--- Makefile.orig	2018-01-18 22:20:20.000000000 +0000
+++ Makefile	2018-05-06 03:35:05.000000000 +0000
@@ -575,7 +575,7 @@
 ifeq ($(target),Darwin)
 
 # default INCDIR for macOS
-INCDIR= /usr/local/include
+INCDIR= ___PREFIX___/include
 
 else
 #endif	/* end of skip for non-Gnu makefiles */
@@ -638,7 +638,7 @@
 ifeq ($(target),Darwin)
 
 # default BINDIR for macOS
-BINDIR= /usr/local/bin
+BINDIR= ___PREFIX___/bin
 
 else
 #endif	/* end of skip for non-Gnu makefiles */
@@ -654,7 +654,7 @@
 ifeq ($(target),Darwin)
 
 # default LIBDIR for macOS
-LIBDIR= /usr/local/lib
+LIBDIR= ___PREFIX___/lib
 
 else
 #endif	/* end of skip for non-Gnu makefiles */
@@ -670,7 +670,7 @@
 ifeq ($(target),Darwin)
 
 # default CALC_SHAREDIR for macOS
-CALC_SHAREDIR= /usr/local/share/calc
+CALC_SHAREDIR= ___PREFIX___/share/calc
 
 else
 #endif	/* end of skip for non-Gnu makefiles */
@@ -749,7 +749,7 @@
 #
 # If in doubt, use T=
 #
-T=
+T=___DESTROOT___
 
 # where man pages are installed
 #
@@ -760,7 +760,7 @@
 #MANDIR=
 #MANDIR= /usr/local/man/man1
 #MANDIR= /usr/man/man1
-MANDIR= /usr/share/man/man1
+MANDIR= ___PREFIX___/share/man/man1
 #MANDIR= /dev/env/DJDIR/man/man1
 #MANDIR= /usr/man/u_man/man1
 #MANDIR= /usr/contrib/man/man1
@@ -895,11 +895,11 @@
 #
 # If in doubt, set USE_READLINE, READLINE_LIB and READLINE_INCLUDE to nothing.
 #
-USE_READLINE=
-#USE_READLINE= -DUSE_READLINE
+#USE_READLINE=
+USE_READLINE= -DUSE_READLINE
 #
-READLINE_LIB=
-READLINE_EXTRAS=
+#READLINE_LIB=
+#READLINE_EXTRAS=
 #
 #READLINE_LIB= -lreadline
 #READLINE_EXTRAS= -lhistory -lncurses
@@ -910,6 +910,9 @@
 #READLINE_LIB= -L/usr/local/lib -lreadline
 #READLINE_EXTRAS= -lhistory -lncurses
 #
+READLINE_LIB= -L___PREFIX___/lib -lreadline
+READLINE_EXTRAS= -lhistory -lncurses
+#
 # For Apple OS X: install fink from http://fink.sourceforge.net
 #		  and then do a 'fink install readline' and then use:
 #
@@ -1314,8 +1317,8 @@
 CCOPT= ${DEBUG}
 CCMISC= ${DARWIN_ARCH}
 #
-LCC= clang
-CC= ${PURIFY} ${LCC} ${CCWERR}
+LCC= ${CC}
+#CC= ${PURIFY} ${LCC} ${CCWERR}
 #
 # Darwin dynamic shared lib filenames
 LIB_EXT:= .dylib