Merge branch 'manpage-install'

Makefile

@@ -17,6 +17,8 @@
 DESTDIR ?= dist
 PREFIX ?= /usr/local
 
+MANDIR != [ $(PREFIX) = / ] && printf '/usr/share/man\n' \
+	|| printf '/share/man\n'
 SYSEXITS != printf '\043include <sysexits.h>\n' | cpp -M - | sed 's/ /\n/g' \
 	| sed -n 's/sysexits\.h//p' || printf 'include\n'
 
@@ -42,7 +44,7 @@ clean:
 dist: all
 	mkdir -p $(DESTDIR)/$(PREFIX)/bin $(DESTDIR)/$(PREFIX)/share/man/man1
 	cp build/bin/* $(DESTDIR)/$(PREFIX)/bin
-	cp docs/*.1 $(DESTDIR)/$(PREFIX)/share/man/man1
+	cp docs/*.1 $(DESTDIR)/$(PREFIX)/$(MANDIR)/man1
 
 .PHONY: install
 install: dist
@@ -102,7 +104,6 @@ mm: build/bin/mm
 build/bin/mm: src/mm.c build
 	$(CC) $(CFLAGS) -o $@ src/mm.c
 
-
 .PHONY: npc
 npc: build/bin/npc
 build/bin/npc: src/npc.c build