CODEWITHSUNDEEP
fortran
G_Yahia
G_Yahia

Reputation: 85

Library not found with fortran

I'm trying to compile a file using fortran and nag fortran library on a 32x machine works perfectly but doesn't work on a 64x one however the same program works on other 64x machines

everytime there is a message error /usr/bin/ld: cannot find -lnag

how can i solve this?

i'm adding some info about my problem

so this kind of additional error message 

/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.8/libnag.a when searching for -lnag

comes when i compile using

f77 d01dafe.f -lnag

but when compiling with 

f77 d01dafe.f -L/usr/lib/libnag.a

i get

d01dafe.o: in function « MAIN__ »:
fort77-2895-1.c:(.text+0xda): undefined reference to « d01daf_ »
fort77-2895-1.c:(.text+0x209): undefined reference to « d01daf_ »
collect2: error: ld returned 1 exit status

Upvotes: 0

Views: 1743

Answers (1)

MatCross
MatCross

Reputation: 389

The Users' Note (un.html) for your NAG Library gives details about how to access the Library. This file should have been installed (somewhere!) when your Library was installed. Notes for Marks 22, 23 and 24 are also available at http://www.nag.co.uk/numeric/fl/FLinuns.asp.

For example, from http://www.nag.co.uk/doc/inun/fl24/l6adfl/un.html#accessing (for the gfortran Library)

" To use the NAG Fortran Library and the supplied ACML libraries, you may link in the following manner:

gfortran -I[INSTALL_DIR]/nag_interface_blocks driver.f90 [INSTALL_DIR]/lib/libnag_acml.a [INSTALL_DIR]/acml/libacml_mp.a -lgomp

where driver.f90 is your application program;

or

gfortran -I[INSTALL_DIR]/nag_interface_blocks driver.f90 [INSTALL_DIR]/lib/libnag_acml.so [INSTALL_DIR]/acml/libacml_mp.so

if the shareable library is required. Please note that the shareable library is fully resolved so that you need not link against other run-time libraries explicitly; this requires the environment variable LD_LIBRARY_PATH to be set correctly at link time (see below).

However, if you prefer to link to a version of the NAG Library which does not require the use of ACML you may wish to use the self-contained libraries as follows:

gfortran -I[INSTALL_DIR]/nag_interface_blocks driver.f90 [INSTALL_DIR]/lib/libnag_nag.a

or

gfortran -I[INSTALL_DIR]/nag_interface_blocks driver.f90 [INSTALL_DIR]/lib/libnag_nag.so

if the shareable library is required. "

Note in particular that there is no libnag.a or libnag.so, so that just using -lnag will never work anyway. For access to the no-vendor Library (assuming your LD_LIBRARY_PATH is set correctly) you should probably be doing something like

f77 d01dafe.r -lnag_nag

Upvotes: 1

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