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SHELL = /bin/sh
prefix = /usr/local
VERSION = $(shell git describe --dirty --always)
DATE_FMT = +%b %d %Y %H:%M:%S UTC
ifdef SOURCE_DATE_EPOCH
BUILD_DATE ?= $(shell \
date -u -d "@$(SOURCE_DATE_EPOCH)" "$(DATE_FMT)" 2>/dev/null \
|| date -u -r "@$(SOURCE_DATE_EPOCH)" "$(DATE_FMT)" 2>/dev/null \
|| date -u "$(DATE_FMT)")
else
BUILD_DATE ?= $(shell date -u "$(DATE_FMT)")
endif
INSTALL = install
FEATURE_TEST_MACROS = _GNU_SOURCE
CFLAGS += -Wall $(addprefix -D, $(FEATURE_TEST_MACROS)) \
-DVERSION="\"$(VERSION)\"" -DBUILD_DATE="\"$(BUILD_DATE)\""
LDFLAGS +=
TARGETS := exchange
MAINS := $(addsuffix .o, $(TARGETS))
OBJ := $(MAINS)
MAN1 := exchange.1
MAN1_GZ := $(addsuffix .gz, $(MAN1))
.PHONY: all
all: $(TARGETS) $(MAN1_GZ)
.PHONY: clean
clean:
rm -f $(OBJ) $(TARGETS) $(MAN1_GZ)
.PHONY: distclean
distclean: clean
.PHONY: install
install: $(TARGETS) $(MAN1_GZ)
$(INSTALL) -Dt "$(DESTDIR)$(prefix)/bin" $(TARGETS)
$(INSTALL) -Dt "$(DESTDIR)$(prefix)/share/man/man1" $(MAN1_GZ)
.PHONY: uninstall
uninstall:
cd $(DESTDIR)$(prefix)/bin && rm -f $(TARGETS)
cd $(DESTDIR)$(prefix)/share/man/man1 && rm -f $(MAN1_GZ)
$(TARGETS): % : %.o
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
$(MAN1_GZ): %.gz : %
gzip -9 -k -f $^
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