GNUmakefile: replaced with POSIX Makefile

.gitignore

@@ -1 +1,2 @@
 build/
+dist/

Makefile

@@ -7,9 +7,10 @@
 # permitted in any medium without royalty provided the copyright notice and this
 # notice are preserved.  This file is offered as-is, without any warranty.
 
-# If we want to use POSIX make we can’t use ifeq
+.POSIX:
-# .POSIX:
+.PRAGMA: posix_202x # future POSIX standard support à la pdpmake(1)
-# .PRAGMA: posix_202x
+
+.PHONY: all
 .PHONY: clean
 .PHONY: install
 .PHONY: test
@@ -19,73 +20,67 @@ PREFIX=/usr/local
 CC=cc
 CFLAGS=-O3 -Lbuild/lib -idirafter include
 
-RUSTC=rustc +nightly
+RUSTC=rustc
-RUSTCFLAGS=-Zlocation-detail=none -Copt-level=z -Ccodegen-units=1 \
+RUSTCFLAGS=-Copt-level=z -Ccodegen-units=1 -Cpanic=abort -Clto=y \
-	-Cpanic=abort -Clto=y -Cstrip=symbols -Ctarget-cpu=native \
+	-Cstrip=symbols -Ctarget-cpu=native \
 	--extern sysexits=build/o/libsysexits.rlib
 
-ifeq ($(CC), gcc)
+all: false fop intcmp scrut str strcmp true test
-	CFLAGS=-O3 -s -Wl,-z,noseparate-code,-z,nosectionheader -flto -Lbuild/lib \
-		-idirafter include
-endif
 
-ifeq ($(CC), clang)
+build:
-	CFLAGS=-O3 -Wall -Lbuild/lib -idirafter include
-endif
-
-ifeq ($(CC), tcc)
-	CFLAGS=-O3 -s -Wl -flto -Lbuild/lib -idirafter include
-endif
-
-build: build_dir false intcmp scrut str strcmp true
-
-build_dir:
 	# keep build/include until bindgen(1) has stdin support
 	# https://github.com/rust-lang/rust-bindgen/issues/2703
-	mkdir -p build/bin build/include build/lib build/o
+	mkdir -p build/bin build/include build/o # build/lib
 
 clean:
-	rm -rf build/
+	rm -rf build/ dist/
 
-install: build
+dist: all
-	mkdir -p $(PREFIX)/bin $(PREFIX)/lib
+	mkdir -p \
-	mkdir -p $(PREFIX)/man/man1 $(PREFIX)/man/man3
+	dist/bin \
-	cp -f build/lib/*.so $(PREFIX)/lib/
+	dist/man/man1 \
-	cp -f build/bin/* $(PREFIX)/bin/
+	# dist/$(PREFIX)/lib \
-	cp -f docs/*.1 $(PREFIX)/man/man1/
+	# dist/$(PREFIX)/man/man3
-	cp -f docs/*.3 $(PREFIX)/man/man3/
+	cp build/bin/* dist/bin/
+	# cp build/lib/* dist/$(PREFIX)/lib/
+	cp docs/*.1 dist/man/man1/
+	# cp docs/*.3 dist/$(PREFIX)/man/man3/
+
+install: dist
+	mkdir -p $(PREFIX)
+	cp -r dist/* $(PREFIX)/
 
 test: build
 	tests/cc-compat.sh
 	tests/posix-compat.sh
 
-sysexits: build_dir
+sysexits: build
 	# bandage solution until bindgen(1) gets stdin support
 	printf '#define EXIT_FAILURE 1\n' | cat - include/sysexits.h \
 		> build/include/sysexits.h 
-	bindgen --default-macro-constant-type signed --use-core \
+	bindgen --default-macro-constant-type signed --use-core --formatter=none \
 		"$$(printf '#include <sysexits.h>\n' \
 			| cpp -M -idirafter "build/include" - \
 			| sed 's/ /\n/g' | grep sysexits.h)" \
 		| $(RUSTC) $(RUSTCFLAGS) --crate-type lib -o build/o/libsysexits.rlib -
 
-false: src/false.rs build_dir
+false: src/false.rs build
 	$(RUSTC) $(RUSTCFLAGS) -o build/bin/false src/false.rs
 
-fop: src/fop.rs build_dir sysexits
+fop: src/fop.rs build sysexits
 	$(RUSTC) $(RUSTCFLAGS) -o build/bin/fop src/fop.rs
 
-intcmp: src/intcmp.c build_dir
+intcmp: src/intcmp.c build
 	$(CC) $(CFLAGS) -o build/bin/intcmp src/intcmp.c
 
-scrut: src/scrut.c build_dir
+scrut: src/scrut.c build
 	$(CC) $(CFLAGS) -o build/bin/scrut src/scrut.c
 
-str: src/str.c build_dir
+str: src/str.c build
 	$(CC) $(CFLAGS) -o build/bin/str src/str.c
 
-strcmp: src/strcmp.c build_dir
+strcmp: src/strcmp.c build
 	$(CC) $(CFLAGS) -o build/bin/strcmp src/strcmp.c
 
-true: src/true.rs build_dir
+true: src/true.rs build
 	$(RUSTC) $(RUSTCFLAGS) -o build/bin/true src/true.rs