[PATCH] pylibfdt: Fix "invalid escape sequence '\w'" in setup.py

[Tom Rini]

From: Florian Schmaus <flo at geekplace.eu>

Once u-boot's build system invokes

python3 scripts/dtc/pylibfdt/setup.py --quiet build_ext --inplace

it may fail with

scripts/dtc/pylibfdt/setup.py:40: SyntaxWarning: invalid escape sequence '\w'
  RE_KEY_VALUE = re.compile('(?P<key>\w+) *(?P<plus>[+])?= *(?P<value>.*)$')

depending on the used Python version.

Explicitly mark the regex string as raw string to avoid the warning.

Signed-off-by: Florian Schmaus <flo at geekplace.eu>
---
 scripts/dtc/pylibfdt/setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/dtc/pylibfdt/setup.py b/scripts/dtc/pylibfdt/setup.py
index 8baae08770ca..c6fe5a6a446f 100755
--- a/scripts/dtc/pylibfdt/setup.py
+++ b/scripts/dtc/pylibfdt/setup.py
@@ -37,7 +37,7 @@
     long_description = fh.read()
 
 # Decodes a Makefile assignment line into key and value (and plus for +=)
-RE_KEY_VALUE = re.compile('(?P<key>\w+) *(?P<plus>[+])?= *(?P<value>.*)$')
+RE_KEY_VALUE = re.compile(r'(?P<key>\w+) *(?P<plus>[+])?= *(?P<value>.*)$')
 
 def get_top_builddir():
     if '--top-builddir' in sys.argv: