--- Makefile.am	2023-02-24 20:01:05.000000000 +0800
+++ Makefile.am	2024-07-28 22:20:05.000000000 +0800
@@ -10,7 +10,7 @@
 # default mspack_system and will fail without it -- any program with a call
 # like "mspack_create_...(NULL)" expects a default mspack_system.
 if GCC
-AM_CFLAGS +=            -Wall -Wextra -Wno-unused-parameter -Wno-unused-result
+AM_CFLAGS +=            -Wall -Wextra -Wno-unused-parameter
 endif
 AM_CPPFLAGS =           -I$(srcdir)/mspack -I$(srcdir)/test