefined reference to `for_write_seq_fmt_xmit'
/scratch/qasimtst/pb6/nastran1/obj/em64tL/util/dbio/dioerr.f:(.text+0x3d3): undefined reference to `for_write_int_fmt'

Thank you very much..

Regards,

Sandeep

gcc error while linking

Udit_P_Intel — Fri, 27 May 2011 14:29:54 GMT

The for_write_* libraries are Intel runtime libraries, so it seems that g++ can not locate these runtime libraries. I think the other experts on these forums will be able to help you more with those libraries. But I will suggest that you use the Intel compiler to compile your C++ code as well. You should use the -nofor_main switch which will enable you to have the main program in the C++ code. Something like this MAY work:

ifort -nofor_main -warn all -I/Bala_backup/bala/Documents/XDB_Files_Linux -I/Bala_backup/bala/Documents/XDB_Files_Linux/OP2Writer -o fno2xdb.x Common/FNO2XDBApp.o

Also, experiment with the -fPIC flag.

Best!

-Udit

gcc error while linking

TimP — Fri, 27 May 2011 20:56:07 GMT

You will need to add all the libraries from the ifort installation which are referenced by your Fortran code. Often, it's simpler to use ifort in place of g++ to manage the link, adding -lstdc++ in order to satisfy g++.

gcc error while linking

sandeep_01 — Wed, 01 Jun 2011 07:56:54 GMT

thank you, very much TimP ..i supplied required ifort libs and it worked. thanks

gcc error while linking

sandeep_01 — Wed, 01 Jun 2011 07:59:07 GMT

thank you Udit, i tried but withought success, may be because i am new in the area and dint not explore all possibilities ..

Thank you very much for the promt reply.