drop target CPU for aarch64 to cortex-a53 instead of cortex-a73

Signed-off-by: strawberry <strawberry@puppygock.gay>

nix/pkgs/main/cross-compilation-env.nix

@@ -18,7 +18,7 @@ lib.optionalAttrs stdenv.hostPlatform.isStatic {
           [ "-C" "target-cpu=x86-64-v2" ]
         ++ lib.optionals
           stdenv.targetPlatform.isAarch64
-          [ "-C" "target-cpu=cortex-a55" ] # cortex-a55 == ARMv8.2-a
+          [ "-C" "target-cpu=cortex-a53" ] # cortex-a53 == ARMv8-A
         # This disables PIE for static builds, which isn't great in terms
         # of security. Unfortunately, my hand is forced because nixpkgs'
         # `libstdc++.a` is built without `-fPIE`, which precludes us from

nix/pkgs/main/default.nix

@@ -97,7 +97,7 @@ buildDepsOnlyEnv =
         else if stdenv.targetPlatform.isAarch64
         then lib.subtractLists [ "-DPORTABLE=1" ] old.cmakeFlags
         ++ lib.optionals stdenv.targetPlatform.isAarch64 [
-          # cortex-a73 == ARMv8-A
+          # cortex-a53 == ARMv8-A
           "-DPORTABLE=armv8-a"
         ]
         else old.cmakeFlags;
@@ -131,7 +131,7 @@ buildPackageEnv = {
     + lib.optionalString stdenv.targetPlatform.isx86_64
       " -Ctarget-cpu=x86-64-v2"
     + lib.optionalString stdenv.targetPlatform.isAarch64
-      " -Ctarget-cpu=cortex-a73"; # cortex-a73 == ARMv8-A
+      " -Ctarget-cpu=cortex-a53"; # cortex-a53 == ARMv8-A
 };