diff --git a/builds/posix/prefix.linux_amd64 b/builds/posix/prefix.linux_amd64
new file mode 100644
index 0000000000..f67af3aa01
--- /dev/null
+++ b/builds/posix/prefix.linux_amd64
@@ -0,0 +1,34 @@
+# The contents of this file are subject to the Interbase Public
+# License Version 1.0 (the "License"); you may not use this file
+# except in compliance with the License. You may obtain a copy
+# of the License at http://www.Inprise.com/IPL.html
+#
+# Software distributed under the License is distributed on an
+# "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
+# or implied. See the License for the specific language governing
+# rights and limitations under the License.
+#
+# The Original Code was created by Inprise Corporation
+# and its predecessors. Portions created by Inprise Corporation are
+# Copyright (C) Inprise Corporation.
+#
+# All Rights Reserved.
+# Contributor(s): ______________________________________.
+# Start of file prefix.linux:	$(VERSION)	$(PLATFORM)
+#$Id: prefix.linux_amd64,v 1.1 2004-01-12 04:57:45 skidder Exp $
+# 2 Oct 2002, Nickolay Samofatov - Major cleanup
+
+PROD_FLAGS=-ggdb -O3 -fno-omit-frame-pointer -DNDEBUG -DLINUX -pipe -MMD -fPIC -fmessage-length=0
+# uncomment if you need PROD_BUILD engine that is possible to debug
+#PROD_FLAGS=-ggdb -O3 -march=i586 -mcpu=i686 -fno-builtin -DNDEBUG -DLINUX -pipe -MMD -fPIC -fmessage-length=0
+DEV_FLAGS=-ggdb -DLINUX -DDEBUG_GDS_ALLOC -pipe -MMD -p -fPIC -Wall -Wno-switch -Wno-parentheses -Wno-unknown-pragmas -Wno-unused-variable -fmessage-length=0
+
+OS_ServerFiles=inet_server.cpp
+
+LIB_LINK_OPTIONS:=-shared
+LIB_LINK_RPATH:=-Wl,-rpath,
+LIB_LINK_SONAME:=-Wl,-soname,
+EMBED_UTIL_TARGETS=gstat gds_drop gds_relay gsec nbackup fb_lock_print
+CLIENT_UTIL_TARGETS=gds_drop gds_relay gstat gsec fbguard fbmgr_bin nbackup fb_lock_print
+
+Physical_IO_Module=os/posix/unix.cpp
diff --git a/configure.in b/configure.in
index a3bef8894b..9689b826f2 100644
--- a/configure.in
+++ b/configure.in
@@ -1,4 +1,4 @@
-dnl $Id: configure.in,v 1.189 2004-01-07 00:31:32 brodsom Exp $
+dnl $Id: configure.in,v 1.190 2004-01-12 04:58:09 skidder Exp $
 
 dnl ############################# INITIALISATION ###############################
 
@@ -29,6 +29,7 @@ dnl      EDITLINE_FLG     : support fancy command line editing in isql
 dnl      SHRLIB_EXT       : suffix of shared library files
 
 RAW_DEVICES_FLG=Y
+INSTALL_PREFIX=""
 case "$target" in
   *-*-darwin*)
     MAKEFILE_PREFIX=darwin
@@ -48,8 +49,19 @@ case "$target" in
     SHRLIB_EXT=so
     ;;
 
+  x86_64*-*-linux-*)
+    MAKEFILE_PREFIX=linux_amd64
+    INSTALL_PREFIX=linux
+    PLATFORM=LINUX
+    AC_DEFINE(LINUX, 1, [Define this if OS is Linux])
+    LOCK_MANAGER_FLG=Y
+    EDITLINE_FLG=Y
+    SHRLIB_EXT=so
+    ;;
+
   sparc*-*-linux-*)
     MAKEFILE_PREFIX=linux_sparc32
+    INSTALL_PREFIX=linux
     PLATFORM=LINUX
     AC_DEFINE(LINUX, 1, [Define this if OS is Linux])
     LOCK_MANAGER_FLG=Y
@@ -126,6 +138,10 @@ case "$target" in
     ;;
 esac
 
+if test "$INSTALL_PREFIX" = ""; then
+  INSTALL_PREFIX=$MAKEFILE_PREFIX
+fi
+
 AC_SUBST(MAKEFILE_PREFIX)
 AC_SUBST(PLATFORM)
 AC_SUBST(SHRLIB_EXT)
@@ -837,7 +853,7 @@ gen/Makefile.embed.isql:${MAKE_SRC_DIR}/Makefile.in.embed.isql
 gen/Makefile.embed.gdef:${MAKE_SRC_DIR}/Makefile.in.embed.gdef
 gen/Makefile.embed.qli:${MAKE_SRC_DIR}/Makefile.in.embed.qli
 gen/Makefile.embed.gpre:${MAKE_SRC_DIR}/Makefile.in.embed.gpre
-gen/Makefile.install:builds/install/arch-specific/${MAKEFILE_PREFIX}/Makefile.in
+gen/Makefile.install:builds/install/arch-specific/${INSTALL_PREFIX}/Makefile.in
 Makefile:Makefile.in
 gen/Makefile.extern.editline:${MAKE_SRC_DIR}/Makefile.in.extern.editline
 )