Refactor the Makefile

The previous version of the Makefile used features which are specific to
GNU Make and therefore does not works on BSD systems. This new version,
which is much more simpler, works both on GNU Make and BSD Make (tested
on FreeBSD 12.1).

CHANGELOG.md

@@ -13,6 +13,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [Unreleased]
+
+### Fixed
+- The Makefile now works on FreeBSD. It should also work on other BSD although it has not been tested.
+
+
 ## [0.9.0] - 2020-08-01
 
 ### Added

Makefile

@@ -5,34 +5,27 @@ DATAROOTDIR = $(PREFIX)/share
 DATADIR = $(DATAROOTDIR)
 SYSCONFDIR = /etc
 TARGET_DIR = ./target/release
-EXE_NAMES =	acmed \
-		tacd
-EXE_FILES = $(foreach name,$(EXE_NAMES),$(TARGET_DIR)/$(name))
 MAN_SRC_DIR = ./man/en
 MAN_DST_DIR = $(TARGET_DIR)/man
-MAN_SRC =	acmed.8 \
-		acmed.toml.5 \
-		tacd.8
-MAN_FILES = $(foreach name,$(MAN_SRC),$(MAN_DST_DIR)/$(name).gz)
 
-all: update $(EXE_FILES) man
+all: update acmed tacd man
 
-man: $(MAN_DST_DIR) $(MAN_FILES)
+update:
+	cargo update
 
-$(EXE_NAMES): %: $(TARGET_DIR)/%
+acmed:
+	cargo build --release --bin acmed
+	strip "$(TARGET_DIR)/acmed"
 
-$(EXE_FILES): $(TARGET_DIR)/%: %/Cargo.toml
-	cargo build --release --bin $(subst /Cargo.toml,,$<)
-	strip $@
+tacd:
+	cargo build --release --bin tacd
+	strip "$(TARGET_DIR)/tacd"
 
-$(MAN_DST_DIR):
+man:
 	@mkdir -p $(MAN_DST_DIR)
-
-$(MAN_DST_DIR)/%.gz: $(MAN_SRC_DIR)/%
-	gzip <"$<" >"$@"
-
-update:
-	cargo update
+	gzip <"$(MAN_SRC_DIR)/acmed.8" >"$(MAN_DST_DIR)/acmed.8.gz"
+	gzip <"$(MAN_SRC_DIR)/acmed.toml.5" >"$(MAN_DST_DIR)/acmed.toml.5.gz"
+	gzip <"$(MAN_SRC_DIR)/tacd.8" >"$(MAN_DST_DIR)/tacd.8.gz"
 
 install:
 	install -D -m 0755 $(TARGET_DIR)/acmed $(DESTDIR)$(BINDIR)/acmed
@@ -48,4 +41,4 @@ install:
 clean:
 	cargo clean
 
-.PHONY: $(EXE_NAMES) all clean install man update
+.PHONY: all update acmed tacd man install clean