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-To-do list for xgawk enhancements:
-
-- In gawkapi.c - review switch statements and use of default.
-
-Low priority:
-
-- Enhance extension/fork.c waitpid to allow the caller to specify the options.
-  And add an optional array argument to wait and waitpid in which to return
-  exit status information.
-
-Possible future changes requiring (further) discussion:
-
-- Change from dlopen to using the libltdl library (i.e. lt_dlopen).
-  This may support more platforms.
-
-- Implement namespaces.  Arnold suggested the following in an email:
-  - Extend the definition of an 'identifier' to include "." as a valid character
-    although an identifier can't start with it.
-  - Extension libraries install functions and global variables with names
-    that have a "." in them:  XML.parse(), XML.name, whatever.
-  - Awk code can read/write such variables and call such functions, but they
-    cannot define such functions
-	  function XML.foo() { .. }	# error
-    or create a variable with such a name if it doesn't exist. This would
-    be a run-time error, not a parse-time error.
-  - This last rule may be too restrictive.
-  I don't want to get into fancy rules a la perl and file-scope visibility
-  etc, I'd like to keep things simple.  But how we design this is going
-  to be very important.
-
-Unlikely:
-
-- Include a sample rpm spec file in a new packaging subdirectory.
-
-- Patch lexer for @include and @load to make quotes optional.
-
-Done:
-
-- Add AWKLIBPATH with default pointing to ${libexecdir}/$PACKAGE/$VERSION
-
-- Change default shared library extension from ".so" to ".$shlibext"
-
-- Patch build infrastructure so that the current code in the
-  extension subdirectory gets built and installed into the default $AWKLIBPATH
-  location.
-
-- Implement @load
-
-- Patch ERRNO handling to create a simple API for use by extensions:
-   extern void update_ERRNO_int(int)
-   enum errno_translate { TRANSLATE, DONT_TRANSLATE };
-   extern void update_ERRNO_string(const char *string, enum errno_translate);
-   extern void unset_ERRNO(void);
-
-- Add valgrind-noleak target.
-
-- Fix minor bug in fork extension, and add wait function.
-
-- Patch filefuncs extension to read symbolic links more robustly.
-
-- Add shared library tests.
-
-- Delete extension/xreadlink.[ch]
-
-- Add a -i (--include) option.
-
-- Enable default ".awk" search in io.c:find_source().  The simple change
-  is to add this code inline in io.c:
-      #ifndef DEFAULT_FILETYPE
-      #define DEFAULT_FILETYPE ".awk"
-      #endif
-
-- The -f flag should not eliminate duplicates.
-
-- Eliminate libtool from the top-level configure.ac.  Create a separate
-  configure.ac in the extensions subdirectory, and hide all the libtool
-  stuff in there.
-
-- Running "make install" should install gawkapi.h in /usr/include.
-
-- Add time extension to the gawk distro. This defines sleep and gettimeofday.
-  Renamed existing gettimeofday to getlocaltime.
-
-- Finish implementing new interface using gawkapi.h
-   - api_get_curfunc_param not honoring requested type in node_to_awk_value
-      - should api_sym_lookup also accept a type request?
-   - must update the API do_lint value when changed by set_LINT
-   - what is the proper return value for load_ext?  It does not matter
-   unless called by the "extension" function that nobody uses.
-
-- Hide private parts of IOBUF from extensions.
-
-- Fix extension/rwarray.c.
-
-- Fix lint complaints about shared library functions being called without
-  having been defined.  For example, try:
-     gawk --lint -lordchr 'BEGIN {print chr(65)}'
-     gawk: warning: function `chr' called but never defined
-     A
-  In ext.c, make_builtin needs to call awkgram.y:func_use.  If done naively,
-  I think this would result in complaints about shared library functions
-  defined but not used.  So there should probably be an enhancement to func_use
-  and ftable to indicate if it's a shared library function.
-
-- Develop a libgawk shared library for use by extensions.  Should this
-  be hosted in a separate project?
-
-  A few existing extensions use a hash API for mapping string
-  handles to structures.  In xgawk, we had this API inside array.c, but it
-  probably belongs in a separate libgawk shared library:
-
-  typedef struct _strhash strhash;
-  extern strhash *strhash_create P((size_t min_table_size));
-  /* Find an entry in the hash table.  If it is not found, the insert_if_missing
-     argument indicates whether a new entry should be created.  The caller
-     may set the "data" field to any desired value.  If it is a new entry,
-     "data" will be initialized to NULL. */
-  extern strhash_entry *strhash_get P((strhash *, const char *s, size_t len,
-				       int insert_if_missing));
-  typedef void (*strhash_delete_func)(void *data, void *opaque,
-				      strhash *, strhash_entry *);
-  extern int strhash_delete P((strhash *, const char *s, size_t len,
-			       strhash_delete_func, void *opaque));
-  extern void strhash_destroy P((strhash *, strhash_delete_func, void *opaque));
-
-- Separate projects for major standalone extensions.  We need to set up
-  hosting for these projects:
-
-	- XML
-
-	- PostgreSQL
-
-	- GD
-
-	- MPFR.  This is probably not useful now that MPFR support has been
-	  integrated into gawk.  Are there any users who need this extension?
-
-- Review open hook implementation.
-  	* Mostly done.
-	* Still to go: Rework iop_alloc, interaction with open hooks, and
-	  skipping command line directories.
-
-- Attempting to load the same file with -f and -i (or @include) should
-  be a fatal error.
-
-- Consider adding a way to access gawk special vars read only.
-
-- Review macros (force_string etc.)