fix build with cmake 4

.github/docker/ubuntu18.04/c4core-install

@@ -24,6 +24,7 @@ case $what in
         $script gcc-14
         ;;
     clang-all)
+        $script clang-18
         $script clang-17
         $script clang-16
         $script clang-15
@@ -302,6 +303,18 @@ case $what in
         apt-get install -y \
                 clang-17 clang-tidy-17
         ;;
+    clang++-18|clang-18)
+        apt-get update
+        apt-get install -y \
+                wget \
+                software-properties-common
+        wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key 2>/dev/null | apt-key add -
+        apt-add-repository --yes --no-update ppa:ubuntu-toolchain-r/test
+        apt-add-repository --yes --no-update "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-18 main"
+        apt-get update
+        apt-get install -y \
+                clang-18 clang-tidy-18
+        ;;
     arm-none-eabi)
         # taken from: https://askubuntu.com/questions/1243252/how-to-install-arm-none-eabi-gdb-on-ubuntu-20-04-lts-focal-fossa/1371525#1371525
         apt-get update

.github/docker/ubuntu22.04/c4core-install

@@ -24,6 +24,7 @@ case $what in
         $script gcc-14
         ;;
     clang-all)
+        $script clang-19
         $script clang-18
         $script clang-17
         $script clang-16
@@ -274,6 +275,18 @@ case $what in
         apt-get install -y \
                 clang-18 clang-tidy-18
         ;;
+    clang++-19|clang-19)
+        apt-get update
+        apt-get install -y \
+                wget \
+                software-properties-common
+        wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key 2>/dev/null | apt-key add -
+        apt-add-repository --yes --no-update ppa:ubuntu-toolchain-r/test
+        apt-add-repository --yes --no-update "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-19 main"
+        apt-get update
+        apt-get install -y \
+                clang-19 clang-tidy-19
+        ;;
     arm-none-eabi)
         # taken from: https://askubuntu.com/questions/1243252/how-to-install-arm-none-eabi-gdb-on-ubuntu-20-04-lts-focal-fossa/1371525#1371525
         apt-get update

.github/docker/ubuntu24.04/c4core-install

@@ -24,6 +24,7 @@ case $what in
         $script gcc-4.8
         ;;
     clang-all)
+        $script clang-19
         $script clang-18
         $script clang-17
         $script clang-16
@@ -333,6 +334,11 @@ case $what in
         apt-get install -y \
                 clang-18 clang-tidy-18
         ;;
+    clang++-19|clang-19)
+        apt-get update
+        apt-get install -y \
+                clang-19 clang-tidy-19
+        ;;
     arm-none-eabi)
         apt-get update
         apt-get install -y \

.github/reqs.sh

@@ -237,6 +237,7 @@ function _c4_gather_compilers()
 {
     cxx=$1
     case $cxx in
+        g++-14     ) _c4_addgcc 14 ;;
         g++-13     ) _c4_addgcc 13 ;;
         g++-12     ) _c4_addgcc 12 ;;
         g++-11     ) _c4_addgcc 11 ;;
@@ -248,6 +249,10 @@ function _c4_gather_compilers()
         g++-5      ) _c4_addgcc 5  ;;
         g++-4.9    ) _c4_addgcc 4.9 ;;  # https://askubuntu.com/questions/1036108/install-gcc-4-9-at-ubuntu-18-04
         g++-4.8    ) _c4_addgcc 4.8 ;;
+        clang++-19 ) _c4_addclang 19  ;;
+        clang++-18 ) _c4_addclang 18  ;;
+        clang++-17 ) _c4_addclang 17  ;;
+        clang++-16 ) _c4_addclang 16  ;;
         clang++-15 ) _c4_addclang 15  ;;
         clang++-14 ) _c4_addclang 14  ;;
         clang++-13 ) _c4_addclang 13  ;;
@@ -342,10 +347,11 @@ function _c4_addgcc()
 # add a clang compiler
 function _c4_addclang()
 {
+    wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
     clversion=$1
     case $clversion in
         # in 18.04, clang9 and later require PPAs
-        9 | 10 | 11 | 12 | 13 | 14 | 15)
+        9 | 10 | 11 | 12 | 13)
             _add_apt clang-$clversion "deb http://apt.llvm.org/$UBUNTU_RELEASE_NAME/ llvm-toolchain-$UBUNTU_RELEASE_NAME-$clversion main"
             # libstdc++ is required
             _c4_addgcc 11

.github/setenv.sh

@@ -107,12 +107,12 @@ function _c4skipbitlink()
 
 function c4_build_test()
 {
-    c4_build_target $* test-build
+    c4_build_target $* c4core-test-build
 }
 
 function c4_run_test()
 {
-    c4_run_target $* test
+    c4_run_target $* c4core-test-run
 }
 
 function c4_build_target()  # runs in parallel

.github/workflows-in/clang.ys

@@ -137,14 +137,14 @@ jobs:
 #      matrix:
 #        include:
 #          # these jobs take much longer, so run only one bitlink pair per job to profit from parallelism
-#          - {std: 11, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-20.04}
-#          - {std: 11, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-20.04}
-#          - {std: 14, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-20.04}
-#          - {std: 14, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-20.04}
-#          - {std: 17, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-20.04}
-#          - {std: 17, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-20.04}
-#          - {std: 20, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-20.04}
-#          - {std: 20, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-20.04}
+#          - {std: 11, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-22.04}
+#          - {std: 11, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-22.04}
+#          - {std: 14, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-22.04}
+#          - {std: 14, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-22.04}
+#          - {std: 17, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-22.04}
+#          - {std: 17, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-22.04}
+#          - {std: 20, cxx: clang++-10, bt: Debug  , bitlinks: shared64, os: ubuntu-22.04}
+#          - {std: 20, cxx: clang++-10, bt: Release, bitlinks: shared64, os: ubuntu-22.04}
 #    env: {STD: "${{matrix.std}}", CXX_: "${{matrix.cxx}}", BT: "${{matrix.bt}}", BITLINKS: "${{matrix.bitlinks}}", VG: "${{matrix.vg}}", SAN: "${{matrix.san}}", LINT: "${{matrix.lint}}", OS: "${{matrix.os}}"}
 #    steps:
 #      - {name: checkout, uses: actions/checkout@v4, with: {submodules: recursive}}

.github/workflows-in/gcc.ys

@@ -145,12 +145,12 @@ jobs:
       matrix:
         include:
           # these jobs take much longer, so run only one bitlink pair per job to profit from parallelism
-          - {std: 11, bt: Debug  , toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc, os: ubuntu-20.04}
-          - {std: 11, bt: Release, toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc, os: ubuntu-20.04}
-          - {std: 14, bt: Debug  , toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc, os: ubuntu-20.04}
-          - {std: 14, bt: Release, toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc, os: ubuntu-20.04}
-          - {std: 17, bt: Debug  , toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc, os: ubuntu-20.04}
-          - {std: 17, bt: Release, toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc, os: ubuntu-20.04}
+          - {std: 11, bt: Debug  , toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc}
+          - {std: 11, bt: Release, toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc}
+          - {std: 14, bt: Debug  , toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc}
+          - {std: 14, bt: Release, toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc}
+          - {std: 17, bt: Debug  , toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc}
+          - {std: 17, bt: Release, toolchain: cmake/Toolchain-Arm-ubuntu.cmake, cxx: arm-linux-gnueabihf-gcc}
     env:: -{'TOOLCHAIN' '${{matrix.toolchain}}'} +
           load('share/env.yaml')
     steps: