--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/check-c-linkage-decls.py	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+
+import sys, os
+
+srcdir = os.getenv ('srcdir', os.path.dirname (__file__))
+base_srcdir = os.getenv ('base_srcdir', srcdir)
+
+os.chdir (srcdir)
+
+def removeprefix(s):
+	abs_path = os.path.join(base_srcdir, s)
+	return os.path.relpath(abs_path, srcdir)
+
+
+HBHEADERS = [os.path.basename (x) for x in os.getenv ('HBHEADERS', '').split ()] or \
+	[x for x in os.listdir ('.') if x.startswith ('hb') and x.endswith ('.h')]
+HBSOURCES = [
+    removeprefix(x) for x in os.getenv ('HBSOURCES', '').split ()
+] or [
+    x for x in os.listdir ('.') if x.startswith ('hb') and x.endswith (('.cc', '.hh'))
+]
+stat = 0
+
+for x in HBHEADERS:
+	with open (x, 'r', encoding='utf-8') as f: content = f.read ()
+	if ('HB_BEGIN_DECLS' not in content) or ('HB_END_DECLS' not in content):
+		print ('Ouch, file %s does not have HB_BEGIN_DECLS / HB_END_DECLS, but it should' % x)
+		stat = 1
+
+for x in HBSOURCES:
+	with open (x, 'r', encoding='utf-8') as f: content = f.read ()
+	if ('HB_BEGIN_DECLS' in content) or ('HB_END_DECLS' in content):
+		print ('Ouch, file %s has HB_BEGIN_DECLS / HB_END_DECLS, but it shouldn\'t' % x)
+		stat = 1
+
+sys.exit (stat)