From: Teemu Ikonen <tpikonen@gmail.com>
Date: Thu, 11 Oct 2018 10:50:23 +0300
Subject: makefile-fix: Pick up CFLAGS and LDFLAGS from the environment.

---
 Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 4bfa95c..cc65588 100644
--- a/Makefile
+++ b/Makefile
@@ -668,11 +668,11 @@ endif
 CC	= gcc
 C++	= g++
 ifneq ($(CBFDEBUG),)
-CFLAGS  = -g -O0 -Wall -D_USE_XOPEN_EXTENDED -fno-strict-aliasing -DCBFDEBUG=1  $(HDF5CFLAGS)
+CFLAGS  += -g -O0 -Wall -D_USE_XOPEN_EXTENDED -fno-strict-aliasing -DCBFDEBUG=1  $(HDF5CFLAGS)
 else
-CFLAGS  = -g -O3 -Wall -D_USE_XOPEN_EXTENDED -fno-strict-aliasing  $(HDF5CFLAGS)
+CFLAGS  += -g -O3 -Wall -D_USE_XOPEN_EXTENDED -fno-strict-aliasing  $(HDF5CFLAGS)
 endif
-LDFLAGS =
+LDFLAGS +=
 F90C = gfortran
 F90FLAGS = -g -fno-range-check -fallow-invalid-boz
 F90LDFLAGS =