ifc 8.1 on Opteron (RH FC2)

[mqk]

Is it possible to use the version 8.1 Fortran and C++ compilers on a 64bit Opteron system?

I'm having a problem similar to what was described in the past
"ifc with SuSE 8.2 64bits" thread, however the solution described there doesn't work for me.

$ ifort -c hello_world.f

$ ifort -v hello_world.o -o hello_world
Version 8.1
ld    /usr/lib/crt1.o /usr/lib/crti.o /usr/local/intel/intel_fc_80/lib/crtxi.o 
-dynamic-linker /lib/ld-linux.so.2 -m elf_i386 -o hello_world 
/usr/local/intel/intel_fc_80/lib/for_main.o hello_world.o -Qy 
-L/usr/local/intel/intel_fc_80/lib -L/usr/lib -Bstatic -lifport -lifcore -limf 
-Bdynamic -lm -lcxa -Bstatic -lirc -Bdynamic -lunwind -lc -Bstatic -lirc_s 
/usr/local/intel/intel_fc_80/lib/crtxn.o /usr/lib/crtn.o
ld: skipping incompatible /usr/lib64/libm.so when searching for -lm
ld: skipping incompatible /usr/lib64/libm.a when searching for -lm
ld: cannot find -lm

Note that the "-m elf_i386" was automatically passed to the linker, no need to specify it with -Wl.

Here's what I tried so far:

I have on my system a file called /lib/libm.so.6, which is a symlink to /lib/libm-2.3.3.so.
When I created a link to this file at /usr/lib/libm.so, the above error message was
replaced with a complaint about "incompatible /usr/lib64/libc.so". So then I created a
symlink from /lib/libc.so.6 to /usr/lib/libc.so, but then I get the following error:

ld: /usr/lib/crtn.o: No such file: No such file or directory 

Creating a symlink from /usr/lib64/crtn.o to /usr/lib/crtn.o caused these errors:

ld: warning: i386:x86-64 architecture of input file `/usr/lib/crt1.o' is
incompatible with i386 output
ld: warning: i386:x86-64 architecture of input file `/usr/lib/crti.o' is
incompatible with i386 output
ld: warning: i386:x86-64 architecture of input file `/usr/lib/crtn.o' is
incompatible with i386 output
/usr/lib/crt1.o(.text+0x13): In function `_start':
: undefined reference to `__libc_csu_fini'
/usr/lib/crt1.o(.text+0x1a): In function `_start':
: undefined reference to `__libc_csu_init'

At this point I gave up. :(


Here's info about my set-up, a fedora core 2 box:

$ uname -a
Linux habanero.ucolick.org 2.6.8-1.521smp #1 SMP Mon Aug 16 09:32:47
EDT 2004 x86_64 x86_64 x86_64 GNU/Linux

$ ifort -V
Intel Fortran Compiler for 32-bit applications, Version 8.1    
Build 20040803Z Package ID: l_fc_p_8.1.018
Copyright (C) 1985-2004 Intel Corporation.  All rights reserved.

Thanks for any help you might have.

mike

[TimP]

Did you verify that you have a working 32-bit gcc installation, by running something compiled by gcc -m32? I haven't seen FC2 installation, but with EL3 there are "legacy" and compatibility compilers and libraries which have the required 32-bit support required by the Intel 32-bit compilers. If you use the 64-bit compilers, you won't need the 32-bit support.

[mqk]

Hey thanks for pointing me in the right direction!

It turned out I indeed did not have a working 32-bit gcc installation. This was remedied by installing glibc-devel.i386.
Now I have all the required libraries for "gcc -m32" to work, and icc/ifort also work now.