* ext/dbm/extconf.rb: allow multiple candidates for dbm-type.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@10944 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 26 insertions, 34 deletions

diff --git a/ext/dbm/extconf.rb b/ext/dbm/extconf.rb
index 52ec688952..0074ab605b 100644
--- a/ext/dbm/extconf.rb
+++ b/ext/dbm/extconf.rb
@@ -2,9 +2,13 @@ require 'mkmf'
 
 dir_config("dbm")
 
-dblib = with_config("dbm-type", nil)
+if dblib = with_config("dbm-type", nil)
+  dblib = dblib.split(/[ ,]+/)
+else
+  dblib = %w(db db2 db1 dbm gdbm gdbm_compat qdbm)
+end
 
-$dbm_conf_headers = {
+headers = {
   "db" => ["db.h"],
   "db1" => ["db1/ndbm.h", "db1.h", "ndbm.h"],
   "db2" => ["db2/db.h", "db2.h", "db.h"],
@@ -14,48 +18,36 @@ $dbm_conf_headers = {
   "qdbm" => ["relic.h"],
 }
 
-def db_check(db)
-  $dbm_conf_db_prefix = ""
-  $dbm_conf_have_gdbm = false
-  hsearch = ""
+def headers.db_check(db)
+  db_prefix = nil
+  have_gdbm = false
+  hsearch = nil
 
   case db
   when /^db2?$/
-    $dbm_conf_db_prefix = "__db_n"
+    db_prefix = "__db_n"
     hsearch = "-DDB_DBM_HSEARCH "
   when "gdbm"
-    $dbm_conf_have_gdbm = true
+    have_gdbm = true
   when "gdbm_compat"
-    $dbm_conf_have_gdbm = true
+    have_gdbm = true
     have_library("gdbm") or return false
   end
-
-  if have_library(db, db_prefix("dbm_open")) || have_func(db_prefix("dbm_open"))
-    for hdr in $dbm_conf_headers.fetch(db, ["ndbm.h"])
-      if have_header(hdr.dup) and have_type("DBM", hdr.dup, hsearch)
-	$defs << hsearch << '-DDBM_HDR="<'+hdr+'>"'
-	return true
-      end
-    end
-  end
-  return false
-end
-
-def db_prefix(func)
-  $dbm_conf_db_prefix+func
-end
-
-if dblib
-  dbm_hdr = db_check(dblib)
-else
-  dbm_hdr = %w(db db2 db1 dbm gdbm gdbm_compat qdbm).any? do |dblib|
-    db_check(dblib)
+  db_prefix ||= ""
+
+  if (have_library(db, db_prefix+"dbm_open") || have_func(db_prefix+"dbm_open")) and
+      hdr = self.fetch(db, ["ndbm.h"]).find {|hdr| have_type("DBM", hdr, hsearch)}
+    have_func(db_prefix+"dbm_clearerr") unless have_gdbm
+    $defs << hsearch if hsearch
+    $defs << '-DDBM_HDR="<'+hdr+'>"'
+    true
+  else
+    false
   end
 end
 
-have_header("cdefs.h") 
-have_header("sys/cdefs.h") 
-if dbm_hdr and have_func(db_prefix("dbm_open"))
-  have_func(db_prefix("dbm_clearerr")) unless $dbm_conf_have_gdbm
+if dblib.any? {|db| headers.db_check(db)}
+  have_header("cdefs.h")
+  have_header("sys/cdefs.h")
   create_makefile("dbm")
 end