--- ./src/backend/Makefile_orig	2025-10-23 00:11:08.895291246 -0500
+++ ./src/backend/Makefile	2025-10-23 00:13:12.578601588 -0500
@@ -63,12 +63,14 @@
 
 ifneq ($(PORTNAME), cygwin)
 ifneq ($(PORTNAME), win32)
+ifneq ($(PORTNAME), aix)
 
 postgres: $(OBJS)
 	$(CC) $(CFLAGS) $(call expand_subsys,$^) $(LDFLAGS) $(LIBS) -o $@
 
 endif
 endif
+endif
 
 ifeq ($(PORTNAME), cygwin)
 
@@ -95,6 +97,24 @@
 
 endif # win32
 
+ifeq ($(PORTNAME), aix)
+
+postgres: $(POSTGRES_IMP)
+	$(CC) $(CFLAGS) $(call expand_subsys,$(OBJS)) $(LDFLAGS) -Wl,-bE:$(top_builddir)/src/backend/$(POSTGRES_IMP) $(LIBS) -Wl,-brtllib -o $@
+
+# Linking to a single .o with -r is a lot faster than building a .a or passing
+# all objects to MKLDEXPORT.
+#
+# It looks alluring to use $(CC) -r instead of ld -r, but that doesn't
+# trivially work with gcc, due to gcc specific static libraries linked in with
+# -r.
+$(POSTGRES_IMP): $(OBJS)
+	ld -r -o SUBSYS.o $(call expand_subsys,$^)
+	$(MKLDEXPORT) SUBSYS.o . > $@
+	@rm -f SUBSYS.o
+
+endif # aix
+
 $(top_builddir)/src/port/libpgport_srv.a: | submake-libpgport