diff -Nurd chmlib-0.40.orig/src/Makefile.in chmlib-0.40/src/Makefile.in
--- chmlib-0.40.orig/src/Makefile.in	2009-05-23 11:12:23.000000000 -0400
+++ chmlib-0.40/src/Makefile.in	2024-01-20 02:24:41.000000000 -0500
@@ -300,7 +300,7 @@
 	  rm -f "$${dir}/so_locations"; \
 	done
 libchm.la: $(libchm_la_OBJECTS) $(libchm_la_DEPENDENCIES) 
-	$(LINK) -rpath $(libdir) $(libchm_la_OBJECTS) $(libchm_la_LIBADD) $(LIBS)
+	$(LINK) -rpath $(libdir) $(libchm_la_OBJECTS) $(libchm_la_LIBADD) $(LIBS) -no-undefined
 install-binPROGRAMS: $(bin_PROGRAMS)
 	@$(NORMAL_INSTALL)
 	test -z "$(bindir)" || $(MKDIR_P) "$(DESTDIR)$(bindir)"
diff -Nurd chmlib-0.40.orig/src/chm_lib.c chmlib-0.40/src/chm_lib.c
--- chmlib-0.40.orig/src/chm_lib.c	2009-05-23 10:43:31.000000000 -0400
+++ chmlib-0.40/src/chm_lib.c	2024-01-20 02:25:05.000000000 -0500
@@ -181,9 +181,6 @@
 
 /* GCC */
 #ifdef __GNUC__
-#define memcmp __builtin_memcmp
-#define memcpy __builtin_memcpy
-#define strlen __builtin_strlen
 
 #elif defined(WIN32)
 static int ffs(unsigned int val)
diff -Nurd chmlib-0.40.orig/src/lzx.c chmlib-0.40/src/lzx.c
--- chmlib-0.40.orig/src/lzx.c	2009-05-23 10:43:31.000000000 -0400
+++ chmlib-0.40/src/lzx.c	2024-01-20 02:25:21.000000000 -0500
@@ -34,9 +34,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-#ifdef __GNUC__
-#define memcpy __builtin_memcpy
-#endif
 
 /* sized types */
 typedef unsigned char  UBYTE; /* 8 bits exactly    */