xor code backend implementation (WIP)

Facing some nasty dlopen() issues when testing with
"test/liberasurecode_test"

Signed-off-by: Tushar Gohad <tushar.gohad@intel.com>

15 files changed, 2015 insertions, 184 deletions

diff --git a/Makefile.am b/Makefile.am
index 08df99e..216ebf0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,7 +1,7 @@
 # Top-level liberasurecode automake configuration
 ACLOCAL_AMFLAGS = -I m4
 
-SUBDIRS = src/builtin/xor_codes test
+SUBDIRS = src test
 EXTRA_DIST = autogen.sh
 
 if DEBUG
@@ -28,20 +28,6 @@ include_HEADERS = \
 	include/xor_codes/xor_hd_code_defs.h \
 	include/xor_codes/xor_code.h
 
-lib_LTLIBRARIES = liberasurecode.la
-
-# liberasurecode params
-liberasurecode_la_SOURCES = \
-	src/main.c \
-	src/backends/xor/flat_xor_3.c \
-	src/utils/chksum/galois.c \
-	src/utils/chksum/crc32.c \
-	src/utils/chksum/alg_sig.c
-
-liberasurecode_la_LIBADD = src/builtin/xor_codes/libXorcode.la -lgf_complete
-# Version format  (C - A).(A).(R) for C:R:A input
-liberasurecode_la_LDFLAGS = -rpath '$(libdir)' -version-info 9:4:9
-
 
 test: check
 	@./test/alg_sig_test
@@ -52,8 +38,9 @@ VALGRIND_EXEC_COMMAND = $(LIBTOOL_COMMAND) valgrind --tool=memcheck \
 	--malloc-fill=A5 --free-fill=DE --fullpath-after=.
 
 valgrind-test: check
-	@$(VALGRIND_EXEC_COMMAND) ./test/alg_sig_test
-	@$(VALGRIND_EXEC_COMMAND) ./test/test_xor_hd_code
+	@$(VALGRIND_EXEC_COMMAND) ./test/liberasurecode_test
+#	@$(VALGRIND_EXEC_COMMAND) ./test/alg_sig_test
+#	@$(VALGRIND_EXEC_COMMAND) ./test/test_xor_hd_code
 
 CLEANFILES = cscope.in.out cscope.out cscope.po.out
 
diff --git a/configure.ac b/configure.ac
index 72289da..2114860 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ AC_GNU_SOURCE
 
 AC_PREREQ([2.61])
 
-AM_INIT_AUTOMAKE([subdir-objects no-dependencies])
+AM_INIT_AUTOMAKE([subdir-objects no-dependencies silent-rules])
 LT_INIT # libtool
 
 AC_CONFIG_HEADER(include/config.h)
@@ -12,6 +12,7 @@ dnl Needed when reconfiguring with 'autoreconf -i -s'
 AC_CONFIG_MACRO_DIR([m4])
 
 AM_MAINTAINER_MODE([disable])
+AM_SILENT_RULES([yes])
 
 dnl Compiling with per-target flags requires AM_PROG_CC_C_O.
 AC_PROG_CC
@@ -57,10 +58,14 @@ dnl Expand the sources and objects needed to build the library
 AC_SUBST(ac_aux_dir)
 AC_SUBST(OBJECTS)
 
-AC_CONFIG_FILES([Makefile \
-                 src/builtin/xor_codes/Makefile \
-                 test/Makefile \
-                 erasurecode.pc \
-                 Xorcode.pc])
+AC_CONFIG_FILES([\
+    src/builtin/xor_codes/Makefile \
+    src/Makefile \
+    test/Makefile \
+    Makefile \
+    erasurecode.pc \
+    Xorcode.pc
+])
+
 AC_OUTPUT
 
diff --git a/include/config.h b/include/config.h
new file mode 100644
index 0000000..178d787
--- /dev/null
+++ b/include/config.h
@@ -0,0 +1,185 @@
+/* include/config.h.  Generated from config.h.in by configure.  */
+/* include/config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Support Altivec instructions */
+/* #undef HAVE_ALTIVEC */
+
+/* Support AVX (Advanced Vector Extensions) instructions */
+/* #undef HAVE_AVX */
+
+/* Define to 1 if you have the `calloc' function. */
+#define HAVE_CALLOC 1
+
+/* Define to 1 if you have the <cauchy.h> header file. */
+/* #undef HAVE_CAUCHY_H */
+
+/* Define to 1 if you have the <ctype.h> header file. */
+#define HAVE_CTYPE_H 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* Define to 1 if you have the `free' function. */
+#define HAVE_FREE 1
+
+/* Define to 1 if you have the <galois.h> header file. */
+/* #undef HAVE_GALOIS_H */
+
+/* Define to 1 if you have the <gf_complete.h> header file. */
+#define HAVE_GF_COMPLETE_H 1
+
+/* Define to 1 if you have the <iconv.h> header file. */
+#define HAVE_ICONV_H 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the <jerasure.h> header file. */
+/* #undef HAVE_JERASURE_H */
+
+/* Define to 1 if you have the <liberation.h> header file. */
+/* #undef HAVE_LIBERATION_H */
+
+/* Define to 1 if you have the `gf_complete' library (-lgf_complete). */
+#define HAVE_LIBGF_COMPLETE 1
+
+/* Define to 1 if you have the `malloc' function. */
+#define HAVE_MALLOC 1
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#define HAVE_MALLOC_H 1
+
+/* Define to 1 if you have the <math.h> header file. */
+#define HAVE_MATH_H 1
+
+/* Define to 1 if you have the <memory.h> header file. */
+#define HAVE_MEMORY_H 1
+
+/* Support mmx instructions */
+#define HAVE_MMX /**/
+
+/* Define to 1 if you have the <pthread.h> header file. */
+#define HAVE_PTHREAD_H 1
+
+/* Define to 1 if you have the `realloc' function. */
+#define HAVE_REALLOC 1
+
+/* Define to 1 if you have the <reed_sol.h> header file. */
+/* #undef HAVE_REED_SOL_H */
+
+/* Define to 1 if you have the <signal.h> header file. */
+#define HAVE_SIGNAL_H 1
+
+/* Support SSE (Streaming SIMD Extensions) instructions */
+#define HAVE_SSE /**/
+
+/* Support SSE2 (Streaming SIMD Extensions 2) instructions */
+#define HAVE_SSE2 /**/
+
+/* Support SSE3 (Streaming SIMD Extensions 3) instructions */
+#define HAVE_SSE3 /**/
+
+/* Support SSSE4.1 (Streaming SIMD Extensions 4.1) instructions */
+/* #undef HAVE_SSE4_1 */
+
+/* Support SSSE4.2 (Streaming SIMD Extensions 4.2) instructions */
+/* #undef HAVE_SSE4_2 */
+
+/* Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions */
+#define HAVE_SSSE3 /**/
+
+/* Define to 1 if you have the <stdarg.h> header file. */
+#define HAVE_STDARG_H 1
+
+/* Define to 1 if you have the <stddef.h> header file. */
+#define HAVE_STDDEF_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#define HAVE_STDIO_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#define LT_OBJDIR ".libs/"
+
+/* Define to 1 if your C compiler doesn't accept -c and -o together. */
+/* #undef NO_MINUS_C_MINUS_O */
+
+/* Name of package */
+#define PACKAGE "erasurecode"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT ""
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "erasurecode"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "erasurecode 0.9.4"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "erasurecode"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "0.9.4"
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# define _ALL_SOURCE 1
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# define _POSIX_PTHREAD_SEMANTICS 1
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# define _TANDEM_SOURCE 1
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# define __EXTENSIONS__ 1
+#endif
+
+
+/* Version number of package */
+#define VERSION "0.9.4"
+
+/* Define to 1 if on MINIX. */
+/* #undef _MINIX */
+
+/* Define to 2 if the system does not provide POSIX.1 features except with
+   this defined. */
+/* #undef _POSIX_1_SOURCE */
+
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+/* #undef _POSIX_SOURCE */
diff --git a/include/config.h.in b/include/config.h.in
index 462461b..d2b42c9 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -57,6 +57,9 @@
 /* Support mmx instructions */
 #undef HAVE_MMX
 
+/* Define to 1 if you have the <pthread.h> header file. */
+#undef HAVE_PTHREAD_H
+
 /* Define to 1 if you have the `realloc' function. */
 #undef HAVE_REALLOC
 
diff --git a/include/config.h.in~ b/include/config.h.in~
new file mode 100644
index 0000000..462461b
--- /dev/null
+++ b/include/config.h.in~
@@ -0,0 +1,181 @@
+/* include/config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Support Altivec instructions */
+#undef HAVE_ALTIVEC
+
+/* Support AVX (Advanced Vector Extensions) instructions */
+#undef HAVE_AVX
+
+/* Define to 1 if you have the `calloc' function. */
+#undef HAVE_CALLOC
+
+/* Define to 1 if you have the <cauchy.h> header file. */
+#undef HAVE_CAUCHY_H
+
+/* Define to 1 if you have the <ctype.h> header file. */
+#undef HAVE_CTYPE_H
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
+/* Define to 1 if you have the `free' function. */
+#undef HAVE_FREE
+
+/* Define to 1 if you have the <galois.h> header file. */
+#undef HAVE_GALOIS_H
+
+/* Define to 1 if you have the <gf_complete.h> header file. */
+#undef HAVE_GF_COMPLETE_H
+
+/* Define to 1 if you have the <iconv.h> header file. */
+#undef HAVE_ICONV_H
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the <jerasure.h> header file. */
+#undef HAVE_JERASURE_H
+
+/* Define to 1 if you have the <liberation.h> header file. */
+#undef HAVE_LIBERATION_H
+
+/* Define to 1 if you have the `gf_complete' library (-lgf_complete). */
+#undef HAVE_LIBGF_COMPLETE
+
+/* Define to 1 if you have the `malloc' function. */
+#undef HAVE_MALLOC
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#undef HAVE_MALLOC_H
+
+/* Define to 1 if you have the <math.h> header file. */
+#undef HAVE_MATH_H
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Support mmx instructions */
+#undef HAVE_MMX
+
+/* Define to 1 if you have the `realloc' function. */
+#undef HAVE_REALLOC
+
+/* Define to 1 if you have the <reed_sol.h> header file. */
+#undef HAVE_REED_SOL_H
+
+/* Define to 1 if you have the <signal.h> header file. */
+#undef HAVE_SIGNAL_H
+
+/* Support SSE (Streaming SIMD Extensions) instructions */
+#undef HAVE_SSE
+
+/* Support SSE2 (Streaming SIMD Extensions 2) instructions */
+#undef HAVE_SSE2
+
+/* Support SSE3 (Streaming SIMD Extensions 3) instructions */
+#undef HAVE_SSE3
+
+/* Support SSSE4.1 (Streaming SIMD Extensions 4.1) instructions */
+#undef HAVE_SSE4_1
+
+/* Support SSSE4.2 (Streaming SIMD Extensions 4.2) instructions */
+#undef HAVE_SSE4_2
+
+/* Support SSSE3 (Supplemental Streaming SIMD Extensions 3) instructions */
+#undef HAVE_SSSE3
+
+/* Define to 1 if you have the <stdarg.h> header file. */
+#undef HAVE_STDARG_H
+
+/* Define to 1 if you have the <stddef.h> header file. */
+#undef HAVE_STDDEF_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdio.h> header file. */
+#undef HAVE_STDIO_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
+/* Define to 1 if your C compiler doesn't accept -c and -o together. */
+#undef NO_MINUS_C_MINUS_O
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Enable extensions on AIX 3, Interix.  */
+#ifndef _ALL_SOURCE
+# undef _ALL_SOURCE
+#endif
+/* Enable GNU extensions on systems that have them.  */
+#ifndef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* Enable threading extensions on Solaris.  */
+#ifndef _POSIX_PTHREAD_SEMANTICS
+# undef _POSIX_PTHREAD_SEMANTICS
+#endif
+/* Enable extensions on HP NonStop.  */
+#ifndef _TANDEM_SOURCE
+# undef _TANDEM_SOURCE
+#endif
+/* Enable general extensions on Solaris.  */
+#ifndef __EXTENSIONS__
+# undef __EXTENSIONS__
+#endif
+
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to 1 if on MINIX. */
+#undef _MINIX
+
+/* Define to 2 if the system does not provide POSIX.1 features except with
+   this defined. */
+#undef _POSIX_1_SOURCE
+
+/* Define to 1 if you need to in order for `stat' and other things to work. */
+#undef _POSIX_SOURCE
diff --git a/include/erasurecode/erasurecode.h b/include/erasurecode/erasurecode.h
index 755f086..9d2c8a9 100644
--- a/include/erasurecode/erasurecode.h
+++ b/include/erasurecode/erasurecode.h
@@ -41,6 +41,7 @@ extern "C" {
 
 /* liberasurecode API header */
 
+/* Supported EC backends */
 typedef enum {
     EC_BACKEND_NULL             = 0,
     EC_BACKEND_RS_VAND          = 1,
@@ -50,51 +51,69 @@ typedef enum {
     EC_BACKENDS_MAX,
 } ec_backend_id_t;
 
-typedef void * ec_backend_handle_t;
-
-typedef struct ec_backend_ops {
-    int (*init)(void);
-    int (*exit)(void);
-
-    ec_backend_handle_t (*open)(void);
-    void (*close)(ec_backend_handle_t handle);
-
-    int (*encode)(void);
-    int (*decode)(void);
-    int (*reconstruct)(void);
-    int (*get_fragments_needed)(void);
-    int (*get_fragment_metadata)(void);
-    int (*verify_fragment_metadata)(void);
-    int (*verify_stripe_metadata)(void);
-} *ec_backend_ops_t;
-
-typedef struct ec_backend_private {
-        uint32_t flags;
-        /* other common/private EC backend members go here */
-} *ec_backend_private_t;
-
+struct ec_backend_ops {
+    /* Backend register/init, unregister/cleanup routines */
+    int (*init)();
+    int (*exit)();
+
+    /* Generic function pointers to be overridden with dlsym() */
+    /* Do not define these as int (*f)(void) */
+    int (*encode)();
+    int (*decode)();
+    int (*reconstruct)();
+    int (*get_fragments_needed)();
+    int (*get_fragment_metadata)();
+    int (*verify_fragment_metadata)();
+    int (*verify_stripe_metadata)();
+};
 
 #define MAX_BASENAMELEN     64
 #define MAX_LIBNAMELEN      64
 #define MAX_LIBVERLEN       64
-typedef struct ec_backend {
+typedef void * ec_backend_handle_t;
+
+/* EC backend private data */
+struct ec_backend_args {
+    uint32_t k;                                         /* Number of data fragments */
+    uint32_t m;                                         /* Number of parity fragments */
+    uint32_t w;                                         /* Word-size in bits */
+    uint32_t arg1;                                      /* Reserved1 */
+    uint32_t arg2;                                      /* Reserved2 */
+    uint32_t arg3;                                      /* Reserved3 */
+};
+
+/* EC backend common attributes */
+struct ec_backend_common {
     ec_backend_id_t         id;                         /* EC backend id */
     char                    name[MAX_BASENAMELEN];      /* EC backend common name */
     char                    soname[MAX_LIBNAMELEN];     /* EC backend shared library path */
     char                    soversion[MAX_LIBVERLEN];   /* EC backend shared library version */
-    ec_backend_handle_t     handle;                     /* EC backend shared library handle */
     uint8_t                 users;                      /* EC backend number of active references */
 
-    ec_backend_ops_t        ops;                        /* EC backend ops table */
-    ec_backend_private_t    private;                    /* EC backend private data */
+    struct ec_backend_ops * ops;                        /* EC backend ops table */
+};
+
+/* EC backend definition */
+typedef struct ec_backend {
+    struct ec_backend_common    common;                 /* EC backend common attributes */
+    struct ec_backend_args      args;                   /* EC backend instance data (private) */
+    void *                      handle;                 /* EC backend shared library handle */
 
-    SLIST_ENTRY(ec_backend) link;
+    SLIST_ENTRY(ec_backend)     link;
 } *ec_backend_t;
 
+/* API functions */
+int liberasurecode_backend_create_instance(ec_backend_t *pinstance,
+        const char *name, int k, int m, int w, int arg1, int arg2, int arg3);
+int liberasurecode_backend_destroy_instance(ec_backend_t instance);
+
+
 /* Error codes */
 typedef enum {
-    EBACKENDNOTSUPP = 200,
+    EBACKENDNOTSUPP  = 200,
     EECMETHODNOTIMPL = 201,
+    EBACKENDINUSE    = 203,
+    EBACKENDNOTAVAIL = 204,
 } LIBERASURECODE_ERROR_CODES;
 
 #ifdef __cplusplus
diff --git a/include/stamp-h1 b/include/stamp-h1
new file mode 100644
index 0000000..b330768
--- /dev/null
+++ b/include/stamp-h1
@@ -0,0 +1 @@
+timestamp for include/config.h
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..780db29
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,22 @@
+SUBDIRS = builtin/xor_codes
+
+lib_LTLIBRARIES = liberasurecode.la
+
+INCLUDES = \
+		-I$(top_srcdir)/include/erasurecode \
+		-I$(top_srcdir)/include/xor_codes
+
+# liberasurecode params
+liberasurecode_la_SOURCES = \
+		erasurecode.c \
+		utils/chksum/crc32.c \
+		utils/chksum/alg_sig.c \
+		utils/chksum/galois.c \
+		backends/xor/flat_xor_3.c
+
+liberasurecode_la_LIBADD = \
+		builtin/xor_codes/libXorcode.la -lgf_complete
+
+# Version format  (C - A).(A).(R) for C:R:A input
+liberasurecode_la_LDFLAGS = -rpath '$(libdir)' -version-info 9:4:9
+
diff --git a/src/Makefile.in b/src/Makefile.in
new file mode 100644
index 0000000..9efaa57
--- /dev/null
+++ b/src/Makefile.in
@@ -0,0 +1,735 @@
+# Makefile.in generated by automake 1.11.3 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
+# Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
+pkgdatadir = $(datadir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkglibexecdir = $(libexecdir)/@PACKAGE@
+am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd
+install_sh_DATA = $(install_sh) -c -m 644
+install_sh_PROGRAM = $(install_sh) -c
+install_sh_SCRIPT = $(install_sh) -c
+INSTALL_HEADER = $(INSTALL_DATA)
+transform = $(program_transform_name)
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+build_triplet = @build@
+host_triplet = @host@
+subdir = src
+DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_check_compile_flag.m4 \
+	$(top_srcdir)/m4/ax_ext.m4 \
+	$(top_srcdir)/m4/ax_gcc_x86_avx_xgetbv.m4 \
+	$(top_srcdir)/m4/ax_gcc_x86_cpuid.m4 \
+	$(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
+	$(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
+	$(top_srcdir)/m4/lt~obsolete.m4 $(top_srcdir)/configure.ac
+am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
+	$(ACLOCAL_M4)
+mkinstalldirs = $(install_sh) -d
+CONFIG_HEADER = $(top_builddir)/include/config.h
+CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_VPATH_FILES =
+am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
+am__vpath_adj = case $$p in \
+    $(srcdir)/*) f=`echo "$$p" | sed "s|^$$srcdirstrip/||"`;; \
+    *) f=$$p;; \
+  esac;
+am__strip_dir = f=`echo $$p | sed -e 's|^.*/||'`;
+am__install_max = 40
+am__nobase_strip_setup = \
+  srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*|]/\\\\&/g'`
+am__nobase_strip = \
+  for p in $$list; do echo "$$p"; done | sed -e "s|$$srcdirstrip/||"
+am__nobase_list = $(am__nobase_strip_setup); \
+  for p in $$list; do echo "$$p $$p"; done | \
+  sed "s| $$srcdirstrip/| |;"' / .*\//!s/ .*/ ./; s,\( .*\)/[^/]*$$,\1,' | \
+  $(AWK) 'BEGIN { files["."] = "" } { files[$$2] = files[$$2] " " $$1; \
+    if (++n[$$2] == $(am__install_max)) \
+      { print $$2, files[$$2]; n[$$2] = 0; files[$$2] = "" } } \
+    END { for (dir in files) print dir, files[dir] }'
+am__base_list = \
+  sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \
+  sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g'
+am__uninstall_files_from_dir = { \
+  test -z "$$files" \
+    || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \
+    || { echo " ( cd '$$dir' && rm -f" $$files ")"; \
+         $(am__cd) "$$dir" && rm -f $$files; }; \
+  }
+am__installdirs = "$(DESTDIR)$(libdir)"
+LTLIBRARIES = $(lib_LTLIBRARIES)
+liberasurecode_la_DEPENDENCIES = builtin/xor_codes/libXorcode.la
+am__dirstamp = $(am__leading_dot)dirstamp
+am_liberasurecode_la_OBJECTS = erasurecode.lo utils/chksum/crc32.lo \
+	utils/chksum/alg_sig.lo utils/chksum/galois.lo \
+	backends/xor/flat_xor_3.lo
+liberasurecode_la_OBJECTS = $(am_liberasurecode_la_OBJECTS)
+AM_V_lt = $(am__v_lt_@AM_V@)
+am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
+am__v_lt_0 = --silent
+liberasurecode_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC \
+	$(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=link $(CCLD) \
+	$(AM_CFLAGS) $(CFLAGS) $(liberasurecode_la_LDFLAGS) $(LDFLAGS) \
+	-o $@
+DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)/include
+depcomp =
+am__depfiles_maybe =
+COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
+	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) \
+	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
+	$(AM_CFLAGS) $(CFLAGS)
+AM_V_CC = $(am__v_CC_@AM_V@)
+am__v_CC_ = $(am__v_CC_@AM_DEFAULT_V@)
+am__v_CC_0 = @echo "  CC    " $@;
+AM_V_at = $(am__v_at_@AM_V@)
+am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
+am__v_at_0 = @
+CCLD = $(CC)
+LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+	$(AM_LDFLAGS) $(LDFLAGS) -o $@
+AM_V_CCLD = $(am__v_CCLD_@AM_V@)
+am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
+am__v_CCLD_0 = @echo "  CCLD  " $@;
+AM_V_GEN = $(am__v_GEN_@AM_V@)
+am__v_GEN_ = $(am__v_GEN_@AM_DEFAULT_V@)
+am__v_GEN_0 = @echo "  GEN   " $@;
+SOURCES = $(liberasurecode_la_SOURCES)
+DIST_SOURCES = $(liberasurecode_la_SOURCES)
+RECURSIVE_TARGETS = all-recursive check-recursive dvi-recursive \
+	html-recursive info-recursive install-data-recursive \
+	install-dvi-recursive install-exec-recursive \
+	install-html-recursive install-info-recursive \
+	install-pdf-recursive install-ps-recursive install-recursive \
+	installcheck-recursive installdirs-recursive pdf-recursive \
+	ps-recursive uninstall-recursive
+RECURSIVE_CLEAN_TARGETS = mostlyclean-recursive clean-recursive	\
+  distclean-recursive maintainer-clean-recursive
+AM_RECURSIVE_TARGETS = $(RECURSIVE_TARGETS:-recursive=) \
+	$(RECURSIVE_CLEAN_TARGETS:-recursive=) tags TAGS ctags CTAGS \
+	distdir
+ETAGS = etags
+CTAGS = ctags
+DIST_SUBDIRS = $(SUBDIRS)
+DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
+am__relativize = \
+  dir0=`pwd`; \
+  sed_first='s,^\([^/]*\)/.*$$,\1,'; \
+  sed_rest='s,^[^/]*/*,,'; \
+  sed_last='s,^.*/\([^/]*\)$$,\1,'; \
+  sed_butlast='s,/*[^/]*$$,,'; \
+  while test -n "$$dir1"; do \
+    first=`echo "$$dir1" | sed -e "$$sed_first"`; \
+    if test "$$first" != "."; then \
+      if test "$$first" = ".."; then \
+        dir2=`echo "$$dir0" | sed -e "$$sed_last"`/"$$dir2"; \
+        dir0=`echo "$$dir0" | sed -e "$$sed_butlast"`; \
+      else \
+        first2=`echo "$$dir2" | sed -e "$$sed_first"`; \
+        if test "$$first2" = "$$first"; then \
+          dir2=`echo "$$dir2" | sed -e "$$sed_rest"`; \
+        else \
+          dir2="../$$dir2"; \
+        fi; \
+        dir0="$$dir0"/"$$first"; \
+      fi; \
+    fi; \
+    dir1=`echo "$$dir1" | sed -e "$$sed_rest"`; \
+  done; \
+  reldir="$$dir2"
+ACLOCAL = @ACLOCAL@
+AMTAR = @AMTAR@
+AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
+AR = @AR@
+AUTOCONF = @AUTOCONF@
+AUTOHEADER = @AUTOHEADER@
+AUTOMAKE = @AUTOMAKE@
+AWK = @AWK@
+CC = @CC@
+CFLAGS = @CFLAGS@
+CPP = @CPP@
+CPPFLAGS = @CPPFLAGS@
+CXX = @CXX@
+CXXCPP = @CXXCPP@
+CXXFLAGS = @CXXFLAGS@
+CYGPATH_W = @CYGPATH_W@
+DEFS = @DEFS@
+DLLTOOL = @DLLTOOL@
+DSYMUTIL = @DSYMUTIL@
+DUMPBIN = @DUMPBIN@
+ECHO_C = @ECHO_C@
+ECHO_N = @ECHO_N@
+ECHO_T = @ECHO_T@
+EGREP = @EGREP@
+EXEEXT = @EXEEXT@
+FGREP = @FGREP@
+GREP = @GREP@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LIBOBJS = @LIBOBJS@
+LIBS = @LIBS@
+LIBTOOL = @LIBTOOL@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LTLIBOBJS = @LTLIBOBJS@
+MAINT = @MAINT@
+MAKEINFO = @MAKEINFO@
+MANIFEST_TOOL = @MANIFEST_TOOL@
+MKDIR_P = @MKDIR_P@
+NM = @NM@
+NMEDIT = @NMEDIT@
+OBJDUMP = @OBJDUMP@
+OBJECTS = @OBJECTS@
+OBJEXT = @OBJEXT@
+OTOOL = @OTOOL@
+OTOOL64 = @OTOOL64@
+PACKAGE = @PACKAGE@
+PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
+PACKAGE_NAME = @PACKAGE_NAME@
+PACKAGE_STRING = @PACKAGE_STRING@
+PACKAGE_TARNAME = @PACKAGE_TARNAME@
+PACKAGE_URL = @PACKAGE_URL@
+PACKAGE_VERSION = @PACKAGE_VERSION@
+PATH_SEPARATOR = @PATH_SEPARATOR@
+RANLIB = @RANLIB@
+SED = @SED@
+SET_MAKE = @SET_MAKE@
+SHELL = @SHELL@
+SIMD_FLAGS = @SIMD_FLAGS@
+STRIP = @STRIP@
+VERSION = @VERSION@
+abs_builddir = @abs_builddir@
+abs_srcdir = @abs_srcdir@
+abs_top_builddir = @abs_top_builddir@
+abs_top_srcdir = @abs_top_srcdir@
+ac_aux_dir = @ac_aux_dir@
+ac_ct_AR = @ac_ct_AR@
+ac_ct_CC = @ac_ct_CC@
+ac_ct_CXX = @ac_ct_CXX@
+ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
+am__leading_dot = @am__leading_dot@
+am__tar = @am__tar@
+am__untar = @am__untar@
+bindir = @bindir@
+build = @build@
+build_alias = @build_alias@
+build_cpu = @build_cpu@
+build_os = @build_os@
+build_vendor = @build_vendor@
+builddir = @builddir@
+datadir = @datadir@
+datarootdir = @datarootdir@
+docdir = @docdir@
+dvidir = @dvidir@
+exec_prefix = @exec_prefix@
+host = @host@
+host_alias = @host_alias@
+host_cpu = @host_cpu@
+host_os = @host_os@
+host_vendor = @host_vendor@
+htmldir = @htmldir@
+includedir = @includedir@
+infodir = @infodir@
+install_sh = @install_sh@
+libdir = @libdir@
+libexecdir = @libexecdir@
+localedir = @localedir@
+localstatedir = @localstatedir@
+mandir = @mandir@
+mkdir_p = @mkdir_p@
+oldincludedir = @oldincludedir@
+pdfdir = @pdfdir@
+prefix = @prefix@
+program_transform_name = @program_transform_name@
+psdir = @psdir@
+sbindir = @sbindir@
+sharedstatedir = @sharedstatedir@
+srcdir = @srcdir@
+sysconfdir = @sysconfdir@
+target_alias = @target_alias@
+top_build_prefix = @top_build_prefix@
+top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
+SUBDIRS = builtin/xor_codes
+lib_LTLIBRARIES = liberasurecode.la
+INCLUDES = \
+		-I$(top_srcdir)/include/erasurecode \
+		-I$(top_srcdir)/include/xor_codes
+
+
+# liberasurecode params
+liberasurecode_la_SOURCES = \
+		erasurecode.c \
+		utils/chksum/crc32.c \
+		utils/chksum/alg_sig.c \
+		utils/chksum/galois.c \
+		backends/xor/flat_xor_3.c
+
+liberasurecode_la_LIBADD = \
+		builtin/xor_codes/libXorcode.la -lgf_complete
+
+
+# Version format  (C - A).(A).(R) for C:R:A input
+liberasurecode_la_LDFLAGS = -rpath '$(libdir)' -version-info 9:4:9
+all: all-recursive
+
+.SUFFIXES:
+.SUFFIXES: .c .lo .o .obj
+$(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu --ignore-deps src/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu --ignore-deps src/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
+	    cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe);; \
+	esac;
+
+$(top_builddir)/config.status: $(top_srcdir)/configure $(CONFIG_STATUS_DEPENDENCIES)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+
+$(top_srcdir)/configure: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(ACLOCAL_M4): @MAINTAINER_MODE_TRUE@ $(am__aclocal_m4_deps)
+	cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh
+$(am__aclocal_m4_deps):
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+	@$(NORMAL_INSTALL)
+	test -z "$(libdir)" || $(MKDIR_P) "$(DESTDIR)$(libdir)"
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	list2=; for p in $$list; do \
+	  if test -f $$p; then \
+	    list2="$$list2 $$p"; \
+	  else :; fi; \
+	done; \
+	test -z "$$list2" || { \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(libdir)"; \
+	}
+
+uninstall-libLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(libdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(libdir)/$$f"; \
+	done
+
+clean-libLTLIBRARIES:
+	-test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+	@list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+utils/chksum/$(am__dirstamp):
+	@$(MKDIR_P) utils/chksum
+	@: > utils/chksum/$(am__dirstamp)
+utils/chksum/crc32.lo: utils/chksum/$(am__dirstamp)
+utils/chksum/alg_sig.lo: utils/chksum/$(am__dirstamp)
+utils/chksum/galois.lo: utils/chksum/$(am__dirstamp)
+backends/xor/$(am__dirstamp):
+	@$(MKDIR_P) backends/xor
+	@: > backends/xor/$(am__dirstamp)
+backends/xor/flat_xor_3.lo: backends/xor/$(am__dirstamp)
+liberasurecode.la: $(liberasurecode_la_OBJECTS) $(liberasurecode_la_DEPENDENCIES) $(EXTRA_liberasurecode_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(liberasurecode_la_LINK) -rpath $(libdir) $(liberasurecode_la_OBJECTS) $(liberasurecode_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+	-rm -f backends/xor/flat_xor_3.$(OBJEXT)
+	-rm -f backends/xor/flat_xor_3.lo
+	-rm -f utils/chksum/alg_sig.$(OBJEXT)
+	-rm -f utils/chksum/alg_sig.lo
+	-rm -f utils/chksum/crc32.$(OBJEXT)
+	-rm -f utils/chksum/crc32.lo
+	-rm -f utils/chksum/galois.$(OBJEXT)
+	-rm -f utils/chksum/galois.lo
+
+distclean-compile:
+	-rm -f *.tab.c
+
+.c.o:
+	$(AM_V_CC)$(COMPILE) -c -o $@ $<
+
+.c.obj:
+	$(AM_V_CC)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+
+.c.lo:
+	$(AM_V_CC)$(LTCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+	-rm -rf backends/xor/.libs backends/xor/_libs
+	-rm -rf utils/chksum/.libs utils/chksum/_libs
+
+# This directory's subdirectories are mostly independent; you can cd
+# into them and run `make' without going through this Makefile.
+# To change the values of `make' variables: instead of editing Makefiles,
+# (1) if the variable is set in `config.status', edit `config.status'
+#     (which will cause the Makefiles to be regenerated when you run `make');
+# (2) otherwise, pass the desired values on the `make' command line.
+$(RECURSIVE_TARGETS):
+	@fail= failcom='exit 1'; \
+	for f in x $$MAKEFLAGS; do \
+	  case $$f in \
+	    *=* | --[!k]*);; \
+	    *k*) failcom='fail=yes';; \
+	  esac; \
+	done; \
+	dot_seen=no; \
+	target=`echo $@ | sed s/-recursive//`; \
+	list='$(SUBDIRS)'; for subdir in $$list; do \
+	  echo "Making $$target in $$subdir"; \
+	  if test "$$subdir" = "."; then \
+	    dot_seen=yes; \
+	    local_target="$$target-am"; \
+	  else \
+	    local_target="$$target"; \
+	  fi; \
+	  ($(am__cd) $$subdir && $(MAKE) $(AM_MAKEFLAGS) $$local_target) \
+	  || eval $$failcom; \
+	done; \
+	if test "$$dot_seen" = "no"; then \
+	  $(MAKE) $(AM_MAKEFLAGS) "$$target-am" || exit 1; \
+	fi; test -z "$$fail"
+
+$(RECURSIVE_CLEAN_TARGETS):
+	@fail= failcom='exit 1'; \
+	for f in x $$MAKEFLAGS; do \
+	  case $$f in \
+	    *=* | --[!k]*);; \
+	    *k*) failcom='fail=yes';; \
+	  esac; \
+	done; \
+	dot_seen=no; \
+	case "$@" in \
+	  distclean-* | maintainer-clean-*) list='$(DIST_SUBDIRS)' ;; \
+	  *) list='$(SUBDIRS)' ;; \
+	esac; \
+	rev=''; for subdir in $$list; do \
+	  if test "$$subdir" = "."; then :; else \
+	    rev="$$subdir $$rev"; \
+	  fi; \
+	done; \
+	rev="$$rev ."; \
+	target=`echo $@ | sed s/-recursive//`; \
+	for subdir in $$rev; do \
+	  echo "Making $$target in $$subdir"; \
+	  if test "$$subdir" = "."; then \
+	    local_target="$$target-am"; \
+	  else \
+	    local_target="$$target"; \
+	  fi; \
+	  ($(am__cd) $$subdir && $(MAKE) $(AM_MAKEFLAGS) $$local_target) \
+	  || eval $$failcom; \
+	done && test -z "$$fail"
+tags-recursive:
+	list='$(SUBDIRS)'; for subdir in $$list; do \
+	  test "$$subdir" = . || ($(am__cd) $$subdir && $(MAKE) $(AM_MAKEFLAGS) tags); \
+	done
+ctags-recursive:
+	list='$(SUBDIRS)'; for subdir in $$list; do \
+	  test "$$subdir" = . || ($(am__cd) $$subdir && $(MAKE) $(AM_MAKEFLAGS) ctags); \
+	done
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS: tags-recursive $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	if ($(ETAGS) --etags-include --version) >/dev/null 2>&1; then \
+	  include_option=--etags-include; \
+	  empty_fix=.; \
+	else \
+	  include_option=--include; \
+	  empty_fix=; \
+	fi; \
+	list='$(SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    test ! -f $$subdir/TAGS || \
+	      set "$$@" "$$include_option=$$here/$$subdir/TAGS"; \
+	  fi; \
+	done; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS: ctags-recursive $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
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+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
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+			   sort -u` ;; \
+	esac; \
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+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    test -d "$(distdir)/$$subdir" \
+	    || $(MKDIR_P) "$(distdir)/$$subdir" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    dir1=$$subdir; dir2="$(distdir)/$$subdir"; \
+	    $(am__relativize); \
+	    new_distdir=$$reldir; \
+	    dir1=$$subdir; dir2="$(top_distdir)"; \
+	    $(am__relativize); \
+	    new_top_distdir=$$reldir; \
+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
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+		am__skip_mode_fix=: \
+	        distdir) \
+	      || exit 1; \
+	  fi; \
+	done
+check-am: all-am
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+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
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+
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+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
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+	-rm -f utils/chksum/$(am__dirstamp)
+
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+	@echo "it deletes files that may require special tools to rebuild."
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+
+clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
+	mostlyclean-am
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+	-rm -f Makefile
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diff --git a/src/backends/xor/flat_xor_3.c b/src/backends/xor/flat_xor_3.c
index 7ad14bc..6428465 100644
--- a/src/backends/xor/flat_xor_3.c
+++ b/src/backends/xor/flat_xor_3.c
@@ -24,6 +24,10 @@
 
 #include "erasurecode.h"
 
+/* Forward declarations */
+struct ec_backend_ops flat_xor_3_ops;
+struct ec_backend flat_xor_3;
+
 static int flat_xor_3_encode()
 {
 }
@@ -52,19 +56,17 @@ static int flat_xor_3_verify_stripe_metadata()
 {
 }
 
-static ec_backend_handle_t flat_xor_3_open(void)
+static int flat_xor_3_init()
 {
-    
 }
 
-static void flat_xor_3_close(ec_backend_handle_t handle)
+static int flat_xor_3_exit()
 {
-    
 }
 
 struct ec_backend_ops flat_xor_3_ops = {
-    .open                       = flat_xor_3_open,
-    .close                      = flat_xor_3_close,
+    .init                       = flat_xor_3_init,
+    .exit                       = flat_xor_3_exit,
     .encode                     = flat_xor_3_encode,
     .decode                     = flat_xor_3_decode,
     .reconstruct                = flat_xor_3_reconstruct,
@@ -74,22 +76,12 @@ struct ec_backend_ops flat_xor_3_ops = {
     .verify_stripe_metadata     = flat_xor_3_verify_stripe_metadata,
 };
 
-struct ec_backend flat_xor_3 = {
-    .id                 = EC_BACKEND_FLAT_XOR_3,
-    .name               = "flat_xor_3",
-    .soname             = "Xorcode",
-    .soversion          = "1.0",
-    .handle             = NULL,
-    .ops                = &flat_xor_3_ops,
+struct ec_backend_common backend_flat_xor_3 = {
+    .id                         = EC_BACKEND_FLAT_XOR_3,
+    .name                       = "flat_xor_3",
+    .soname                     = "libXorcode.so",
+    .soversion                  = "1.0",
+    .users                      = 0,
+    .ops                        = &flat_xor_3_ops,
 };
 
-static int flat_xor_3_init(void)
-{
-    return liberasurecode_backend_register(&flat_xor_3);
-}
-
-static int flat_xor_3_exit(void)
-{
-    return liberasurecode_backend_unregister(&flat_xor_3);
-}
-
diff --git a/src/builtin/xor_codes/Makefile.in b/src/builtin/xor_codes/Makefile.in
new file mode 100644
index 0000000..9912c8c
--- /dev/null
+++ b/src/builtin/xor_codes/Makefile.in
@@ -0,0 +1,550 @@
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+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
+# Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+@SET_MAKE@
+
+VPATH = @srcdir@
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+	  *config.status*) \
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+	done; \
+	test -z "$$list2" || { \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 '$(DESTDIR)$(libdir)'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL) $(INSTALL_STRIP_FLAG) $$list2 "$(DESTDIR)$(libdir)"; \
+	}
+
+uninstall-libLTLIBRARIES:
+	@$(NORMAL_UNINSTALL)
+	@list='$(lib_LTLIBRARIES)'; test -n "$(libdir)" || list=; \
+	for p in $$list; do \
+	  $(am__strip_dir) \
+	  echo " $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f '$(DESTDIR)$(libdir)/$$f'"; \
+	  $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=uninstall rm -f "$(DESTDIR)$(libdir)/$$f"; \
+	done
+
+clean-libLTLIBRARIES:
+	-test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+	@list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+	  dir="`echo $$p | sed -e 's|/[^/]*$$||'`"; \
+	  test "$$dir" != "$$p" || dir=.; \
+	  echo "rm -f \"$${dir}/so_locations\""; \
+	  rm -f "$${dir}/so_locations"; \
+	done
+libXorcode.la: $(libXorcode_la_OBJECTS) $(libXorcode_la_DEPENDENCIES) $(EXTRA_libXorcode_la_DEPENDENCIES) 
+	$(AM_V_CCLD)$(libXorcode_la_LINK) -rpath $(libdir) $(libXorcode_la_OBJECTS) $(libXorcode_la_LIBADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+.c.o:
+	$(AM_V_CC)$(COMPILE) -c -o $@ $<
+
+.c.obj:
+	$(AM_V_CC)$(COMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
+
+.c.lo:
+	$(AM_V_CC)$(LTCOMPILE) -c -o $@ $<
+
+libXorcode_la-xor_code.lo: xor_code.c
+	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libXorcode_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libXorcode_la-xor_code.lo `test -f 'xor_code.c' || echo '$(srcdir)/'`xor_code.c
+
+libXorcode_la-xor_hd_code.lo: xor_hd_code.c
+	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libXorcode_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libXorcode_la-xor_hd_code.lo `test -f 'xor_hd_code.c' || echo '$(srcdir)/'`xor_hd_code.c
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	mkid -fID $$unique
+tags: TAGS
+
+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	set x; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: CTAGS
+CTAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
+		$(TAGS_FILES) $(LISP)
+	list='$(SOURCES) $(HEADERS)  $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
+	  done | \
+	  $(AWK) '{ files[$$0] = 1; nonempty = 1; } \
+	      END { if (nonempty) { for (i in files) print i; }; }'`; \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+
+distdir: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+	for dir in "$(DESTDIR)$(libdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
+	mostlyclean-am
+
+distclean: distclean-am
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libLTLIBRARIES
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libLTLIBRARIES clean-libtool ctags distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am \
+	install-libLTLIBRARIES install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags uninstall uninstall-am uninstall-libLTLIBRARIES
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/erasurecode.c b/src/erasurecode.c
new file mode 100644
index 0000000..a26d42b
--- /dev/null
+++ b/src/erasurecode.c
@@ -0,0 +1,238 @@
+/* 
+ * <Copyright>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice, this
+ * list of conditions and the following disclaimer in the documentation and/or
+ * other materials provided with the distribution.  THIS SOFTWARE IS PROVIDED BY
+ * THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "erasurecode.h"
+#include "erasurecode_internal.h"
+#include "list.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+/* EC backend references */
+extern struct ec_backend_common backend_flat_xor_3;
+
+ec_backend_t ec_backends_supported[EC_BACKENDS_MAX] = {
+    /* backend_null */ NULL,
+    /* backend_rs_vand */ NULL,
+    /* backend_rs_cauchy_orig */ NULL,
+    (ec_backend_t) &backend_flat_xor_3,
+    /* backend_flat_xor_4 */ NULL,
+};
+
+/* Registered erasure code backend instances */
+SLIST_HEAD(backend_list, ec_backend) active_instances =
+    SLIST_HEAD_INITIALIZER(active_instances);
+pthread_mutex_t active_instances_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+int liberasurecode_backend_instance_register(ec_backend_t instance)
+{
+    pthread_mutex_lock(&active_instances_mutex);
+    SLIST_INSERT_HEAD(&active_instances, instance, link);
+    pthread_mutex_unlock(&active_instances_mutex);
+
+    return 0;
+}
+
+int liberasurecode_backend_instance_unregister(ec_backend_t instance)
+{
+    pthread_mutex_lock(&active_instances_mutex);
+    SLIST_REMOVE(&active_instances, instance, ec_backend, link);
+    pthread_mutex_unlock(&active_instances_mutex);
+
+    return 0;
+}
+
+/* Get EC backend by name */
+ec_backend_t liberasurecode_backend_lookup_by_name(const char *name)
+{
+    int b = 0;
+
+    for (b = 0; b < EC_BACKENDS_MAX; ++b) {
+        if (!strcmp(ec_backends_supported[b]->common.name, name))
+            return ec_backends_supported[b];
+    }
+
+    return NULL;
+}
+
+/* Name to ID mapping for EC backend */
+ec_backend_id_t liberasurecode_backend_lookup_id(const char *name)
+{
+    int b = 0;
+
+    for (b = 0; b < EC_BACKENDS_MAX; ++b) {
+        ec_backend_t backend = ec_backends_supported[b];
+        if (backend && !strcmp(backend->common.name, name))
+            return backend->common.id;
+    }
+
+    return -1;
+}
+
+/* Check if a backend name is in the supported list */
+int liberasurecode_backend_supported(const char *name)
+{
+    return (liberasurecode_backend_lookup_by_name(name) != NULL);
+}
+
+/* Generic dlopen/dlclose routines */
+int liberasurecode_backend_open(ec_backend_t instance)
+{
+	void *handle = NULL;
+    if (instance && NULL != instance->handle)
+        return 0;
+
+    /* Use RTLD_LOCAL to avoid symbol collisions */
+    instance->handle = dlopen(instance->common.soname, RTLD_LAZY | RTLD_LOCAL);
+    if (NULL == instance->handle) {
+        fprintf(stderr, "%s\n", dlerror());
+        return -EBACKENDNOTAVAIL;
+    }
+
+    dlerror();    /* Clear any existing errors */
+    return 0;
+}
+
+int liberasurecode_backend_close(ec_backend_t instance)
+{
+    if (NULL == instance || NULL == instance->handle)
+        return 0;
+
+    dlclose(instance->handle);
+    dlerror();    /* Clear any existing errors */
+
+    instance->handle = NULL;
+    return 0;
+}
+
+/* Initialize and open a backend - pointer to backend instance
+ * returned in 'pinstance.' */
+int liberasurecode_backend_create_instance(
+        ec_backend_t *pinstance,
+        const char *name, int k, int m, int w,
+        int arg1, int arg2, int arg3)
+{
+    int err = 0;
+    ec_backend_t instance = NULL;
+    struct ec_backend_args args = {
+        .k = k, .m = m, .w = w,
+        .arg1 = arg1, .arg2 = arg2, .arg3 = arg3,
+    };
+
+    ec_backend_id_t id = liberasurecode_backend_lookup_id(name);
+    if (-1 == id)
+        return -EBACKENDNOTSUPP;
+
+    /* Allocate memory for ec_backend instance */
+    instance = calloc(1, sizeof(*instance));
+    if (NULL == instance)
+        return -ENOMEM;
+
+    /* Copy common backend, args struct */
+    instance->common = ec_backends_supported[id]->common;
+    instance->args = args;
+
+    /* Open backend .so if not already open */
+    /* backend handle is returned in backend->handle */
+    err = liberasurecode_backend_open(instance);
+    if (err < 0) {
+        /* ignore during init, return the same handle */
+        free(instance);
+        *pinstance = NULL;
+        return err;
+    }
+
+    /* Call private init() for the backend */
+    instance->common.ops->init();
+
+    /* Register instance */
+    liberasurecode_backend_instance_register(instance);
+
+    *pinstance = instance;
+
+    return 0;
+}
+
+/* deinitialize and close a backend */
+int liberasurecode_backend_destroy_instance(ec_backend_t instance)
+{
+    liberasurecode_backend_close(instance);
+    liberasurecode_backend_instance_unregister(instance);
+    free(instance);
+}
+
+#if 0
+/* Validate backend before calling init */
+int liberasurecode_backend_validate(ec_backend_t backend)
+{
+    /* Verify that the backend implements all required methods */
+}
+
+/* FIXME - do we need to use reference counts if we are creating
+* a new instance per user */
+
+/* Get a reference to an EC backend */
+ec_backend_t liberasurecode_backend_get(const char *name)
+{
+    ec_backend_t b = liberasurecode_backend_lookup_by_name(name);
+    if (NULL != b)
+        ++b->users;
+    return b;
+}
+
+/* Drop an EC backend reference held */
+void liberasurecode_backend_put(ec_backend_t backend)
+{
+    if (backend->users > 0)
+        --backend->users;
+}
+
+/* Query interface for active instances */
+ec_backend_t liberasurecode_backend_instance_active(ec_backend_t instance)
+{
+    ec_backend_t b;
+
+    SLIST_FOREACH(b, &active_instances, link) {
+        if (strcmp(b->name, name) == 0)
+            return b;
+    }
+
+    return NULL;
+}
+
+ec_backend_t liberasurecode_backend_lookup_by_soname(const char *soname)
+{
+    ec_backend_t b;
+
+    SLIST_FOREACH(b, &active_instances, link) {
+        if (strcmp(b->soname, soname) == 0)
+            return b;
+    }
+
+    return NULL;
+}
+#endif
+
+
diff --git a/src/main.c b/src/main.c
deleted file mode 100644
index 864b81d..0000000
--- a/src/main.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/* 
- * <Copyright>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following disclaimer.
- *
- * Redistributions in binary form must reproduce the above copyright notice, this
- * list of conditions and the following disclaimer in the documentation and/or
- * other materials provided with the distribution.  THIS SOFTWARE IS PROVIDED BY
- * THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
- * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "erasurecode.h"
-#include "erasurecode_internal.h"
-#include "list.h"
-
-#include <pthread.h>
-
-/* Registered erasure code backends */
-SLIST_HEAD(backend_list, ec_backend) registered_backends =
-    SLIST_HEAD_INITIALIZER(registered_backends);
-pthread_mutex_t registered_backends_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-/* Add erasurecode backend to the supported backends list */
-int liberasurecode_backend_register(ec_backend_t backend)
-{
-    pthread_mutex_lock(&registered_backends_mutex);
-    SLIST_INSERT_HEAD(&registered_backends, backend, link);
-    pthread_mutex_unlock(&registered_backends_mutex);
-}
-
-/* Remove erasurecode backend from the supported backends list */
-int liberasurecode_backend_unregister(ec_backend_t backend)
-{
-    pthread_mutex_lock(&registered_backends_mutex);
-    SLIST_REMOVE(&registered_backends, backend, ec_backend, link);
-    pthread_mutex_unlock(&registered_backends_mutex);
-}
-
-/* Backend query interfaces */
-ec_backend_t liberasurecode_backend_get_by_name(const char *name)
-{
-    ec_backend_t b;
-
-    SLIST_FOREACH(b, &registered_backends, link) {
-        if (strcmp(b->name, name) == 0) {
-            ++b->users;
-            return b;
-        }
-    }
-
-    return NULL;
-}
-
-ec_backend_t liberasurecode_backend_get_by_soname(const char *soname)
-{
-    ec_backend_t b;
-
-    SLIST_FOREACH(b, &registered_backends, link) {
-        if (strcmp(b->soname, soname) == 0) {
-            ++b->users;
-            return b;
-        }
-    }
-
-    return NULL;
-}
-
-void liberasurecode_backend_put(ec_backend_t backend)
-{
-    if (backend->users > 0)
-        --backend->users;
-}
-
-int liberasurecode_backend_supported(const char *name)
-{
-    return (liberasurecode_backend_get_by_name(name) != NULL);
-}
-
-/* Validate backend before calling init */
-int validate_backend(ec_backend_t backend)
-{
-    /* Verify that the backend implements all required methods */
-}
-
-/* Try to register all supported backends */
-int liberasurecode_backend_init_all(ec_backend_t backend)
-{
-    // FIXME - implement init table for other backend init methods
-    // for now, init just the xor backend
-}
-
diff --git a/test/Makefile.am b/test/Makefile.am
index bfa8a8f..5d82389 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -1,16 +1,20 @@
+noinst_HEADERS = builtin/xor_codes/test_xor_hd_code.h
+noinst_PROGRAMS = test_xor_hd_code alg_sig_test liberasurecode_test
+
 test_xor_hd_code_SOURCES = \
 	builtin/xor_codes/test_xor_hd_code.c \
 	builtin/xor_codes/test_xor_hd_code.h
 test_xor_hd_code_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/include/erasurecode -I$(top_srcdir)/include/xor_codes
-test_xor_hd_code_LDFLAGS = -lerasurecode -lgf_complete $(top_srcdir)/src/builtin/xor_codes/libXorcode.la
+test_xor_hd_code_LDFLAGS = -static-libtool-libs -lgf_complete $(top_srcdir)/src/liberasurecode.la $(top_srcdir)/src/builtin/xor_codes/libXorcode.la
 check_PROGRAMS = test_xor_hd_code
 
 alg_sig_test_SOURCES = utils/chksum/test_alg_sig.c
 alg_sig_test_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/include/erasurecode -I$(top_srcdir)/include/xor_codes
-alg_sig_test_LDFLAGS = -lerasurecode -lgf_complete $(top_srcdir)/src/builtin/xor_codes/libXorcode.la
+alg_sig_test_LDFLAGS = -static-libtool-libs $(top_srcdir)/src/liberasurecode.la -lgf_complete -ldl
 check_PROGRAMS += alg_sig_test
 
-noinst_HEADERS = builtin/xor_codes/test_xor_hd_code.h
-noinst_PROGRAMS = test_xor_hd_code alg_sig_test
-
+liberasurecode_test_SOURCES = liberasurecode_test.c
+liberasurecode_test_CPPFLAGS = -I$(top_srcdir)/include -I$(top_srcdir)/include/erasurecode
+liberasurecode_test_LDFLAGS = -static -lgf_complete $(top_srcdir)/src/liberasurecode.la -ldl
+check_PROGRAMS += liberasurecode_test
 
diff --git a/test/liberasurecode_test.c b/test/liberasurecode_test.c
new file mode 100644
index 0000000..77344fc
--- /dev/null
+++ b/test/liberasurecode_test.c
@@ -0,0 +1,13 @@
+#include "erasurecode.h"
+
+int main()
+{
+    ec_backend_t backend;
+    
+    int err = liberasurecode_backend_create_instance(&backend, 
+            "flat_xor_3", 10, 4, 0, 0, 0, 0);
+    if (backend)
+        liberasurecode_backend_destroy_instance(backend);
+    return 0;
+}
+