system interrogation for mpi/etc

src/core/def/.gitignore

@@ -0,0 +1 @@
+_gen*

src/core/def/mpi.hpp

@@ -0,0 +1,16 @@
+
+// DO NOT INCLUDE MPI MANUALLY! USE THIS FILE!
+
+#if __has_include("core/def/_gen_mpi.hpp")
+#include "core/def/_gen_mpi.hpp"
+#else
+// Not always an issue, but not recommended
+#endif
+
+#include "core/def/pragma_disable.hpp"
+
+// clang-format off
+DISABLE_WARNING(cast-function-type, bad-function-cast, 42)
+#include "mpi.h"
+ENABLE_WARNING(cast-function-type, bad-function-cast, 42)
+// clang-format on

src/core/utilities/mpi_utils.hpp

@@ -9,13 +9,8 @@
 #include <cstring>
 #include <exception>
 
-// clang-format off
-#include "initializer/pragma_disable.hpp"
-DISABLE_WARNING(cast-function-type, bad-function-cast, 42)
-#include "mpi.h"
-ENABLE_WARNING(cast-function-type, bad-function-cast, 42)
-// clang-format on
 
+#include "core/def/mpi.hpp"
 #include "core/utilities/span.hpp"
 #include "core/utilities/types.hpp"
 

src/initializer/python_data_provider.hpp

@@ -7,7 +7,7 @@
 
 #include "initializer/data_provider.hpp"
 
-#include "pragma_disable.hpp"
+#include "core/def/pragma_disable.hpp"
 
 // clang-format off
 DISABLE_WARNING(shadow, shadow-field-in-constructor-modified, 42)

src/python3/cpp_simulator.hpp

@@ -4,7 +4,7 @@
 #include <vector>
 #include <cstddef>
 
-#include "mpi.h"
+#include "core/def/mpi.hpp"
 
 #include "core/utilities/mpi_utils.hpp"
 #include "core/data/particles/particle.hpp"

tests/amr/multiphysics_integrator/test_multiphysics_integrator.cpp

@@ -1,5 +1,5 @@
 
-#include <mpi.h>
+#include "core/def/mpi.hpp"
 
 #include "tests/simulator/per_test.hpp"
 

tests/diagnostic/test-diagnostics_1d.cpp

@@ -1,5 +1,5 @@
 
-#include <mpi.h>
+#include "core/def/mpi.hpp"
 
 #include "test_diagnostics.ipp"
 

tests/diagnostic/test-diagnostics_2d.cpp

@@ -1,5 +1,5 @@
 
-#include <mpi.h>
+#include "core/def/mpi.hpp"
 
 #include "test_diagnostics.ipp"
 

tools/config/CMakeLists.txt

@@ -0,0 +1,27 @@
+
+project(phare_configurator)
+
+cmake_minimum_required (VERSION 3.22)
+
+set(PROJECT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+# set(ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../..)
+
+
+find_package(MPI REQUIRED)
+foreach(LIB ${MPI_LIBRARY})
+    get_filename_component(MPI_LIBRARY_PATH ${LIB} DIRECTORY)
+endforeach()
+
+include_directories(${MPI_C_HEADER_DIR})
+
+add_executable(${PROJECT_NAME} main.cpp)
+target_link_libraries(${PROJECT_NAME} mpi mpi_cxx)
+target_link_directories(${PROJECT_NAME} PUBLIC ${MPI_LIBRARY_PATH})
+
+## probably should do something to check if mpi_cxx is even available, cause deprecated.
+# get_cmake_property(_variableNames VARIABLES)
+# list (SORT _variableNames)
+# foreach (_variableName ${_variableNames})
+#     message(STATUS "${_variableName}=${${_variableName}}")
+# endforeach()
+

tools/config/cmake.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -e
+CWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" && cd "$CWD"
+ROOT_DIR=$(cd ../.. && pwd)
+[ -f "${ROOT_DIR}/res/cmake/def.cmake" ] || (echo "Corruption detected" && exit 1) # confirm correct directory
+
+[ -d build ] || (
+    mkdir -p build && cd build
+    cmake -DCMAKE_BUILD_TYPE=Release .. -G Ninja 2>&1 > /dev/null
+    ninja && ./phare_configurator
+)
+python3 config.py

tools/config/config.py

@@ -0,0 +1,45 @@
+import os
+from pathlib import Path
+
+FILE_DIR = Path(os.path.dirname(os.path.realpath(__file__)))
+ROOT_DIR = Path(os.path.realpath(FILE_DIR / ".." / ".."))
+if not os.path.exists(ROOT_DIR / "src" / "core" / "def"):
+    raise RuntimeError("Corruption detected")
+FILES = [f for f in Path(FILE_DIR).glob("build/PHARE_*")]
+
+
+def local_file_format(filename):
+    return filename[6:-4]
+
+
+def create_file(f):
+    with open(f, "a") as file:
+        file.truncate(0)
+
+
+def config_mpi_version(txtfile, h_file):
+    with open(txtfile) as f:
+        version = f.readline()
+    out_buff = "\n"
+    if "OpenMPI" in version:
+        out_buff += "// avoids default including mpicxx \n"
+        out_buff += "#define OMPI_SKIP_MPICXX 1 \n\n"
+    with open(h_file, "w") as f:
+        f.write(out_buff)
+
+
+def config_mpi():
+    h_file = ROOT_DIR / "src" / "core" / "def" / "_gen_mpi.hpp"
+    create_file(h_file)
+    operatators = dict(MPI_Get_library_version=config_mpi_version)
+    for f in FILES:
+        fn = operatators.get(local_file_format(f.name), lambda x, y: 0)
+        fn(f, h_file)
+
+
+def main():
+    config_mpi()
+
+
+if __name__ == "__main__":
+    main()

tools/config/main.cpp

@@ -0,0 +1,20 @@
+
+#include "mpi.h"
+
+#include <fstream>
+#include <exception>
+
+void config_mpi()
+{
+    char version[MPI_MAX_LIBRARY_VERSION_STRING];
+    int resultlen = 0;
+    auto ret      = MPI_Get_library_version(version, &resultlen);
+    if (ret)
+        throw std::runtime_error("error calling MPI_Get_library_version");
+    std::ofstream{"PHARE_MPI_Get_library_version.txt", std::ios::out} << version << std::endl;
+}
+
+int main()
+{
+    config_mpi();
+}