diff --git a/configure/os/CONFIG.Common.interix-x86 b/configure/os/CONFIG.Common.interix-x86
deleted file mode 100644
index 2a4c9e15e..000000000
--- a/configure/os/CONFIG.Common.interix-x86
+++ /dev/null
@@ -1,41 +0,0 @@
-# CONFIG.Common.interix-x86
-#
-# $Id$
-# This file is maintained by the build community.
-#
-# Definitions for interix-x86 target builds
-# Sites may override these definitions in CONFIG_SITE.Common.interix-x86
-#-------------------------------------------------------
-
-# Include definitions common to all Unix targets
-include $(CONFIG)/os/CONFIG.Common.UnixCommon
-
-OS_CLASS = interix
-ARCH_CLASS = x86
-
-EXE=
-
-POSIX_CPPFLAGS  = -D_POSIX_C_SOURCE=199506L 
-POSIX_CPPFLAGS += -D_POSIX_THREADS
-POSIX_CPPFLAGS += -D_ALL_SOURCE
-POSIX_CPPFLAGS += -D_POSIX_TIMERS
-
-POSIX_CPPFLAGS += -D_REENTRANT
-
-POSIX_LDLIBS += -lpthread
-
-ARCH_DEP_CPPFLAGS += -D_X86_
-
-OP_SYS_CPPFLAGS += -DUNIX
-
-# Set runtime path for shared libraries
-SHRLIBDIR_LDFLAGS += $(SHRLIB_DEPLIB_DIRS:%=-Wl,-rpath,%)
-
-# Set runtime path for products
-PRODDIR_LDFLAGS += $(PROD_DEPLIB_DIRS:%=-Wl,-rpath,%)
-
-#  Definitions used when COMMANDLINE_LIBRARY is READLINE
-INCLUDES_READLINE = -I$(GNU_DIR)/include
-LDFLAGS_READLINE += -L$(GNU_DIR)/lib
-LDLIBS_READLINE = -lreadline
-
diff --git a/configure/os/CONFIG.interix-x86.Common b/configure/os/CONFIG.interix-x86.Common
deleted file mode 100644
index 1c4cdb9e2..000000000
--- a/configure/os/CONFIG.interix-x86.Common
+++ /dev/null
@@ -1,22 +0,0 @@
-# CONFIG.interix-x86.Common
-#
-# $Id$
-# This file is maintained by the build community.
-#
-# Definitions for interix-x86 host archs
-# Sites may override these definitions in CONFIG_SITE.interix-x86.Common
-#-------------------------------------------------------
-
-#Include definitions common to unix hosts
-include $(CONFIG)/os/CONFIG.UnixCommon.Common
-
-WIND_HOST_TYPE = x86-win32
-OSITHREAD_USE_DEFAULT_STACK = NO
-
-#HOSTEXE=.exe
-HOSTEXE=
-
-# Needed to find dlls for base installed build tools (antelope,eflex,...)
-#PATH := $(EPICS_BASE_TOOLS_BIN):$(PATH)
-
-
diff --git a/configure/os/CONFIG.interix-x86.interix-x86 b/configure/os/CONFIG.interix-x86.interix-x86
deleted file mode 100644
index ebab6fa46..000000000
--- a/configure/os/CONFIG.interix-x86.interix-x86
+++ /dev/null
@@ -1,34 +0,0 @@
-#  CONFIG.interix-x86.interix-x86
-#
-# $Id$
-#
-# Definitions for interix-x86 host - interix-x86 target builds
-# Sites may override these definitions in CONFIG_SITE.interix-x86.interix-x86
-#-------------------------------------------------------
-
-# Include common gnu compiler definitions
-include $(CONFIG)/CONFIG.gnuCommon
-
-## Shared libraries for interix not implemented yet
-SHARED_LIBRARIES=NO
-
-# interix's gcc, g++, ar, ld, and ranlib must be in user's path
-CC = gcc
-CCC = g++
-AR = ar -rc
-LD = ld -r
-#######RANLIB = ranlib   # ranlib exists but is not found ???
-RANLIB =
-
-# Avoid 'position-independent code is always generated' message
-SHRLIB_CFLAGS =
-SHRLIB_LDFLAGS = -shared
-LOADABLE_SHRLIB_LDFLAGS = -shared
-
-# -ansi eliminates strdup
-#CONFORM_CFLAGS_ANSI = 
-#CONFORM_CFLAGS_STRICT = -pedantic
-#CONFORM_CXXFLAGS_ANSI = 
-#CONFORM_CXXFLAGS_STRICT = -pedantic
-
-