Re: [EXTERNAL] [OMPI users] configure failed of openmpi-5.0.10 with the 2026.0.0 icx and ifx compilers in Fedora 44

Wed, 17 Jun 2026 06:15:35 -0700 

 Dear Pritchard et al.,

Many thanks for the suggestions. It is fixed now.
The problem with the Fedora 44 case was the missing flags 

CPLUS_INCLUDE_PATH and --gcc-install-dir.

With its definitions, the configure step is ok:
// export CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH:/usr/include/c++/16/x86_64-redhat-linux 
// source /opt/intel/oneapi/setvars.sh
// icpx --gcc-install-dir=/usr/lib/gcc/x86_64-redhat-linux/16 -o test-cpp.exe test-cpp.cpp 
// ./test-cpp.exe
//   Standard C++ works on Fedora 44!
//   icpx is working!
//
#include <iostream>
int main() {
    std::cout << "  Standard C++ works on Fedora 44!" << std::endl;
    std::cout << "  icpx is working!" << std::endl;
    return 0;
}

~/TMP $ which icpx
/opt/intel/oneapi/compiler/2026.0/bin/icpx

~/TMP $ icpx -I/usr/include  -o test-cpp.exe test-cpp.cpp

~/TMP $ test-cpp.exe 
  Standard C++ works on Fedora 44!
  icpx is working!

and also the next bulding phase:

~/TMP $ which mpifort
/opt/openmpi/bin/mpifort
~/TMP $ mpifort -O2 -o test-mpi-0010.exe test-mpi-0010.f90
~/TMP $ mpirun --machinefile ~/machi-intel.dat --np 6 test-mpi-0010.exe
  MPI_VERSION    :            3
  MPI_SUBVERSION :        1
  mpi_started    :  T
  hellow from            4  of            6
  hellow from            2  of            6
  hellow from            0  of            6
  hellow from            5  of            6
  hellow from            1  of            6
  hellow from            3  of            6

Regards,
Jorge D'Elia.
"'Pritchard Jr., Howard' via Open MPI users" <[email protected]> escribió: 


Hi Jorge,
Okay this looks more like its failing now with something that may be due to your workarounds for linking: 

10349 configure:20091: checking if C and C++ are link compatible
10350 configure:20114: icx -c -O3 -DNDEBUG  -finline-functions  conftest_c.c
10351 configure:20117: $? = 0
10352 configure:20145: icpx -o conftest -DNDEBUG    conftest.cpp conftest_c.o  >&5 10353 /usr/x86_64-linux-gnu/bin/ld: cannot find -lstdc++: No such file or directory 10354 icpx: error: linker command failed with exit code 1 (use -v to see invocation) 
10355 configure:20145: $? = 1
10356 configure: failed program was:
I'd suggest trying to build some simple non-MPI  c++  and c tests you build with icpx and icx respectively then try to link using icpx. This sounds like a problem better directed toward one of the One API community lists. 

Howard
On 6/15/26, 3:51 PM, "[email protected] <mailto:[email protected]> on behalf of [email protected] <mailto:[email protected]>" <[email protected] <mailto:[email protected]> on behalf of [email protected] <mailto:[email protected]>> wrote: 

Hi Howard,

"'Pritchard Jr., Howard' via Open MPI users"
<[email protected] <mailto:[email protected]>> escribió:
 


Hi Jorge,

Your config.log has these lines:

configure:10133: checking whether the C compiler works
configure:10155: icx -DNDEBUG '-O3' conftest.c >&5
icx: error: no such file or directory: ''-O3''
configure:10159: $? = 1
configure:10199: result: no
configure: failed program was:

The problem seems to be that somehow the "-O3" you are using on the
command line gets mangled into '-O3' for the compiler. The compiler
doesn't understand that.
Maybe try again without the CFLAGS, etc. being specified on the
configure line?

Also make sure to use CXX=icpx
Otherwise the configure will fail somewhere else.


Ok. Then, I temporarily try with a new configuration:

unset CC
unset CXX
unset FC
options="CC=icx CXX=icpx FC=ifx --prefix=${PREFIX}
--with-prrte=internal --with-pmix=internal --with-ucx --without-verbs
--without-libfabric --without-xpmem"

and I have attached the resulting config.log.gz file.

THANKS.

Regards
Jorge.
On 6/15/26, 1:52 PM, "[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>> on behalf of [email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>" <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>> on behalf of [email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> 
wrote:

Hi Howard,
Thanks for replying. I am sorry, I did not have any luck with the suggestion. There are no significant changes. I have attached the new config.log.gz file. 
I suspect problems, perhaps, related to the symbolic link
ln -s /usr/lib64/libgcc_s.so.1
/usr/x86_64-linux-gnu/lib/https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1] <https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1]> <https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1] <https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1]>> 
.
So, please, do you have any other suggestions?

Regards,
Jorge.

"'Pritchard Jr., Howard' via Open MPI users"
<[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> escribió: 
 


Hi,

Could you try modifying your configure command to be something like this?
./configure CC=icx CXX=icpx FC=ifx CFLAGS="-O3" CXXFLAGS="-O3" FCFLAGS="-O3" 

This works for me. I am using a somewhat older one api compiler
suite however:

icx --version
Intel(R) oneAPI DPC++/C++ Compiler 2023.2.0 (2023.2.0.20230622)

Howard
From: <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> 
on behalf of
"[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>" <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> 
Reply-To: "[email protected] <mailto:[email protected]>
<mailto:[email protected] <mailto:[email protected]>>" <[email protected] <mailto:[email protected]> 
<mailto:[email protected] <mailto:[email protected]>>>
Date: Monday, June 15, 2026 at 7:40 AM
To: Open MPI Users <[email protected] <mailto:[email protected]> 
<mailto:[email protected] <mailto:[email protected]>>>
Subject: [EXTERNAL] [OMPI users] configure failed of openmpi-5.0.10
with the 2026.0.0 icx and ifx compilers in Fedora 44

Der all,

I cannot configure openmpi-5.010 with the 2026.0.0 icx+ifx compilers in
Fedora Linux 44 (Workstation Edition) system (altough an alternative
version with gcc+gfortran is ok).

It is worth noting that during the installation of the icx/ifx
compilers, I had to add the line:
ln -s /usr/lib64/libgcc_s.so.1
/usr/x86_64-linux-gnu/lib/https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1] <https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1]> <https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1] <https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I$[1]>> 
.

Please, any suggestions on how to resolve the issues listed in the
attached file?
Thank you in advance.

Regards.
Jorge D'Elia.

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Vínculos:
---------
[1] https://urldefense.com/v3/__http://libgcc_s.so__;!!Bt8fGhp8LhKGRg!BNmpId7wlYNL0cBzB6JFJoldka0u-PJ_-F6WoFuHDoHIUzLn-u6nJVNV1dRStKwE2uLT0Wp4XCiB8RoHLblR65I%24 

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