make the API for indexing in the parser and the linearizer public since it will be needed in the Haskell binding

src/runtime/c/pgf/data.h

@@ -351,4 +351,16 @@ struct PgfCCat {
 	GuFinalizer fin[0];
 };
 
+PGF_API_DECL void
+pgf_parser_index(PgfConcr* concr, 
+                 PgfCCat* ccat, PgfProduction prod,
+                 bool is_lexical,
+                 GuPool *pool);
+
+PGF_API_DECL void
+pgf_lzr_index(PgfConcr* concr, 
+              PgfCCat* ccat, PgfProduction prod,
+              bool is_lexical,
+              GuPool *pool);
+
 #endif

src/runtime/c/pgf/linearizer.c

@@ -30,7 +30,7 @@ pgf_lzr_add_overl_entry(PgfCncOverloadMap* overl_table,
 	gu_buf_push(entries, void*, entry);
 }
 
-PGF_INTERNAL void
+PGF_API void
 pgf_lzr_index(PgfConcr* concr, 
               PgfCCat* ccat, PgfProduction prod,
               bool is_lexical,

src/runtime/c/pgf/parser.c

@@ -2504,7 +2504,7 @@ pgf_lookup_word_prefix(PgfConcr *concr, GuString prefix,
 	return &state->en;
 }
 
-PGF_INTERNAL void
+PGF_API void
 pgf_parser_index(PgfConcr* concr, 
                  PgfCCat* ccat, PgfProduction prod,
                  bool is_lexical,

src/runtime/c/pgf/reader.c

@@ -936,18 +936,6 @@ pgf_read_pargs(PgfReader* rdr, PgfConcr* concr)
 	return pargs;
 }
 
-extern void
-pgf_parser_index(PgfConcr* concr, 
-                 PgfCCat* ccat, PgfProduction prod,
-                 bool is_lexical,
-                 GuPool *pool);
-
-extern void
-pgf_lzr_index(PgfConcr* concr, 
-              PgfCCat* ccat, PgfProduction prod,
-              bool is_lexical,
-              GuPool *pool);
-
 static bool
 pgf_production_is_lexical(PgfReader* rdr, PgfProductionApply *papp)
 {