fix(c): simplify the template config files

c/.gitignore

@@ -4,12 +4,10 @@ hello
 # build
 *.[aod]
 
-# config
+# language support
 compile_commands.json
-.pre-commit-config.yaml
 .cache
 
 # nix
 .direnv
-.envrc
 result

c/Makefile

@@ -8,10 +8,6 @@ SRC += main.c
 OBJ := $(SRC:.c=.o)
 
 CFLAGS += @compile_flags.txt
-CFLAGS += -ffunction-sections -fdata-sections
-
-LDFLAGS := -fwhole-program -flto
-LDFLAGS += -Wl,--gc-sections -s
 
 RM ?= rm -f
 

c/compile_flags.txt

@@ -3,16 +3,6 @@
 -pipe
 
 -Wall
--Wcast-qual
--Wconversion
--Werror=return-type
--Werror=vla-larger-than=0
 -Wextra
--Wmissing-prototypes
--Wshadow
--Wstrict-prototypes
--Wwrite-strings
 
 -O2
--march=native
--mtune=native

c/flake.nix

@@ -8,37 +8,22 @@
     let
       forAllSystems =
         function:
-        nixpkgs.lib.genAttrs [
-          "x86_64-linux"
-          "aarch64-linux"
-          "x86_64-darwin"
-          "aarch64-darwin"
-          "i686-linux"
-          "mipsel-linux"
-          "powerpc64le-linux"
-        ] (system: function nixpkgs.legacyPackages.${system});
+          nixpkgs.lib.genAttrs
+          nixpkgs.lib.systems.flakeExposed
+          (system: function nixpkgs.legacyPackages.${system});
     in
     rec {
       devShells = forAllSystems (pkgs: {
         default = pkgs.mkShell {
-          hardeningDisable = [ "fortify" ];
-          inputsFrom = pkgs.lib.attrsets.attrValues packages;
+          inputsFrom = [ packages.${pkgs.system}.hello ];
         };
       });
 
       packages = forAllSystems (pkgs: rec {
         default = hello;
-        hello = pkgs.callPackage ./default.nix { };
+        hello = pkgs.callPackage ./hello.nix { };
       });
 
-      overlays.default = final: prev: { hello = final.callPackage ./default.nix { }; };
-
-      apps = forAllSystems (pkgs: rec {
-        default = hello;
-        hello = {
-          program = "${packages.${pkgs.system}.hello}/bin/hello";
-          type = "app";
-        };
-      });
+       overlays.default = final: prev: { hello = prev.callPackage ./default.nix { }; };
     };
 }