2 files changed, 7 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index d061794..7860238 100644
--- a/Makefile
+++ b/Makefile
@@ -6,10 +6,11 @@
 SHELL=/bin/sh
 CC=gcc
 CFLAGS=-ansi -pedantic
+FLAGS= # command-line macro
 
 colorize:	colorize.c
 			perl ./version.pl > version.h
-			$(CC) $(CFLAGS) -o colorize colorize.c -DCFLAGS="$(CFLAGS)" -DHAVE_VERSION
+			$(CC) $(CFLAGS) -o colorize colorize.c -DCFLAGS="$(CFLAGS)" -DHAVE_VERSION $(FLAGS)
 
 check:
 			perl ./test.pl
diff --git a/README b/README
index 1265637..159291e 100644
--- a/README
+++ b/README
@@ -32,6 +32,11 @@ currently no make targets to install it as such.
 
 Finally, remove it through `make clean'.
 
+For the sake of completeness, colorize can be also built with
+debugging output by issuing `make FLAGS=-DDEBUG'.  The intention
+is to provide some memory allocation diagnostics (and might be
+extended in future).  Usually, a debugging build is not required.
+
 Documentation
 -------------
 See man page source file: colorize.1.