add gcc9

Author: moesoha

default.nix

@@ -1,8 +1,10 @@
-let pkgs = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/57be0c5d9650a5c3970439ba7a1f4a017cd98cc0.tar.gz") {
-	overlays = [
-		(import (builtins.fetchTarball "https://github.com/oxalica/rust-overlay/archive/master.tar.gz"))
-	];
-});
+let
+	pkgs = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/57be0c5d9650a5c3970439ba7a1f4a017cd98cc0.tar.gz") {
+		overlays = [
+			(import (builtins.fetchTarball "https://github.com/oxalica/rust-overlay/archive/master.tar.gz"))
+		];
+	});
+	luoguGcc = import ./gcc-luogu { inherit pkgs; };
 in with pkgs; {
 	# Basic utils
 	inherit coreutils;
@@ -14,7 +16,8 @@ in with pkgs; {
 	inherit gzip;
 
 	# C, C++
-	gcc = (callPackage ./gcc-luogu { inherit pkgs; }).gcc;
+	gcc = luoguGcc.gcc;
+	# gcc9 = luoguGcc.gcc9; # NOI/NOIP uses GCC 9.3.0
 
 	# Rust
 	rust = rust-bin.nightly."2021-11-22".default;

gcc-luogu/default.nix

@@ -1,16 +1,26 @@
 { pkgs ? import <nixpkgs> {} }: with pkgs;
 let
 	pname = "luogu-gcc";
-	sourceCC = gcc11.cc;
-
-	cc = sourceCC.overrideAttrs(a: with a; {
+	
+	cc = gcc11.cc.overrideAttrs(a: with a; {
 		inherit pname;
 		patches = patches ++ [
 			./disable-pragma-and-attribute-for-optimize.patch
 		];
 	});
 	gcc = wrapCC(cc);
+	
+	cc9 = pkgs.gcc9.cc.overrideAttrs(a: with a; {
+		inherit pname;
+		patches = patches ++ [
+			./disable-pragma-and-attribute-for-optimize.patch
+		];
+	});
+	gcc9 = wrapCC(cc9);
 in {
 	inherit gcc;
 	inherit cc;
+	
+	inherit gcc9;
+	inherit cc9;
 }