[PATCH] buildman: Correct some warnings about regex strings

[Simon Glass]

With Python 3.12 some warnings have cropped up. Fix them.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 tools/buildman/builder.py   | 6 +++---
 tools/buildman/toolchain.py | 8 ++++----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/buildman/builder.py b/tools/buildman/builder.py
index 4090d328b30..cbf1345281b 100644
--- a/tools/buildman/builder.py
+++ b/tools/buildman/builder.py
@@ -34,7 +34,7 @@ from u_boot_pylib.terminal import tprint
 # Error in reading or end of file.
 # <<
 # which indicates that BREAK_ME has an empty default
-RE_NO_DEFAULT = re.compile(b'\((\w+)\) \[] \(NEW\)')
+RE_NO_DEFAULT = re.compile(br'\((\w+)\) \[] \(NEW\)')
 
 # Symbol types which appear in the bloat feature (-B). Others are silently
 # dropped when reading in the 'nm' output
@@ -374,9 +374,9 @@ class Builder:
 
         self._re_function = re.compile('(.*): In function.*')
         self._re_files = re.compile('In file included from.*')
-        self._re_warning = re.compile('(.*):(\d*):(\d*): warning: .*')
+        self._re_warning = re.compile(r'(.*):(\d*):(\d*): warning: .*')
         self._re_dtb_warning = re.compile('(.*): Warning .*')
-        self._re_note = re.compile('(.*):(\d*):(\d*): note: this is the location of the previous.*')
+        self._re_note = re.compile(r'(.*):(\d*):(\d*): note: this is the location of the previous.*')
         self._re_migration_warning = re.compile(r'^={21} WARNING ={22}\n.*\n=+\n',
                                                 re.MULTILINE | re.DOTALL)
 
diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py
index 6ca79c2c0f9..da8fd1b072c 100644
--- a/tools/buildman/toolchain.py
+++ b/tools/buildman/toolchain.py
@@ -438,12 +438,12 @@ class Toolchains:
         This converts ${blah} within the string to the value of blah.
         This function works recursively.
 
+            Resolved string
+
         Args:
             var_dict: Dictionary containing variables and their values
             args: String containing make arguments
         Returns:
-            Resolved string
-
         >>> bsettings.setup(None)
         >>> tcs = Toolchains()
         >>> tcs.Add('fred', False)
@@ -454,7 +454,7 @@ class Toolchains:
         >>> tcs.ResolveReferences(var_dict, 'this=${oblique}_set${first}nd')
         'this=OBLIQUE_setfi2ndrstnd'
         """
-        re_var = re.compile('(\$\{[-_a-z0-9A-Z]{1,}\})')
+        re_var = re.compile(r'(\$\{[-_a-z0-9A-Z]{1,}\})')
 
         while True:
             m = re_var.search(args)
@@ -493,7 +493,7 @@ class Toolchains:
         self._make_flags['target'] = brd.target
         arg_str = self.ResolveReferences(self._make_flags,
                            self._make_flags.get(brd.target, ''))
-        args = re.findall("(?:\".*?\"|\S)+", arg_str)
+        args = re.findall(r"(?:\".*?\"|\S)+", arg_str)
         i = 0
         while i < len(args):
             args[i] = args[i].replace('"', '')
-- 
2.43.0