-echo "OS=$OS" > $CONFFILE
-echo "STG_TIME=yes" >> $CONFFILE
-echo "DEBUG=$DEBUG" >> $CONFFILE
-echo "DIR_BUILD=$BUILD_DIR" >> $CONFFILE
-echo "DIR_LIB=\$(DIR_BUILD)/../../lib" >> $CONFFILE
-echo "DIR_LIBSRC=\$(DIR_BUILD)/../../stglibs" >> $CONFFILE
-echo "DIR_INCLUDE=\$(DIR_BUILD)/../../include" >> $CONFFILE
-echo "ARCH=$ARCH" >> $CONFFILE
-echo "DEFS=$DEFS" >> $CONFFILE
-echo -n "STG_LIBS=" >> $CONFFILE
+printf "Checking for iconv 2nd argument... "
+printf "#include <iconv.h>\nint main(){ const char** src = 0; iconv(0, src, 0, 0, 0); }\n" > build_check.c
+$CC $CFLAGS $LDFLAGS -Werror build_check.c $LIBICONV -o fake > /dev/null 2> /dev/null
+if [ $? != 0 ]
+then
+ printf "non-const\n"
+else
+ DEFS="$DEFS -DCONST_ICONV"
+ printf "const\n"
+fi
+rm -f fake
+
+printf "OS=$OS\n" > $CONFFILE
+printf "STG_TIME=yes\n" >> $CONFFILE
+printf "DEBUG=$DEBUG\n" >> $CONFFILE
+printf "DIR_BUILD=$BUILD_DIR\n" >> $CONFFILE
+printf "DIR_LIB=\$(DIR_BUILD)/../../lib\n" >> $CONFFILE
+printf "DIR_LIBSRC=\$(DIR_BUILD)/../../stglibs\n" >> $CONFFILE
+printf "DIR_INCLUDE=\$(DIR_BUILD)/../../include\n" >> $CONFFILE
+printf "ARCH=$ARCH\n" >> $CONFFILE
+printf "DEFS=$DEFS\n" >> $CONFFILE
+printf "STG_LIBS=" >> $CONFFILE