ci:flang LLVM 20

Author: scivision

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ on:
 
 jobs:
 
-  linux-gcc14:
+  linux-gcc:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
 
@@ -38,7 +38,7 @@ jobs:
     - uses: ./.github/workflows/composite-unix
 
 
-  linux-gcc9:
+  linux-gcc-old:
     runs-on: ubuntu-22.04
     timeout-minutes: 15
 
@@ -59,7 +59,7 @@ jobs:
 
   valgrind-memory:
     runs-on: ubuntu-latest
-    needs: linux-gcc14
+    needs: linux-gcc
     timeout-minutes: 10
 
     steps:
@@ -79,18 +79,25 @@ jobs:
 
     strategy:
       matrix:
-        clang-version: [18]
+        clang-version: [20]
 
     env:
       CC: clang-${{ matrix.clang-version }}
       CXX: clang++-${{ matrix.clang-version }}
-      FC: flang-new
+      FC: flang-${{ matrix.clang-version }}
 
     steps:
     - uses: actions/checkout@v4
 
+    - name: Apt LLVM
+      run: |
+          wget https://apt.llvm.org/llvm.sh
+          chmod +x llvm.sh
+          sudo ./llvm.sh 20
+          sudo apt-get update
+
     - name: install Flang
-      run: sudo apt install --no-install-recommends flang
+      run: sudo apt install --no-install-recommends clang-${{ matrix.clang-version }} flang-${{ matrix.clang-version }}
 
     - uses: ./.github/workflows/composite-unix
 

test/pointer/README.md

@@ -7,9 +7,4 @@ and modern "nullptr" in
 are represented in Fortran
 [iso_c_binding](https://fortranwiki.org/fortran/show/iso_c_binding).
 
-Unlike in C / C++, do not check equality with C_NULL_PTR in Fortran.
-Instead, by definition the
-[c_associated()](https://fortranwiki.org/fortran/show/c_associated)
-logical function returns ".false." if the C_PTR is C_NULL_PTR, and ".true." otherwise.
-See [strptime.f90](./strptime.f90)
-for an example of checking in Fortran for a C null pointer returned from a function.
+See [nullptr](../nullptr) for examples of checking for C / C++ NULL / nullptr from Fortran.