From d318ebdd469e8868cc7300d310cb8c821e75dc4c Mon Sep 17 00:00:00 2001
From: roentgen <fukasawa666@gmail.com>
Date: Fri, 9 Nov 2018 21:30:36 +0900
Subject: [PATCH 01/18] fixed may cause SEGV if EC used in among threads
 despite using the glob-lock

---
 install_deps.sh | 9 ++++-----
 src/lib.rs      | 4 ----
 2 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/install_deps.sh b/install_deps.sh
index 2f49927..e359f59 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -25,9 +25,9 @@ cd ../
 #
 # jerasure
 #
-git clone https://github.com/ceph/jerasure.git
+git clone https://github.com/roentgen/jerasure.git
 cd jerasure/
-git checkout de1739c
+git checkout 87f052e 
 autoreconf --force --install
 CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --enable-static --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
@@ -36,14 +36,13 @@ cd ../
 #
 # liberasurecode
 #
-git clone https://github.com/openstack/liberasurecode.git
+git clone https://github.com/roentgen/liberasurecode.git
 cd liberasurecode/
-git checkout 1.5.0
+git checkout 8331347
 ./autogen.sh
 CFLAGS="-I${BUILD_DIR}/jerasure/include -I${BUILD_DIR}/include"
 if [ "$(uname)" == "Darwin" ]; then
     CFLAGS="$CFLAGS -Wno-error=address-of-packed-member"
 fi
 CFLAGS=$CFLAGS LIBS="-lJerasure" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --with-pic --prefix $BUILD_DIR
-patch -p1 < ../liberasurecode.patch # Applies a patch for building static library
 make $MAKE_FLAGS install
diff --git a/src/lib.rs b/src/lib.rs
index 928788d..3366715 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -171,10 +171,6 @@ impl Builder {
                     parity_fragments: self.parity_fragments,
                     desc,
                 }).map_err(Error::from_error_code)?;
-
-            // `SIGSEGV` may be raised if encodings are executed (in parallel) immediately after creation.
-            // To prevent it, sleeps the current thread for a little while.
-            std::thread::sleep(Duration::from_millis(10));
             Ok(coder)
         })
     }

From 3c34cb0d8c64d6979b85866621e283e539c981fc Mon Sep 17 00:00:00 2001
From: roentgen <fukasawa666@gmail.com>
Date: Fri, 9 Nov 2018 21:30:36 +0900
Subject: [PATCH 02/18] fixed may cause SEGV if EC used in among threads
 despite using the glob-lock

---
 install_deps.sh | 9 ++++-----
 src/lib.rs      | 4 ----
 2 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/install_deps.sh b/install_deps.sh
index 2f49927..e359f59 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -25,9 +25,9 @@ cd ../
 #
 # jerasure
 #
-git clone https://github.com/ceph/jerasure.git
+git clone https://github.com/roentgen/jerasure.git
 cd jerasure/
-git checkout de1739c
+git checkout 87f052e 
 autoreconf --force --install
 CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --enable-static --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
@@ -36,14 +36,13 @@ cd ../
 #
 # liberasurecode
 #
-git clone https://github.com/openstack/liberasurecode.git
+git clone https://github.com/roentgen/liberasurecode.git
 cd liberasurecode/
-git checkout 1.5.0
+git checkout 8331347
 ./autogen.sh
 CFLAGS="-I${BUILD_DIR}/jerasure/include -I${BUILD_DIR}/include"
 if [ "$(uname)" == "Darwin" ]; then
     CFLAGS="$CFLAGS -Wno-error=address-of-packed-member"
 fi
 CFLAGS=$CFLAGS LIBS="-lJerasure" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --with-pic --prefix $BUILD_DIR
-patch -p1 < ../liberasurecode.patch # Applies a patch for building static library
 make $MAKE_FLAGS install
diff --git a/src/lib.rs b/src/lib.rs
index 928788d..3366715 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -171,10 +171,6 @@ impl Builder {
                     parity_fragments: self.parity_fragments,
                     desc,
                 }).map_err(Error::from_error_code)?;
-
-            // `SIGSEGV` may be raised if encodings are executed (in parallel) immediately after creation.
-            // To prevent it, sleeps the current thread for a little while.
-            std::thread::sleep(Duration::from_millis(10));
             Ok(coder)
         })
     }

From c33931ede9aa3abc972283cd0045c1a18c4cae0e Mon Sep 17 00:00:00 2001
From: roentgen <fukasawa666@gmail.com>
Date: Thu, 15 Nov 2018 21:17:35 +0900
Subject: [PATCH 03/18] heading for the frugalos/* repository

---
 install_deps.sh | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/install_deps.sh b/install_deps.sh
index e359f59..f353f33 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -25,9 +25,9 @@ cd ../
 #
 # jerasure
 #
-git clone https://github.com/roentgen/jerasure.git
+git clone https://github.com/frugalos/jerasure.git
 cd jerasure/
-git checkout 87f052e 
+git checkout c9851639f4830e516e48797832ec30fe82a43e28
 autoreconf --force --install
 CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --enable-static --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
@@ -36,13 +36,13 @@ cd ../
 #
 # liberasurecode
 #
-git clone https://github.com/roentgen/liberasurecode.git
-cd liberasurecode/
-git checkout 8331347
+git clone https://github.com/frugalos/openstack_liberasurecode.git
+cd openstack_liberasurecode/
+git checkout 240333686eeae71ea1b94669242a8a6f4f51e260
 ./autogen.sh
 CFLAGS="-I${BUILD_DIR}/jerasure/include -I${BUILD_DIR}/include"
 if [ "$(uname)" == "Darwin" ]; then
     CFLAGS="$CFLAGS -Wno-error=address-of-packed-member"
 fi
-CFLAGS=$CFLAGS LIBS="-lJerasure" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --with-pic --prefix $BUILD_DIR
+CFLAGS=$CFLAGS LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install

From 6d9b740ca9c52ee1d2536b93f939a26b9e6b6aa3 Mon Sep 17 00:00:00 2001
From: roentgen <fukasawa666@gmail.com>
Date: Thu, 15 Nov 2018 22:57:16 +0900
Subject: [PATCH 04/18] fixed merge break

---
 install_deps.sh | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/install_deps.sh b/install_deps.sh
index 429e856..f353f33 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -44,9 +44,5 @@ CFLAGS="-I${BUILD_DIR}/jerasure/include -I${BUILD_DIR}/include"
 if [ "$(uname)" == "Darwin" ]; then
     CFLAGS="$CFLAGS -Wno-error=address-of-packed-member"
 fi
-<<<<<<< HEAD
 CFLAGS=$CFLAGS LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --with-pic --prefix $BUILD_DIR
-=======
-CFLAGS=$CFLAGS LIBS="-lJerasure" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --with-pic --prefix $BUILD_DIR
->>>>>>> d318ebdd469e8868cc7300d310cb8c821e75dc4c
 make $MAKE_FLAGS install

From 8d6a73b0c41407c9da75529a895111cef0bc5ad9 Mon Sep 17 00:00:00 2001
From: roentgen <fukasawa666@gmail.com>
Date: Thu, 15 Nov 2018 23:50:03 +0900
Subject: [PATCH 05/18] enabled shared for libJerasure.so

---
 install_deps.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/install_deps.sh b/install_deps.sh
index f353f33..c551715 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -29,8 +29,9 @@ git clone https://github.com/frugalos/jerasure.git
 cd jerasure/
 git checkout c9851639f4830e516e48797832ec30fe82a43e28
 autoreconf --force --install
-CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --enable-static --with-pic --prefix $BUILD_DIR
+CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --enable-shared --enable-static --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
+ldconfig
 cd ../
 
 #

From 3d9aeb88fa73f3c6da377e6590086010a81b1d22 Mon Sep 17 00:00:00 2001
From: roentgen <fukasawa666@gmail.com>
Date: Fri, 16 Nov 2018 18:02:13 +0900
Subject: [PATCH 06/18] changed revision

---
 install_deps.sh | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/install_deps.sh b/install_deps.sh
index c551715..9ca8e23 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -27,11 +27,10 @@ cd ../
 #
 git clone https://github.com/frugalos/jerasure.git
 cd jerasure/
-git checkout c9851639f4830e516e48797832ec30fe82a43e28
+git checkout threadsafe
 autoreconf --force --install
 CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --enable-shared --enable-static --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
-ldconfig
 cd ../
 
 #
@@ -39,7 +38,7 @@ cd ../
 #
 git clone https://github.com/frugalos/openstack_liberasurecode.git
 cd openstack_liberasurecode/
-git checkout 240333686eeae71ea1b94669242a8a6f4f51e260
+git checkout threadsafe
 ./autogen.sh
 CFLAGS="-I${BUILD_DIR}/jerasure/include -I${BUILD_DIR}/include"
 if [ "$(uname)" == "Darwin" ]; then

From 194f44ba3d6df233dff8d52dfd44fbd4616dba40 Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Mon, 19 Nov 2018 16:41:48 +0900
Subject: [PATCH 07/18] use openstack/liberasurecode in the dynamic-link mode
 instead of the static-link mode

---
 install_deps.sh      |  12 +-
 liberasurecode.patch | 425 -------------------------------------------
 src/c_api.rs         |   8 +-
 src/lib.rs           |   5 +-
 4 files changed, 12 insertions(+), 438 deletions(-)
 delete mode 100644 liberasurecode.patch

diff --git a/install_deps.sh b/install_deps.sh
index 9ca8e23..32c6478 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -18,31 +18,29 @@ git clone https://github.com/ceph/gf-complete.git
 cd gf-complete/
 git checkout a6862d1
 ./autogen.sh
-./configure --disable-shared --with-pic --prefix $BUILD_DIR
+./configure --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
 cd ../
 
 #
 # jerasure
 #
-git clone https://github.com/frugalos/jerasure.git
+git clone -b threadsafe https://github.com/frugalos/jerasure.git
 cd jerasure/
-git checkout threadsafe
 autoreconf --force --install
-CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --enable-shared --enable-static --with-pic --prefix $BUILD_DIR
+CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
 cd ../
 
 #
 # liberasurecode
 #
-git clone https://github.com/frugalos/openstack_liberasurecode.git
+git clone -b threadsafe https://github.com/frugalos/openstack_liberasurecode.git
 cd openstack_liberasurecode/
-git checkout threadsafe
 ./autogen.sh
 CFLAGS="-I${BUILD_DIR}/jerasure/include -I${BUILD_DIR}/include"
 if [ "$(uname)" == "Darwin" ]; then
     CFLAGS="$CFLAGS -Wno-error=address-of-packed-member"
 fi
-CFLAGS=$CFLAGS LDFLAGS="-L${BUILD_DIR}/lib" ./configure --disable-shared --with-pic --prefix $BUILD_DIR
+CFLAGS=$CFLAGS LDFLAGS="-L${BUILD_DIR}/lib" ./configure --with-pic --prefix $BUILD_DIR
 make $MAKE_FLAGS install
diff --git a/liberasurecode.patch b/liberasurecode.patch
deleted file mode 100644
index 2e848b5..0000000
--- a/liberasurecode.patch
+++ /dev/null
@@ -1,425 +0,0 @@
-diff --git a/include/erasurecode/alg_sig.h b/include/erasurecode/alg_sig.h
-index 52554a9..0a6863d 100644
---- a/include/erasurecode/alg_sig.h
-+++ b/include/erasurecode/alg_sig.h
-@@ -44,7 +44,6 @@ typedef struct alg_sig_s
-   int gf_w;
-   int sig_len;
-   struct jerasure_mult_routines mult_routines;
--  void *jerasure_sohandle;
-   int *tbl1_l;
-   int *tbl1_r;
-   int *tbl2_l;
-diff --git a/src/backends/jerasure/jerasure_rs_cauchy.c b/src/backends/jerasure/jerasure_rs_cauchy.c
-index 3a0365a..217413d 100644
---- a/src/backends/jerasure/jerasure_rs_cauchy.c
-+++ b/src/backends/jerasure/jerasure_rs_cauchy.c
-@@ -28,6 +28,8 @@
- 
- #include <stdio.h>
- #include <stdlib.h>
-+#include <jerasure.h>
-+#include <cauchy.h>
- 
- #include "erasurecode.h"
- #include "erasurecode_backend.h"
-@@ -268,87 +270,16 @@ static void * jerasure_rs_cauchy_init(struct ec_backend_args *args,
-         }
-     }
- 
--    /*
--     * ISO C forbids casting a void* to a function pointer.
--     * Since dlsym return returns a void*, we use this union to
--     * "transform" the void* to a function pointer.
--     */
--    union {
--        cauchy_original_coding_matrix_func  initp;
--        jerasure_matrix_to_bitmatrix_func matrixtobitmatrixp;
--        jerasure_smart_bitmatrix_to_schedule_func matrixschedulep;
--        galois_uninit_field_func uninitp;
--        jerasure_bitmatrix_encode_func encodep;
--        jerasure_bitmatrix_decode_func decodep;
--        jerasure_erasures_to_erased_func erasedp; 
--        jerasure_make_decoding_bitmatrix_func decodematrixp;
--        jerasure_bitmatrix_dotprod_func dotprodp;
--        void *vptr;
--    } func_handle = {.vptr = NULL};
--    
-     /* fill in function addresses */
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_bitmatrix_encode");
--    desc->jerasure_bitmatrix_encode = func_handle.encodep;
--    if (NULL == desc->jerasure_bitmatrix_encode) {
--        goto error; 
--    }
--  
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_bitmatrix_decode");
--    desc->jerasure_bitmatrix_decode = func_handle.decodep;
--    if (NULL == desc->jerasure_bitmatrix_decode) {
--        goto error; 
--    }
--  
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "cauchy_original_coding_matrix");
--    desc->cauchy_original_coding_matrix = func_handle.initp;
--    if (NULL == desc->cauchy_original_coding_matrix) {
--        goto error; 
--    }
--    
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_matrix_to_bitmatrix");
--    desc->jerasure_matrix_to_bitmatrix = func_handle.matrixtobitmatrixp;
--    if (NULL == desc->jerasure_matrix_to_bitmatrix) {
--        goto error; 
--    }
--    
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_smart_bitmatrix_to_schedule");
--    desc->jerasure_smart_bitmatrix_to_schedule = func_handle.matrixschedulep;
--    if (NULL == desc->jerasure_smart_bitmatrix_to_schedule) {
--        goto error; 
--    }
--    
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_make_decoding_bitmatrix");
--    desc->jerasure_make_decoding_bitmatrix = func_handle.decodematrixp;
--    if (NULL == desc->jerasure_make_decoding_bitmatrix) {
--        goto error; 
--    }
--    
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_bitmatrix_dotprod");
--    desc->jerasure_bitmatrix_dotprod = func_handle.dotprodp;
--    if (NULL == desc->jerasure_bitmatrix_dotprod) {
--        goto error; 
--    }
--  
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_erasures_to_erased");
--    desc->jerasure_erasures_to_erased = func_handle.erasedp;
--    if (NULL == desc->jerasure_erasures_to_erased) {
--        goto error; 
--    } 
--
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "galois_uninit_field");
--    desc->galois_uninit_field = func_handle.uninitp;
--    if (NULL == desc->galois_uninit_field) {
--        goto error;
--    }
-+    desc->jerasure_bitmatrix_encode = jerasure_bitmatrix_encode;
-+    desc->jerasure_bitmatrix_decode = jerasure_bitmatrix_decode;
-+    desc->cauchy_original_coding_matrix = cauchy_original_coding_matrix;
-+    desc->jerasure_matrix_to_bitmatrix = jerasure_matrix_to_bitmatrix;
-+    desc->jerasure_smart_bitmatrix_to_schedule = jerasure_smart_bitmatrix_to_schedule;
-+    desc->jerasure_make_decoding_bitmatrix = jerasure_make_decoding_bitmatrix;
-+    desc->jerasure_bitmatrix_dotprod = jerasure_bitmatrix_dotprod;
-+    desc->jerasure_erasures_to_erased = jerasure_erasures_to_erased;
-+    desc->galois_uninit_field = (galois_uninit_field_func)galois_uninit_field;
- 
-     /* setup the Cauchy matrices and schedules */
-     desc->matrix = desc->cauchy_original_coding_matrix(k, m, w);
-diff --git a/src/backends/jerasure/jerasure_rs_vand.c b/src/backends/jerasure/jerasure_rs_vand.c
-index 9395046..143e00f 100644
---- a/src/backends/jerasure/jerasure_rs_vand.c
-+++ b/src/backends/jerasure/jerasure_rs_vand.c
-@@ -28,6 +28,8 @@
- 
- #include <stdio.h>
- #include <stdlib.h>
-+#include <jerasure.h>
-+#include <reed_sol.h>
- 
- #include "erasurecode.h"
- #include "erasurecode_backend.h"
-@@ -232,98 +234,40 @@ static void * jerasure_rs_vand_init(struct ec_backend_args *args,
-         }
-      }
- 
--     /*
--     * ISO C forbids casting a void* to a function pointer.
--     * Since dlsym return returns a void*, we use this union to
--     * "transform" the void* to a function pointer.
--     */
--    union {
--        reed_sol_vandermonde_coding_matrix_func initp;
--        galois_uninit_field_func uninitp;
--        jerasure_matrix_encode_func encodep;
--        jerasure_matrix_decode_func decodep;
--        jerasure_make_decoding_matrix_func decodematrixp;
--        jerasure_erasures_to_erased_func erasep;
--        jerasure_matrix_dotprod_func dotprodp;
--        void *vptr;
--    } func_handle = {.vptr = NULL};
--
--
-     /* fill in function addresses */
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_matrix_encode");
--    desc->jerasure_matrix_encode = func_handle.encodep;
--    if (NULL == desc->jerasure_matrix_encode) {
--        goto error; 
--    }
--  
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_matrix_decode");
--    desc->jerasure_matrix_decode = func_handle.decodep;
--    if (NULL == desc->jerasure_matrix_decode) {
--        goto error; 
--    }
--  
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_make_decoding_matrix");
--    desc->jerasure_make_decoding_matrix = func_handle.decodematrixp;
--    if (NULL == desc->jerasure_make_decoding_matrix) {
--        goto error; 
--    }
--  
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_matrix_dotprod");
--    desc->jerasure_matrix_dotprod = func_handle.dotprodp;
--    if (NULL == desc->jerasure_matrix_dotprod) {
--        goto error; 
--    }
--  
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "jerasure_erasures_to_erased");
--    desc->jerasure_erasures_to_erased = func_handle.erasep;
--    if (NULL == desc->jerasure_erasures_to_erased) {
--        goto error; 
--    }
-- 
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "reed_sol_vandermonde_coding_matrix");
--    desc->reed_sol_vandermonde_coding_matrix = func_handle.initp;
--    if (NULL == desc->reed_sol_vandermonde_coding_matrix) {
--        goto error; 
--    }
--
--    func_handle.vptr = NULL;
--    func_handle.vptr = dlsym(backend_sohandle, "galois_uninit_field");
--    desc->galois_uninit_field = func_handle.uninitp;
--    if (NULL == desc->galois_uninit_field) {
--        goto error;
--    }
-+    desc->jerasure_matrix_encode = jerasure_matrix_encode;
-+    desc->jerasure_matrix_decode = jerasure_matrix_decode;
-+    desc->jerasure_make_decoding_matrix = jerasure_make_decoding_matrix;
-+    desc->jerasure_matrix_dotprod = jerasure_matrix_dotprod;
-+    desc->jerasure_erasures_to_erased = jerasure_erasures_to_erased;
-+    desc->reed_sol_vandermonde_coding_matrix = reed_sol_vandermonde_coding_matrix;
-+    desc->galois_uninit_field = (galois_uninit_field_func)galois_uninit_field;
- 
-     desc->matrix = desc->reed_sol_vandermonde_coding_matrix(
-             desc->k, desc->m, desc->w);
-     if (NULL == desc->matrix) {
--        goto error; 
-+        goto error;
-     }
- 
-     return desc;
- 
- error:
-     free(desc);
--    
-+
-     return NULL;
- }
- 
- /**
-- * Return the element-size, which is the number of bits stored 
-- * on a given device, per codeword.  For Vandermonde, this is 
-- * 'w'.  For somthing like cauchy, this is packetsize * w. 
-- * 
-+ * Return the element-size, which is the number of bits stored
-+ * on a given device, per codeword.  For Vandermonde, this is
-+ * 'w'.  For somthing like cauchy, this is packetsize * w.
-+ *
-  * Returns the size in bits!
-  */
- static int
- jerasure_rs_vand_element_size(void* desc)
- {
--    struct jerasure_rs_vand_descriptor *jerasure_desc = 
-+    struct jerasure_rs_vand_descriptor *jerasure_desc =
-         (struct jerasure_rs_vand_descriptor*)desc;
- 
-     /* Note that cauchy will return pyeclib_handle->w * PYECC_CAUCHY_PACKETSIZE * 8 */
-diff --git a/src/erasurecode.c b/src/erasurecode.c
-index fb6d5de..4c3d024 100644
---- a/src/erasurecode.c
-+++ b/src/erasurecode.c
-@@ -177,6 +177,9 @@ void* liberasurecode_backend_open(ec_backend_t instance)
- {
-     if (NULL == instance)
-         return NULL;
-+    if (strncmp(instance->common.soname, "libJerasure", 11) == 0)
-+        return (void *)-1;
-+
-     /* Use RTLD_LOCAL to avoid symbol collisions */
-     return dlopen(instance->common.soname, RTLD_LAZY | RTLD_LOCAL);
- }
-@@ -186,6 +189,9 @@ int liberasurecode_backend_close(ec_backend_t instance)
-     if (NULL == instance || NULL == instance->desc.backend_sohandle)
-         return 0;
- 
-+    if (strncmp(instance->common.soname, "libJerasure", 11) == 0)
-+        return 0;
-+
-     dlclose(instance->desc.backend_sohandle);
-     dlerror();    /* Clear any existing errors */
- 
-diff --git a/src/utils/chksum/alg_sig.c b/src/utils/chksum/alg_sig.c
-index 86740e6..bee5fca 100644
---- a/src/utils/chksum/alg_sig.c
-+++ b/src/utils/chksum/alg_sig.c
-@@ -27,52 +27,27 @@
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
--#define GALOIS_SINGLE_MULTIPLY "galois_single_multiply"
--#define GALOIS_UNINIT "galois_uninit_field"
-+#include <jerasure.h>
-+#define GALOIS_SINGLE_MULTIPLY galois_single_multiply
-+#define GALOIS_UNINIT galois_uninit_field
- 
- int valid_gf_w[] = { 8, 16, -1 };
- int valid_pairs[][2] = { { 8, 32}, {16, 32}, {16, 64}, {-1, -1} };
- 
--galois_single_multiply_func get_galois_multi_func(void *handle) {
--    /*
--     * ISO C forbids casting a void* to a function pointer.
--     * Since dlsym return returns a void*, we use this union to
--     * "transform" the void* to a function pointer.
--     */
--    union {
--        galois_single_multiply_func fptr;
--        void *vptr;
--    } func_handle = {.vptr = NULL};
--    func_handle.vptr = dlsym(handle,  GALOIS_SINGLE_MULTIPLY);
--    return func_handle.fptr;
-+galois_single_multiply_func get_galois_multi_func() {
-+    return (galois_single_multiply_func)GALOIS_SINGLE_MULTIPLY;
- }
- 
- void stub_galois_uninit_field(int w){}
- 
--galois_uninit_field_func get_galois_uninit_func(void *handle) {
--    /*
--     * ISO C forbids casting a void* to a function pointer.
--     * Since dlsym return returns a void*, we use this union to
--     * "transform" the void* to a function pointer.
--     */
--    union {
--        galois_uninit_field_func fptr;
--        void *vptr;
--    } func_handle = {.vptr = NULL};
--    func_handle.vptr = dlsym(handle,  GALOIS_UNINIT);
--    return func_handle.fptr;
--}
--
--
--void *get_jerasure_sohandle()
--{
--    return dlopen(JERASURE_SONAME, RTLD_LAZY | RTLD_LOCAL);
-+galois_uninit_field_func get_galois_uninit_func() {
-+    return (galois_uninit_field_func)GALOIS_UNINIT;
- }
- 
--int load_gf_functions(void *sohandle, struct jerasure_mult_routines *routines)
-+int load_gf_functions(struct jerasure_mult_routines *routines)
- {
--    routines->galois_single_multiply = get_galois_multi_func(sohandle);
--    routines->galois_uninit_field = get_galois_uninit_func(sohandle);
-+    routines->galois_single_multiply = get_galois_multi_func();
-+    routines->galois_uninit_field = get_galois_uninit_func();
-     if (NULL == routines->galois_single_multiply) {
-       return -1;
-     }
-@@ -93,7 +68,7 @@ int load_gf_functions(void *sohandle, struct jerasure_mult_routines *routines)
- }
- 
- static
--alg_sig_t *init_alg_sig_w8(void *jerasure_sohandle, int sig_len)
-+alg_sig_t *init_alg_sig_w8(int sig_len)
- {
-     alg_sig_t *alg_sig_handle;
-     int num_gf_lr_table_syms;
-@@ -107,9 +82,7 @@ alg_sig_t *init_alg_sig_w8(void *jerasure_sohandle, int sig_len)
-       return NULL;
-     }
- 
--    alg_sig_handle->jerasure_sohandle = jerasure_sohandle;
--
--    if (load_gf_functions(alg_sig_handle->jerasure_sohandle, &(alg_sig_handle->mult_routines)) < 0) {
-+    if (load_gf_functions(&(alg_sig_handle->mult_routines)) < 0) {
-       free(alg_sig_handle);
-       return NULL;
-     }
-@@ -150,7 +123,7 @@ alg_sig_t *init_alg_sig_w8(void *jerasure_sohandle, int sig_len)
- }
- 
- static
--alg_sig_t *init_alg_sig_w16(void *jerasure_sohandle, int sig_len)
-+alg_sig_t *init_alg_sig_w16(int sig_len)
- {
-     alg_sig_t *alg_sig_handle;
-     int num_gf_lr_table_syms;
-@@ -159,18 +132,12 @@ alg_sig_t *init_alg_sig_w16(void *jerasure_sohandle, int sig_len)
-     int alpha = 2, beta = 4, gamma = 8;
-     int num_components = sig_len / w;
- 
--    if (NULL == jerasure_sohandle) {
--        return NULL;
--    }
--    
-     alg_sig_handle = (alg_sig_t *)malloc(sizeof(alg_sig_t));
-     if (NULL == alg_sig_handle) {
-       return NULL;
-     }
- 
--    alg_sig_handle->jerasure_sohandle = jerasure_sohandle;
--
--    if (load_gf_functions(alg_sig_handle->jerasure_sohandle, &(alg_sig_handle->mult_routines)) < 0) {
-+    if (load_gf_functions(&(alg_sig_handle->mult_routines)) < 0) {
-       free(alg_sig_handle);
-       return NULL;
-     }
-@@ -216,15 +183,9 @@ alg_sig_t *init_alg_sig_w16(void *jerasure_sohandle, int sig_len)
- alg_sig_t *init_alg_sig(int sig_len, int gf_w)
- {
-   int i=0;
--  void *jerasure_sohandle = get_jerasure_sohandle();
--
--  if (NULL == jerasure_sohandle) {
--    fprintf (stderr, "Could not open Jerasure backend.  Install Jerasure or fix LD_LIBRARY_PATH.  Passing.\n");
--    return NULL;
--  }
- 
-   while (valid_pairs[i][0] > -1) {
--    if (gf_w == valid_pairs[i][0] && 
-+    if (gf_w == valid_pairs[i][0] &&
-         sig_len == valid_pairs[i][1]) {
-       break;
-     }
-@@ -236,9 +197,9 @@ alg_sig_t *init_alg_sig(int sig_len, int gf_w)
-   }
- 
-   if (gf_w == 8) {
--    return init_alg_sig_w8(jerasure_sohandle, sig_len);
-+    return init_alg_sig_w8(sig_len);
-   } else if (gf_w == 16) {
--    return init_alg_sig_w16(jerasure_sohandle, sig_len);
-+    return init_alg_sig_w16(sig_len);
-   }
-   return NULL;
- }
-@@ -254,7 +215,6 @@ void destroy_alg_sig(alg_sig_t* alg_sig_handle)
-   }
- 
-   alg_sig_handle->mult_routines.galois_uninit_field(alg_sig_handle->gf_w);
--  dlclose(alg_sig_handle->jerasure_sohandle);
- 
-   int num_components = alg_sig_handle->sig_len / alg_sig_handle->gf_w;
- 
diff --git a/src/c_api.rs b/src/c_api.rs
index f7136d2..27a164a 100644
--- a/src/c_api.rs
+++ b/src/c_api.rs
@@ -43,10 +43,10 @@ pub const EINVALIDPARAMS: u32 = 206;
 pub const EBADHEADER: u32 = 207;
 pub const EINSUFFFRAGS: u32 = 208;
 
-#[link(name = "erasurecode", kind = "static")]
-#[link(name = "gf_complete", kind = "static")]
-#[link(name = "Jerasure", kind = "static")]
-#[link(name = "Xorcode", kind = "static")]
+#[link(name = "erasurecode")]
+#[link(name = "gf_complete")]
+#[link(name = "Jerasure")]
+#[link(name = "Xorcode")]
 extern "C" {
     /// Create a liberasurecode instance and return a descriptor
     /// for use with EC operations (encode, decode, reconstruct)
diff --git a/src/lib.rs b/src/lib.rs
index 3366715..642aaea 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -48,7 +48,6 @@ extern crate libc;
 
 use std::num::NonZeroUsize;
 use std::slice;
-use std::time::Duration;
 
 pub use result::{Error, Result};
 
@@ -291,7 +290,9 @@ impl ErasureCoder {
 }
 impl Drop for ErasureCoder {
     fn drop(&mut self) {
-        let _ = c_api::instance_destroy(self.desc);
+        with_global_lock(|| {
+            let _ = c_api::instance_destroy(self.desc);
+        })
     }
 }
 

From 149a047368aed89f08a6ed3f2afa4beafa40832d Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Mon, 19 Nov 2018 16:47:11 +0900
Subject: [PATCH 08/18] add LibErasureCodeRsVand on the basis of PR3 of
 frugalos/liberasurecode

---
 src/lib.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 642aaea..085b3fb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -62,6 +62,9 @@ pub enum Backend {
 
     /// Cauchy base Read-Solomon erasure coding provided by `jerasure` library (default).
     JerasureRsCauchy,
+
+    /// Read-Solomon erasure coding built-in `openstack/liberasurecode`.
+    LibErasureCodeRsVand,
 }
 impl Default for Backend {
     /// `Backend::JerasureRsCauchy`を返す.
@@ -142,6 +145,7 @@ impl Builder {
         let backend_id = match self.backend {
             Backend::JerasureRsCauchy => c_api::EcBackendId::JERASURE_RS_CAUCHY,
             Backend::JerasureRsVand => c_api::EcBackendId::JERASURE_RS_VAND,
+            Backend::LibErasureCodeRsVand => c_api::EcBackendId::LIBERASURECODE_RS_VAND,
         };
         let checksum_type = match self.checksum {
             Checksum::None => c_api::EcChecksumType::NONE,
@@ -381,7 +385,13 @@ mod tests {
 
     #[test]
     fn various_params() {
-        for backend in [Backend::JerasureRsCauchy, Backend::JerasureRsVand].iter() {
+        for backend in [
+            Backend::JerasureRsCauchy,
+            Backend::JerasureRsVand,
+            Backend::LibErasureCodeRsVand,
+        ]
+            .iter()
+        {
             for checksum in [Checksum::None, Checksum::Crc32, Checksum::Md5].iter() {
                 for data_fragments in (3..6).map(non_zero) {
                     for parity_fragments in (1..4).map(non_zero) {

From f61578ee56f3f5f7f2372f8b330f2d3cdf5b91fe Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Mon, 19 Nov 2018 16:50:35 +0900
Subject: [PATCH 09/18] reflect the removal of a patch file

---
 build.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.rs b/build.rs
index 660a5de..6e2eccd 100644
--- a/build.rs
+++ b/build.rs
@@ -11,7 +11,7 @@ fn main() {
     let _ = fs::remove_dir_all(&build_dir);
     fs::create_dir(&build_dir).unwrap();
 
-    for file in &["install_deps.sh", "liberasurecode.patch"] {
+    for file in &["install_deps.sh"] {
         fs::copy(file, build_dir.join(file)).unwrap();
     }
 

From cecbcef7fa235e5d9d4aaacd999a9adaea7a9c3e Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Mon, 19 Nov 2018 19:46:46 +0900
Subject: [PATCH 10/18] unlimit the number of cargo test threads

---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 86931c4..831a8ec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ before_script:
   - rustup component add clippy-preview
 
 script:
-  - cargo test -- --test-threads=1
+  - cargo test
   - cargo clippy
 
 matrix:

From 7ab9eb3345c5dcf863bd41ac85d2a0be357b2485 Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Mon, 26 Nov 2018 23:39:54 +0900
Subject: [PATCH 11/18] add a shell-script to install dependent libraries

---
 Cargo.toml                     |  4 +-
 install_dependent_libraries.sh | 69 ++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+), 2 deletions(-)
 create mode 100755 install_dependent_libraries.sh

diff --git a/Cargo.toml b/Cargo.toml
index b75b56a..ab5897b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,8 +2,8 @@
 name = "liberasurecode"
 version = "1.0.2"
 authors = ["The FrugalOS Developers"]
-links = "erasurecode"
-build = "build.rs"
+# links = "erasurecode"
+# build = "build.rs"
 description = "A Rust wrapper for `openstack/liberasurecode`"
 homepage = "https://github.com/frugalos/liberasurecode"
 repository = "https://github.com/frugalos/liberasurecode"
diff --git a/install_dependent_libraries.sh b/install_dependent_libraries.sh
new file mode 100755
index 0000000..2c349aa
--- /dev/null
+++ b/install_dependent_libraries.sh
@@ -0,0 +1,69 @@
+#! /usr/bin/env bash
+
+set -eux
+
+INSTALL_DIR=""
+
+if [ $# -eq 1 ]
+then
+    INSTALL_DIR=$1
+else
+    echo "This script file requires a single argument where we install dependent libraries"
+    exit 1
+fi
+
+case $INSTALL_DIR in
+    /*)
+	echo "We install dependent libraries into $INSTALL_DIR."
+	;;
+    *)
+	echo "You passed a relative path. Please use an absolute path."
+	exit 1
+	;;
+esac
+	
+
+MAKE_FLAGS=""
+
+# Please try and add other distributions.
+case "$(uname)" in
+    "Linux") MAKE_FLAGS="-j$(nproc)";;
+    "Darwin") MAKE_FLAGS="-j$(sysctl -n hw.ncpu)"
+esac
+
+BUILD_DIR="build_working_directory"
+mkdir $BUILD_DIR
+
+#
+# gf-complete
+#
+git clone https://github.com/ceph/gf-complete.git $BUILD_DIR/gf-complete
+cd $BUILD_DIR/gf-complete
+git checkout a6862d1
+./autogen.sh
+./configure --with-pic --prefix $INSTALL_DIR
+make $MAKE_FLAGS install
+cd ../..
+
+#
+# jerasure
+#
+git clone -b threadsafe https://github.com/frugalos/jerasure.git $BUILD_DIR/jerasure
+cd $BUILD_DIR/jerasure
+autoreconf --force --install
+CFLAGS="-I${INSTALL_DIR}/include" LDFLAGS="-L${INSTALL_DIR}/lib" ./configure --with-pic --prefix $INSTALL_DIR
+make $MAKE_FLAGS install
+cd ../..
+
+#
+# liberasurecode
+#
+git clone -b threadsafe https://github.com/frugalos/openstack_liberasurecode.git $BUILD_DIR/openstack_liberasurecode
+cd $BUILD_DIR/openstack_liberasurecode
+./autogen.sh
+CFLAGS="-I${INSTALL_DIR}/include -I${INSTALL_DIR}/include/jerasure"
+if [ "$(uname)" == "Darwin" ]; then
+    CFLAGS="$CFLAGS -Wno-error=address-of-packed-member"
+fi
+CFLAGS=$CFLAGS LDFLAGS="-L${INSTALL_DIR}/lib" ./configure --with-pic --prefix $INSTALL_DIR
+make $MAKE_FLAGS install

From b1ff114e05c6803f698d2ea08d2cb7c005766adb Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Fri, 30 Nov 2018 20:12:11 +0900
Subject: [PATCH 12/18] change branches on which this branch depends to
 frugalos_dyn

---
 install_deps.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/install_deps.sh b/install_deps.sh
index 32c6478..049c581 100755
--- a/install_deps.sh
+++ b/install_deps.sh
@@ -25,7 +25,7 @@ cd ../
 #
 # jerasure
 #
-git clone -b threadsafe https://github.com/frugalos/jerasure.git
+git clone -b frugalos_dyn https://github.com/frugalos/jerasure.git
 cd jerasure/
 autoreconf --force --install
 CFLAGS="-I${BUILD_DIR}/include" LDFLAGS="-L${BUILD_DIR}/lib" ./configure --with-pic --prefix $BUILD_DIR
@@ -35,7 +35,7 @@ cd ../
 #
 # liberasurecode
 #
-git clone -b threadsafe https://github.com/frugalos/openstack_liberasurecode.git
+git clone -b frugalos_dyn https://github.com/frugalos/openstack_liberasurecode.git
 cd openstack_liberasurecode/
 ./autogen.sh
 CFLAGS="-I${BUILD_DIR}/jerasure/include -I${BUILD_DIR}/include"

From 75cc965a282522456df85f0eb634948885066dc3 Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Fri, 30 Nov 2018 21:07:44 +0900
Subject: [PATCH 13/18] use the environment variable FRUGALOS_DIR

---
 build.rs                       | 30 +++---------------------------
 install_dependent_libraries.sh | 17 ++++++++---------
 2 files changed, 11 insertions(+), 36 deletions(-)

diff --git a/build.rs b/build.rs
index 6e2eccd..ddd268c 100644
--- a/build.rs
+++ b/build.rs
@@ -6,32 +6,8 @@ use std::process::{Command, Stdio};
 fn main() {
     println!("cargo:rerun-if-changed=build.rs");
 
-    let outdir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
-    let build_dir = outdir.join("build");
-    let _ = fs::remove_dir_all(&build_dir);
-    fs::create_dir(&build_dir).unwrap();
+    let frugalos_dir: std::ffi::OsString = env::var_os("FRUGALOS_DIR").unwrap();
+    let frugalos_dir: String = frugalos_dir.into_string().unwrap();
 
-    for file in &["install_deps.sh"] {
-        fs::copy(file, build_dir.join(file)).unwrap();
-    }
-
-    match Command::new("./install_deps.sh")
-        .current_dir(&build_dir)
-        .stderr(Stdio::inherit())
-        .output()
-    {
-        Err(e) => {
-            panic!("{}: {}", build_dir.display(), e);
-        }
-        Ok(output) => {
-            if !output.status.success() {
-                panic!(
-                    "./install_deps.sh failed: exit-code={:?}",
-                    output.status.code()
-                );
-            }
-        }
-    }
-
-    println!("cargo:rustc-link-search={}/lib", build_dir.display());
+    println!("cargo:rustc-link-search={}/lib", frugalos_dir);
 }
diff --git a/install_dependent_libraries.sh b/install_dependent_libraries.sh
index 2c349aa..0d03cb0 100755
--- a/install_dependent_libraries.sh
+++ b/install_dependent_libraries.sh
@@ -4,24 +4,23 @@ set -eux
 
 INSTALL_DIR=""
 
-if [ $# -eq 1 ]
+if [ -z $FRUGALOS_DIR ]
 then
-    INSTALL_DIR=$1
-else
-    echo "This script file requires a single argument where we install dependent libraries"
-    exit 1
+   echo "Please set the environment FRUGALOS_DIR to install auxiliary artifacts."
+   exit 1
 fi
 
+INSTALL_DIR=$FRUGALOS_DIR
+
 case $INSTALL_DIR in
     /*)
-	echo "We install dependent libraries into $INSTALL_DIR."
+	echo "We install dependent artifacts into FRUGALOS_DIR=$FRUGALOS_DIR"
 	;;
     *)
 	echo "You passed a relative path. Please use an absolute path."
 	exit 1
 	;;
 esac
-	
 
 MAKE_FLAGS=""
 
@@ -48,7 +47,7 @@ cd ../..
 #
 # jerasure
 #
-git clone -b threadsafe https://github.com/frugalos/jerasure.git $BUILD_DIR/jerasure
+git clone -b frugalos_dyn https://github.com/frugalos/jerasure.git $BUILD_DIR/jerasure
 cd $BUILD_DIR/jerasure
 autoreconf --force --install
 CFLAGS="-I${INSTALL_DIR}/include" LDFLAGS="-L${INSTALL_DIR}/lib" ./configure --with-pic --prefix $INSTALL_DIR
@@ -58,7 +57,7 @@ cd ../..
 #
 # liberasurecode
 #
-git clone -b threadsafe https://github.com/frugalos/openstack_liberasurecode.git $BUILD_DIR/openstack_liberasurecode
+git clone -b frugalos_dyn https://github.com/frugalos/openstack_liberasurecode.git $BUILD_DIR/openstack_liberasurecode
 cd $BUILD_DIR/openstack_liberasurecode
 ./autogen.sh
 CFLAGS="-I${INSTALL_DIR}/include -I${INSTALL_DIR}/include/jerasure"

From 78918dd1e02b63fc9e6d065d59b48c7d54428858 Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Fri, 30 Nov 2018 23:14:35 +0900
Subject: [PATCH 14/18] delete unneeded lines

---
 build.rs | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/build.rs b/build.rs
index ddd268c..4730497 100644
--- a/build.rs
+++ b/build.rs
@@ -1,7 +1,4 @@
 use std::env;
-use std::fs;
-use std::path::PathBuf;
-use std::process::{Command, Stdio};
 
 fn main() {
     println!("cargo:rerun-if-changed=build.rs");

From 6ae193b5f8556bc2229e2dda2016f93fdfbb54e4 Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Fri, 30 Nov 2018 23:20:49 +0900
Subject: [PATCH 15/18] fix .travis.yml

---
 .travis.yml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 831a8ec..9f01a0c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ rust:
   - nightly
 
 before_script:
+  - ./install_dependent_libraries.sh
   - rustup component add clippy-preview
 
 script:
@@ -19,4 +20,6 @@ matrix:
 
 env:
   global:
-  - RUSTFLAGS="-D warnings"
+    - FRUGALOS_DIR=$TRAVIS_BUILD_DIR/frugalos_working_dir
+    - LD_LIBRARY_PATH=$FRUGALOS_DIR/lib
+    - RUSTFLAGS="-D warnings"

From 7fcca4f8deb54fb15093f56b954be60df48b9d4f Mon Sep 17 00:00:00 2001
From: yuuya uezato <yuuya_uezato@dwango.co.jp>
Date: Fri, 30 Nov 2018 23:31:56 +0900
Subject: [PATCH 16/18] change libJerasure -> libFrugalosJerasure

---
 src/c_api.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/c_api.rs b/src/c_api.rs
index 27a164a..56868d5 100644
--- a/src/c_api.rs
+++ b/src/c_api.rs
@@ -45,7 +45,7 @@ pub const EINSUFFFRAGS: u32 = 208;
 
 #[link(name = "erasurecode")]
 #[link(name = "gf_complete")]
-#[link(name = "Jerasure")]
+#[link(name = "FrugalosJerasure")]
 #[link(name = "Xorcode")]
 extern "C" {
     /// Create a liberasurecode instance and return a descriptor

From ce8ad6c506d7213422ec93f5eaa304f1ba28b9e6 Mon Sep 17 00:00:00 2001
From: Yuya Uezato <yuuya_uezato@dwango.co.jp>
Date: Fri, 30 Nov 2018 23:41:06 +0900
Subject: [PATCH 17/18] Update README.md

---
 README.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/README.md b/README.md
index 354a415..fd2f655 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,16 @@ For example, on Ubuntu, you can install those by executing the following command
 $ sudo apt install gcc git make automake autoconf libtool
 ```
 
+Before do `cargo build`, please set the two environment variables `FRUGALOS_DIR` and `LD_LIBRARY_PATH`
+```
+FRUGALOS_DIR=/some/path/to/locate/generated/artifacts
+LD_LIBRARY_PATH=$FRUGALOS_DIR/lib
+```
+and do the following shell script to install auxiliary files
+```
+./install_dependent_libraries.sh
+```
+
 
 Examples
 --------

From 91b6d5cb2496fdd50f7c232c46ccd023ed1211fb Mon Sep 17 00:00:00 2001
From: Yuya Uezato <yuuya_uezato@dwango.co.jp>
Date: Tue, 4 Dec 2018 18:12:32 +0900
Subject: [PATCH 18/18] Update Cargo.toml

---
 Cargo.toml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index ab5897b..9582eba 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,8 +2,6 @@
 name = "liberasurecode"
 version = "1.0.2"
 authors = ["The FrugalOS Developers"]
-# links = "erasurecode"
-# build = "build.rs"
 description = "A Rust wrapper for `openstack/liberasurecode`"
 homepage = "https://github.com/frugalos/liberasurecode"
 repository = "https://github.com/frugalos/liberasurecode"