[Jasfss]

I posted this as an add-on in another thread yesterday, but figured I'd make a separate thread for this issue.

I initially had a simple build of SU2 on my Ubuntu machine, done by doing ./configure and all the make/install without flags, and that worked fine, but I now am trying to speed up my computing time a little.

So, in attempting to do a clean install of SU2, doing ./configure with enabling mpi and pointing to an mpi cxx directory (/usr/include/mpi), I get the following (along with some other fine stuff):

checking whether the C++ compiler works... no
configure: error: in `/home/mls0027/SU2':
configure: error: C++ compiler cannot create executables
See `config.log' for more details

I then check config.log, and find where it has the issue:

configure:3389: $? = 126
configure:3427: result: no
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "SU2"
| #define PACKAGE_TARNAME "SU2"
| #define PACKAGE_VERSION "4.2.0"
| #define PACKAGE_STRING "SU2 4.2.0"
| #define PACKAGE_BUGREPORT "su2code-dev@lists.stanford.edu"
| #define PACKAGE_URL "https://github.com/su2code"
| #define PACKAGE "SU2"
| #define VERSION "4.2.0"
| /* end confdefs.h. */

Finally, from there, I go into the configure file to line 3427's section and see:

if test -z "$ac_file"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5

{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
as_fn_error 77 "C++ compiler cannot create executables
See \`config.log' for more details" "$LINENO" 5; }

This doesn't really shed any light for me. I've checked to see that I do indeed have c++ compilers working, and gone through all updates, upgrades, and checks for essential builds etc. Really hoping someone here knows the deal.

[Jasfss]

Ok, I fixed it. For anyone else who is struggling with this issue, make sure you're linking to the /usr/bin/mpicc and /usr/bin/mpicxx rather than anywhere else

[hlk]

Originally Posted by Jasfss

Ok, I fixed it. For anyone else who is struggling with this issue, make sure you're linking to the /usr/bin/mpicc and /usr/bin/mpicxx rather than anywhere else

Thanks for posting the solution - you do indeed need to link to the mpi compilers (or have your $PATH set up so that they are found automatically) when compiling for parallel.

[brazdj]

Thanks for posting your solution