build: fix build regression related to auditwheel>=6.1.0

The latest auditwheel has added riscv64 manylinux ABI support, but our
build environment (and support baseline) is more recent than that,
causing our riscv64 builds to fail. For now, just probe for auditwheel
>= 6.1.0 and override the platform tag if necessary.

The pygit2 build always downloads the most recent auditwheel, so
unconditionally apply the platform tag override for it.

Link: pypa/auditwheel#504

scripts/build-pygit2.py

@@ -173,6 +173,11 @@ def get_pygit2_wheel_build_env(pygit2_dir: str) -> dict[str, str]:
         # this is unnecessary
         del r["LIBGIT2"]
 
+    # auditwheel 6.1.0+ has manylinux policies for riscv64, but the default
+    # is too low for our environment
+    # bump it up
+    r["AUDITWHEEL_PLAT"] = "manylinux_2_35_riscv64"
+
     return r
 
 

scripts/build-xingque.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 
 import os
+import platform
 import shutil
 import subprocess
 import sys
@@ -114,13 +115,29 @@ def build_xingque(xingque_ver: str, workdir: str) -> str:
     log(f"unpacking {xingque_src_filename}")
     subprocess.run(("tar", "-xf", xingque_src_filename), cwd=workdir, check=True)
 
+    # auditwheel 6.1.0+ has manylinux policies for riscv64, but the default
+    # is too low for our environment
+    # bump it up if that's the case
+    # the output looks like "auditwheel 6.1.0 installed ..."
+    auditwheel_ver_str = subprocess.check_output(
+        ["auditwheel", "--version"],
+        encoding="utf-8",
+    ).split(" ")[1]
+    auditwheel_ver = [int(x) for x in auditwheel_ver_str.split(".", 2)[:2]]
+    if platform.machine() == "riscv64":
+        if auditwheel_ver[0] > 6 or (auditwheel_ver[0] == 6 and auditwheel_ver[1] >= 1):
+            manylinux_plat = "manylinux_2_35_riscv64"
+            log(f"using manylinux platform tag: {manylinux_plat}")
+            os.environ["AUDITWHEEL_PLAT"] = manylinux_plat
+
     # build wheel
     log("building xingque wheel", group=True)
     subprocess.run(
         ("maturin", "build", "--release"),
         cwd=xingque_workdir,
         check=True,
     )
+
     maturin_out_path = os.path.join(xingque_workdir, "target", "wheels")
     tmp_wheel_path = os.path.join(
         maturin_out_path,