Set Fortran standards and add tests (#145)

* Add tests for different Fortran standards

* Set Fortran 2008 to default standard

* Update README with Fortran standard

* Add dependencies to documentation

---------

Co-authored-by: ElliottKasoar <ElliottKasoar@users.noreply.github.com>

.github/workflows/test_suite.yml

@@ -18,6 +18,10 @@ jobs:
   test-suite:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        std: ["f2008", "f2018"]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -45,7 +49,7 @@ jobs:
           export BUILD_DIR=$(pwd)/src/build
           mkdir ${BUILD_DIR}
           cd ${BUILD_DIR}
-          cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=${BUILD_DIR} -DCMAKE_BUILD_TESTS=TRUE
+          cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=${BUILD_DIR} -DCMAKE_BUILD_TESTS=TRUE -DCMAKE_Fortran_FLAGS="-std=${{ matrix.std }}"
           cmake --build .
           cmake --install .
 

README.md

@@ -3,6 +3,7 @@
 **_A library for coupling (Py)Torch machine learning models to Fortran_**
 
 ![GitHub](https://img.shields.io/github/license/Cambridge-ICCS/FTorch)
+![Fortran](https://img.shields.io/badge/Fortran-2008-purple)
 
 This repository contains code, utilities, and examples for directly calling PyTorch ML
 models from Fortran.
@@ -83,7 +84,7 @@ To install the library requires the following to be installed on the system:
 
 * CMake >= 3.1
 * [libtorch](https://pytorch.org/cppdocs/installing.html)<sup>*</sup> or [PyTorch](https://pytorch.org/)
-* Fortran, C++ (must fully support C++17), and C compilers
+* Fortran (2008 standard compliant), C++ (must fully support C++17), and C compilers
 
 <sup>*</sup> _The minimal example provided downloads the CPU-only Linux Nightly binary. [Alternative versions](https://pytorch.org/get-started/locally/) may be required._
 

pages/cmake.md

@@ -6,6 +6,15 @@ Installation of FTorch is done by CMake.
 
 This is controlled by the `CMakeLists.txt` file in `src/`.
 
+## Dependencies
+
+To install the library requires the following to be installed on the system:
+
+- CMake >= 3.1
+- libtorch or PyTorch
+- Fortran (2008 standard compliant), C++ (must fully support C++17), and C compilers
+
+
 ## Basic instructions
 
 To build the library, first clone it from GitHub to your local machine and then run:

src/CMakeLists.txt

@@ -12,6 +12,10 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
+if(NOT CMAKE_Fortran_FLAGS)
+    set(CMAKE_Fortran_FLAGS "-std=f2008")
+endif()
+
 include(CheckLanguage)
 if(ENABLE_CUDA)
   check_language(CUDA)