--- heirloom-devtools-070527/mk.config.old	2007-05-27 11:56:51.000000000 -0500
+++ heirloom-devtools-070527/mk.config	2017-11-24 21:27:26.961471332 -0600
@@ -17,12 +17,12 @@
 #
 # A BSD-compatible install command.
 #
-INSTALL=/usr/ucb/install
+INSTALL=/usr/bin/install
 
 #
 # Prefix.
 #
 PREFIX=/usr/ccs
 
 #
 # Where to place binaries.
@@ -32,7 +32,7 @@
 #
 # Where to place additional binaries that aim at POSIX conformance.
 #
-SUSBIN=/usr/5bin/posix
+SUSBIN=$(PREFIX)/bin
 
 #
 # Where to place libraries.
@@ -47,7 +47,7 @@
 #
 # Binaries are stripped with this command after installation.
 #
-STRIP=strip
+STRIP=true
 
 #
 # C++ compiler.
@@ -57,8 +57,8 @@
 #
 # Compiler flags.
 #
-CFLAGS=-O
-CXXFLAGS=-O
+CFLAGS ?= -O
+CXXFLAGS ?= -O
 
 #
 # C preprocessor flags.
@@ -76,7 +76,7 @@
 #
 # Linker flags.
 #
-LDFLAGS=
+LDFLAGS ?=
 
 #
 # Additional libraries to link with.