update installation README, Makefile changes

README.md

@@ -43,32 +43,37 @@ Please specify the full version including patch in your Cargo.toml until 1.0 is
 
 ## Installation
 
-1. Add this repo as a submodule:
-    ```bash
-    git submodule add https://git.berlin.ccc.de/servicepoint/servicepoint-binding-c.git
-    git commit -m "add servicepoint-binding-c submodule"
-    ```
-2. Add a build step for the servicepoint library. If you use make, this could look something like this:
-    ```
-    dependencies: FORCE
-    	cargo build --manifest-path=servicepoint-binding-c/Cargo.toml --release
-    FORCE: ; 
-    ```
-3. Link against the library. If you are on linux and linking statically:
-    ```
-    ${CC} main.c \
-    	-I servicepoint-binding-c/include \
-    	-L servicepoint-binding-c/target/release \
-    	-Wl,-Bstatic -lservicepoint_binding_c \
-    	-Wl,-Bdynamic -llzma \
-    	-o out/example
-    ```
+This manual uses gnumake, though it should work similarly for other build systems.
+
+Add this repo as a submodule:
+
+```bash
+git submodule add https://git.berlin.ccc.de/servicepoint/servicepoint-binding-c.git
+git commit -m "add servicepoint-binding-c submodule"
+```
+
+Update your Makefile:
+
+```Makefile
+# provide header and binary to CC
+CFLAGS += -I servicepoint-binding-c/include -L servicepoint-binding-c/target/release
+# link statically against servicepoint, link against lzma dynamically
+CFLAGS += -Wl,-Bstatic -lservicepoint_binding_c -Wl,-Bdynamic -llzma
+
+# add target to build rust library - cargo will check for dependency changes
+servicepoint-binding-c/target/release/libservicepoint.a:
+	cargo build --manifest-path=servicepoint-binding-c/Cargo.toml --release
+
+# add static lib as a dependency for your compilation
+# if you build .so files separately, this should be part of your build step
+my_bin: $(src) servicepoint-binding-c/target/release/libservicepoint.a
+	$(CC) $(src) $(CFLAGS) -o $@
+```
 
 You have the choice of linking statically (recommended) or dynamically.
-
-- The C example shows how to link statically against the `staticlib` variant.
-- When linked dynamically, you have to provide the `cdylib` at runtime in the _same_ version, as there are no API/ABI
+When linked dynamically, you have to provide the `cdylib` at runtime in the _same_ version, as there are no API/ABI
   guarantees yet.
+The Makefile in the example directory contains a bunch of additional compiler flags you might want to add depending on your use case.
 
 ## Notes on differences to rust library
 

example/Makefile

@@ -101,7 +101,7 @@ clean-rust:
 
 $(_unstripped_bins): out/%_unstripped: src/%.c $(SERVICEPOINT_HEADER_OUT)/servicepoint.h $(_sp_artifacts)
 	mkdir -p out || true
-	${CC} $< \
+	$(CC) $< \
 		-I $(SERVICEPOINT_HEADER_OUT) \
 		-L $(RUST_TARGET_DIR) \
 		$(CCFLAGS) \
@@ -113,7 +113,7 @@ $(_bins): out/%: out/%_unstripped
 $(_sp_artifacts): $(_rs_src)
 	mkdir -p $(SERVICEPOINT_HEADER_OUT) || true
 	# generate servicepoint header and library to link against
-	${CARGO} rustc $(CARGOFLAGS) -- $(RUSTFLAGS)
+	$(CARGO) rustc $(CARGOFLAGS) -- $(RUSTFLAGS)
 
 $(_run_programs): run_%: out/% FORCE
 	./$<

flake.nix

@@ -37,7 +37,6 @@
               xe
               xz
               libgcc
-              musl
               libunwind
               pkgsStatic.musl
             ];