ci: replace hardcoded /home/travis toolchain path with runner.tool_cache

Author: a5021

.github/workflows/build.yml

@@ -16,20 +16,20 @@ jobs:
         id: cache-toolchain
         uses: actions/cache@v4
         with:
-          path: /home/travis/arm-gcc-toolchain
+          path: ${{ runner.tool_cache }}/arm-gcc-toolchain
           key: arm-gcc-9-2020-q2-update
 
       - name: Install ARM GCC toolchain
         if: steps.cache-toolchain.outputs.cache-hit != 'true'
         run: |
           sudo apt-get update
           sudo apt-get install -y xz-utils wget
-          sudo mkdir -p /home/travis/arm-gcc-toolchain
+          sudo mkdir -p "${{ runner.tool_cache }}/arm-gcc-toolchain"
           wget -qO- "https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2020q2/gcc-arm-none-eabi-9-2020-q2-update-x86_64-linux.tar.bz2" \
-            | sudo tar -xjf - -C /home/travis/arm-gcc-toolchain --strip=1
+            | sudo tar -xjf - -C "${{ runner.tool_cache }}/arm-gcc-toolchain" --strip=1
 
       - name: Symlink toolchain binaries
-        run: sudo ln -sf /home/travis/arm-gcc-toolchain/bin/arm-none-eabi-* /usr/local/bin/
+        run: sudo ln -sf "${{ runner.tool_cache }}/arm-gcc-toolchain/bin/arm-none-eabi-"* /usr/local/bin/
 
       - name: Build
         run: make

IDE/GCC/mk/Makefile.posix

@@ -1,3 +1,3 @@
-GNU_INSTALL_ROOT ?= /home/travis/arm-gcc-toolchain/bin/
+GNU_INSTALL_ROOT ?= $(HOME)/arm-gcc-toolchain/bin/
 GNU_VERSION ?= 7.2.1
 GNU_PREFIX ?= arm-none-eabi