fftwQuad: Mark unsupported on aarch64 (#283554)

Author: Scrumplex

pkgs/development/libraries/fftw/default.nix

@@ -85,5 +85,7 @@ stdenv.mkDerivation (finalAttrs: {
       }.${precision}
     ];
     platforms = platforms.unix;
+    # quad-precision requires libquadmath from gfortran, but libquadmath is not supported on aarch64
+    badPlatforms = lib.optionals (precision == "quad-precision") platforms.aarch64;
   };
 })