allow cross-compiling of libfec

init_rs_char is used both by libfec and during build process to generate
some items. we need to build it both ways so we can use it natively and
by cross-compiling target

init_rs_char_local.c

@@ -0,0 +1,35 @@
+/* Initialize a RS codec
+ *
+ * Copyright 2002 Phil Karn, KA9Q
+ * May be used under the terms of the GNU Lesser General Public License (LGPL)
+ */
+#include <stdlib.h>
+
+#include "char.h"
+#include "rs-common.h"
+
+void free_rs_char(void *p){
+  struct rs *rs = (struct rs *)p;
+
+  free(rs->alpha_to);
+  free(rs->index_of);
+  free(rs->genpoly);
+  free(rs);
+}
+
+/* Initialize a Reed-Solomon codec
+ * symsize = symbol size, bits
+ * gfpoly = Field generator polynomial coefficients
+ * fcr = first root of RS code generator polynomial, index form
+ * prim = primitive element to generate polynomial roots
+ * nroots = RS code generator polynomial degree (number of roots)
+ * pad = padding bytes at front of shortened block
+ */
+void *init_rs_char(int symsize,int gfpoly,int fcr,int prim,
+	int nroots,int pad){
+  struct rs *rs;
+
+#include "init_rs.h"
+
+  return rs;
+}

makefile.in

@@ -145,14 +145,23 @@ ccsds_tab.o: ccsds_tab.c
 ccsds_tab.c: gen_ccsds
 	./gen_ccsds > ccsds_tab.c
 
-gen_ccsds: gen_ccsds.o init_rs_char.o
+gen_ccsds: gen_ccsds.o init_rs_char_local.o
 	gcc -o $@ $^
 
 gen_ccsds.o: gen_ccsds.c
 	gcc  $(CFLAGS) -c -o $@ $<
 
+init_rs_char_local.o: init_rs_char_local.c
+	gcc $(CFLAGS) -c -o $@ $<
+
 ccsds_tal.o: ccsds_tal.c
 
+gen_ccsds_tal: gen_ccsds_tal.o
+	gcc -o $@ $^
+
+gen_ccsds_tal.o: gen_ccsds_tal.c
+	gcc $(CFLAGS) -c -o $@ $<
+
 ccsds_tal.c: gen_ccsds_tal
 	./gen_ccsds_tal > ccsds_tal.c