[cibuildwheel] Enable building aarch64 on Linux

Add ubuntu-24.04-arm to the build matrix.

Author: khaledhosny

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-2019]
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-2019]
 
     steps:
     - uses: actions/checkout@v4

pyproject.toml

@@ -30,15 +30,19 @@ before-all = [
     "ln -s $(which ccache) /usr/lib64/ccache/gcc",
 ]
 before-test = "ccache --show-stats"
-
-[tool.cibuildwheel.linux.environment]
-CC = "/usr/lib64/ccache/gcc"
-CFLAGS = "-g0"
+environment = {CC = "/usr/lib64/ccache/gcc", CFLAGS = "-g0"}
 
 [[tool.cibuildwheel.overrides]]
 select = "*-musllinux*"
 before-all = "apk add ccache"
 environment = {CC = "/usr/lib/ccache/bin/gcc"}
 
+# Installing ccache fails on manylinux aarch64 images
+[[tool.cibuildwheel.overrides]]
+select = "*-manylinux_aarch64"
+before-all = ""
+before-test = ""
+environment = {CFLAGS = "-g0"}
+
 [tool.black]
 extend-exclude = "harfbuzz"