From: Thomas Nagy <tnagy@waf.io>
Date: Tue, 7 Oct 2025 09:01:31 +0200
Subject: Conceal imp warnings in Python3

Origin: vendor, https://gitlab.com/ita1024/waf/-/commit/d2060dfd8af4edb5824153ff24e207b39ecd67a2
Bug: https://github.com/aubio/aubio/issues/394
Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1061736
Bug-Ubuntu: https://bugs.launchpad.net/debian/+source/aubio/+bug/2051990
Last-Update: 2024-02-02

Workaround removal of imp module in Python 3.12

IOhannes m zmölnig: also work around some warnings like
> SyntaxWarning: invalid escape sequence '\s'

due to non-raw strings.

---
 waflib/Context.py      | 10 +++++++++-
 waflib/Tools/python.py |  2 +-
 2 files changed, 10 insertions(+), 2 deletions(-)

--- aubio.orig/waflib/Context.py
+++ aubio/waflib/Context.py
@@ -2,9 +2,17 @@
 # encoding: utf-8
 # WARNING! Do not edit! https://waf.io/book/index.html#_obtaining_the_waf_file
 
-import os,re,imp,sys
+import os,re,sys
 from waflib import Utils,Errors,Logs
 import waflib.Node
+
+if sys.hexversion > 0x3040000:
+	import types
+	class imp(object):
+		new_module = lambda x: types.ModuleType(x)
+else:
+	import imp
+
 HEXVERSION=0x2000e00
 WAFVERSION="2.0.14"
 WAFREVISION="907519cab9c1c8c7e4f7d4e468ed6200b9250d58"
--- aubio.orig/waflib/Tools/python.py
+++ aubio/waflib/Tools/python.py
@@ -399,7 +399,7 @@
 	v.PYC=getattr(Options.options,'pyc',1)
 	v.PYO=getattr(Options.options,'pyo',1)
 	try:
-		v.PYTAG=conf.cmd_and_log(conf.env.PYTHON+['-c',"import imp;print(imp.get_tag())"]).strip()
+		v.PYTAG = conf.cmd_and_log(conf.env.PYTHON + ['-c', "import sys\ntry:\n print(sys.implementation.cache_tag)\nexcept AttributeError:\n import imp\n print(imp.get_tag())\n"]).strip()
 	except Errors.WafError:
 		pass
 def options(opt):
--- aubio.orig/waflib/ConfigSet.py
+++ aubio/waflib/ConfigSet.py
@@ -4,7 +4,7 @@
 
 import copy,re,os
 from waflib import Logs,Utils
-re_imp=re.compile('^(#)*?([^#=]*?)\ =\ (.*?)$',re.M)
+re_imp=re.compile(r'^(#)*?([^#=]*?)\ =\ (.*?)$',re.M)
 class ConfigSet(object):
 	__slots__=('table','parent')
 	def __init__(self,filename=None):
--- aubio.orig/waflib/Task.py
+++ aubio/waflib/Task.py
@@ -567,7 +567,7 @@
 	dc={}
 	exec(c,dc)
 	return dc['f']
-re_cond=re.compile('(?P<var>\w+)|(?P<or>\|)|(?P<and>&)')
+re_cond=re.compile(r'(?P<var>\w+)|(?P<or>\|)|(?P<and>&)')
 re_novar=re.compile(r'^(SRC|TGT)\W+.*?$')
 reg_act=re.compile(r'(?P<backslash>\\)|(?P<dollar>\$\$)|(?P<subst>\$\{(?P<var>\w+)(?P<code>.*?)\})',re.M)
 def compile_fun_shell(line):
--- aubio.orig/waflib/TaskGen.py
+++ aubio/waflib/TaskGen.py
@@ -351,7 +351,7 @@
 			for y in self.tasks:
 				y.set_run_after(x)
 	self.bld.prev=self
-re_m4=re.compile('@(\w+)@',re.M)
+re_m4=re.compile(r'@(\w+)@',re.M)
 class subst_pc(Task.Task):
 	def force_permissions(self):
 		if getattr(self.generator,'chmod',None):
--- aubio.orig/waflib/Tools/c_preproc.py
+++ aubio/waflib/Tools/c_preproc.py
@@ -18,9 +18,9 @@
 strict_quotes=0
 g_optrans={'not':'!','not_eq':'!','and':'&&','and_eq':'&=','or':'||','or_eq':'|=','xor':'^','xor_eq':'^=','bitand':'&','bitor':'|','compl':'~',}
 re_lines=re.compile('^[ \t]*(?:#|%:)[ \t]*(ifdef|ifndef|if|else|elif|endif|include|import|define|undef|pragma)[ \t]*(.*)\r*$',re.IGNORECASE|re.MULTILINE)
-re_mac=re.compile("^[a-zA-Z_]\w*")
+re_mac=re.compile(r"^[a-zA-Z_]\w*")
 re_fun=re.compile('^[a-zA-Z_][a-zA-Z0-9_]*[(]')
-re_pragma_once=re.compile('^\s*once\s*',re.IGNORECASE)
+re_pragma_once=re.compile(r'^\s*once\s*',re.IGNORECASE)
 re_nl=re.compile('\\\\\r*\n',re.MULTILINE)
 re_cpp=re.compile(r'//.*?$|/\*.*?\*/|\'(?:\\.|[^\\\'])*\'|"(?:\\.|[^\\"])*"',re.DOTALL|re.MULTILINE)
 trig_def=[('??'+a,b)for a,b in zip("=-/!'()<>",r'#~\|^[]{}')]
@@ -391,7 +391,7 @@
 			return(v,[[],t[1:]])
 		else:
 			return(v,[[],[('T','')]])
-re_include=re.compile('^\s*(<(?:.*)>|"(?:.*)")')
+re_include=re.compile(r'^\s*(<(?:.*)>|"(?:.*)")')
 def extract_include(txt,defs):
 	m=re_include.search(txt)
 	if m:
--- aubio.orig/waflib/Utils.py
+++ aubio/waflib/Utils.py
@@ -440,7 +440,7 @@
 		return s
 	if s=='cli'and os.name=='nt':
 		return'win32'
-	return re.split('\d+$',s)[0]
+	return re.split(r'\d+$',s)[0]
 def nada(*k,**kw):
 	pass
 class Timer(object):
--- aubio.orig/waflib/ansiterm.py
+++ aubio/waflib/ansiterm.py
@@ -175,7 +175,7 @@
 			self._csinfo.bVisible=0
 			windll.kernel32.SetConsoleCursorInfo(self.hconsole,byref(self._csinfo))
 		ansi_command_table={'A':move_up,'B':move_down,'C':move_right,'D':move_left,'E':next_line,'F':prev_line,'G':set_column,'H':set_cursor,'f':set_cursor,'J':clear_screen,'K':clear_line,'h':show_cursor,'l':hide_cursor,'m':set_color,'s':push_cursor,'u':pop_cursor,}
-		ansi_tokens=re.compile('(?:\x1b\[([0-9?;]*)([a-zA-Z])|([^\x1b]+))')
+		ansi_tokens=re.compile(r'(?:\x1b\[([0-9?;]*)([a-zA-Z])|([^\x1b]+))')
 		def write(self,text):
 			try:
 				wlock.acquire()