New Makefile variable PREFIX_MAN, to install man pages wherever you want.

Makefile

@@ -1,4 +1,5 @@
 PREFIX=/usr/local
+PREFIX_MAN=$(PREFIX)/man
 CFLAGS=-g -Wall
 
 all: snac
@@ -17,12 +18,12 @@ dep:
 
 install:
 	install -m 755 snac $(PREFIX)/bin/snac
-	mkdir -p -m 755 $(PREFIX)/man/man1
-	install -m 644 doc/snac.1 $(PREFIX)/man/man1/snac.1
-	mkdir -p -m 755 $(PREFIX)/man/man5
-	install -m 644 doc/snac.5 $(PREFIX)/man/man5/snac.5
-	mkdir -p -m 755 $(PREFIX)/man/man8
-	install -m 644 doc/snac.8 $(PREFIX)/man/man8/snac.8
+	mkdir -p -m 755 $(PREFIX_MAN)/man1
+	install -m 644 doc/snac.1 $(PREFIX_MAN)/man1/snac.1
+	mkdir -p -m 755 $(PREFIX_MAN)/man5
+	install -m 644 doc/snac.5 $(PREFIX_MAN)/man5/snac.5
+	mkdir -p -m 755 $(PREFIX_MAN)/man8
+	install -m 644 doc/snac.8 $(PREFIX_MAN)/man8/snac.8
 
 activitypub.o: activitypub.c xs.h xs_encdec.h xs_json.h xs_curl.h \
   xs_mime.h xs_openssl.h xs_regex.h xs_time.h snac.h