size optimized examples build in flake, remove unstable compiler flags from makefile

dynamically linked bin is 16k

example/Makefile

@@ -39,16 +39,12 @@ CARGO_OBJDIR := cargo/$(RUST_TARGET)/$(_profile)
 _rust_cli_profile := $(if $(filter $(_profile),debug),dev,$(_profile))
 
 STRIPFLAGS += -s --strip-unneeded -R .comment -R .gnu.version -R .note -R .note.gnu.build-id -R .note.ABI-tag
-STATIC_LINK_LIBS += -lservicepoint_binding_c
 
-size_optimized_CARGOFLAGS += -Zbuild-std="core,std,alloc,proc_macro,panic_abort" \
-	-Zbuild-std-features="panic_immediate_abort"
 CARGOFLAGS += --manifest-path=$(REPO_ROOT)/Cargo.toml \
 	--profile=$(_rust_cli_profile) \
 	--no-default-features \
 	--features=$(FEATURES) \
 	--target=$(RUST_TARGET) \
-	$($(_profile)_CARGOFLAGS) \
 	--target-dir=cargo
 
 CFLAGS += -Wall -Wextra -pedantic -fwhole-program -fPIE -pie
@@ -73,7 +69,7 @@ debug_CFLAGS += -Og
 static_CFLAGS += -static $(STATIC_LINK_LIBS)
 dynamic_CFLAGS += -Wl,-Bstatic $(STATIC_LINK_LIBS) -Wl,-Bdynamic
 
-_servicepoint_cflags := -I $(REPO_ROOT)/include -L $(CARGO_OBJDIR)
+_servicepoint_cflags := $(pkg-config --libs servicepoint --cflags)
 CFLAGS += $($(_libc)_CFLAGS) $($(_profile)_CFLAGS) $($(_link_type)_CFLAGS) $(_servicepoint_cflags)
 ifeq ($(LTO), 1)
 	CFLAGS += -flto
@@ -120,4 +116,4 @@ build-rust:
 	$(CARGO) rustc $(CARGOFLAGS) -- $(RUSTFLAGS)
 
 #----- Begin Boilerplate
-endif
+endif

nix-build-all.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+set -e
+set -x
+
+nix build .#servicepoint-binding-c
+
+nix build .#servicepoint-binding-c-stable-release
+nix build .#servicepoint-binding-c-nightly-release
+nix build .#servicepoint-binding-c-nightly-size
+
+nix build .#all-examples
+nix build .#all-examples-size

packages.nix

@@ -8,12 +8,9 @@
 let
   version = "0.15.0";
   mkServicepoint =
-    {
+    rustPlatform:
-      rustPlatform,
-      buildType,
-    }:
     rustPlatform.buildRustPackage (finalAttrs: {
-      inherit buildType version;
+      inherit version;
 
       pname = "servicepoint-binding-c";
       src = lib.filter {
@@ -28,14 +25,15 @@ let
         ];
       };
       cargoLock.lockFile = ./Cargo.lock;
+      useFetchCargoVendor = true;
       meta = {
         description = "C bindings for the servicepoint crate.";
         homepage = "https://git.berlin.ccc.de/servicepoint/servicepoint-binding-c";
         license = lib.licenses.gpl3Plus;
         pkgConfigModules = [ "servicepoint" ];
       };
-      nativeBuildInputs = with pkgs; [ pkg-config ];
+      nativeBuildInputs = [ pkgs.pkg-config ];
-      buildInputs = with pkgs; [ xz ];
+      buildInputs = [ pkgs.xz ];
 
       preBuild = ''
         mkdir -p include
@@ -56,16 +54,17 @@ let
     pkgs.stdenv.mkDerivation {
       inherit version;
       pname = "servicepoint-c-example-${name}";
-
+      nativeBuildInputs = [ pkgs.pkg-config ];
-      nativeBuildInputs = with pkgs; [ pkg-config ];
+      buildInputs = [
-      buildInputs = [ servicepointBinding ];
+        servicepointBinding
+        pkgs.xz
+      ];
       src = ./example/src;
-
-      #dontUnpack = true;
       buildPhase = ''
+        set -e
+        set -x
         mkdir -p $out/bin
-
+        gcc ${name}.c $(pkg-config --libs --cflags servicepoint) $(pkg-config --libs --cflags liblzma) $EXTRA_CFLAGS -o $out/bin/${name}
-        gcc ${name}.c $(pkg-config --libs servicepoint --cflags) -o $out/bin/${name}
       '';
     };
   rustPlatform-stable = pkgs.rustPlatform;
@@ -83,21 +82,29 @@ let
   ];
 in
 rec {
-  servicepoint-binding-c-release = mkServicepoint {
+  servicepoint-binding-c-stable-release = mkServicepoint rustPlatform-stable;
-    buildType = "release";
+  servicepoint-binding-c-nightly-release = mkServicepoint rustPlatform-unstable;
-    rustPlatform = rustPlatform-stable;
+  servicepoint-binding-c-nightly-size = servicepoint-binding-c-nightly-release // {
-  };
-  servicepoint-binding-c-size-optimized = mkServicepoint {
     buildType = "size_optimized";
-    rustPlatform = rustPlatform-unstable;
+    buildNoDefaultFeatures = true;
+    # TODO: do these override the nix flags?
+    #CARGOFLAGS = ''-Zbuild-std="core,std,alloc,proc_macro,panic_abort" -Zbuild-std-features="panic_immediate_abort"'';
+    # TODO: those override the nix flags
+    # NIX_CFLAGS_COMPILE = builtins.toString ["-Oz" "-fwrapv" "-fomit-frame-pointer" "-fno-stack-protector" "-fno-unroll-loops" "-fno-unwind-tables" "-fno-asynchronous-unwind-tables" "-fmerge-all-constants" "-fvisibility=hidden" "-Bsymbolic" "-fno-ident" "-fno-exceptions" "-ffunction-sections" "-fdata-sections"];
+    # NIX_CFLAGS_LINK = builtins.toString ["Wl,-z,norelro" "-Wl,--hash-style=gnu" "-Wl,--gc-sections" "-Wl,--exclude-libs,ALL"];
   };
-  servicepoint-binding-c = servicepoint-binding-c-release;
+  servicepoint-binding-c = servicepoint-binding-c-stable-release;
 
   all-examples = pkgs.symlinkJoin {
     name = "servicepoint-all-examples";
-    paths = builtins.map (e: selfPkgs.${e}) examples;
+    paths = builtins.map (e: selfPkgs."${e}") examples;
+  };
+  all-examples-size = pkgs.symlinkJoin {
+    name = "servicepoint-all-examples-size";
+    paths = builtins.map (e: selfPkgs."${e}-size") examples;
   };
 }
+# construct one package per example
 // (lib.genAttrs examples (
   name:
   mkExample {
@@ -105,3 +112,43 @@ rec {
     servicepointBinding = selfPkgs.servicepoint-binding-c;
   }
 ))
+# construct another pakage per example, but with a different name and compiler options
+// (lib.mapAttrs'
+  (
+    name: value:
+    lib.nameValuePair ("${name}-size") (
+      value
+      // {
+        EXTRA_CFLAGS = builtins.toString [
+          "-Oz"
+          "-fwrapv"
+          "-fomit-frame-pointer"
+          "-fno-stack-protector"
+          "-fno-unroll-loops"
+          "-fno-unwind-tables"
+          "-fno-asynchronous-unwind-tables"
+          "-fmerge-all-constants"
+          "-fvisibility=hidden"
+          "-Bsymbolic"
+          "-fno-ident"
+          "-fno-exceptions"
+          "-ffunction-sections"
+          "-fdata-sections"
+          "-Wl,-z,norelro"
+          "-Wl,--hash-style=gnu"
+          "-Wl,--gc-sections"
+          "-Wl,--exclude-libs,ALL"
+        ];
+      }
+    )
+  )
+  (
+    lib.genAttrs examples (
+      name:
+      mkExample {
+        inherit name;
+        servicepointBinding = selfPkgs.servicepoint-binding-c-nightly-size;
+      }
+    )
+  )
+)