help on ifort compiler

I have turned to ifort today, but with the same progs, when compiling,
it shows errors like this,
undefined reference to 's_copy'
.....................................'s_cmp'
and to 's_wsfe' 'do_fio', also

maybe it has some to do with the libs I build before with gcc, but now
how to fix this? thanks
--

Don't forget your dreamS

Nye <zuyingl@gmail.com> wrote:

> I have turned to ifort today, but with the same progs, when compiling,
> it shows errors like this,
> undefined reference to 's_copy'
> ....................................'s_cmp'
> and to 's_wsfe' 'do_fio', also
>
> maybe it has some to do with the libs I build before with gcc,

Yes, very likely. Libraries built for one compiler don't generally work
for another. These symptoms fit that scenario quite well.

> but now how to fix this?

Rebuild them with the compiler you are using now. Somehow, I think I
missed the real question here, but that's the answer to what you asked.

--
Richard Maine | Good judgment comes from experience;
email: my first.last at org.domain| experience comes from bad judgment.
org: nasa, domain: gov | -- Mark Twain

Nye wrote:
> I have turned to ifort today, but with the same progs, when compiling,
> it shows errors like this,
> undefined reference to 's_copy'
> ....................................'s_cmp'
> and to 's_wsfe' 'do_fio', also
>
> maybe it has some to do with the libs I build before with gcc, but now
> how to fix this? thanks

Richard Maine's advice is good if the libs you built were built with a
different Fortran compiler. But if you built them with the gcc C
compiler, then the answer is different and is addressed by the
following section of the ifort compiler release notes (always worth a
read - the guy who writes these is an absolute genius! :-))

Change in Linking Mixed Fortran-C++ Applications

Fortran applications are no longer linked against a C++ runtime library
by default. If the Intel Fortran driver ( ifort) is used to link mixed
C++ and Fortran applications, there are three switches that can be used
to specify linking against the correct libraries:

-cxxlib tells the ifort driver to link against the default C++
libraries on the system. If the GNU gcc version is lower than 3.2, the
older Intel C++ (Dinkumware*) libraries will be used, otherwise the
default GNU g++ libraries will be used. You can change the library
selection with one of the following two switches to be used in addition
to -cxxlib.

-cxxlib-icc specifies that the older Intel C++ (Dinkumware*) libraries
are to be used, regardless of the installed gcc version. Note that
current versions of the Intel® C++ Compiler use the gcc libraries by
default.

-cxxlib-gcc specifies that the GNU G++ libraries are to be used,
regardless of the installed gcc version. Note that link errors may
occur if the installed gcc lower than 3.2. You may also specify a path
to the gcc libraries you want used with the variant
-cxxlib-gcc=pathtolibs.

For example, if you were to use the ifort driver to link a
mixed-language application, your command line might be:

ifort prog.f90 prog_cpp_code.o -cxxlib -cxxlib-gcc


Steve Lionel
Developer Products Division
Intel Corporation
Nashua, NH

User communities for Intel Software Development Products
http://softwareforums.intel.com/
Intel Fortran Support
http://developer.intel.com/software/products/support/
My Fortran blog
http://www.intel.com/software/drfortran

Nye wrote:
> I have turned to ifort today, but with the same progs, when compiling,
> it shows errors like this,
> undefined reference to 's_copy'
> ....................................'s_cmp'
> and to 's_wsfe' 'do_fio', also
>
> maybe it has some to do with the libs I build before with gcc, but now
> how to fix this? thanks
Those are libf2c/libg2c Fortran run-time calls. You must have compiled
Fortran code with g77, or f2c and a C compiler. In general, it is not a
good idea to try to build an application with more than one Fortran
run-time library. If you have the Fortran source code, recompile
everything with ifort.