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.in
+++ b/src/bzip2/Makefile.in
@@ -5,7 +5,7 @@ all: libH5Zbz2.so
 
 libH5Zbz2.so: @BUILD_BZ2@
 	${CC} ${PKG_CFLAGS} ${PKG_CPICFLAGS} -shared H5Zbzip2.c $(PKG_CPPFLAGS) \
-	${BZ2_INCLUDE} ${BZ2_LIB} ${PKG_LDFLAGS} -o libH5Zbz2.so
+	${BZ2_INCLUDE} ${BZ2_LIB} ${PKG_LDFLAGS} -o libH5Zbz2.so $(LDFLAGS)
 
 bzip2-1.0.8/libbz2.a:
 	$(MAKE) -C bzip2-1.0.8
