From: Michael R. Crusoe <crusoe@debian.org>
Subject: Include user/packager provided CFLAGS, CPPFLAGS, and LDFLAGS
Forwarded: https://github.com/grimbough/rhdf5filters/pull/4
--- a/src/bzip2/Makefile
+++ b/src/bzip2/Makefile
@@ -3,7 +3,7 @@
 
 libH5Zbz2.so:
 	${CC} ${PKG_CFLAGS} ${PKG_CPICFLAGS} -shared H5Zbzip2.c $(PKG_CPPFLAGS) \
-	-lbz2 ${PKG_LDFLAGS} -o libH5Zbz2.so
+	-lbz2 ${PKG_LDFLAGS} -o libH5Zbz2.so $(LDFLAGS)
 
 bzip2-1.0.8/libbz2.a:
 	$(MAKE) -C bzip2-1.0.8
