try to fix win build (and OBC)

Author: Nat!

.github/workflows/cmake-errors.yml

@@ -20,7 +20,7 @@ jobs:
             compiler: gcc
             cflags: -Werror -Wall -Wextra
             build-dir: ../build
-            src-dir: ../mulle-core
+            src-dir: ../mulle-objc-runtime
 
           - name: Ubuntu GCC -O3
             os: ubuntu-latest
@@ -75,19 +75,33 @@ jobs:
         id: set-install-dir
         shell: bash
         run: |
-          if [ "$RUNNER_OS" == "Windows" ]; then
-            echo "INSTALL_DIR=$GITHUB_WORKSPACE/mulle-install" >> $GITHUB_OUTPUT
+          if [ "$RUNNER_OS" == "Windows" ]
+          then
+            SRC_DIR="$GITHUB_WORKSPACE\\tmp"
+            INSTALL_DIR="$GITHUB_WORKSPACE\\usr"
+            MULLE_CORE_SRC_DIR="$SRC_DIR\\mulle-core"
+            MULLE_ATINIT_SRC_DIR="$SRC_DIR\\mulle-atinit"
+            MULLE_ATEXIT_SRC_DIR="$SRC_DIR\\mulle-atexit"
           else
-            echo "INSTALL_DIR=$GITHUB_WORKSPACE/mulle-install" >> $GITHUB_OUTPUT
+            SRC_DIR="$GITHUB_WORKSPACE/tmp"
+            INSTALL_DIR="$GITHUB_WORKSPACE/usr"
+            MULLE_CORE_SRC_DIR="$SRC_DIR/mulle-core"
+            MULLE_ATINIT_SRC_DIR="$SRC_DIR/mulle-atinit"
+            MULLE_ATEXIT_SRC_DIR="$SRC_DIR/mulle-atexit"
           fi
-          mkdir -p $GITHUB_WORKSPACE/mulle-install
+          echo "INSTALL_DIR=$INSTALL_DIR"                   >> $GITHUB_OUTPUT
+          echo "MULLE_CORE_SRC_DIR=$MULLE_CORE_SRC_DIR"     >> $GITHUB_OUTPUT
+          echo "MULLE_ATINIT_SRC_DIR=$MULLE_ATINIT_SRC_DIR" >> $GITHUB_OUTPUT
+          echo "MULLE_ATEXIT_SRC_DIR=$MULLE_ATEXIT_SRC_DIR" >> $GITHUB_OUTPUT
+          mkdir -p "$SRC_DIR"
+          mkdir -p "$INSTALL_DIR"
           
       - name: Clone mulle-core repository
         run: |
-          git clone https://github.com/mulle-core/mulle-core.git /tmp/mulle-core
+          git clone https://github.com/mulle-core/mulle-core.git "${MULLE_CORE_SRC_DIR}"
           
       - name: Configure, build and install mulle-core with CMake
-        working-directory: /tmp/mulle-core
+        working-directory: "${steps.set-install-dir.outputs.MULLE_CORE_SRC_DIR}"
         run: |
           export MULLE_SDK_PATH=${{ steps.set-install-dir.outputs.INSTALL_DIR }}
           cmake -B build \
@@ -100,10 +114,10 @@ jobs:
 
       - name: Clone mulle-atinit repository
         run: |
-          git clone https://github.com/mulle-core/mulle-atinit.git /tmp/mulle-atinit
+          git clone https://github.com/mulle-core/mulle-atinit.git "${steps.set-install-dir.outputs.MULLE_ATINIT_SRC_DIR}"
           
       - name: Configure, build and install mulle-atinit with CMake
-        working-directory: /tmp/mulle-atinit
+        working-directory: "${steps.set-install-dir.outputs.MULLE_ATINIT_SRC_DIR}"
         run: |
           export MULLE_SDK_PATH=${{ steps.set-install-dir.outputs.INSTALL_DIR }}
           cmake -B build \
@@ -116,10 +130,10 @@ jobs:
 
       - name: Clone mulle-atexit repository
         run: |
-          git clone https://github.com/mulle-core/mulle-atexit.git /tmp/mulle-atexit
+          git clone https://github.com/mulle-core/mulle-atexit.git "${steps.set-install-dir.outputs.MULLE_ATEXIT_SRC_DIR}"
           
       - name: Configure, build and install mulle-atexit with CMake
-        working-directory: /tmp/mulle-atexit
+        working-directory: "${steps.set-install-dir.outputs.MULLE_ATEXIT_SRC_DIR}"
         run: |
           export MULLE_SDK_PATH=${{ steps.set-install-dir.outputs.INSTALL_DIR }}
           cmake -B build \