CI: Debug arm-none-eabi-gcc

Author: adamgreig

.github/workflows/ci.yaml

@@ -62,10 +62,9 @@ jobs:
       - name: Install arm-none-eabi-gcc and qemu
         if: steps.cache-bin.outputs.cache-hit != 'true'
         run: |
-          mkdir -p gcc ~/cache-bin
-          curl -L https://developer.arm.com/-/media/Files/downloads/gnu-rm/7-2018q2/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2?revision=bc2c96c0-14b5-4bb4-9f18-bceb4050fee7?product=GNU%20Arm%20Embedded%20Toolchain,64-bit,,Linux,7-2018-q2-update \
-            | tar --strip-components=1 -C gcc -xj
-          cp gcc/bin/* ~/cache-bin
+          mkdir -p ~/cache-bin/gcc
+          curl -L https://developer.arm.com/-/media/Files/downloads/gnu-rm/10.3-2021.07/gcc-arm-none-eabi-10.3-2021.07-x86_64-linux.tar.bz2 \
+            | tar --strip-components=1 -C ~/cache-bin/gcc -xj
 
           curl -L https://github.com/japaric/qemu-bin/raw/master/14.04/qemu-system-arm-2.12.0 \
             > ~/cache-bin/qemu-system-arm
@@ -79,6 +78,7 @@ jobs:
       - name: Put new bin directory into path
         run: |
           echo "~/cache-bin" >> $GITHUB_PATH
+          echo "~/cache-bin/gcc/bin" >> $GITHUB_PATH
 
       - name: Test arm-none-eabi-gcc
         run: |

ci/script.sh

@@ -124,12 +124,12 @@ main() {
 
     # check that the disassembly matches
     pushd app
-    export CC_thumbv7m_none_eabi=$HOME/cache-bin/arm-none-eabi-gcc
-    export CC=$HOME/cache-bin/arm-none-eabi-gcc
-    echo $CC_thumbv7m_none_eabi
-    echo $CC
+    env
+    which arm-none-eabi-gcc
+    which arm-none-eabi-as
+    which as
     arm-none-eabi-gcc --version
-    arm-none-eabi-gcc -O3 -ffunction-sections -fdata-sections -mthumb -march=armv7-m -Wall -Wextra -c ../rt/asm.s
+    arm-none-eabi-gcc -v -O3 -ffunction-sections -fdata-sections -mthumb -march=armv7-m -Wall -Wextra -c ../rt/asm.s
     cargo build --bin app --release
     diff -b release.objdump \
          <(cargo objdump --bin app --release -- -d --no-show-raw-insn --print-imm-hex --no-leading-addr)