Mac BASH update for CI scripts (#2400)

.github/workflows/pull-request.yml

@@ -187,11 +187,16 @@ jobs:
         mod: 500
         rem: 1
       run: |
+        brew update
+        brew install bash
+        /usr/bin/env bash --version
         uname -a
         cd pico-sdk
         git submodule update --init
         cd ..
-        bash ./tests/build.sh
+        /usr/bin/env bash ./tests/build.sh
+        ./system/picotool/picotool version
+        otool -L ./system/picotool/picotool
 
 # Build a few examples with PlatformIO to test if integration works
   build-platformio:

tests/common.sh

@@ -112,8 +112,11 @@ function build_sketches()
             mv $build_dir/build.options.json.tmp $build_dir/build.options.json
             # Set the time of the cached core.a file to the future so the GIT header
             # we regen won't cause the builder to throw it out and rebuild from scratch.
+            uname -a | grep -qi darwin
+            if [ $? == 1 ]; then
                 touch -d 'now + 1 day' $cache_dir/core/*.a
             fi
+        fi
 
         # Clear out the last built sketch, map, elf, bin files, but leave the compiled
         # objects in the core and libraries available for use so we don't need to rebuild