fixes #13080 -- test and build wheels for musl armv7l

Author: alex

.github/workflows/ci.yml

@@ -222,6 +222,7 @@ jobs:
         IMAGE:
           - {IMAGE: "alpine", NOXSESSION: "tests", RUNNER: "ubuntu-latest"}
           - {IMAGE: "alpine:aarch64", NOXSESSION: "tests", RUNNER: "ubuntu-24.04-arm"}
+          - {IMAGE: "alpine:armv7l", NOXSESSION: "tests", RUNNER: "ubuntu-24.04-arm"}
     timeout-minutes: 15
     env:
       RUSTUP_HOME: /root/.rustup
@@ -236,7 +237,7 @@ jobs:
           # then use a glibc nodejs, which works fine when gcompat
           # is installed in the container (which it is)
           sed -i "s:ID=alpine:ID=NotpineForGHA:" /etc/os-release
-        if: matrix.IMAGE.IMAGE == 'alpine:aarch64'
+        if: matrix.IMAGE.IMAGE == 'alpine:aarch64' || matrix.IMAGE.IMAGE == 'alpine:armv7l'
 
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         timeout-minutes: 3

.github/workflows/wheel-builder.yml

@@ -81,6 +81,7 @@ jobs:
           - { NAME: "musllinux_1_2_aarch64", CONTAINER: "cryptography-musllinux_1_2:aarch64", RUNNER: "ubuntu-24.04-arm" }
 
           - { NAME: "manylinux_2_31_armv7l", CONTAINER: "cryptography-manylinux_2_31:armv7l", RUNNER: "ubuntu-24.04-arm" }
+          - { NAME: "musllinux_1_2_armv7l", CONTAINER: "cryptography-musllinux_1_2:armv7l", RUNNER: "ubuntu-24.04-arm" }
         exclude:
           # There are no readily available musllinux PyPy distributions
           - PYTHON: { VERSION: "pp310-pypy310_pp73" }
@@ -107,6 +108,10 @@ jobs:
             MANYLINUX: { NAME: "manylinux_2_31_armv7l", CONTAINER: "cryptography-manylinux_2_31:armv7l", RUNNER: "ubuntu-24.04-arm" }
           - PYTHON: { VERSION: "pp311-pypy311_pp73" }
             MANYLINUX: { NAME: "manylinux_2_31_armv7l", CONTAINER: "cryptography-manylinux_2_31:armv7l", RUNNER: "ubuntu-24.04-arm" }
+          - PYTHON: { VERSION: "pp310-pypy310_pp73" }
+            MANYLINUX: { NAME: "musllinux_1_2_armv7l", CONTAINER: "cryptography-musllinux_1_2:armv7l", RUNNER: "ubuntu-24.04-arm" }
+          - PYTHON: { VERSION: "pp311-pypy311_pp73" }
+            MANYLINUX: { NAME: "musllinux_1_2_armv7l", CONTAINER: "cryptography-musllinux_1_2:armv7l", RUNNER: "ubuntu-24.04-arm" }
     name: "${{ matrix.PYTHON.VERSION }} for ${{ matrix.MANYLINUX.NAME }}"
     steps:
       - name: Ridiculous-er workaround for static node20

docs/installation.rst

@@ -33,7 +33,7 @@ operating systems.
 * ARMv7l Ubuntu rolling
 * x86-64 Debian Bullseye (11.x), Bookworm (12.x), Trixie (13.x), and
   Sid (unstable)
-* x86-64 and ARM64 Alpine (latest)
+* x86-64, ARM64, and ARMv7l Alpine (latest)
 * 32-bit and 64-bit Python on 64-bit Windows Server 2022
 
 We test compiling with ``clang`` as well as ``gcc`` and use the following