Author: Daniel Baumann <daniel.baumann@progress-linux.org>
Description: Avoid overwriting build-environment.

diff -Naurp lunzip.orig/configure lunzip/configure
--- lunzip.orig/configure
+++ lunzip/configure
@@ -21,9 +21,9 @@ datarootdir='$(prefix)/share'
 infodir='$(datarootdir)/info'
 mandir='$(datarootdir)/man'
 CC=gcc
-CPPFLAGS=
-CFLAGS='-Wall -W -O2'
-LDFLAGS=
+#CPPFLAGS=
+#CFLAGS='-Wall -W -O2'
+#LDFLAGS=
 
 # checking whether we are using GNU C.
 /bin/sh -c "${CC} --version" > /dev/null 2>&1 ||