proper use of `$(DESTDIR)`

@rofl0r @ [1]

"...still it's unusual/unexpected to embed DESTDIR in LIBPATH
etc. where this could hickup is when for example hardcoded paths need
to be embedded into the resulting binary. for example, in the
netbsd-curses makefile i linked earlier, such a case would be reference
to the terminfo DB location, which is derived from PREFIX.
other possible cases might be stuff that dlopen()s its own libs using an
absolute path, or uses other data files. for such a case a contributor
would typically re-use DATAPATH oslt and put it into CPPFLAGS or write
it into a header, to find the required files. when now these paths have
DESTDIR in them too, this will not work. thus it is good practice to use
$(DESTDIR) only in install targets, and keep it out of other vars."


[1] https://github.com/libtom/libtomcrypt/commit/8e29a6061f3ad7bc7c5c2aeae73705e890ce1ea9#commitcomment-22678488

This closes #232

makefile.shared

@@ -47,8 +47,8 @@ $(LIBNAME): $(OBJECTS)
 
 install: .common_install
 	sed -e 's,^prefix=.*,prefix=$(PREFIX),' -e 's,^Version:.*,Version: $(VERSION),' libtomcrypt.pc.in > libtomcrypt.pc
-	install -d $(LIBPATH)/pkgconfig
-	install -m 644 libtomcrypt.pc $(LIBPATH)/pkgconfig/
+	install -d $(DESTDIR)/$(LIBPATH)/pkgconfig
+	install -m 644 libtomcrypt.pc $(DESTDIR)/$(LIBPATH)/pkgconfig/
 
 install_bins: .common_install_bins
 

makefile.unix

@@ -25,10 +25,10 @@
 #The following can be overridden from command line e.g. "make -f makefile.unix CC=gcc ARFLAGS=rcs"
 DESTDIR   =
 PREFIX    = /usr/local
-LIBPATH   = $(DESTDIR)$(PREFIX)/lib
-INCPATH   = $(DESTDIR)$(PREFIX)/include
-DATAPATH  = $(DESTDIR)$(PREFIX)/share/doc/libtomcrypt/pdf
-BINPATH   = $(DESTDIR)$(PREFIX)/bin
+LIBPATH   = $(PREFIX)/lib
+INCPATH   = $(PREFIX)/include
+DATAPATH  = $(PREFIX)/share/doc/libtomcrypt/pdf
+BINPATH   = $(PREFIX)/bin
 CC        = cc
 AR        = ar
 ARFLAGS   = r
@@ -272,17 +272,17 @@ clean:
 
 #Install the library + headers
 install: $(LIBMAIN_S) $(HEADERS)
-	@mkdir -p $(INCPATH) $(LIBPATH)/pkgconfig
-	@cp $(LIBMAIN_S) $(LIBPATH)/
-	@cp $(HEADERS) $(INCPATH)/
-	@sed -e 's,^prefix=.*,prefix=$(PREFIX),' -e 's,^Version:.*,Version: $(VERSION),' libtomcrypt.pc.in > $(LIBPATH)/pkgconfig/libtomcrypt.pc
+	@mkdir -p $(DESTDIR)/$(INCPATH) $(DESTDIR)/$(LIBPATH)/pkgconfig
+	@cp $(LIBMAIN_S) $(DESTDIR)/$(LIBPATH)/
+	@cp $(HEADERS) $(DESTDIR)/$(INCPATH)/
+	@sed -e 's,^prefix=.*,prefix=$(PREFIX),' -e 's,^Version:.*,Version: $(VERSION),' libtomcrypt.pc.in > $(DESTDIR)/$(LIBPATH)/pkgconfig/libtomcrypt.pc
 
 #Install useful tools
 install_bins: hashsum
-	@mkdir -p $(BINPATH)
-	@cp hashsum $(BINPATH)/
+	@mkdir -p $(DESTDIR)/$(BINPATH)
+	@cp hashsum $(DESTDIR)/$(BINPATH)/
 
 #Install documentation
 install_docs: doc/crypt.pdf
-	@mkdir -p $(DATAPATH)
-	@cp doc/crypt.pdf $(DATAPATH)/
+	@mkdir -p $(DESTDIR)/$(DATAPATH)
+	@cp doc/crypt.pdf $(DESTDIR)/$(DATAPATH)/

makefile_include.mk

@@ -132,10 +132,10 @@ TIMINGS=demos/timing.o
 #BINPATH  The directory to install the binaries provided.
 DESTDIR  ?=
 PREFIX   ?= /usr/local
-LIBPATH  ?= $(DESTDIR)$(PREFIX)/lib
-INCPATH  ?= $(DESTDIR)$(PREFIX)/include
-DATAPATH ?= $(DESTDIR)$(PREFIX)/share/doc/libtomcrypt/pdf
-BINPATH  ?= $(DESTDIR)$(PREFIX)/bin
+LIBPATH  ?= $(PREFIX)/lib
+INCPATH  ?= $(PREFIX)/include
+DATAPATH ?= $(PREFIX)/share/doc/libtomcrypt/pdf
+BINPATH  ?= $(PREFIX)/bin
 
 #Who do we install as?
 ifdef INSTALL_USER
@@ -362,18 +362,18 @@ install_all: install install_bins install_docs install_test
 INSTALL_OPTS ?= -m 644
 
 .common_install: $(LIBNAME)
-	install -d $(INCPATH)
-	install -d $(LIBPATH)
-	$(INSTALL_CMD) $(INSTALL_OPTS) $(LIBNAME) $(LIBPATH)/$(LIBNAME)
-	install -m 644 $(HEADERS) $(INCPATH)
+	install -d $(DESTDIR)/$(INCPATH)
+	install -d $(DESTDIR)/$(LIBPATH)
+	$(INSTALL_CMD) $(INSTALL_OPTS) $(LIBNAME) $(DESTDIR)/$(LIBPATH)/$(LIBNAME)
+	install -m 644 $(HEADERS) $(DESTDIR)/$(INCPATH)
 
 .common_install_bins: $(USEFUL_DEMOS)
 	install -d $(BINPATH)
-	$(INSTALL_CMD) -m 775 $(USEFUL_DEMOS) $(BINPATH)
+	$(INSTALL_CMD) -m 775 $(USEFUL_DEMOS) $(DESTDIR)/$(BINPATH)
 
 install_docs: doc/crypt.pdf
 	install -d $(DATAPATH)
-	install -m 644 doc/crypt.pdf $(DATAPATH)
+	install -m 644 doc/crypt.pdf $(DESTDIR)/$(DATAPATH)
 
 install_hooks:
 	for s in `ls hooks/`; do ln -s ../../hooks/$$s .git/hooks/$$s; done