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CI: Arm's 13.2.Rel1 toolchain tarball (cached) on the QEMU legs instead of apt gcc-arm-none-eabi #82

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tap merged 2 commits into from
Oct 2, 2026
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CI: Arm's 13.2.Rel1 toolchain tarball (cached) on the QEMU legs instead of apt gcc-arm-none-eabi #82

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CI: Arm's own 13.2.Rel1 toolchain tarball on the QEMU legs, cached, i…
tap Oct 1, 2026
329d388
CI: the instruction-count ratchet takes the Arm toolchain from the sa…
tap Oct 1, 2026
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132 changes: 109 additions & 23 deletions .github/workflows/ci.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -190,16 +190,44 @@ jobs:
with:
submodules: recursive

# A stalled Ubuntu mirror once ate a leg's whole 45-minute budget twice in a
# row while fetching the 463 MB libstdc++-arm-none-eabi-newlib package
# (tap/MuTap#67). Fail the fetch fast and retry it instead.
- name: Install toolchain and QEMU
# Ubuntu's gcc-arm-none-eabi pulls the 463 MB libstdc++-arm-none-eabi-newlib
# package from the runner's Azure mirror, which stalled past a 15-minute
# step limit three times on 2026-10-01 (and ate two 45-minute legs on
# tap/MuTap#67 before that). The toolchain is Arm's own 13.2.Rel1 release
# instead — the same upstream version Ubuntu noble packages (15:13.2.rel1-2)
# — cached between runs and verified against Arm's published sha256.
# Only qemu-system-arm still comes from apt.
- name: Restore the Arm GNU toolchain
id: arm-toolchain
uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
with:
path: ${{ runner.temp }}/arm-gnu-toolchain
key: arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi

- name: Download the Arm GNU toolchain
if: steps.arm-toolchain.outputs.cache-hit != 'true'
timeout-minutes: 15
run: >
sudo apt-get update -q &&
sudo apt-get install -y -q
-o Acquire::Retries=5 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60
gcc-arm-none-eabi qemu-system-arm
env:
ARM_GNU: arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi
ARM_URL: https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel
run: |
set -euo pipefail
cd "$RUNNER_TEMP"
curl -sSfL --retry 5 --retry-all-errors --connect-timeout 30 -o "$ARM_GNU.tar.xz" "$ARM_URL/$ARM_GNU.tar.xz"
curl -sSfL --retry 5 --retry-all-errors --connect-timeout 30 -o "$ARM_GNU.tar.xz.sha256asc" "$ARM_URL/$ARM_GNU.tar.xz.sha256asc"
sha256sum -c "$ARM_GNU.tar.xz.sha256asc"
mkdir -p arm-gnu-toolchain
tar -xJf "$ARM_GNU.tar.xz" -C arm-gnu-toolchain --strip-components=1
rm "$ARM_GNU.tar.xz" "$ARM_GNU.tar.xz.sha256asc"

- name: Put the toolchain on PATH and install QEMU
timeout-minutes: 15
run: |
set -euo pipefail
echo "$RUNNER_TEMP/arm-gnu-toolchain/bin" >> "$GITHUB_PATH"
"$RUNNER_TEMP/arm-gnu-toolchain/bin/arm-none-eabi-g++" --version | head -1
sudo apt-get update -q
sudo apt-get install -y -q -o Acquire::Retries=5 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 qemu-system-arm

- name: Configure
run: >
Expand Down Expand Up @@ -307,16 +335,44 @@ jobs:
with:
submodules: recursive

# A stalled Ubuntu mirror once ate a leg's whole 45-minute budget twice in a
# row while fetching the 463 MB libstdc++-arm-none-eabi-newlib package
# (tap/MuTap#67). Fail the fetch fast and retry it instead.
- name: Install toolchain and QEMU
# Ubuntu's gcc-arm-none-eabi pulls the 463 MB libstdc++-arm-none-eabi-newlib
# package from the runner's Azure mirror, which stalled past a 15-minute
# step limit three times on 2026-10-01 (and ate two 45-minute legs on
# tap/MuTap#67 before that). The toolchain is Arm's own 13.2.Rel1 release
# instead — the same upstream version Ubuntu noble packages (15:13.2.rel1-2)
# — cached between runs and verified against Arm's published sha256.
# Only qemu-system-arm still comes from apt.
- name: Restore the Arm GNU toolchain
id: arm-toolchain
uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
with:
path: ${{ runner.temp }}/arm-gnu-toolchain
key: arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi

- name: Download the Arm GNU toolchain
if: steps.arm-toolchain.outputs.cache-hit != 'true'
timeout-minutes: 15
run: >
sudo apt-get update -q &&
sudo apt-get install -y -q
-o Acquire::Retries=5 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60
gcc-arm-none-eabi qemu-system-arm
env:
ARM_GNU: arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi
ARM_URL: https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel
run: |
set -euo pipefail
cd "$RUNNER_TEMP"
curl -sSfL --retry 5 --retry-all-errors --connect-timeout 30 -o "$ARM_GNU.tar.xz" "$ARM_URL/$ARM_GNU.tar.xz"
curl -sSfL --retry 5 --retry-all-errors --connect-timeout 30 -o "$ARM_GNU.tar.xz.sha256asc" "$ARM_URL/$ARM_GNU.tar.xz.sha256asc"
sha256sum -c "$ARM_GNU.tar.xz.sha256asc"
mkdir -p arm-gnu-toolchain
tar -xJf "$ARM_GNU.tar.xz" -C arm-gnu-toolchain --strip-components=1
rm "$ARM_GNU.tar.xz" "$ARM_GNU.tar.xz.sha256asc"

- name: Put the toolchain on PATH and install QEMU
timeout-minutes: 15
run: |
set -euo pipefail
echo "$RUNNER_TEMP/arm-gnu-toolchain/bin" >> "$GITHUB_PATH"
"$RUNNER_TEMP/arm-gnu-toolchain/bin/arm-none-eabi-g++" --version | head -1
sudo apt-get update -q
sudo apt-get install -y -q -o Acquire::Retries=5 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 qemu-system-arm

- name: Configure
run: >
Expand Down Expand Up @@ -529,11 +585,41 @@ jobs:
with:
submodules: recursive

- name: Install toolchains and QEMU
run: >
sudo apt-get update -q &&
sudo apt-get install -y -q gcc-arm-none-eabi qemu-system-arm
libglib2.0-dev pkg-config ninja-build meson flex bison
# The Arm toolchain comes from Arm's tarball, cached, for the reason the
# Cortex legs give above (the 463 MB apt package stalls on the mirror);
# the baselines were seeded from gcc-arm-none-eabi 13.2.rel1, the same
# upstream release, and the ratchet's +/-3 % tolerance is the check.
- name: Restore the Arm GNU toolchain
id: arm-toolchain
uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
with:
path: ${{ runner.temp }}/arm-gnu-toolchain
key: arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi

- name: Download the Arm GNU toolchain
if: steps.arm-toolchain.outputs.cache-hit != 'true'
timeout-minutes: 15
env:
ARM_GNU: arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi
ARM_URL: https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel
run: |
set -euo pipefail
cd "$RUNNER_TEMP"
curl -sSfL --retry 5 --retry-all-errors --connect-timeout 30 -o "$ARM_GNU.tar.xz" "$ARM_URL/$ARM_GNU.tar.xz"
curl -sSfL --retry 5 --retry-all-errors --connect-timeout 30 -o "$ARM_GNU.tar.xz.sha256asc" "$ARM_URL/$ARM_GNU.tar.xz.sha256asc"
sha256sum -c "$ARM_GNU.tar.xz.sha256asc"
mkdir -p arm-gnu-toolchain
tar -xJf "$ARM_GNU.tar.xz" -C arm-gnu-toolchain --strip-components=1
rm "$ARM_GNU.tar.xz" "$ARM_GNU.tar.xz.sha256asc"

- name: Put the toolchain on PATH and install QEMU and the plugin build deps
timeout-minutes: 20
run: |
set -euo pipefail
echo "$RUNNER_TEMP/arm-gnu-toolchain/bin" >> "$GITHUB_PATH"
"$RUNNER_TEMP/arm-gnu-toolchain/bin/arm-none-eabi-g++" --version | head -1
sudo apt-get update -q
sudo apt-get install -y -q -o Acquire::Retries=5 -o Acquire::http::Timeout=60 -o Acquire::https::Timeout=60 qemu-system-arm libglib2.0-dev pkg-config ninja-build meson flex bison

- name: Build counting plugin
run: |
Expand Down
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