XXX try the brew instructions for flex and bison kegs

Author: ndim

.github/workflows/build.yml

@@ -222,11 +222,7 @@ jobs:
       - name: Print original PATH
         run: |
           echo "PATH=$PATH"
-          type flex
-          type bison
-      # - name: Configure environment to use brew kegs for flex and bison
-      #   run: |
-      #     echo "PATH=/opt/homebrew/opt/flex/bin:/opt/homebrew/opt/bison/bin:$PATH" >> $GITHUB_ENV
+          for b in bison flex pkg-config; do type "$b"; done
       - name: Install prerequisites
         run: >-
           brew install
@@ -240,15 +236,18 @@ jobs:
           libftdi
           readline
           libserialport
+      - name: Configure environment to use brew kegs for flex and bison
+        run: |
+          echo "PATH=/opt/homebrew/opt/flex/bin:/opt/homebrew/opt/bison/bin:$PATH" >> $GITHUB_ENV
       - name: Print PATH after brew install
         run: |
           echo "PATH=$PATH"
           for b in bison flex pkg-config; do type "$b"; done
       - name: Configure
         run: >-
           cmake
-          -D CMAKE_C_FLAGS=-I/opt/homebrew/include
-          -D CMAKE_EXE_LINKER_FLAGS=-L/opt/homebrew/Cellar
+          -D CMAKE_C_FLAGS="-I/opt/homebrew/include -I/opt/homebrew/opt/flex/include"
+          -D CMAKE_EXE_LINKER_FLAGS="-L/opt/homebrew/Cellar -L/opt/homebew/opt/flex/lib"
           -D DEBUG_CMAKE=1
           -D CMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
           -B build
@@ -298,14 +297,19 @@ jobs:
         run: |
           echo "PATH=$PATH"
           for b in bison flex pkg-config; do type "$b"; done
+          ls /opt/homebrew/include
+          ls /opt/homebrew/lib
       - name: Configure
         run: >-
           ./src/bootstrap
 
           mkdir _ambuild && cd _ambuild
 
-          CFLAGS="-I/opt/homebrew/include" LDFLAGS="-L/opt/homebrew/lib" ../src/configure --enable-option-checking=fatal
-          
+          CFLAGS="-I/opt/homebrew/include -I/opt/homebrew/opt/flex/include"
+          LDFLAGS="-L/opt/homebrew/lib    -L/opt/homebrew/opt/bison/lib"
+          ../src/configure
+          --enable-option-checking=fatal
+
       - name: Build
         run: make -C _ambuild -j$(nproc)
       - name: "avrdude -? (not installed)"