Add workflow to test Check examples

.github/utils/CheckExamples/CMakeLists.txt

@@ -0,0 +1,45 @@
+# This just checks that files in the Check folders are compilable to avoid
+# committing incorrect examples. It's done here, separately and in bulk, so that
+# no overhead is added by default when submitting a new check. You'll hopefully
+# only have to know this exists if your example fails to compile
+
+cmake_minimum_required(VERSION 3.25)
+project("Test that the check examples compile")
+
+enable_language(Fortran OPTIONAL)
+# Build them as libraries, not executables
+set (CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+
+set (BASE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../Checks)
+message(STATUS "Looking for files in '${BASE_DIR}'")
+
+file(GLOB check_files
+  ${BASE_DIR}/*/*.c
+  ${BASE_DIR}/*/*.cpp
+  ${BASE_DIR}/*/*.f
+  ${BASE_DIR}/*/*.f90
+)
+
+# PWR068: Has a module file that has to be compiled in order, and a compilation error on purpose
+# PWD003: GFortran catches the data transfer error
+set (excluded_checks_regex "PWR068|PWD003")
+
+list(FILTER check_files EXCLUDE REGEX ${excluded_checks_regex})
+
+foreach(check_file ${check_files})
+  message(STATUS "Trying to compile ${check_file}")
+  set (extra_flags "-fopenmp -fopenacc")
+  try_compile(
+    TRY_RESULT ${CMAKE_BINARY_DIR}
+    SOURCES ${check_file}
+    CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${extra_flags}
+    OUTPUT_VARIABLE TRY_RESULT_OUTPUT
+  )
+
+  if (TRY_RESULT)
+    message(STATUS "Trying to compile ${check_file} -- Good")
+  else()
+    message(STATUS "Trying to compile ${check_file} -- Bad")
+    message("${TRY_RESULT_OUTPUT}")
+  endif()
+endforeach()

.github/workflows/test-check-examples.yml

@@ -0,0 +1,16 @@
+on:
+  push:
+    paths:
+      - '.github/workflows/**'
+      - 'Checks/**'
+
+jobs:
+  # Let us run this job on Ubuntu only, so we can check at the moment that
+  # examples compile at least on GCC && GFortran
+  multiple-compilers:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+      - name: Check that all check examples compile
+        run: cmake -B build -DCMAKE_C_COMPILER=gcc -DCMAKE_Fortran_COMPILER=gfortran -S .github/utils/CheckExamples/