Fix declaration order in external BLAS/LAPACK interfaces

.github/workflows/ci_BLAS.yml

@@ -76,6 +76,7 @@ jobs:
       matrix:
         toolchain:
           - { compiler: intel, version: "2024.1" }
+          - { compiler: gcc, version: 14 }
         build: [cmake]
     env:
       BUILD_DIR: ${{ matrix.build == 'cmake' && 'build' || '.' }}
@@ -102,35 +103,44 @@ jobs:
           version: ${{ matrix.toolchain.version }}
 
       - name: Install Intel oneAPI MKL
+        if: ${{ matrix.toolchain.compiler == 'intel' }}
         run: |
           sudo apt-get install ${APT_PACKAGES}
           source /opt/intel/oneapi/mkl/latest/env/vars.sh
           printenv >> $GITHUB_ENV
 
-      # Build and test with external BLAS and LAPACK (MKL on Ubuntu with Intel compilers)
-      - name: Configure with CMake and MKL
+      - name: Install OpenBLAS and LAPACK
+        if: ${{ matrix.toolchain.compiler == 'gcc' }}
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libopenblas-dev liblapack-dev
+
+      # Build and test with external BLAS and LAPACK
+      - name: Configure with CMake
         run: >-
           cmake -Wdev -G Ninja
           -DCMAKE_BUILD_TYPE=Release
           -DCMAKE_MAXIMUM_RANK:String=4
           -DCMAKE_INSTALL_PREFIX=$PWD/_dist
           -DFIND_BLAS:STRING=TRUE
+          -DCMAKE_REQUIRE_FIND_PACKAGE_BLAS=ON
+          -DCMAKE_REQUIRE_FIND_PACKAGE_LAPACK=ON
           -S . -B ${{ env.BUILD_DIR }}
 
-      - name: Build and compile with MKL
+      - name: Build and compile
         run: cmake --build ${{ env.BUILD_DIR }} --parallel
 
-      - name: catch build fail with MKL
+      - name: catch build fail
         if: failure()
         run: cmake --build ${{ env.BUILD_DIR }} --verbose --parallel 1
 
-      - name: test with MKL
+      - name: test
         run: >-
           ctest
           --test-dir ${{ env.BUILD_DIR }}
           --parallel
           --output-on-failure
           --no-tests=error
 
-      - name: Install project with MKL
+      - name: Install project
         run: cmake --install ${{ env.BUILD_DIR }}

CHANGELOG.md

@@ -1,6 +1,9 @@
 ## Unreleased
 
 Changes to the existing modules
+  - Fixed declaration order in external BLAS/LAPACK interfaces for compilation
+    with gfortran under `-std=f2018`
+    [#1210](https://github.com/fortran-lang/stdlib/issues/1210)
   - Change in module `stdlib_system`
     - Added `set_environment_variable` and `delete_environment_variable`
       [#1187](https://github.com/fortran-lang/stdlib/issues/1187)