more configs work now

```
make LIBC=gnu LINK=dynamic
make LIBC=musl LINK=dynamic CC=musl-gcc
make LIBC=musl LINK=static CC=musl-gcc
```

example/Makefile

@@ -36,7 +36,6 @@ THIS_DIR := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
 REPO_ROOT := $(realpath $(THIS_DIR)/..)
 CARGO_OBJDIR := cargo/$(RUST_TARGET)/$(_profile)
 
-# TODO: check if override is needed
 _rust_cli_profile := $(if $(filter $(_profile),debug),dev,$(_profile))
 
 # TODO: `make LINK=static` fails with linker error "undefined reference to `_dl_find_object'" in libgcc_eh.a
@@ -57,7 +56,7 @@ CARGOFLAGS += --manifest-path=$(REPO_ROOT)/Cargo.toml \
 CFLAGS += -Wall -Wextra -pedantic -fwhole-program -fPIE -pie
 _no_debug_cflags := -ffunction-sections -fdata-sections -Wl,--gc-sections
 size_optimized_CFLAGS += -Oz \
-	-fwrapv -fomit-frame-pointer -fno-stack-protector\
+	-fwrapv -fomit-frame-pointer -fno-stack-protector \
 	-fno-unroll-loops \
 	-fno-unwind-tables -fno-asynchronous-unwind-tables \
 	-fmerge-all-constants \
@@ -85,16 +84,16 @@ endif
 size_optimized_RUSTFLAGS += -Zlocation-detail=none \
 	-Zfmt-debug=none \
 	-C link-arg=-z,norelro \
-	-C panic=abort
-	#-C link-arg=--hash-style=gnu
-musl_RUSTFLAGS += --crate-type=staticlib -Ctarget-feature=-crt-static
+	-C panic=abort \
+	-C link-arg=-Wl,--hash-style=gnu
+static_RUSTFLAGS += --crate-type=staticlib -Ctarget-feature=+crt-static
 
 RUSTFLAGS += $($(_libc)_RUSTFLAGS) $($(_profile)_RUSTFLAGS) $($(_link_type)_RUSTFLAGS)
 ifneq ($(_profile), debug)
 	RUSTFLAGS += -C link-arg=-s -C link-arg=-Wl,--gc-sections
 endif
 
-# TODO: wildcard does not work with VPATH
+# ADD NEW EXAMPLES HERE
 _c_src := src/announce.c src/brightness_tester.c src/header_logger.c \
 	src/moving_line.c src/random_stuff.c src/wiping_clear.c
 _programs := $(basename $(notdir $(_c_src)))

flake.lock

@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1748037224,
-        "narHash": "sha256-92vihpZr6dwEMV6g98M5kHZIttrWahb9iRPBm1atcPk=",
+        "lastModified": 1748302896,
+        "narHash": "sha256-ixMT0a8mM091vSswlTORZj93WQAJsRNmEvqLL+qwTFM=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "f09dede81861f3a83f7f06641ead34f02f37597f",
+        "rev": "7848cd8c982f7740edf76ddb3b43d234cb80fc4d",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-24.11",
+        "ref": "nixos-25.05",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -2,7 +2,7 @@
   description = "Flake for the servicepoint library.";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
   };
 
   outputs =
@@ -31,37 +31,41 @@
     {
       devShells = forAllSystems (
         { pkgs, system }:
+        let
+          toolchain = pkgs.symlinkJoin {
+            name = "rust-toolchain";
+            paths = with pkgs; [
+              rustc
+              cargo
+              rustPlatform.rustcSrc
+              rustPlatform.rustLibSrc
+              rustfmt
+              clippy
+              cargo-expand
+              cargo-tarpaulin
+            ];
+          };
+        in
         {
           default = pkgs.mkShell rec {
-            buildInputs = with pkgs; [
+            packages = with pkgs; [
+              toolchain
+              gcc
+              gdb
+              gnumake
+              pkg-config
               xe
               xz
               libgcc
               libunwind
+              pkgsStatic.gcc
+              pkgsStatic.libgcc
               pkgsStatic.musl
             ];
 
-            nativeBuildInputs = with pkgs; [
-              (pkgs.symlinkJoin {
-                name = "rust-toolchain";
-                paths = with pkgs; [
-                  rustc
-                  cargo
-                  rustPlatform.rustcSrc
-                  rustfmt
-                  clippy
-                  cargo-expand
-                  cargo-tarpaulin
-                ];
-              })
-              gcc
-              gdb
-              pkgsStatic.gcc
-              gnumake
-              pkg-config
-            ];
-
-            RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+            RUST_SRC_PATH = "${pkgs.rustPlatform.rustLibSrc}";
+            RUST_BACKTRACE = 1;
+            RUST_LOG = "all";
           };
         }
       );