Removed dbm from ruby repo

4 files changed, 0 insertions, 1631 deletions

diff --git a/ext/dbm/dbm.c b/ext/dbm/dbm.c
deleted file mode 100644
index de7536651c..0000000000
--- a/ext/dbm/dbm.c
+++ /dev/null
@@ -1,1156 +0,0 @@
-/************************************************
-
-  dbm.c -
-
-  $Author$
-  created at: Mon Jan 24 15:59:52 JST 1994
-
-  Copyright (C) 1995-2001 Yukihiro Matsumoto
-
-************************************************/
-
-#include "ruby.h"
-
-#ifdef HAVE_CDEFS_H
-# include <cdefs.h>
-#endif
-#ifdef HAVE_SYS_CDEFS_H
-# include <sys/cdefs.h>
-#endif
-#include DBM_HDR
-#include <fcntl.h>
-#include <errno.h>
-
-#define DSIZE_TYPE TYPEOF_DATUM_DSIZE
-#if SIZEOF_DATUM_DSIZE > SIZEOF_INT
-# define RSTRING_DSIZE(s) RSTRING_LEN(s)
-# define TOO_LONG(n) ((void)(n),0)
-#else
-# define RSTRING_DSIZE(s) RSTRING_LENINT(s)
-# define TOO_LONG(n) ((long)(+(DSIZE_TYPE)(n)) != (n))
-#endif
-
-static VALUE rb_cDBM, rb_eDBMError;
-
-#define RUBY_DBM_RW_BIT 0x20000000
-
-struct dbmdata {
-    long di_size;
-    DBM *di_dbm;
-};
-
-NORETURN(static void closed_dbm(void));
-
-static void
-closed_dbm(void)
-{
-    rb_raise(rb_eDBMError, "closed DBM file");
-}
-
-#define GetDBM(obj, dbmp) do {\
-    TypedData_Get_Struct((obj), struct dbmdata, &dbm_type, (dbmp));\
-    if ((dbmp)->di_dbm == 0) closed_dbm();\
-} while (0)
-
-#define GetDBM2(obj, dbmp, dbm) do {\
-    GetDBM((obj), (dbmp));\
-    (dbm) = (dbmp)->di_dbm;\
-} while (0)
-
-static void
-free_dbm(void *ptr)
-{
-    struct dbmdata *dbmp = ptr;
-    if (dbmp->di_dbm)
-	dbm_close(dbmp->di_dbm);
-    xfree(dbmp);
-}
-
-static size_t
-memsize_dbm(const void *ptr)
-{
-    const struct dbmdata *dbmp = ptr;
-    size_t size = sizeof(*dbmp);
-    if (dbmp->di_dbm)
-	size += DBM_SIZEOF_DBM;
-    return size;
-}
-
-static const rb_data_type_t dbm_type = {
-    "dbm",
-    {0, free_dbm, memsize_dbm,},
-    0, 0,
-    RUBY_TYPED_FREE_IMMEDIATELY,
-};
-
-/*
- * call-seq:
- *   dbm.close
- *
- * Closes the database.
- */
-static VALUE
-fdbm_close(VALUE obj)
-{
-    struct dbmdata *dbmp;
-
-    GetDBM(obj, dbmp);
-    dbm_close(dbmp->di_dbm);
-    dbmp->di_dbm = 0;
-
-    return Qnil;
-}
-
-/*
- * call-seq:
- *   dbm.closed? -> true or false
- *
- * Returns true if the database is closed, false otherwise.
- */
-static VALUE
-fdbm_closed(VALUE obj)
-{
-    struct dbmdata *dbmp;
-
-    TypedData_Get_Struct(obj, struct dbmdata, &dbm_type, dbmp);
-    if (dbmp->di_dbm == 0)
-	return Qtrue;
-
-    return Qfalse;
-}
-
-static VALUE
-fdbm_alloc(VALUE klass)
-{
-    struct dbmdata *dbmp;
-
-    return TypedData_Make_Struct(klass, struct dbmdata, &dbm_type, dbmp);
-}
-
-/*
- * call-seq:
- *   DBM.new(filename[, mode[, flags]]) -> dbm
- *
- * Open a dbm database with the specified name, which can include a directory
- * path. Any file extensions needed will be supplied automatically by the dbm
- * library. For example, Berkeley DB appends '.db', and GNU gdbm uses two
- * physical files with extensions '.dir' and '.pag'.
- *
- * The mode should be an integer, as for Unix chmod.
- *
- * Flags should be one of READER, WRITER, WRCREAT or NEWDB.
- */
-static VALUE
-fdbm_initialize(int argc, VALUE *argv, VALUE obj)
-{
-    VALUE file, vmode, vflags;
-    DBM *dbm;
-    struct dbmdata *dbmp;
-    int mode, flags = 0;
-
-    TypedData_Get_Struct(obj, struct dbmdata, &dbm_type, dbmp);
-    if (rb_scan_args(argc, argv, "12", &file, &vmode, &vflags) == 1) {
-	mode = 0666;		/* default value */
-    }
-    else if (NIL_P(vmode)) {
-	mode = -1;		/* return nil if DB not exist */
-    }
-    else {
-	mode = NUM2INT(vmode);
-    }
-
-    if (!NIL_P(vflags))
-        flags = NUM2INT(vflags);
-
-    FilePathValue(file);
-
-    /*
-     * Note:
-     * gdbm 1.10 works with O_CLOEXEC.  gdbm 1.9.1 silently ignore it.
-     */
-#ifndef O_CLOEXEC
-#   define O_CLOEXEC 0
-#endif
-
-    if (flags & RUBY_DBM_RW_BIT) {
-        flags &= ~RUBY_DBM_RW_BIT;
-        dbm = dbm_open(RSTRING_PTR(file), flags|O_CLOEXEC, mode);
-    }
-    else {
-        dbm = 0;
-        if (mode >= 0) {
-            dbm = dbm_open(RSTRING_PTR(file), O_RDWR|O_CREAT|O_CLOEXEC, mode);
-        }
-        if (!dbm) {
-            dbm = dbm_open(RSTRING_PTR(file), O_RDWR|O_CLOEXEC, 0);
-        }
-        if (!dbm) {
-            dbm = dbm_open(RSTRING_PTR(file), O_RDONLY|O_CLOEXEC, 0);
-        }
-    }
-
-    if (dbm) {
-	/*
-	 * History of dbm_pagfno() and dbm_dirfno() in ndbm and its compatibles.
-	 * (dbm_pagfno() and dbm_dirfno() is not standardized.)
-	 *
-	 * 1986: 4.3BSD provides ndbm.
-	 *       It provides dbm_pagfno() and dbm_dirfno() as macros.
-	 * 1991: gdbm-1.5 provides them as functions.
-	 *       They returns a same descriptor.
-	 *       (Earlier releases may have the functions too.)
-	 * 1991: Net/2 provides Berkeley DB.
-	 *       It doesn't provide dbm_pagfno() and dbm_dirfno().
-	 * 1992: 4.4BSD Alpha provides Berkeley DB with dbm_dirfno() as a function.
-	 *       dbm_pagfno() is a macro as DBM_PAGFNO_NOT_AVAILABLE.
-	 * 1997: Berkeley DB 2.0 is released by Sleepycat Software, Inc.
-	 *       It defines dbm_pagfno() and dbm_dirfno() as macros.
-	 * 2011: gdbm-1.9 creates a separate dir file.
-	 *       dbm_pagfno() and dbm_dirfno() returns different descriptors.
-	 */
-#if defined(HAVE_DBM_PAGFNO)
-        rb_fd_fix_cloexec(dbm_pagfno(dbm));
-#endif
-#if defined(HAVE_DBM_DIRFNO)
-        rb_fd_fix_cloexec(dbm_dirfno(dbm));
-#endif
-
-#if defined(RUBYDBM_DB_HEADER) && defined(HAVE_TYPE_DBC)
-	/* Disable Berkeley DB error messages such as:
-	 * DB->put: attempt to modify a read-only database */
-        ((DBC*)dbm)->dbp->set_errfile(((DBC*)dbm)->dbp, NULL);
-#endif
-    }
-
-    if (!dbm) {
-	if (mode == -1) return Qnil;
-	rb_sys_fail_str(file);
-    }
-
-    if (dbmp->di_dbm)
-	dbm_close(dbmp->di_dbm);
-    dbmp->di_dbm = dbm;
-    dbmp->di_size = -1;
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   DBM.open(filename[, mode[, flags]]) -> dbm
- *   DBM.open(filename[, mode[, flags]]) {|dbm| block}
- *
- * Open a dbm database and yields it if a block is given. See also
- * <code>DBM.new</code>.
- */
-static VALUE
-fdbm_s_open(int argc, VALUE *argv, VALUE klass)
-{
-    VALUE obj = fdbm_alloc(klass);
-
-    if (NIL_P(fdbm_initialize(argc, argv, obj))) {
-	return Qnil;
-    }
-
-    if (rb_block_given_p()) {
-        return rb_ensure(rb_yield, obj, fdbm_close, obj);
-    }
-
-    return obj;
-}
-
-static VALUE
-fdbm_fetch(VALUE obj, VALUE keystr, VALUE ifnone)
-{
-    datum key, value;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    long len;
-
-    ExportStringValue(keystr);
-    len = RSTRING_LEN(keystr);
-    if (TOO_LONG(len)) goto not_found;
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = (DSIZE_TYPE)len;
-
-    GetDBM2(obj, dbmp, dbm);
-    value = dbm_fetch(dbm, key);
-    if (value.dptr == 0) {
-      not_found:
-	if (NIL_P(ifnone) && rb_block_given_p()) {
-	    keystr = rb_str_dup(keystr);
-	    return rb_yield(keystr);
-	}
-	return ifnone;
-    }
-    return rb_str_new(value.dptr, value.dsize);
-}
-
-/*
- * call-seq:
- *   dbm[key] -> string value or nil
- *
- * Return a value from the database by locating the key string
- * provided.  If the key is not found, returns nil.
- */
-static VALUE
-fdbm_aref(VALUE obj, VALUE keystr)
-{
-    return fdbm_fetch(obj, keystr, Qnil);
-}
-
-/*
- * call-seq:
- *   dbm.fetch(key[, ifnone]) -> value
- *
- * Return a value from the database by locating the key string
- * provided.  If the key is not found, returns +ifnone+. If +ifnone+
- * is not given, raises IndexError.
- */
-static VALUE
-fdbm_fetch_m(int argc, VALUE *argv, VALUE obj)
-{
-    VALUE keystr, valstr, ifnone;
-
-    rb_scan_args(argc, argv, "11", &keystr, &ifnone);
-    valstr = fdbm_fetch(obj, keystr, ifnone);
-    if (argc == 1 && !rb_block_given_p() && NIL_P(valstr))
-	rb_raise(rb_eIndexError, "key not found");
-
-    return valstr;
-}
-
-/*
- * call-seq:
- *   dbm.key(value) -> string
- *
- * Returns the key for the specified value.
- */
-static VALUE
-fdbm_key(VALUE obj, VALUE valstr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    long len;
-
-    ExportStringValue(valstr);
-    len = RSTRING_LEN(valstr);
-    if (TOO_LONG(len)) return Qnil;
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	if ((long)val.dsize == RSTRING_LEN(valstr) &&
-	    memcmp(val.dptr, RSTRING_PTR(valstr), val.dsize) == 0) {
-	    return rb_str_new(key.dptr, key.dsize);
-	}
-    }
-    return Qnil;
-}
-
-/* :nodoc: */
-static VALUE
-fdbm_index(VALUE hash, VALUE value)
-{
-    rb_warn("DBM#index is deprecated; use DBM#key");
-    return fdbm_key(hash, value);
-}
-
-/*
- * call-seq:
- *   dbm.select {|key, value| block} -> array
- *
- * Returns a new array consisting of the [key, value] pairs for which the code
- * block returns true.
- */
-static VALUE
-fdbm_select(VALUE obj)
-{
-    VALUE new = rb_ary_new();
-    datum key, val;
-    DBM *dbm;
-    struct dbmdata *dbmp;
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	VALUE assoc, v;
-	val = dbm_fetch(dbm, key);
-	assoc = rb_assoc_new(rb_str_new(key.dptr, key.dsize),
-			     rb_str_new(val.dptr, val.dsize));
-	v = rb_yield(assoc);
-	if (RTEST(v)) {
-	    rb_ary_push(new, assoc);
-	}
-	GetDBM2(obj, dbmp, dbm);
-    }
-
-    return new;
-}
-
-/*
- * call-seq:
- *   dbm.values_at(key, ...) -> Array
- *
- * Returns an array containing the values associated with the given keys.
- */
-static VALUE
-fdbm_values_at(int argc, VALUE *argv, VALUE obj)
-{
-    VALUE new = rb_ary_new2(argc);
-    int i;
-
-    for (i=0; i<argc; i++) {
-        rb_ary_push(new, fdbm_fetch(obj, argv[i], Qnil));
-    }
-
-    return new;
-}
-
-static void
-fdbm_modify(VALUE obj)
-{
-    if (OBJ_FROZEN(obj)) rb_error_frozen("DBM");
-}
-
-/*
- * call-seq:
- *   dbm.delete(key)
- *
- * Deletes an entry from the database.
- */
-static VALUE
-fdbm_delete(VALUE obj, VALUE keystr)
-{
-    datum key, value;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE valstr;
-    long len;
-
-    fdbm_modify(obj);
-    ExportStringValue(keystr);
-    len = RSTRING_LEN(keystr);
-    if (TOO_LONG(len)) goto not_found;
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = (DSIZE_TYPE)len;
-
-    GetDBM2(obj, dbmp, dbm);
-
-    value = dbm_fetch(dbm, key);
-    if (value.dptr == 0) {
-      not_found:
-	if (rb_block_given_p()) return rb_yield(keystr);
-	return Qnil;
-    }
-
-    /* need to save value before dbm_delete() */
-    valstr = rb_str_new(value.dptr, value.dsize);
-
-    if (dbm_delete(dbm, key)) {
-	dbmp->di_size = -1;
-	rb_raise(rb_eDBMError, "dbm_delete failed");
-    }
-    else if (dbmp->di_size >= 0) {
-	dbmp->di_size--;
-    }
-    return valstr;
-}
-
-/*
- * call-seq:
- *   dbm.shift() -> [key, value]
- *
- * Removes a [key, value] pair from the database, and returns it.
- * If the database is empty, returns nil.
- * The order in which values are removed/returned is not guaranteed.
- */
-static VALUE
-fdbm_shift(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE keystr, valstr;
-
-    fdbm_modify(obj);
-    GetDBM2(obj, dbmp, dbm);
-    dbmp->di_size = -1;
-
-    key = dbm_firstkey(dbm);
-    if (!key.dptr) return Qnil;
-    val = dbm_fetch(dbm, key);
-    keystr = rb_str_new(key.dptr, key.dsize);
-    valstr = rb_str_new(val.dptr, val.dsize);
-    dbm_delete(dbm, key);
-
-    return rb_assoc_new(keystr, valstr);
-}
-
-/*
- * call-seq:
- *   dbm.reject! {|key, value| block} -> self
- *   dbm.delete_if {|key, value| block} -> self
- *
- * Deletes all entries for which the code block returns true.
- * Returns self.
- */
-static VALUE
-fdbm_delete_if(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE keystr, valstr;
-    VALUE ret, ary = rb_ary_tmp_new(0);
-    int status = 0;
-    long i, n;
-
-    fdbm_modify(obj);
-    GetDBM2(obj, dbmp, dbm);
-    n = dbmp->di_size;
-    dbmp->di_size = -1;
-
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	keystr = rb_str_new(key.dptr, key.dsize);
-	OBJ_FREEZE(keystr);
-	valstr = rb_str_new(val.dptr, val.dsize);
-        ret = rb_protect(rb_yield, rb_assoc_new(rb_str_dup(keystr), valstr), &status);
-        if (status != 0) break;
-	if (RTEST(ret)) rb_ary_push(ary, keystr);
-	GetDBM2(obj, dbmp, dbm);
-    }
-
-    for (i = 0; i < RARRAY_LEN(ary); i++) {
-	keystr = RARRAY_AREF(ary, i);
-	key.dptr = RSTRING_PTR(keystr);
-	key.dsize = (DSIZE_TYPE)RSTRING_LEN(keystr);
-	if (dbm_delete(dbm, key)) {
-	    rb_raise(rb_eDBMError, "dbm_delete failed");
-	}
-    }
-    if (status) rb_jump_tag(status);
-    if (n > 0) dbmp->di_size = n - RARRAY_LEN(ary);
-    rb_ary_clear(ary);
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   dbm.clear
- *
- * Deletes all data from the database.
- */
-static VALUE
-fdbm_clear(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    fdbm_modify(obj);
-    GetDBM2(obj, dbmp, dbm);
-    dbmp->di_size = -1;
-    while (key = dbm_firstkey(dbm), key.dptr) {
-	if (dbm_delete(dbm, key)) {
-	    rb_raise(rb_eDBMError, "dbm_delete failed");
-	}
-    }
-    dbmp->di_size = 0;
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   dbm.invert -> hash
- *
- * Returns a Hash (not a DBM database) created by using each value in the
- * database as a key, with the corresponding key as its value.
- */
-static VALUE
-fdbm_invert(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE keystr, valstr;
-    VALUE hash = rb_hash_new();
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	keystr = rb_str_new(key.dptr, key.dsize);
-	valstr = rb_str_new(val.dptr, val.dsize);
-	rb_hash_aset(hash, valstr, keystr);
-    }
-    return hash;
-}
-
-static VALUE fdbm_store(VALUE,VALUE,VALUE);
-
-static VALUE
-update_i(RB_BLOCK_CALL_FUNC_ARGLIST(pair, dbm))
-{
-    const VALUE *ptr;
-    Check_Type(pair, T_ARRAY);
-    if (RARRAY_LEN(pair) < 2) {
-	rb_raise(rb_eArgError, "pair must be [key, value]");
-    }
-    ptr = RARRAY_CONST_PTR(pair);
-    fdbm_store(dbm, ptr[0], ptr[1]);
-    return Qnil;
-}
-
-/*
- * call-seq:
- *   dbm.update(obj)
- *
- * Updates the database with multiple values from the specified object.
- * Takes any object which implements the each_pair method, including
- * Hash and DBM objects.
- */
-static VALUE
-fdbm_update(VALUE obj, VALUE other)
-{
-    rb_block_call(other, rb_intern("each_pair"), 0, 0, update_i, obj);
-    return obj;
-}
-
-/*
- * call-seq:
- *   dbm.replace(obj)
- *
- * Replaces the contents of the database with the contents of the specified
- * object. Takes any object which implements the each_pair method, including
- * Hash and DBM objects.
- */
-static VALUE
-fdbm_replace(VALUE obj, VALUE other)
-{
-    fdbm_clear(obj);
-    rb_block_call(other, rb_intern("each_pair"), 0, 0, update_i, obj);
-    return obj;
-}
-
-/*
- * call-seq:
- *   dbm.store(key, value) -> value
- *   dbm[key] = value
- *
- * Stores the specified string value in the database, indexed via the
- * string key provided.
- */
-static VALUE
-fdbm_store(VALUE obj, VALUE keystr, VALUE valstr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    fdbm_modify(obj);
-    keystr = rb_obj_as_string(keystr);
-    valstr = rb_obj_as_string(valstr);
-
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = RSTRING_DSIZE(keystr);
-
-    val.dptr = RSTRING_PTR(valstr);
-    val.dsize = RSTRING_DSIZE(valstr);
-
-    GetDBM2(obj, dbmp, dbm);
-    dbmp->di_size = -1;
-    if (dbm_store(dbm, key, val, DBM_REPLACE)) {
-	dbm_clearerr(dbm);
-	if (errno == EPERM) rb_sys_fail(0);
-	rb_raise(rb_eDBMError, "dbm_store failed");
-    }
-
-    return valstr;
-}
-
-/*
- * call-seq:
- *   dbm.length -> integer
- *   dbm.size -> integer
- *
- * Returns the number of entries in the database.
- */
-static VALUE
-fdbm_length(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    int i = 0;
-
-    GetDBM2(obj, dbmp, dbm);
-    if (dbmp->di_size > 0) return INT2FIX(dbmp->di_size);
-
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	i++;
-    }
-    dbmp->di_size = i;
-
-    return INT2FIX(i);
-}
-
-/*
- * call-seq:
- *   dbm.empty?
- *
- * Returns true if the database is empty, false otherwise.
- */
-static VALUE
-fdbm_empty_p(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    GetDBM2(obj, dbmp, dbm);
-    if (dbmp->di_size < 0) {
-	dbm = dbmp->di_dbm;
-
-	for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	    return Qfalse;
-	}
-    }
-    else {
-	if (dbmp->di_size)
-	    return Qfalse;
-    }
-    return Qtrue;
-}
-
-/*
- * call-seq:
- *   dbm.each_value {|value| block} -> self
- *
- * Calls the block once for each value string in the database. Returns self.
- */
-static VALUE
-fdbm_each_value(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    RETURN_ENUMERATOR(obj, 0, 0);
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	rb_yield(rb_str_new(val.dptr, val.dsize));
-	GetDBM2(obj, dbmp, dbm);
-    }
-    return obj;
-}
-
-/*
- * call-seq:
- *   dbm.each_key {|key| block} -> self
- *
- * Calls the block once for each key string in the database. Returns self.
- */
-static VALUE
-fdbm_each_key(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-
-    RETURN_ENUMERATOR(obj, 0, 0);
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	rb_yield(rb_str_new(key.dptr, key.dsize));
-	GetDBM2(obj, dbmp, dbm);
-    }
-    return obj;
-}
-
-/*
- * call-seq:
- *   dbm.each_pair {|key,value| block} -> self
- *
- * Calls the block once for each [key, value] pair in the database.
- * Returns self.
- */
-static VALUE
-fdbm_each_pair(VALUE obj)
-{
-    datum key, val;
-    DBM *dbm;
-    struct dbmdata *dbmp;
-    VALUE keystr, valstr;
-
-    RETURN_ENUMERATOR(obj, 0, 0);
-
-    GetDBM2(obj, dbmp, dbm);
-
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	keystr = rb_str_new(key.dptr, key.dsize);
-	valstr = rb_str_new(val.dptr, val.dsize);
-	rb_yield(rb_assoc_new(keystr, valstr));
-	GetDBM2(obj, dbmp, dbm);
-    }
-
-    return obj;
-}
-
-/*
- * call-seq:
- *   dbm.keys -> array
- *
- * Returns an array of all the string keys in the database.
- */
-static VALUE
-fdbm_keys(VALUE obj)
-{
-    datum key;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE ary;
-
-    GetDBM2(obj, dbmp, dbm);
-
-    ary = rb_ary_new();
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	rb_ary_push(ary, rb_str_new(key.dptr, key.dsize));
-    }
-
-    return ary;
-}
-
-/*
- * call-seq:
- *   dbm.values -> array
- *
- * Returns an array of all the string values in the database.
- */
-static VALUE
-fdbm_values(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE ary;
-
-    GetDBM2(obj, dbmp, dbm);
-    ary = rb_ary_new();
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	rb_ary_push(ary, rb_str_new(val.dptr, val.dsize));
-    }
-
-    return ary;
-}
-
-/*
- * call-seq:
- *   dbm.include?(key) -> boolean
- *   dbm.has_key?(key) -> boolean
- *   dbm.member?(key) -> boolean
- *   dbm.key?(key) -> boolean
- *
- * Returns true if the database contains the specified key, false otherwise.
- */
-static VALUE
-fdbm_has_key(VALUE obj, VALUE keystr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    long len;
-
-    ExportStringValue(keystr);
-    len = RSTRING_LEN(keystr);
-    if (TOO_LONG(len)) return Qfalse;
-    key.dptr = RSTRING_PTR(keystr);
-    key.dsize = (DSIZE_TYPE)len;
-
-    GetDBM2(obj, dbmp, dbm);
-    val = dbm_fetch(dbm, key);
-    if (val.dptr) return Qtrue;
-    return Qfalse;
-}
-
-/*
- * call-seq:
- *   dbm.has_value?(value) -> boolean
- *   dbm.value?(value) -> boolean
- *
- * Returns true if the database contains the specified string value, false
- * otherwise.
- */
-static VALUE
-fdbm_has_value(VALUE obj, VALUE valstr)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    long len;
-
-    ExportStringValue(valstr);
-    len = RSTRING_LEN(valstr);
-    if (TOO_LONG(len)) return Qfalse;
-    val.dptr = RSTRING_PTR(valstr);
-    val.dsize = (DSIZE_TYPE)len;
-
-    GetDBM2(obj, dbmp, dbm);
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	if ((DSIZE_TYPE)val.dsize == (DSIZE_TYPE)RSTRING_LEN(valstr) &&
-	    memcmp(val.dptr, RSTRING_PTR(valstr), val.dsize) == 0)
-	    return Qtrue;
-    }
-    return Qfalse;
-}
-
-/*
- * call-seq:
- *   dbm.to_a -> array
- *
- * Converts the contents of the database to an array of [key, value] arrays,
- * and returns it.
- */
-static VALUE
-fdbm_to_a(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE ary;
-
-    GetDBM2(obj, dbmp, dbm);
-    ary = rb_ary_new();
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	rb_ary_push(ary, rb_assoc_new(rb_str_new(key.dptr, key.dsize),
-				      rb_str_new(val.dptr, val.dsize)));
-    }
-
-    return ary;
-}
-
-/*
- * call-seq:
- *   dbm.to_hash -> hash
- *
- * Converts the contents of the database to an in-memory Hash object, and
- * returns it.
- */
-static VALUE
-fdbm_to_hash(VALUE obj)
-{
-    datum key, val;
-    struct dbmdata *dbmp;
-    DBM *dbm;
-    VALUE hash;
-
-    GetDBM2(obj, dbmp, dbm);
-    hash = rb_hash_new();
-    for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) {
-	val = dbm_fetch(dbm, key);
-	rb_hash_aset(hash, rb_str_new(key.dptr, key.dsize),
-		           rb_str_new(val.dptr, val.dsize));
-    }
-
-    return hash;
-}
-
-/*
- * call-seq:
- *   dbm.reject {|key,value| block} -> Hash
- *
- * Converts the contents of the database to an in-memory Hash, then calls
- * Hash#reject with the specified code block, returning a new Hash.
- */
-static VALUE
-fdbm_reject(VALUE obj)
-{
-    return rb_hash_delete_if(fdbm_to_hash(obj));
-}
-
-/*
- * == Introduction
- *
- * The DBM class provides a wrapper to a Unix-style
- * {dbm}[https://en.wikipedia.org/wiki/Dbm] or Database Manager library.
- *
- * Dbm databases do not have tables or columns; they are simple key-value
- * data stores, like a Ruby Hash except not resident in RAM. Keys and values
- * must be strings.
- *
- * The exact library used depends on how Ruby was compiled. It could be any
- * of the following:
- *
- * - The original ndbm library is released in 4.3BSD.
- *   It is based on dbm library in Unix Version 7 but has different API to
- *   support multiple databases in a process.
- * - {Berkeley DB}[https://en.wikipedia.org/wiki/Berkeley_DB] versions
- *   1 thru 6, also known as BDB and Sleepycat DB, now owned by Oracle
- *   Corporation.
- * - Berkeley DB 1.x, still found in 4.4BSD derivatives (FreeBSD, OpenBSD, etc).
- * - {gdbm}[http://www.gnu.org/software/gdbm/], the GNU implementation of dbm.
- * - {qdbm}[http://fallabs.com/qdbm/index.html], another open source
- *   reimplementation of dbm.
- *
- * All of these dbm implementations have their own Ruby interfaces
- * available, which provide richer (but varying) APIs.
- *
- * == Cautions
- *
- * Before you decide to use DBM, there are some issues you should consider:
- *
- * - Each implementation of dbm has its own file format. Generally, dbm
- *   libraries will not read each other's files. This makes dbm files
- *   a bad choice for data exchange.
- *
- * - Even running the same OS and the same dbm implementation, the database
- *   file format may depend on the CPU architecture. For example, files may
- *   not be portable between PowerPC and 386, or between 32 and 64 bit Linux.
- *
- * - Different versions of Berkeley DB use different file formats. A change to
- *   the OS may therefore break DBM access to existing files.
- *
- * - Data size limits vary between implementations. Original Berkeley DB was
- *   limited to 2GB of data. Dbm libraries also sometimes limit the total
- *   size of a key/value pair, and the total size of all the keys that hash
- *   to the same value. These limits can be as little as 512 bytes. That said,
- *   gdbm and recent versions of Berkeley DB do away with these limits.
- *
- * Given the above cautions, DBM is not a good choice for long term storage of
- * important data. It is probably best used as a fast and easy alternative
- * to a Hash for processing large amounts of data.
- *
- * == Example
- *
- *  require 'dbm'
- *  db = DBM.open('rfcs', 0666, DBM::WRCREAT)
- *  db['822'] = 'Standard for the Format of ARPA Internet Text Messages'
- *  db['1123'] = 'Requirements for Internet Hosts - Application and Support'
- *  db['3068'] = 'An Anycast Prefix for 6to4 Relay Routers'
- *  puts db['822']
- */
-void
-Init_dbm(void)
-{
-    rb_cDBM = rb_define_class("DBM", rb_cObject);
-    /* Document-class: DBMError
-     * Exception class used to return errors from the dbm library.
-     */
-    rb_eDBMError = rb_define_class("DBMError", rb_eStandardError);
-    rb_include_module(rb_cDBM, rb_mEnumerable);
-
-    rb_define_alloc_func(rb_cDBM, fdbm_alloc);
-    rb_define_singleton_method(rb_cDBM, "open", fdbm_s_open, -1);
-
-    rb_define_method(rb_cDBM, "initialize", fdbm_initialize, -1);
-    rb_define_method(rb_cDBM, "close", fdbm_close, 0);
-    rb_define_method(rb_cDBM, "closed?", fdbm_closed, 0);
-    rb_define_method(rb_cDBM, "[]", fdbm_aref, 1);
-    rb_define_method(rb_cDBM, "fetch", fdbm_fetch_m, -1);
-    rb_define_method(rb_cDBM, "[]=", fdbm_store, 2);
-    rb_define_method(rb_cDBM, "store", fdbm_store, 2);
-    rb_define_method(rb_cDBM, "index",  fdbm_index, 1);
-    rb_define_method(rb_cDBM, "key",  fdbm_key, 1);
-    rb_define_method(rb_cDBM, "select",  fdbm_select, 0);
-    rb_define_method(rb_cDBM, "values_at", fdbm_values_at, -1);
-    rb_define_method(rb_cDBM, "length", fdbm_length, 0);
-    rb_define_method(rb_cDBM, "size", fdbm_length, 0);
-    rb_define_method(rb_cDBM, "empty?", fdbm_empty_p, 0);
-    rb_define_method(rb_cDBM, "each", fdbm_each_pair, 0);
-    rb_define_method(rb_cDBM, "each_value", fdbm_each_value, 0);
-    rb_define_method(rb_cDBM, "each_key", fdbm_each_key, 0);
-    rb_define_method(rb_cDBM, "each_pair", fdbm_each_pair, 0);
-    rb_define_method(rb_cDBM, "keys", fdbm_keys, 0);
-    rb_define_method(rb_cDBM, "values", fdbm_values, 0);
-    rb_define_method(rb_cDBM, "shift", fdbm_shift, 0);
-    rb_define_method(rb_cDBM, "delete", fdbm_delete, 1);
-    rb_define_method(rb_cDBM, "delete_if", fdbm_delete_if, 0);
-    rb_define_method(rb_cDBM, "reject!", fdbm_delete_if, 0);
-    rb_define_method(rb_cDBM, "reject", fdbm_reject, 0);
-    rb_define_method(rb_cDBM, "clear", fdbm_clear, 0);
-    rb_define_method(rb_cDBM, "invert", fdbm_invert, 0);
-    rb_define_method(rb_cDBM, "update", fdbm_update, 1);
-    rb_define_method(rb_cDBM, "replace", fdbm_replace, 1);
-
-    rb_define_method(rb_cDBM, "include?", fdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "has_key?", fdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "member?", fdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "has_value?", fdbm_has_value, 1);
-    rb_define_method(rb_cDBM, "key?", fdbm_has_key, 1);
-    rb_define_method(rb_cDBM, "value?", fdbm_has_value, 1);
-
-    rb_define_method(rb_cDBM, "to_a", fdbm_to_a, 0);
-    rb_define_method(rb_cDBM, "to_hash", fdbm_to_hash, 0);
-
-    /* Indicates that dbm_open() should open the database in read-only mode */
-    rb_define_const(rb_cDBM, "READER",  INT2FIX(O_RDONLY|RUBY_DBM_RW_BIT));
-
-    /* Indicates that dbm_open() should open the database in read/write mode */
-    rb_define_const(rb_cDBM, "WRITER",  INT2FIX(O_RDWR|RUBY_DBM_RW_BIT));
-
-    /* Indicates that dbm_open() should open the database in read/write mode,
-     * and create it if it does not already exist
-     */
-    rb_define_const(rb_cDBM, "WRCREAT", INT2FIX(O_RDWR|O_CREAT|RUBY_DBM_RW_BIT));
-
-    /* Indicates that dbm_open() should open the database in read/write mode,
-     * create it if it does not already exist, and delete all contents if it
-     * does already exist.
-     */
-    rb_define_const(rb_cDBM, "NEWDB",   INT2FIX(O_RDWR|O_CREAT|O_TRUNC|RUBY_DBM_RW_BIT));
-
-    {
-        VALUE version;
-#if defined(_DBM_IOERR)
-        version = rb_str_new2("ndbm (4.3BSD)");
-#elif defined(RUBYDBM_GDBM_HEADER)
-#  if defined(HAVE_DECLARED_LIBVAR_GDBM_VERSION)
-        /* since gdbm 1.9 */
-        version = rb_str_new2(gdbm_version);
-#  elif defined(HAVE_UNDECLARED_LIBVAR_GDBM_VERSION)
-        /* ndbm.h doesn't declare gdbm_version until gdbm 1.8.3.
-         * See extconf.rb for more information. */
-        RUBY_EXTERN char *gdbm_version;
-        version = rb_str_new2(gdbm_version);
-#  else
-        version = rb_str_new2("GDBM (unknown)");
-#  endif
-#elif defined(RUBYDBM_DB_HEADER)
-#  if defined(HAVE_DB_VERSION)
-        /* The version of the dbm library, if using Berkeley DB */
-        version = rb_str_new2(db_version(NULL, NULL, NULL));
-#  else
-        version = rb_str_new2("Berkeley DB (unknown)");
-#  endif
-#elif defined(_RELIC_H)
-#  if defined(HAVE_DPVERSION)
-        version = rb_sprintf("QDBM %s", dpversion);
-#  else
-        version = rb_str_new2("QDBM (unknown)");
-#  endif
-#else
-        version = rb_str_new2("ndbm (unknown)");
-#endif
-        /*
-         * Identifies ndbm library version.
-         *
-         * Examples:
-         *
-         * - "ndbm (4.3BSD)"
-         * - "Berkeley DB 4.8.30: (April  9, 2010)"
-         * - "Berkeley DB (unknown)" (4.4BSD, maybe)
-         * - "GDBM version 1.8.3. 10/15/2002 (built Jul  1 2011 12:32:45)"
-         * - "QDBM 1.8.78"
-         *
-         */
-        rb_define_const(rb_cDBM, "VERSION", version);
-    }
-}
diff --git a/ext/dbm/dbm.gemspec b/ext/dbm/dbm.gemspec
deleted file mode 100644
index 9f13f1c2a8..0000000000
--- a/ext/dbm/dbm.gemspec
+++ /dev/null
@@ -1,21 +0,0 @@
-# frozen_string_literal: true
-Gem::Specification.new do |s|
-  s.name = "dbm"
-  s.version = '1.1.0'
-  s.summary = "Provides a wrapper for the UNIX-style Database Manager Library"
-  s.description = "Provides a wrapper for the UNIX-style Database Manager Library"
-
-  s.require_path = %w{lib}
-  s.files = %w{README.md LICENSE.txt ext/dbm/extconf.rb ext/dbm/dbm.c}
-  s.extensions = %w{ext/dbm/extconf.rb}
-  s.required_ruby_version = ">= 2.3.0"
-
-  s.authors = ["Yukihiro Matsumoto"]
-  s.email = ["matz@ruby-lang.org"]
-  s.homepage = "https://github.com/ruby/dbm"
-  s.licenses = ["Ruby", "BSD-2-Clause"]
-
-  s.add_development_dependency "rake-compiler"
-  s.add_development_dependency "test-unit"
-  s.metadata["msys2_mingw_dependencies"] = "gdbm"
-end
diff --git a/ext/dbm/depend b/ext/dbm/depend
deleted file mode 100644
index dbad8041c1..0000000000
--- a/ext/dbm/depend
+++ /dev/null
@@ -1,162 +0,0 @@
-# AUTOGENERATED DEPENDENCIES START
-dbm.o: $(RUBY_EXTCONF_H)
-dbm.o: $(arch_hdrdir)/ruby/config.h
-dbm.o: $(hdrdir)/ruby.h
-dbm.o: $(hdrdir)/ruby/internal/anyargs.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/char.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/double.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/fixnum.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/gid_t.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/int.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/intptr_t.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/long.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/long_long.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/mode_t.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/off_t.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/pid_t.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/short.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/size_t.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/st_data_t.h
-dbm.o: $(hdrdir)/ruby/internal/arithmetic/uid_t.h
-dbm.o: $(hdrdir)/ruby/internal/assume.h
-dbm.o: $(hdrdir)/ruby/internal/attr/alloc_size.h
-dbm.o: $(hdrdir)/ruby/internal/attr/artificial.h
-dbm.o: $(hdrdir)/ruby/internal/attr/cold.h
-dbm.o: $(hdrdir)/ruby/internal/attr/const.h
-dbm.o: $(hdrdir)/ruby/internal/attr/constexpr.h
-dbm.o: $(hdrdir)/ruby/internal/attr/deprecated.h
-dbm.o: $(hdrdir)/ruby/internal/attr/diagnose_if.h
-dbm.o: $(hdrdir)/ruby/internal/attr/enum_extensibility.h
-dbm.o: $(hdrdir)/ruby/internal/attr/error.h
-dbm.o: $(hdrdir)/ruby/internal/attr/flag_enum.h
-dbm.o: $(hdrdir)/ruby/internal/attr/forceinline.h
-dbm.o: $(hdrdir)/ruby/internal/attr/format.h
-dbm.o: $(hdrdir)/ruby/internal/attr/maybe_unused.h
-dbm.o: $(hdrdir)/ruby/internal/attr/noalias.h
-dbm.o: $(hdrdir)/ruby/internal/attr/nodiscard.h
-dbm.o: $(hdrdir)/ruby/internal/attr/noexcept.h
-dbm.o: $(hdrdir)/ruby/internal/attr/noinline.h
-dbm.o: $(hdrdir)/ruby/internal/attr/nonnull.h
-dbm.o: $(hdrdir)/ruby/internal/attr/noreturn.h
-dbm.o: $(hdrdir)/ruby/internal/attr/pure.h
-dbm.o: $(hdrdir)/ruby/internal/attr/restrict.h
-dbm.o: $(hdrdir)/ruby/internal/attr/returns_nonnull.h
-dbm.o: $(hdrdir)/ruby/internal/attr/warning.h
-dbm.o: $(hdrdir)/ruby/internal/attr/weakref.h
-dbm.o: $(hdrdir)/ruby/internal/cast.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_is.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_is/apple.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_is/clang.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_is/gcc.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_is/intel.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_is/msvc.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_is/sunpro.h
-dbm.o: $(hdrdir)/ruby/internal/compiler_since.h
-dbm.o: $(hdrdir)/ruby/internal/config.h
-dbm.o: $(hdrdir)/ruby/internal/constant_p.h
-dbm.o: $(hdrdir)/ruby/internal/core.h
-dbm.o: $(hdrdir)/ruby/internal/core/rarray.h
-dbm.o: $(hdrdir)/ruby/internal/core/rbasic.h
-dbm.o: $(hdrdir)/ruby/internal/core/rbignum.h
-dbm.o: $(hdrdir)/ruby/internal/core/rclass.h
-dbm.o: $(hdrdir)/ruby/internal/core/rdata.h
-dbm.o: $(hdrdir)/ruby/internal/core/rfile.h
-dbm.o: $(hdrdir)/ruby/internal/core/rhash.h
-dbm.o: $(hdrdir)/ruby/internal/core/robject.h
-dbm.o: $(hdrdir)/ruby/internal/core/rregexp.h
-dbm.o: $(hdrdir)/ruby/internal/core/rstring.h
-dbm.o: $(hdrdir)/ruby/internal/core/rstruct.h
-dbm.o: $(hdrdir)/ruby/internal/core/rtypeddata.h
-dbm.o: $(hdrdir)/ruby/internal/ctype.h
-dbm.o: $(hdrdir)/ruby/internal/dllexport.h
-dbm.o: $(hdrdir)/ruby/internal/dosish.h
-dbm.o: $(hdrdir)/ruby/internal/error.h
-dbm.o: $(hdrdir)/ruby/internal/eval.h
-dbm.o: $(hdrdir)/ruby/internal/event.h
-dbm.o: $(hdrdir)/ruby/internal/fl_type.h
-dbm.o: $(hdrdir)/ruby/internal/gc.h
-dbm.o: $(hdrdir)/ruby/internal/glob.h
-dbm.o: $(hdrdir)/ruby/internal/globals.h
-dbm.o: $(hdrdir)/ruby/internal/has/attribute.h
-dbm.o: $(hdrdir)/ruby/internal/has/builtin.h
-dbm.o: $(hdrdir)/ruby/internal/has/c_attribute.h
-dbm.o: $(hdrdir)/ruby/internal/has/cpp_attribute.h
-dbm.o: $(hdrdir)/ruby/internal/has/declspec_attribute.h
-dbm.o: $(hdrdir)/ruby/internal/has/extension.h
-dbm.o: $(hdrdir)/ruby/internal/has/feature.h
-dbm.o: $(hdrdir)/ruby/internal/has/warning.h
-dbm.o: $(hdrdir)/ruby/internal/intern/array.h
-dbm.o: $(hdrdir)/ruby/internal/intern/bignum.h
-dbm.o: $(hdrdir)/ruby/internal/intern/class.h
-dbm.o: $(hdrdir)/ruby/internal/intern/compar.h
-dbm.o: $(hdrdir)/ruby/internal/intern/complex.h
-dbm.o: $(hdrdir)/ruby/internal/intern/cont.h
-dbm.o: $(hdrdir)/ruby/internal/intern/dir.h
-dbm.o: $(hdrdir)/ruby/internal/intern/enum.h
-dbm.o: $(hdrdir)/ruby/internal/intern/enumerator.h
-dbm.o: $(hdrdir)/ruby/internal/intern/error.h
-dbm.o: $(hdrdir)/ruby/internal/intern/eval.h
-dbm.o: $(hdrdir)/ruby/internal/intern/file.h
-dbm.o: $(hdrdir)/ruby/internal/intern/gc.h
-dbm.o: $(hdrdir)/ruby/internal/intern/hash.h
-dbm.o: $(hdrdir)/ruby/internal/intern/io.h
-dbm.o: $(hdrdir)/ruby/internal/intern/load.h
-dbm.o: $(hdrdir)/ruby/internal/intern/marshal.h
-dbm.o: $(hdrdir)/ruby/internal/intern/numeric.h
-dbm.o: $(hdrdir)/ruby/internal/intern/object.h
-dbm.o: $(hdrdir)/ruby/internal/intern/parse.h
-dbm.o: $(hdrdir)/ruby/internal/intern/proc.h
-dbm.o: $(hdrdir)/ruby/internal/intern/process.h
-dbm.o: $(hdrdir)/ruby/internal/intern/random.h
-dbm.o: $(hdrdir)/ruby/internal/intern/range.h
-dbm.o: $(hdrdir)/ruby/internal/intern/rational.h
-dbm.o: $(hdrdir)/ruby/internal/intern/re.h
-dbm.o: $(hdrdir)/ruby/internal/intern/ruby.h
-dbm.o: $(hdrdir)/ruby/internal/intern/select.h
-dbm.o: $(hdrdir)/ruby/internal/intern/select/largesize.h
-dbm.o: $(hdrdir)/ruby/internal/intern/signal.h
-dbm.o: $(hdrdir)/ruby/internal/intern/sprintf.h
-dbm.o: $(hdrdir)/ruby/internal/intern/string.h
-dbm.o: $(hdrdir)/ruby/internal/intern/struct.h
-dbm.o: $(hdrdir)/ruby/internal/intern/thread.h
-dbm.o: $(hdrdir)/ruby/internal/intern/time.h
-dbm.o: $(hdrdir)/ruby/internal/intern/variable.h
-dbm.o: $(hdrdir)/ruby/internal/intern/vm.h
-dbm.o: $(hdrdir)/ruby/internal/interpreter.h
-dbm.o: $(hdrdir)/ruby/internal/iterator.h
-dbm.o: $(hdrdir)/ruby/internal/memory.h
-dbm.o: $(hdrdir)/ruby/internal/method.h
-dbm.o: $(hdrdir)/ruby/internal/module.h
-dbm.o: $(hdrdir)/ruby/internal/newobj.h
-dbm.o: $(hdrdir)/ruby/internal/rgengc.h
-dbm.o: $(hdrdir)/ruby/internal/scan_args.h
-dbm.o: $(hdrdir)/ruby/internal/special_consts.h
-dbm.o: $(hdrdir)/ruby/internal/static_assert.h
-dbm.o: $(hdrdir)/ruby/internal/stdalign.h
-dbm.o: $(hdrdir)/ruby/internal/stdbool.h
-dbm.o: $(hdrdir)/ruby/internal/symbol.h
-dbm.o: $(hdrdir)/ruby/internal/value.h
-dbm.o: $(hdrdir)/ruby/internal/value_type.h
-dbm.o: $(hdrdir)/ruby/internal/variable.h
-dbm.o: $(hdrdir)/ruby/internal/warning_push.h
-dbm.o: $(hdrdir)/ruby/internal/xmalloc.h
-dbm.o: $(hdrdir)/ruby/assert.h
-dbm.o: $(hdrdir)/ruby/backward.h
-dbm.o: $(hdrdir)/ruby/backward/2/assume.h
-dbm.o: $(hdrdir)/ruby/backward/2/attributes.h
-dbm.o: $(hdrdir)/ruby/backward/2/bool.h
-dbm.o: $(hdrdir)/ruby/backward/2/gcc_version_since.h
-dbm.o: $(hdrdir)/ruby/backward/2/inttypes.h
-dbm.o: $(hdrdir)/ruby/backward/2/limits.h
-dbm.o: $(hdrdir)/ruby/backward/2/long_long.h
-dbm.o: $(hdrdir)/ruby/backward/2/stdalign.h
-dbm.o: $(hdrdir)/ruby/backward/2/stdarg.h
-dbm.o: $(hdrdir)/ruby/defines.h
-dbm.o: $(hdrdir)/ruby/intern.h
-dbm.o: $(hdrdir)/ruby/missing.h
-dbm.o: $(hdrdir)/ruby/ruby.h
-dbm.o: $(hdrdir)/ruby/st.h
-dbm.o: $(hdrdir)/ruby/subst.h
-dbm.o: dbm.c
-# AUTOGENERATED DEPENDENCIES END
diff --git a/ext/dbm/extconf.rb b/ext/dbm/extconf.rb
deleted file mode 100644
index c9a5518bf6..0000000000
--- a/ext/dbm/extconf.rb
+++ /dev/null
@@ -1,292 +0,0 @@
-# frozen_string_literal: true
-# configure option:
-#   --with-dbm-type=COMMA-SEPARATED-NDBM-TYPES
-#
-# ndbm type:
-#   libc        ndbm compatible library in libc.
-#   db          Berkeley DB (libdb)
-#   db2         Berkeley DB (libdb2)
-#   db1         Berkeley DB (libdb1)
-#   db6         Berkeley DB (libdb6)
-#   db5         Berkeley DB (libdb5)
-#   db4         Berkeley DB (libdb4)
-#   db3         Berkeley DB (libdb3)
-#   gdbm_compat GDBM since 1.8.1 (libgdbm_compat)
-#   gdbm        GDBM until 1.8.0 (libgdbm)
-#   qdbm        QDBM (libqdbm)
-#   ndbm        Some legacy OS may have libndbm.
-
-# :stopdoc:
-require 'mkmf'
-
-dir_config("dbm")
-
-if dblib = with_config("dbm-type", nil)
-  dblib = dblib.split(/[ ,]+/)
-else
-  dblib = %w(libc db db2 db1 db6 db5 db4 db3 gdbm_compat gdbm qdbm)
-end
-
-headers = {
-  "libc" => ["ndbm.h"], # 4.3BSD original ndbm, Berkeley DB 1 in 4.4BSD libc.
-  "db" => ["db.h"],
-  "db1" => ["db1/ndbm.h", "db1.h", "ndbm.h"],
-  "db2" => ["db2/db.h", "db2.h", "db.h"],
-  "db3" => ["db3/db.h", "db3.h", "db.h"],
-  "db4" => ["db4/db.h", "db4.h", "db.h"],
-  "db5" => ["db5/db.h", "db5.h", "db.h"],
-  "db6" => ["db6/db.h", "db6.h", "db.h"],
-  "gdbm_compat" => ["gdbm-ndbm.h", "gdbm/ndbm.h", "ndbm.h"], # GDBM since 1.8.1
-  "gdbm" => ["gdbm-ndbm.h", "gdbm/ndbm.h", "ndbm.h"], # GDBM until 1.8.0
-  "qdbm" => ["qdbm/relic.h", "relic.h"],
-}
-
-class << headers
-  attr_accessor :found
-  attr_accessor :defs
-end
-headers.found = []
-headers.defs = nil
-
-def headers.db_check(db, hdr)
-  old_libs = $libs.dup
-  old_defs = $defs.dup
-  result = db_check2(db, hdr)
-  if !result
-    $libs = old_libs
-    $defs = old_defs
-  end
-  result
-end
-
-def have_declared_libvar(var, headers = nil, opt = "", &b)
-  checking_for checking_message([*var].compact.join(' '), headers, opt) do
-    try_declared_libvar(var, headers, opt, &b)
-  end
-end
-
-def try_declared_libvar(var, headers = nil, opt = "", &b)
-  if try_link(<<"SRC", opt, &b)
-#{cpp_include(headers)}
-/*top*/
-int main(int argc, char *argv[]) {
-  void *conftest_var = &#{var};
-  return 0;
-}
-SRC
-    $defs.push(format("-DHAVE_DECLARED_LIBVAR_%s", var.tr_cpp))
-    true
-  else
-    false
-  end
-end
-
-def have_undeclared_libvar(var, headers = nil, opt = "", &b)
-  checking_for checking_message([*var].compact.join(' '), headers, opt) do
-    try_undeclared_libvar(var, headers, opt, &b)
-  end
-end
-
-def try_undeclared_libvar(var, headers = nil, opt = "", &b)
-  var, type = *var
-  if try_link(<<"SRC", opt, &b)
-#{cpp_include(headers)}
-/*top*/
-int main(int argc, char *argv[]) {
-  typedef #{type || 'int'} conftest_type;
-  extern conftest_type #{var};
-  conftest_type *conftest_var = &#{var};
-  return 0;
-}
-SRC
-    $defs.push(format("-DHAVE_UNDECLARED_LIBVAR_%s", var.tr_cpp))
-    true
-  else
-    false
-  end
-end
-
-def have_empty_macro_dbm_clearerr(headers = nil, opt = "", &b)
-  checking_for checking_message('empty macro of dbm_clearerr(foobarbaz)',
-                                headers, opt) do
-    try_toplevel('dbm_clearerr(foobarbaz)', headers, opt, &b)
-  end
-end
-
-def try_toplevel(src, headers = nil, opt = "", &b)
-  if try_compile(<<"SRC", opt, &b)
-#{cpp_include(headers)}
-/*top*/
-#{src}
-SRC
-    true
-  else
-    false
-  end
-end
-
-
-def headers.db_check2(db, hdr)
-  $defs.push(%{-DRUBYDBM_DBM_HEADER='"#{hdr}"'})
-  $defs.push(%{-DRUBYDBM_DBM_TYPE='"#{db}"'})
-
-  hsearch = nil
-
-  case db
-  when /^db[2-6]?$/
-    hsearch = "-DDB_DBM_HSEARCH"
-  when "gdbm_compat"
-    have_library("gdbm") or return false
-  end
-
-  if !have_type("DBM", hdr, hsearch)
-    return false
-  end
-
-  # 'libc' means ndbm is provided by libc.
-  # 4.3BSD original ndbm is contained in libc.
-  # 4.4BSD (and its derivatives such as NetBSD) contains Berkeley DB 1 in libc.
-  if !(db == 'libc' ? have_func('dbm_open("", 0, 0)', hdr, hsearch) :
-                      have_library(db, 'dbm_open("", 0, 0)', hdr, hsearch))
-    return false
-  end
-
-  # Skip a mismatch of Berkeley DB's ndbm.h and old GDBM library.
-  #
-  # dbm_clearerr() should be available for any ndbm implementation.
-  # It is available since the original (4.3BSD) ndbm and standardized by POSIX.
-  #
-  # However "can't resolve symbol 'dbm_clearerr'" problem may be caused by
-  # header/library mismatch: Berkeley DB ndbm.h and GDBM library until 1.8.3.
-  # GDBM (until 1.8.3) provides dbm_clearerr() as a empty macro in the header
-  # and the library don't provide dbm_clearerr().
-  # Berkeley DB provides dbm_clearerr() as a usual function.
-  # So Berkeley DB header with GDBM library causes the problem.
-  #
-  if !have_func('dbm_clearerr((DBM *)0)', hdr, hsearch)
-    return false
-  end
-
-  # Berkeley DB's ndbm.h (since 1.85 at least) defines DBM_SUFFIX.
-  # Note that _DB_H_ is not defined on Mac OS X because
-  # it uses Berkeley DB 1 but ndbm.h doesn't include db.h.
-  have_db_header = have_macro('DBM_SUFFIX', hdr, hsearch)
-
-  # Old GDBM's ndbm.h, until 1.8.3, defines dbm_clearerr as a macro which
-  # expands to no tokens.
-  have_gdbm_header1 = have_empty_macro_dbm_clearerr(hdr, hsearch)
-
-  # Recent GDBM's ndbm.h, since 1.9, includes gdbm.h and it defines _GDBM_H_.
-  # ndbm compatibility layer of GDBM is provided by libgdbm (until 1.8.0)
-  # and libgdbm_compat (since 1.8.1).
-  have_gdbm_header2 = have_macro('_GDBM_H_', hdr, hsearch)
-
-  # 4.3BSD's ndbm.h defines _DBM_IOERR.
-  # The original ndbm is provided by libc in 4.3BSD.
-  have_ndbm_header = have_macro('_DBM_IOERR', hdr, hsearch)
-
-  # GDBM provides ndbm functions in libgdbm_compat since GDBM 1.8.1.
-  # GDBM's ndbm.h defines _GDBM_H_ since GDBM 1.9.
-  # If _GDBM_H_ is defined, 'gdbm_compat' is required and reject 'gdbm'.
-  if have_gdbm_header2 && db == 'gdbm'
-    return false
-  end
-
-  if have_db_header
-    $defs.push('-DRUBYDBM_DB_HEADER')
-  end
-
-  have_gdbm_header = have_gdbm_header1 | have_gdbm_header2
-  if have_gdbm_header
-    $defs.push('-DRUBYDBM_GDBM_HEADER')
-  end
-
-  # ndbm.h is provided by the original (4.3BSD) ndbm,
-  # Berkeley DB 1 in libc of 4.4BSD and
-  # ndbm compatibility layer of GDBM.
-  # So, try to check header/library mismatch.
-  #
-  # Several (possibly historical) distributions provides libndbm.
-  # It may be Berkeley DB, GDBM or 4.3BSD ndbm.
-  # So mismatch check is not performed for that.
-  # Note that libndbm is searched only when --with-dbm-type=ndbm is
-  # given for configure.
-  #
-  if hdr == 'ndbm.h' && db != 'libc' && db != 'ndbm'
-    if /\Adb\d?\z/ !~ db && have_db_header
-      return false
-    end
-
-    if /\Agdbm/ !~ db && have_gdbm_header
-      return false
-    end
-
-    if have_ndbm_header
-      return false
-    end
-  end
-
-  # Berkeley DB
-  have_func('db_version((int *)0, (int *)0, (int *)0)', hdr, hsearch)
-
-  # GDBM
-  have_gdbm_version = have_declared_libvar("gdbm_version", hdr, hsearch)
-  # gdbm_version is available since very old version (GDBM 1.5 at least).
-  # However it is not declared by ndbm.h until GDBM 1.8.3.
-  # We can't include both ndbm.h and gdbm.h because they both define datum type.
-  # ndbm.h includes gdbm.h and gdbm_version is declared since GDBM 1.9.
-  have_gdbm_version |= have_undeclared_libvar(["gdbm_version", "char *"], hdr, hsearch)
-
-  # QDBM
-  have_var("dpversion", hdr, hsearch)
-
-  # detect mismatch between GDBM header and other library.
-  # If GDBM header is included, GDBM library should be linked.
-  if have_gdbm_header && !have_gdbm_version
-    return false
-  end
-
-  # DBC type is required to disable error messages by Berkeley DB 2 or later.
-  if have_db_header
-    have_type("DBC", hdr, hsearch)
-  end
-
-  if hsearch
-    $defs << hsearch
-    @defs = hsearch
-  end
-  $defs << '-DDBM_HDR="<'+hdr+'>"'
-  @found << hdr
-
-  puts "header: #{hdr}"
-  puts "library: #{db}"
-
-  true
-end
-
-if dblib.any? {|db| headers.fetch(db, ["ndbm.h"]).any? {|hdr| headers.db_check(db, hdr) } }
-  have_header("cdefs.h")
-  have_header("sys/cdefs.h")
-  have_func("dbm_pagfno((DBM *)0)", headers.found, headers.defs)
-  have_func("dbm_dirfno((DBM *)0)", headers.found, headers.defs)
-  convertible_int("datum.dsize", headers.found, headers.defs)
-  checking_for("sizeof(DBM) is available") {
-    if try_compile(<<SRC)
-#ifdef HAVE_CDEFS_H
-# include <cdefs.h>
-#endif
-#ifdef HAVE_SYS_CDEFS_H
-# include <sys/cdefs.h>
-#endif
-#include DBM_HDR
-
-const int sizeof_DBM = (int)sizeof(DBM);
-SRC
-      $defs << '-DDBM_SIZEOF_DBM=sizeof(DBM)'
-    else
-      $defs << '-DDBM_SIZEOF_DBM=0'
-    end
-  }
-  create_makefile("dbm")
-end
-# :startdoc: