@ is the comment character in armv7 assembler.

--- v0.3.30/cpuid.S	2025-06-19 21:57:27.000000000 +0100
+++ v0.3.30/cpuid.S	2025-06-20 23:16:40.901800219 +0100
@@ -66,5 +66,9 @@
 
 #endif
 #if defined(__ELF__) && defined(__linux__)
+#ifdef __arm__
+        .section        .note.GNU-stack,"",%progbits
+#else
         .section        .note.GNU-stack,"",@progbits
 #endif
+#endif