Move filename extensions into language_defn

This moves filename extensions from a function in symfile.c out to
each language_defn.  I think this is an improvement because it means
less digging around when writing a new language port.

2016-06-23  Tom Tromey  <tom@tromey.com>

	* ada-lang.c (ada_extensions): New array.
	(ada_language_defn): Use it.
	* c-lang.c (c_extensions): New array.
	(c_language_defn): Use it.
	(cplus_extensions): New array.
	(cplus_language_defn): Use it.
	(asm_extensions): New array.
	(asm_language_defn): Use it.
	(minimal_language_defn): Update.
	* d-lang.c (d_extensions): New array.
	(d_language_defn): Use it.
	* f-lang.c (f_extensions): New array.
	(f_language_defn): Use it.
	* go-lang.c (go_language_defn): Update.
	* jv-lang.c (java_extensions): New array.
	(java_language_defn): Use it.
	* language.c (add_language): Call add_filename_language.
	(unknown_language_defn, auto_language_defn, local_language_defn):
	Update.
	* language.h (struct language_defn) <la_filename_extensions>: New
	field.
	* m2-lang.c (m2_language_defn): Update.
	* objc-lang.c (objc_extensions): New array.
	(objc_language_defn): Use it.
	* opencl-lang.c (opencl_language_defn): Update.
	* p-lang.c (p_extensions): New array.
	(pascal_language_defn): Use it.
	* rust-lang.c (rust_extensions): New array.
	(rust_language_defn): Use it.
	* symfile.c (add_filename_language): No longer static.  Make "ext"
	const.
	(init_filename_language_table): Remove.
	(_initialize_symfile): Update.
	* symfile.h (add_filename_language): Declare.

1 files changed, 4 insertions, 55 deletions

diff --git a/gdb/symfile.c b/gdb/symfile.c
index f7f56c600e..d29e96c257 100644
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -114,12 +114,8 @@ static int simple_read_overlay_table (void);
 
 static int simple_overlay_update_1 (struct obj_section *);
 
-static void add_filename_language (char *ext, enum language lang);
-
 static void info_ext_lang_command (char *args, int from_tty);
 
-static void init_filename_language_table (void);
-
 static void symfile_find_segment_sections (struct objfile *objfile);
 
 void _initialize_symfile (void);
@@ -2719,8 +2715,10 @@ DEF_VEC_O (filename_language);
 
 static VEC (filename_language) *filename_language_table;
 
-static void
-add_filename_language (char *ext, enum language lang)
+/* See symfile.h.  */
+
+void
+add_filename_language (const char *ext, enum language lang)
 {
   filename_language entry;
 
@@ -2818,54 +2816,6 @@ info_ext_lang_command (char *args, int from_tty)
     printf_filtered ("\t%s\t- %s\n", entry->ext, language_str (entry->lang));
 }
 
-static void
-init_filename_language_table (void)
-{
-  /* Protect against repetition.  */
-  if (VEC_empty (filename_language, filename_language_table))
-    {
-      add_filename_language (".c", language_c);
-      add_filename_language (".d", language_d);
-      add_filename_language (".C", language_cplus);
-      add_filename_language (".cc", language_cplus);
-      add_filename_language (".cp", language_cplus);
-      add_filename_language (".cpp", language_cplus);
-      add_filename_language (".cxx", language_cplus);
-      add_filename_language (".c++", language_cplus);
-      add_filename_language (".java", language_java);
-      add_filename_language (".class", language_java);
-      add_filename_language (".m", language_objc);
-      add_filename_language (".f", language_fortran);
-      add_filename_language (".F", language_fortran);
-      add_filename_language (".for", language_fortran);
-      add_filename_language (".FOR", language_fortran);
-      add_filename_language (".ftn", language_fortran);
-      add_filename_language (".FTN", language_fortran);
-      add_filename_language (".fpp", language_fortran);
-      add_filename_language (".FPP", language_fortran);
-      add_filename_language (".f90", language_fortran);
-      add_filename_language (".F90", language_fortran);
-      add_filename_language (".f95", language_fortran);
-      add_filename_language (".F95", language_fortran);
-      add_filename_language (".f03", language_fortran);
-      add_filename_language (".F03", language_fortran);
-      add_filename_language (".f08", language_fortran);
-      add_filename_language (".F08", language_fortran);
-      add_filename_language (".s", language_asm);
-      add_filename_language (".sx", language_asm);
-      add_filename_language (".S", language_asm);
-      add_filename_language (".pas", language_pascal);
-      add_filename_language (".p", language_pascal);
-      add_filename_language (".pp", language_pascal);
-      add_filename_language (".adb", language_ada);
-      add_filename_language (".ads", language_ada);
-      add_filename_language (".a", language_ada);
-      add_filename_language (".ada", language_ada);
-      add_filename_language (".dg", language_ada);
-      add_filename_language (".rs", language_rust);
-    }
-}
-
 enum language
 deduce_language_from_filename (const char *filename)
 {
@@ -4018,7 +3968,6 @@ A load OFFSET may also be given."), &cmdlist);
 	   _("Read the overlay mapping state from the target."), &overlaylist);
 
   /* Filename extension to source language lookup table: */
-  init_filename_language_table ();
   add_setshow_string_noescape_cmd ("extension-language", class_files,
 				   &ext_args, _("\
 Set mapping between filename extension and source language."), _("\