Prereq: "3.8.13"
diff -ur --new-file /var/tmp/postfix-3.8.13/src/global/mail_version.h ./src/global/mail_version.h
--- /var/tmp/postfix-3.8.13/src/global/mail_version.h	2025-11-25 12:32:33.000000000 -0500
+++ ./src/global/mail_version.h	2025-12-05 15:29:39.000000000 -0500
@@ -20,8 +20,8 @@
   * Patches change both the patchlevel and the release date. Snapshots have no
   * patchlevel; they change the release date only.
   */
-#define MAIL_RELEASE_DATE	"20251125"
-#define MAIL_VERSION_NUMBER	"3.8.13"
+#define MAIL_RELEASE_DATE	"20251205"
+#define MAIL_VERSION_NUMBER	"3.8.14"
 
 #ifdef SNAPSHOT
 #define MAIL_VERSION_DATE	"-" MAIL_RELEASE_DATE
diff -ur --new-file /var/tmp/postfix-3.8.13/HISTORY ./HISTORY
--- /var/tmp/postfix-3.8.13/HISTORY	2025-11-25 12:33:00.000000000 -0500
+++ ./HISTORY	2025-12-05 15:27:32.000000000 -0500
@@ -27597,3 +27597,13 @@
 	Bugfix (defect introduced: Postfix 2.9, date: 20120307):
 	segfault with duplicate parameter name in "postconf -X" or
 	"postconf -#'. File: postconf/postconf_edit.c.
+
+20251205
+
+	Compatibility: recent Linux distributions have C compilers
+	with a built-in 'bool' type (size=1) that conflicts with
+	Postfix's bool (an alias for int, typically size=4). Postfix
+	3.11 adopts the built-in bool type, but that change is too
+	large for the stable releases. Instead, the command "make
+	makefiles" will figure out how to make the compiler
+	backwards-compatible. File: makedefs.
diff -ur --new-file /var/tmp/postfix-3.8.13/makedefs ./makedefs
--- /var/tmp/postfix-3.8.13/makedefs	2023-04-14 09:37:45.000000000 -0400
+++ ./makedefs	2025-12-05 15:27:32.000000000 -0500
@@ -1225,6 +1225,25 @@
 	-Wparentheses -Wstrict-prototypes -Wswitch -Wuninitialized \
 	-Wunused -Wno-missing-braces -fno-common'}
 
+# C23 introduces a built-in type 'bool' (size 1) which breaks past Postfix
+# practice where 'bool' is an alias for 'int' (typically, size 4).
+# Fortunately, -std=gnu17 works with both gcc and clang.
+cat >makedefs.test.c <<'EOF'
+/* This appears in mail_params.h */
+typedef int bool;
+EOF
+
+if eval ${CC} ${CCARGS} -c makedefs.test.c >/dev/null 2>&1
+then
+    : No further action needed.
+elif eval ${CC} -std=gnu17 ${CCARGS} -c makedefs.test.c >/dev/null 2>&1
+then
+    CCARGS="-std=gnu17 $CCARGS"
+else
+    error 'Please specify "CC=..." or "CCARGS=..." option to disable C23 bool'
+fi
+rm -f makedefs.test.[co]
+
 # Extract map type names from -DHAS_XXX compiler options.  We avoid
 # problems with tr(1) range syntax by using enumerations instead,
 # and we don't try to figure out which awk versions have tolower().