Fix stat.h check on Alpine.

Author: nascheme

Tools/configure/conf_platform.py

@@ -586,7 +586,7 @@ def check_structs(v):
             "struct statx.stx_dio_read_offset_align",
             "struct statx.stx_atomic_write_unit_max_opt",
         ):
-            pyconf.check_member(m, includes=["linux/stat.h"])
+            pyconf.check_member(m)
 
     # altzone in time.h
     pyconf.checking("for time.h that defines altzone")

Tools/configure/pyconf.py

@@ -2551,7 +2551,10 @@ def check_member(member: str, includes: list[str] | None = None) -> bool:
     if len(parts) != 2:
         return False
     struct_name, field = parts
-    inc_lines = "".join(f"#include <{h}>\n" for h in (includes or []))
+    if includes is not None:
+        inc_lines = "".join(f"#include <{h}>\n" for h in includes)
+    else:
+        inc_lines = _ac_includes_default()
     src = (
         f"{inc_lines}\n"
         f"int main(void) {{\n"