| Issue |
83633
|
| Summary |
-flang-experimental-polymorphism breaks OpenMPI build
|
| Labels |
|
| Assignees |
jeanPerier
|
| Reporter |
jdenny-ornl
|
I am building [OpenMPI 5.0.2](https://www.open-mpi.org/software/) using Clang and Flang. The build started failing at 325f51237252, which enabled `-flang-experimental-polymorphism` by default. The build was successful at the previous commit.
This is my build procedure for OpenMPI:
```
$ mkdir build && cd build
$ CC=clang CXX=clang++ FC=flang-new \
CFLAGS="-O3" CXXFLAGS="-O3" FCFLAGS="-O3" \
../configure --prefix=$PWD/../install \
--without-knem --without-ucx --enable-pretty-print-stacktrace \
--enable-orterun-prefix-by-default --enable-mpi1-compatibility
$ make -j
$ make install
```
The error at 325f51237252 is:
```
error: loc("/home/jdenny/openmpi-5.0.2/build/ompi/mpi/fortran/use-mpi-f08/profile/paccumulate_f08.F90":30:4): /home/jdenny/llvm/flang/lib/Lower/ConvertCall.cpp:2409: not yet implemented: assumed type actual argument
```
I'm not aware of any use of assumed types in the associated code, but my fortran experience is limited, so please advise if I misunderstood something.
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