diff --git a/src/port/pg_cpu_x86.c b/src/port/pg_cpu_x86.c
index 150b4a1d574..f22167da9af 100644
--- a/src/port/pg_cpu_x86.c
+++ b/src/port/pg_cpu_x86.c
@@ -263,5 +263,10 @@ x86_hypervisor_tsc_frequency_khz(void)
 	return 0;
 }
 
+#else							/* defined(USE_SSE2) || defined(__i386__) */
 
-#endif							/* defined(USE_SSE2) || defined(__i386__) */
+/* prevent linker complaints about empty module */
+extern int	pg_cpu_x86_dummy_variable;
+int			pg_cpu_x86_dummy_variable = 0;
+
+#endif							/* ! (USE_SSE2 || __i386__) */
diff --git a/src/port/pg_popcount_aarch64.c b/src/port/pg_popcount_aarch64.c
index 3969a42523c..fc249bf8766 100644
--- a/src/port/pg_popcount_aarch64.c
+++ b/src/port/pg_popcount_aarch64.c
@@ -463,4 +463,10 @@ pg_popcount_masked_neon(const char *buf, int bytes, uint8 mask)
 	return popcnt;
 }
 
-#endif							/* USE_NEON */
+#else							/* USE_NEON */
+
+/* prevent linker complaints about empty module */
+extern int	pg_popcount_aarch64_dummy_variable;
+int			pg_popcount_aarch64_dummy_variable = 0;
+
+#endif							/* ! USE_NEON */
diff --git a/src/port/pg_popcount_x86.c b/src/port/pg_popcount_x86.c
index 91579e6b569..6df76c77c41 100644
--- a/src/port/pg_popcount_x86.c
+++ b/src/port/pg_popcount_x86.c
@@ -301,4 +301,10 @@ pg_popcount_masked_sse42(const char *buf, int bytes, uint8 mask)
 	return popcnt;
 }
 
-#endif							/* HAVE_X86_64_POPCNTQ */
+#else							/* HAVE_X86_64_POPCNTQ */
+
+/* prevent linker complaints about empty module */
+extern int	pg_popcount_x86_dummy_variable;
+int			pg_popcount_x86_dummy_variable = 0;
+
+#endif							/* ! HAVE_X86_64_POPCNTQ */