btrfs: add examples on the shutdown experimental feature

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/fs/btrfs/shutdown/Makefile b/fs/btrfs/shutdown/Makefile
new file mode 100644
index 0000000..8871afd
--- /dev/null
+++ b/fs/btrfs/shutdown/Makefile
@@ -0,0 +1,56 @@
+##
+# By default everything is silent. If you want to change this behavior, simply
+# assign V=1 when calling make.
+
+V =
+ifeq ($(strip $(V)),)
+	E = @echo
+	Q = @
+else
+	E = @\#
+	Q =
+endif
+
+##
+# Compile options. You can use CROSS_COMPILE just like on the Linux Kernel.
+
+CC       = $(CROSS_COMPILE)gcc
+LD       = $(CROSS_COMPILE)ld
+CCFLAGS  = -Werror -Wpedantic -Wall -Wextra -Wcast-qual -Winit-self \
+           -Wmissing-include-dirs -Wredundant-decls -Wshadow -Wsign-conversion \
+           -Wswitch-default -Wundef -Wunreachable-code -Wmissing-noreturn \
+           -D_FORTIFY_SOURCE=3 -fstrict-flex-arrays=3 -fsanitize=bounds-strict
+	       # NOTE: last line: special flags for the examples :)
+LDFLAGS  =
+
+
+# You can pass an optional `DEBUG` variable to manipulate the build type.
+DEBUG =
+ifeq ($(strip $(DEBUG)),)
+	CCFLAGS += -O3
+else
+	CCFLAGS += -g
+endif
+
+##
+# Paths.
+
+SRC  = $(wildcard *.c)
+EXES = $(SRC:.c=)
+
+##
+# Targets
+
+.PHONY: all
+all: clean $(EXES)
+
+.PHONY: build
+build: $(EXES)
+
+.c:
+	$(E) "	CC	" $(*F)
+	$(Q) $(CC) $(CCFLAGS) $< -o $@
+
+.PHONY: clean
+clean:
+	$(Q) rm -f $(EXES)