---- LibRaw-0.18.1/configure.ac.orig 2017-02-12 09:07:54.000000000 +0100
-+++ LibRaw-0.18.1/configure.ac 2017-02-25 11:11:23.817486333 +0100
-@@ -84,7 +84,7 @@
- fi
-
-
--
-+PACKAGE_REQUIRES=
- # check if we want LCMS support
- AC_ARG_ENABLE([lcms],
- [ --enable-lcms Enable LCMS support],
-@@ -98,18 +98,33 @@
- PKG_CHECK_MODULES([LCMS2],[lcms2],[
- CPPFLAGS="$CPPFLAGS $LCMS2_CFLAGS -DUSE_LCMS2"
- LIBS="$LIBS $LCMS2_LIBS"
-- AC_SUBST([PACKAGE_REQUIRES],[lcms2])
-+ PACKAGE_REQUIRES="lcms2"
- ],[
- PKG_CHECK_MODULES([LCMS],[lcms],[
- CPPFLAGS="$CPPFLAGS $LCMS_CFLAGS -DUSE_LCMS"
- LIBS="$LIBS $LCMS_LIBS"
-- AC_SUBST([PACKAGE_REQUIRES],[lcms])
-+ PACKAGE_REQUIRES="lcms"
- ],[
- AC_MSG_WARN([LCMS support cannot be enabled])
- ])
- ])
- fi
-
-+AC_ARG_ENABLE([zlib],
-+ [ --enable-zlib Enable ZLIB for deflated DNG support])
-+
-+if test x$enable_zlib = xyes; then
-+ PKG_CHECK_MODULES([ZLIB],[zlib],[
-+ CPPFLAGS="$CPPFLAGS $ZLIB_CFLAGS -DUSE_ZLIB"
-+ LIBS="$LIBS $ZLIB_LIBS"
-+ PACKAGE_REQUIRES="$PACKAGE_REQUIRES zlib"
-+ ],[
-+ AC_MSG_ERROR([ZLIB support cannot be enabled])
-+ ])
-+fi
-+
-+AC_SUBST([PACKAGE_REQUIRES])
-+
- # check if we want build examples
- AC_ARG_ENABLE([examples],
- [ --enable-examples Enable building of examples],