Build workload FDS using LLVM Flang

[MinchaoLiang]

Since llvm flang has not been successfully built before, I guess it is the installation failure. I am reinstalling llvm flang now. I have encountered an error. I don't know how to solve it. I have reinstalled it many times. I followed the steps on https://github.com/llvm/llvm-project/issues/56348 Everything was normal but ninja install, it failed like this:

CMake Error at projects/openmp/libompd/src/cmake_install.cmake:47 (file):
  file INSTALL cannot find
  "/home/lmc/Desktop/llvm-project/build-f18/lib/libompd.so": No such file or
  directory.
Call Stack (most recent call first):
  projects/openmp/libompd/cmake_install.cmake:42 (include)
  projects/openmp/cmake_install.cmake:43 (include)
  projects/cmake_install.cmake:42 (include)
  cmake_install.cmake:74 (include)

[PeixinQiao]

Can you try the following:

$ cd llvm-project
$ git reset --hard 109f9a291850a8e82f5026f68a382222a235c4f3
$ cd ../build-f18 && rm -rf *
$ cmake -G Ninja -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX=$installLLVMFlangPath -DLLVM_TARGETS_TO_BUILD="X86" -DLLVM_ENABLE_PROJECTS="clang;flang;mlir;openmp" ../llvm-project/llvm
$ ninja -j
$ ninja install

[MinchaoLiang]

I built the llvm flang and openmpi as https://github.com/llvm/llvm-project/issues/56348 said. As the steps in https://github.com/firemodels/fds/wiki/Compiling-FDS-with-GNU-Fortran-in-Ubuntu-Linux

$ git clone https://github.com/firemodels/fds.git
$ cd fds/Build/ompi_gnu_linux
$ ./make_fds.sh

I got the result as following:

Building ompi_gnu_linux
mpifort -c -m64 -O2 -std=f2018 -frecursive -ffpe-summary=none -fall-intrinsics -cpp -DGITHASH_PP=\"FDS6.7.9-464-g480dada2a-master\" -DGITDATE_PP=\""Fri Sep 9 16:23:18 2022 -0400\"" -DBUILDDATE_PP=\""Sep 14, 2022  16:06:50\"" -DCOMPVER_PP=\""Gnu gfortran 9.4.0-1ubuntu1~20.04.1)"\"   ../../Source/prec.f90
mpifort -c -m64 -O2 -std=f2018 -frecursive -ffpe-summary=none -fall-intrinsics -cpp -DGITHASH_PP=\"FDS6.7.9-464-g480dada2a-master\" -DGITDATE_PP=\""Fri Sep 9 16:23:18 2022 -0400\"" -DBUILDDATE_PP=\""Sep 14, 2022  16:06:50\"" -DCOMPVER_PP=\""Gnu gfortran 9.4.0-1ubuntu1~20.04.1)"\"   ../../Source/imkl.f90
flang-newflang-new: : errorerror: : unknown argument: '-ffpe-summary=none'unknown argument: '-ffpe-summary=none'

make: *** [../makefile:135：prec.o] 错误 1
make: *** 正在等待未完成的任务....
make: *** [../makefile:135：imkl.o] 错误 1

Then I modify the makefile removed -ffpe-summary=none $ sed -i "/-ffpe-summary=none/d" ../makefile It erred again

Building ompi_gnu_linux
mpifort -c -mabi=lp64 -march=armv8.2-a -mtune=tsv110 -O3 -flto -std=f2018 -frecursive -fall-intrinsics -cpp -DGITHASH_PP=\"FDS6.7.9-464-g480dada2a-master\" -DGITDATE_PP=\""Fri Sep 9 16:23:18 2022 -0400\"" -DBUILDDATE_PP=\""Sep 15, 2022  21:39:31\"" -DCOMPVER_PP=\""Gnu gfortran 9.4.0-1ubuntu1~20.04.1)"\"   ../../Source/cons.f90
flang-new: warning: argument unused during compilation: '-flang-experimental-exec'
flang-new: warning: argument unused during compilation: '-mtune=tsv110'
flang-new: warning: argument unused during compilation: '-frecursive'
flang-new: warning: argument unused during compilation: '-fall-intrinsics'
flang-new: warning: argument unused during compilation: '-pthread'
error: Semantic errors in ../../Source/cons.f90
./../../Source/cons.f90:9:5: error: Cannot read module file for module 'mpi_f08': Source file 'mpi_f08.mod' was not found
  USE MPI_F08
      ^^^^^^^
./../../Source/cons.f90:359:7: error: Derived type 'mpi_comm' not found
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_NEIGHBORS       !< MPI communicator for the a given mesh and its neighbors
        ^^^^^^^^
./../../Source/cons.f90:359:47: error: No explicit type declared for 'mpi_comm_neighbors'
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_NEIGHBORS       !< MPI communicator for the a given mesh and its neighbors
                                                ^^^^^^^^^^^^^^^^^^
./../../Source/cons.f90:360:7: error: Derived type 'mpi_comm' not found
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_CLOSE_NEIGHBORS !< MPI communicator for the a given mesh and its neighbors
        ^^^^^^^^
./../../Source/cons.f90:360:47: error: No explicit type declared for 'mpi_comm_close_neighbors'
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_CLOSE_NEIGHBORS !< MPI communicator for the a given mesh and its neighbors
                                                ^^^^^^^^^^^^^^^^^^^^^^^^
make: *** [../makefile:135：cons.o] 错误 1

The mpifort is exported now,but the problem still exists.

[MinchaoLiang]

About the last problem,I found the similar one in https://stackoverflow.com/questions/65750862/mpi-fortran-support-through-the-mpi-f08-module-with-gfortran# .It seems I have to update the gfortran version to gfortran-10,but I should use flang rather than gfortran. According to https://github.com/firemodels/fds/wiki/FDS-Compilation .There are only methods compiled with Gnu Fortran and Intel oneAPI. This project also does not provide compilation scripts for other compilers.Maybe I have to modify the makefile to compile with flang,but I don't know how to modify it, because the file is too complex.

[PeixinQiao]

@MinchaoLiang No need to modify Makefile for now. What errors or outputs did you get when you build this workload after you export the environments of Flang and OpenMPI?

[MinchaoLiang]

The error is still as following:

Building ompi_gnu_linux
mpifort -c -mabi=lp64 -march=armv8.2-a -mtune=tsv110 -O3 -flto -std=f2018 -frecursive -fall-intrinsics -cpp -DGITHASH_PP=\"FDS6.7.9-464-g480dada2a-master\" -DGITDATE_PP=\""Fri Sep 9 16:23:18 2022 -0400\"" -DBUILDDATE_PP=\""Sep 15, 2022  21:39:31\"" -DCOMPVER_PP=\""Gnu gfortran 9.4.0-1ubuntu1~20.04.1)"\"   ../../Source/cons.f90
flang-new: warning: argument unused during compilation: '-flang-experimental-exec'
flang-new: warning: argument unused during compilation: '-mtune=tsv110'
flang-new: warning: argument unused during compilation: '-frecursive'
flang-new: warning: argument unused during compilation: '-fall-intrinsics'
flang-new: warning: argument unused during compilation: '-pthread'
error: Semantic errors in ../../Source/cons.f90
./../../Source/cons.f90:9:5: error: Cannot read module file for module 'mpi_f08': Source file 'mpi_f08.mod' was not found
  USE MPI_F08
      ^^^^^^^
./../../Source/cons.f90:359:7: error: Derived type 'mpi_comm' not found
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_NEIGHBORS       !< MPI communicator for the a given mesh and its neighbors
        ^^^^^^^^
./../../Source/cons.f90:359:47: error: No explicit type declared for 'mpi_comm_neighbors'
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_NEIGHBORS       !< MPI communicator for the a given mesh and its neighbors
                                                ^^^^^^^^^^^^^^^^^^
./../../Source/cons.f90:360:7: error: Derived type 'mpi_comm' not found
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_CLOSE_NEIGHBORS !< MPI communicator for the a given mesh and its neighbors
        ^^^^^^^^
./../../Source/cons.f90:360:47: error: No explicit type declared for 'mpi_comm_close_neighbors'
  TYPE (MPI_COMM), ALLOCATABLE, DIMENSION(:) :: MPI_COMM_CLOSE_NEIGHBORS !< MPI communicator for the a given mesh and its neighbors
                                                ^^^^^^^^^^^^^^^^^^^^^^^^
make: *** [../makefile:135：cons.o] 错误 1

[PeixinQiao]

@Wang-Zhewei