clean up .PHONY and all

.github/workflows/rust.yml

@@ -36,9 +36,9 @@ jobs:
         run: output=$(git status --porcelain) && [ -z "$output" ]
 
       - name: build example -- glibc release
-        run: cd example && make clean && make LIBC=gnu LINK=dynamic PROFILE=release
+        run: cd example && make -r clean-all && make -r LIBC=gnu LINK=dynamic PROFILE=release
       - name: build example -- glibc debug
-        run: cd example && make clean && make LIBC=gnu LINK=dynamic PROFILE=debug
+        run: cd example && make -r clean-all && make -r LIBC=gnu LINK=dynamic PROFILE=debug
 
   build-size-gnu-unstable:
     runs-on: ubuntu-latest
@@ -53,5 +53,5 @@ jobs:
         run: rustup toolchain install nightly -t aarch64-unknown-linux-gnu -c rust-src --no-self-update
 
       - name: build example -- glibc size_optimized
-        run: cd example && make clean
-          && make LIBC=gnu LINK=dynamic PROFILE=size_optimized CARGO="rustup run nightly cargo" LTO=1
+        run: cd example && make clean-all -r
+          && make -r LIBC=gnu LINK=dynamic PROFILE=size_optimized CARGO="rustup run nightly cargo" LTO=1

example/Makefile

@@ -34,6 +34,7 @@ FEATURES := ""#"env_logger"
 
 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))
@@ -68,12 +69,19 @@ size_optimized_CFLAGS += -Oz \
 	-fno-ident \
 	-fno-exceptions \
 	$(_no_debug_cflags)
+
 release_CFLAGS += -O2 \
 	$(_no_debug_cflags)
 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)
+CFLAGS += $($(_libc)_CFLAGS) $($(_profile)_CFLAGS) $($(_link_type)_CFLAGS) $(_servicepoint_cflags)
+ifeq ($(LTO), 1)
+	CFLAGS += -flto
+endif
+
 size_optimized_RUSTFLAGS += -Zlocation-detail=none \
 	-Zfmt-debug=none \
 	-C link-arg=-z,norelro \
@@ -86,39 +94,28 @@ ifneq ($(_profile), debug)
 	RUSTFLAGS += -C link-arg=-s -C link-arg=-Wl,--gc-sections
 endif
 
-CARGO_OBJDIR := cargo/$(RUST_TARGET)/$(_profile)
-_servicepoint_cflags := -I $(REPO_ROOT)/include -L $(CARGO_OBJDIR)
-
-CFLAGS += $($(_libc)_CFLAGS) $($(_profile)_CFLAGS) $($(_link_type)_CFLAGS) $(_servicepoint_cflags)
-ifeq ($(LTO), 1)
-	CFLAGS += -flto
-endif
-
 # TODO: wildcard does not work with VPATH
 _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)))
 _bins := $(_programs)
 _unstripped_bins := $(addsuffix _unstripped, $(_bins))
-_run_programs := $(addprefix run_, $(_programs))
 
-# TODO: use cargo --target-dir to put rust binaries into same dir
+.SUFFIXES:
+
+.PHONY: all build-rust
 
 all: $(_bins)
 
-.PHONY: all clean sizes $(_run_programs) clean-c clean-rust build-rust help FORCE
-
 $(_unstripped_bins): %_unstripped: src/%.c src/helpers.h build-rust
 	$(CC) $< $(CFLAGS) -o $@
 
 $(_bins): %: %_unstripped
 	$(STRIP) $(STRIPFLAGS) $^ -o $@
 
-build-rust: FORCE
+build-rust:
 	# generate servicepoint header and library to link against
 	$(CARGO) rustc $(CARGOFLAGS) -- $(RUSTFLAGS)
 
-FORCE: ;
-
 #----- Begin Boilerplate
 endif

example/target.mk

@@ -33,7 +33,7 @@ Makefile : ;
 # and the source directory containing only source files, `clean' is as trivial
 # as removing the target directories!
 #
-.PHONY: clean clean-all
+.PHONY: clean clean-all help
 clean:
 	rm -rf $(OBJDIR)
 clean-all:
@@ -50,3 +50,7 @@ help:
 	@echo "CARGO    | cargo binary to use  | 'cargo'   | 'rustup run nightly cargo'"
 	@echo "CC       | C compiler to use    | 'gcc'     | 'musl-gcc'"
 	@echo "STRIP    | strip command to use | 'strip'   | -"
+	@echo ""
+	@echo "When building this project, each configuration will result in a separate output directory."
+	@echo "The target clean only removes the output directory of the specified configuration."
+	@echo "The target clean-all can be used to remove the builds of all configurations."