btrfs-progs: build with -D_FORTIFY_SOURCE=2

Add -D_FORTIFY_SOURCE=2 to the makeflags. It has been very helpful
in finding problems.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
---
 Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index a230301..115be6b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CC=gcc
-AM_CFLAGS = -Wall -fno-strict-aliasing -D_FILE_OFFSET_BITS=64
+AM_CFLAGS = -Wall -fno-strict-aliasing -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2
 CFLAGS = -g -Werror
 objects = ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o \
          root-tree.o dir-item.o hash.o file-item.o inode-item.o \