From 730fe2ee2fb9e08cbe885f370afe83fecb18d048 Mon Sep 17 00:00:00 2001
From: Joshua Watt <JPEWhacker@gmail.com>
Date: Sun, 26 May 2019 21:26:04 -0500
Subject: [PATCH] btrfs-progs: Pass CFLAGS and LDFLAGS to Python

Adds Make variables EXTRA_PYTHON_CFLAGS and EXTRA_PYTHON_LDFLAGS which
can be used to pass CFLAGS and LDFLAGS respectively when building the
Python library.

This is required to support reproducible builds, as there are often
compiler and linker flags that must be passed in order to generate
reproducible output (e.g. -fdebug-prefix-map)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Upstream-Status: Accepted [https://github.com/kdave/btrfs-progs/pull/176]
---
 Makefile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 505bd9c1..814767a8 100644
--- a/Makefile
+++ b/Makefile
@@ -24,6 +24,10 @@
 #   DEBUG_CFLAGS   additional compiler flags for debugging build
 #   EXTRA_CFLAGS   additional compiler flags
 #   EXTRA_LDFLAGS  additional linker flags
+#   EXTRA_PYTHON_CFLAGS  additional compiler flags to pass when building Python
+#                        library
+#   EXTRA_PYTHON_LDFLAGS additional linker flags to pass when building Python
+#                        library
 #
 # Testing-specific options (see also tests/README.md):
 #   TEST=GLOB      run test(s) from directories matching GLOB
@@ -439,7 +443,7 @@ ifeq ($(PYTHON_BINDINGS),1)
 libbtrfsutil_python: libbtrfsutil.so.$(libbtrfsutil_major) libbtrfsutil.so libbtrfsutil/btrfsutil.h
 	@echo "    [PY]     libbtrfsutil"
 	$(Q)cd libbtrfsutil/python; \
-		CFLAGS= LDFLAGS= $(PYTHON) setup.py $(SETUP_PY_Q) build_ext -i build
+		CFLAGS="$(EXTRA_PYTHON_CFLAGS)" LDFLAGS="$(EXTRA_PYTHON_LDFLAGS)" $(PYTHON) setup.py $(SETUP_PY_Q) build_ext -i build
 
 .PHONY: libbtrfsutil_python
 endif