--- ./configure.ac.ORIGIN	2021-01-07 17:27:23 +0100
+++ ./configure.ac	2021-01-07 17:27:03 +0100
@@ -469,6 +469,7 @@
 TCLINCLUDE=
 TCLLIB=
 TCLPACKAGE=
+TCLLINK=
 
 AC_ARG_WITH(tclconfig, AS_HELP_STRING([--without-tcl], [Disable Tcl])
 AS_HELP_STRING([--with-tclconfig=path], [Set location of tclConfig.sh]), [with_tclconfig="$withval"], [with_tclconfig=])
@@ -580,6 +581,12 @@
 *)TCLDYNAMICLINKING="";;
 esac
 
+# AIX needs -ltcl for linking at test time
+case $host in
+*-*-aix*) TCLLINK="-ltcl -lm";;
+*)TCLLINK="";;
+esac
+
 case $host in
 *-*-darwin*)
     TCLLDSHARED='$(CC) -dynamiclib -undefined suppress -flat_namespace'
@@ -598,6 +605,7 @@
 AC_SUBST(TCLDYNAMICLINKING)
 AC_SUBST(TCLLDSHARED)
 AC_SUBST(TCLCXXSHARED)
+AC_SUBST(TCLLINK)
 
 #----------------------------------------------------------------
 # Look for Python
--- ./Examples/Makefile.in.ORIGIN	2021-01-07 17:16:11 +0100
+++ ./Examples/Makefile.in	2021-01-07 17:20:06 +0100
@@ -165,6 +165,7 @@
 TCLLDSHARED = @TCLLDSHARED@
 TCLCXXSHARED = @TCLCXXSHARED@
 TCL_SCRIPT = $(SRCDIR)$(RUNME).tcl
+TCL_LINK   = @TCLLINK@
 
 # -----------------------------------------------------------
 # Build a new version of the tclsh shell
@@ -196,7 +197,7 @@
 tcl_cpp: $(SRCDIR_SRCS)
 	$(SWIG) -tcl8 -c++ $(SWIGOPT) $(TCL_SWIGOPTS) -o $(ICXXSRCS) $(INTERFACEPATH)
 	$(CXX) -c $(CCSHARED) $(CPPFLAGS) $(CXXFLAGS) $(SRCDIR_SRCS) $(SRCDIR_CXXSRCS) $(ICXXSRCS) $(INCLUDES) $(TCL_INCLUDE)
-	$(TCLCXXSHARED) $(CXXFLAGS) $(LDFLAGS) $(OBJS) $(IOBJS) $(TCL_DLNK) $(LIBS) $(CPP_DLLIBS) -o $(LIBPREFIX)$(TARGET)$(TCL_SO)
+	$(TCLCXXSHARED) $(CXXFLAGS) $(LDFLAGS) $(OBJS) $(IOBJS) $(TCL_DLNK) $(LIBS) $(CPP_DLLIBS) -o $(LIBPREFIX)$(TARGET)$(TCL_SO) $(TCL_LINK)
 
 # -----------------------------------------------------------------
 # Run Tcl example
--- ./Examples/Makefile.in.ORIGIN	2021-01-07 17:42:34 +0100
+++ ./Examples/Makefile.in	2021-01-07 17:42:36 +0100
@@ -188,7 +188,7 @@
 tcl:  $(SRCDIR_SRCS)
 	$(SWIG) -tcl8 $(SWIGOPT) $(TCL_SWIGOPTS) -o $(ISRCS) $(INTERFACEPATH)
 	$(CC) -c $(CCSHARED) $(CPPFLAGS) $(CFLAGS) $(SRCDIR_SRCS) $(ISRCS) $(INCLUDES) $(TCL_INCLUDE)
-	$(TCLLDSHARED) $(CFLAGS) $(LDFLAGS) $(OBJS) $(IOBJS) $(TCL_DLNK) $(LIBS) -o $(LIBPREFIX)$(TARGET)$(TCL_SO)
+	$(TCLLDSHARED) $(CFLAGS) $(LDFLAGS) $(OBJS) $(IOBJS) $(TCL_DLNK) $(LIBS) -o $(LIBPREFIX)$(TARGET)$(TCL_SO) $(TCL_LINK)
 
 # -----------------------------------------------------------
 # Build a Tcl7.5 dynamic loadable module for C++