[cherry-pick] Add support to gcc8, add docker env (#20892)

* add support to gcc8, add docker env
* remove the warning issue

cmake/external/cares.cmake

@@ -25,6 +25,12 @@ SET(CARES_SOURCES_DIR ${THIRD_PARTY_PATH}/cares)
 SET(CARES_INSTALL_DIR ${THIRD_PARTY_PATH}/install/cares)
 SET(CARES_INCLUDE_DIR "${CARES_INSTALL_DIR}/include/" CACHE PATH "cares include directory." FORCE)
 
+if(NOT APPLE AND NOT WIN32)
+    if(${CMAKE_CXX_COMPILER_VERSION} VERSION_GREATER 8.0)
+        set(PATCH_COMMAND_CARES cp ${PADDLE_SOURCE_DIR}/patches/cares/ares_parse_ptr_reply.c.txt ${CARES_SOURCES_DIR}/src/extern_cares/ares_parse_ptr_reply.c)
+    endif()
+endif()
+
 ExternalProject_Add(
     extern_cares
     GIT_REPOSITORY "https://github.com/c-ares/c-ares.git"
@@ -33,6 +39,7 @@ ExternalProject_Add(
     UPDATE_COMMAND  ""
     CONFIGURE_COMMAND ./buildconf && ./configure --disable-shared --prefix=${CARES_INSTALL_DIR}
     BUILD_IN_SOURCE 1
+    PATCH_COMMAND ${PATCH_COMMAND_CARES}
     BUILD_COMMAND   make -j8
     INSTALL_COMMAND make install
 )

cmake/external/grpc.cmake

@@ -30,7 +30,11 @@ ProcessorCount(NUM_OF_PROCESSOR)
 IF(APPLE)
   SET(BUILD_CMD make -n HAS_SYSTEM_PROTOBUF=false -s -j ${NUM_OF_PROCESSOR} static grpc_cpp_plugin | sed "s/-Werror//g" | sh)
 ELSE()
-  SET(BUILD_CMD make HAS_SYSTEM_PROTOBUF=false -s -j ${NUM_OF_PROCESSOR} static grpc_cpp_plugin)
+  if(${CMAKE_CXX_COMPILER_VERSION} VERSION_GREATER 8.0)
+    SET(BUILD_CMD make CFLAGS=-Wno-error=sizeof-pointer-memaccess CXXFLAGS=-Wno-error=ignored-qualifiers HAS_SYSTEM_PROTOBUF=false -s -j ${NUM_OF_PROCESSOR} static grpc_cpp_plugin)
+  else()
+    SET(BUILD_CMD make HAS_SYSTEM_PROTOBUF=false -s -j ${NUM_OF_PROCESSOR} static grpc_cpp_plugin)
+  endif()
 ENDIF()
 
 # FIXME(wuyi): do not build zlib cares protobuf twice, find a way to build grpc with them

cmake/external/warpctc.cmake

@@ -29,11 +29,8 @@ ELSE()
     SET(USE_OMP ON)
 ENDIF()
 
-IF(WIN32)
-    SET(WARPCTC_REPOSITORY "https://github.com/wopeizl/warp-ctc.git")
-ELSE()
-    SET(WARPCTC_REPOSITORY "https://github.com/dzhwinter/warp-ctc.git")
-ENDIF()
+# TODO: Use the official github address instead of private branch
+SET(WARPCTC_REPOSITORY "https://github.com/wopeizl/warp-ctc.git")
 
 ExternalProject_Add(
     extern_warpctc

cmake/flags.cmake

@@ -155,9 +155,25 @@ set(COMMON_FLAGS
     -Wno-error=terminate  # Warning in PADDLE_ENFORCE
     -Wno-error=int-in-bool-context # Warning in Eigen gcc 7.2
     -Wimplicit-fallthrough=0 # Warning in tinyformat.h
+    -Wno-error=maybe-uninitialized # Warning in boost gcc 7.2
     ${fsanitize}
 )
 
+if(NOT APPLE)
+    if(${CMAKE_CXX_COMPILER_VERSION} VERSION_GREATER 8.0)
+        set(COMMON_FLAGS
+                ${COMMON_FLAGS}
+                -Wno-format-truncation # Warning in boost gcc 8.2
+                -Wno-error=cast-function-type # Warning in boost gcc 8.2
+                -Wno-error=parentheses # Warning in boost gcc 8.2
+                -Wno-error=catch-value # Warning in boost gcc 8.2
+                -Wno-error=nonnull-compare # Warning in boost gcc 8.2
+                -Wno-error=address # Warning in boost gcc 8.2
+                -Wno-ignored-qualifiers # Warning in boost gcc 8.2
+                )
+    endif()
+endif(NOT APPLE)
+
 set(GPU_COMMON_FLAGS
     -fPIC
     -fno-omit-frame-pointer

paddle/fluid/framework/details/exception_holder.h

@@ -29,9 +29,9 @@ class ExceptionHolder {
   void Catch(std::exception_ptr eptr) {
     try {
       std::rethrow_exception(eptr);
-    } catch (platform::EOFException exp) {
+    } catch (platform::EOFException& exp) {
       Catch(exp);
-    } catch (platform::EnforceNotMet exp) {
+    } catch (platform::EnforceNotMet& exp) {
       Catch(exp);
     } catch (std::exception& ex) {
       LOG(FATAL) << "std::exception caught, " << ex.what();

paddle/fluid/framework/ir/coalesce_grad_tensor_pass.cc

@@ -451,7 +451,7 @@ class CoalesceGradTensorPass : public ir::Pass {
           params_grads->emplace_back(std::make_pair(
               backward_vars[i] /*param*/, backward_vars[i + 1] /*grad*/));
         }
-      } catch (boost::bad_get e) {
+      } catch (boost::bad_get &e) {
       }
     }
   }

paddle/fluid/framework/ir/multi_devices_graph_pass/multi_devices_graph_pass.cc

@@ -242,7 +242,7 @@ void MultiDevSSAGraphBuilderBase::ApplyImpl(ir::Graph *graph) const {
               InsertCollectiveOp(&result, p_name, g_name);
             }
           }
-        } catch (boost::bad_get e) {
+        } catch (boost::bad_get &e) {
         }
       }
     }
@@ -777,7 +777,7 @@ std::vector<ir::Node *> ReduceSSAGraphBuilder::SortForReduceMode(
         backward_vars =
             boost::get<std::vector<std::string>>(node->Op()->GetNullableAttr(
                 OpProtoAndCheckerMaker::OpRoleVarAttrName()));
-      } catch (boost::bad_get e) {
+      } catch (boost::bad_get &e) {
       }
       PADDLE_ENFORCE_EQ(backward_vars.size() % 2, 0);
 

paddle/fluid/framework/ir/pass_test.cc

@@ -60,7 +60,7 @@ TEST(PassTest, TestPassAttrCheck) {
   std::string exception;
   try {
     graph.reset(pass->Apply(graph.release()));
-  } catch (paddle::platform::EnforceNotMet e) {
+  } catch (paddle::platform::EnforceNotMet& e) {
     exception = std::string(e.what());
   }
   ASSERT_TRUE(exception.find("test_pass_attr not set") != exception.npos);
@@ -71,7 +71,7 @@ TEST(PassTest, TestPassAttrCheck) {
 
   try {
     graph.reset(pass->Apply(graph.release()));
-  } catch (paddle::platform::EnforceNotMet e) {
+  } catch (paddle::platform::EnforceNotMet& e) {
     exception = std::string(e.what());
   }
   ASSERT_TRUE(exception.find("test_graph_attr not set") != exception.npos);
@@ -96,7 +96,7 @@ TEST(PassTest, TestPassAttrCheck) {
   graph->Get<int>("test_graph_attr") = 2;
   try {
     pass->Apply(graph.release());
-  } catch (paddle::platform::EnforceNotMet e) {
+  } catch (paddle::platform::EnforceNotMet& e) {
     exception = std::string(e.what());
   }
   ASSERT_TRUE(exception.find("shouldn't have cycle") != exception.npos);

paddle/fluid/framework/op_desc.cc

@@ -702,7 +702,7 @@ void OpDesc::InferShape(const BlockDesc &block) const {
       VLOG(10) << sout.str();
     }
     infer_shape(&ctx);
-  } catch (platform::EnforceNotMet exception) {
+  } catch (platform::EnforceNotMet &exception) {
     framework::InsertCallStackInfo(Type(), attrs_, &exception);
     throw std::move(exception);
   } catch (...) {

paddle/fluid/framework/op_registry_test.cc

@@ -115,7 +115,7 @@ TEST(OpRegistry, IllegalAttr) {
   bool caught = false;
   try {
     paddle::framework::OpRegistry::CreateOp(op_desc);
-  } catch (paddle::platform::EnforceNotMet err) {
+  } catch (paddle::platform::EnforceNotMet& err) {
     caught = true;
     std::string msg = "larger_than check fail";
     std::string err_msg = err.what();
@@ -149,7 +149,7 @@ TEST(OpRegistry, CustomChecker) {
   bool caught = false;
   try {
     paddle::framework::OpRegistry::CreateOp(op_desc);
-  } catch (paddle::platform::EnforceNotMet err) {
+  } catch (paddle::platform::EnforceNotMet& err) {
     caught = true;
     std::string msg = "Attribute 'test_attr' is required!";
     std::string err_msg = err.what();
@@ -165,7 +165,7 @@ TEST(OpRegistry, CustomChecker) {
   caught = false;
   try {
     paddle::framework::OpRegistry::CreateOp(op_desc);
-  } catch (paddle::platform::EnforceNotMet err) {
+  } catch (paddle::platform::EnforceNotMet& err) {
     caught = true;
     std::string msg = "'test_attr' must be even!";
     std::string err_msg = err.what();

paddle/fluid/framework/operator.cc

@@ -170,7 +170,7 @@ void OperatorBase::Run(const Scope& scope, const platform::Place& place) {
       RunImpl(scope, place);
     }
     VLOG(3) << place << " " << DebugStringEx(&scope);
-  } catch (platform::EnforceNotMet exception) {
+  } catch (platform::EnforceNotMet& exception) {
     framework::InsertCallStackInfo(Type(), Attrs(), &exception);
     throw std::move(exception);
   } catch (platform::EOFException&) {

paddle/fluid/framework/tensor_test.cc

@@ -36,7 +36,7 @@ TEST(Tensor, DataAssert) {
   bool caught = false;
   try {
     src_tensor.data<double>();
-  } catch (platform::EnforceNotMet err) {
+  } catch (platform::EnforceNotMet& err) {
     caught = true;
     std::string ex_msg = err.what();
     EXPECT_TRUE(ex_msg.find("holder_ should not be null\nTensor holds no "
@@ -151,7 +151,7 @@ TEST(Tensor, ShareDataWith) {
     bool caught = false;
     try {
       dst_tensor.ShareDataWith(src_tensor);
-    } catch (paddle::platform::EnforceNotMet err) {
+    } catch (paddle::platform::EnforceNotMet& err) {
       caught = true;
       std::string ex_msg = err.what();
       EXPECT_TRUE(ex_msg.find("holder_ should not be null\nTensor holds no "

paddle/fluid/framework/threadpool.h

@@ -17,9 +17,11 @@ limitations under the License. */
 #include <condition_variable>  // NOLINT
 #include <functional>
 #include <future>  // NOLINT
-#include <mutex>   // NOLINT
+#include <memory>
+#include <mutex>  // NOLINT
 #include <queue>
 #include <thread>  // NOLINT
+#include <utility>
 #include <vector>
 #include "glog/logging.h"
 #include "paddle/fluid/platform/enforce.h"
@@ -72,7 +74,7 @@ class ThreadPool {
     Task task([fn]() -> std::unique_ptr<platform::EnforceNotMet> {
       try {
         fn();
-      } catch (platform::EnforceNotMet ex) {
+      } catch (platform::EnforceNotMet& ex) {
         return std::unique_ptr<platform::EnforceNotMet>(
             new platform::EnforceNotMet(ex));
       } catch (const std::exception& e) {

paddle/fluid/platform/enforce_test.cc

@@ -29,7 +29,7 @@ TEST(ENFORCE, FAILED) {
   bool caught_exception = false;
   try {
     PADDLE_ENFORCE(false, "Enforce is not ok %d at all", 123);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Enforce is not ok 123 at all") !=
@@ -40,7 +40,7 @@ TEST(ENFORCE, FAILED) {
   caught_exception = false;
   try {
     PADDLE_ENFORCE(false, "Enforce is not ok at all");
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Enforce is not ok at all") != std::string::npos);
@@ -50,7 +50,7 @@ TEST(ENFORCE, FAILED) {
   caught_exception = false;
   try {
     PADDLE_ENFORCE(false);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     EXPECT_NE(std::string(error.what()).find("  at "), 0);
   }
@@ -70,7 +70,7 @@ TEST(ENFORCE_EQ, NO_EXTRA_MSG_FAIL) {
   bool caught_exception = false;
   try {
     PADDLE_ENFORCE_EQ(a, 1 + 3);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Expected a == 1 + 3, but received a:2 != 1 "
@@ -84,7 +84,7 @@ TEST(ENFORCE_EQ, EXTRA_MSG_FAIL) {
   bool caught_exception = false;
   try {
     PADDLE_ENFORCE_EQ(a, 1 + 3, "%s size not match", "their");
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Expected a == 1 + 3, but received a:2 != 1 + "
@@ -103,7 +103,7 @@ TEST(ENFORCE_NE, FAIL) {
   try {
     // 2UL here to check data type compatible
     PADDLE_ENFORCE_NE(1.0, 1UL);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Expected 1.0 != 1UL, but "
@@ -117,7 +117,7 @@ TEST(ENFORCE_GT, FAIL) {
   bool caught_exception = false;
   try {
     PADDLE_ENFORCE_GT(1, 2);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Expected 1 > 2, but received 1:1 <= 2:2.") !=
@@ -135,7 +135,7 @@ TEST(ENFORCE_GE, FAIL) {
   bool caught_exception = false;
   try {
     PADDLE_ENFORCE_GE(1, 2);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Expected 1 >= 2, but received 1:1 < 2:2.") !=
@@ -155,7 +155,7 @@ TEST(ENFORCE_LE, FAIL) {
   bool caught_exception = false;
   try {
     PADDLE_ENFORCE_GT(1, 2);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Expected 1 > 2, but received 1:1 <= 2:2.") !=
@@ -173,7 +173,7 @@ TEST(ENFORCE_LT, FAIL) {
   bool caught_exception = false;
   try {
     PADDLE_ENFORCE_LT(1UL, 0.12);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("Expected 1UL < 0.12, but "
@@ -193,7 +193,7 @@ TEST(ENFORCE_NOT_NULL, FAIL) {
   try {
     int* a = nullptr;
     PADDLE_ENFORCE_NOT_NULL(a);
-  } catch (paddle::platform::EnforceNotMet error) {
+  } catch (paddle::platform::EnforceNotMet& error) {
     caught_exception = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("a should not be null") != std::string::npos);
@@ -247,7 +247,7 @@ TEST(EOF_EXCEPTION, THROW_EOF) {
   bool caught_eof = false;
   try {
     PADDLE_THROW_EOF();
-  } catch (paddle::platform::EOFException error) {
+  } catch (paddle::platform::EOFException& error) {
     caught_eof = true;
     std::string ex_msg = error.what();
     EXPECT_TRUE(ex_msg.find("There is no next data.") != std::string::npos);

patches/cares/ares_parse_ptr_reply.c.txt

+
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ */
+
+#include "ares_setup.h"
+
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+#ifdef HAVE_NETDB_H
+#  include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+#  include <arpa/nameser.h>
+#else
+#  include "nameser.h"
+#endif
+#ifdef HAVE_ARPA_NAMESER_COMPAT_H
+#  include <arpa/nameser_compat.h>
+#endif
+
+#ifdef HAVE_STRINGS_H
+#  include <strings.h>
+#endif
+
+#include "ares.h"
+#include "ares_dns.h"
+#include "ares_nowarn.h"
+#include "ares_private.h"
+
+int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr,
+                         int addrlen, int family, struct hostent **host)
+{
+  unsigned int qdcount, ancount;
+  int status, i, rr_type, rr_class, rr_len;
+  long len;
+  const unsigned char *aptr;
+  char *ptrname, *hostname, *rr_name, *rr_data;
+  struct hostent *hostent;
+  int aliascnt = 0;
+  int alias_alloc = 8;
+  char ** aliases;
+  size_t rr_data_len;
+  
+  /* Set *host to NULL for all failure cases. */
+  *host = NULL;
+
+  /* Give up if abuf doesn't have room for a header. */
+  if (alen < HFIXEDSZ)
+    return ARES_EBADRESP;
+
+  /* Fetch the question and answer count from the header. */
+  qdcount = DNS_HEADER_QDCOUNT(abuf);
+  ancount = DNS_HEADER_ANCOUNT(abuf);
+  if (qdcount != 1)
+    return ARES_EBADRESP;
+
+  /* Expand the name from the question, and skip past the question. */
+  aptr = abuf + HFIXEDSZ;
+  status = ares__expand_name_for_response(aptr, abuf, alen, &ptrname, &len);
+  if (status != ARES_SUCCESS)
+    return status;
+  if (aptr + len + QFIXEDSZ > abuf + alen)
+    {
+      ares_free(ptrname);
+      return ARES_EBADRESP;
+    }
+  aptr += len + QFIXEDSZ;
+
+  /* Examine each answer resource record (RR) in turn. */
+  hostname = NULL;
+  aliases = ares_malloc(alias_alloc * sizeof(char *));
+  if (!aliases)
+    {
+      ares_free(ptrname);
+      return ARES_ENOMEM;
+    }
+  for (i = 0; i < (int)ancount; i++)
+    {
+      /* Decode the RR up to the data field. */
+      status = ares__expand_name_for_response(aptr, abuf, alen, &rr_name, &len);
+      if (status != ARES_SUCCESS)
+        break;
+      aptr += len;
+      if (aptr + RRFIXEDSZ > abuf + alen)
+        {
+          ares_free(rr_name);
+          status = ARES_EBADRESP;
+          break;
+        }
+      rr_type = DNS_RR_TYPE(aptr);
+      rr_class = DNS_RR_CLASS(aptr);
+      rr_len = DNS_RR_LEN(aptr);
+      aptr += RRFIXEDSZ;
+      if (aptr + rr_len > abuf + alen)
+        {
+          ares_free(rr_name);
+          status = ARES_EBADRESP;
+          break;
+        }
+
+      if (rr_class == C_IN && rr_type == T_PTR
+          && strcasecmp(rr_name, ptrname) == 0)
+        {
+          /* Decode the RR data and set hostname to it. */
+          status = ares__expand_name_for_response(aptr, abuf, alen, &rr_data,
+                                                  &len);
+          if (status != ARES_SUCCESS)
+            {
+              ares_free(rr_name);
+              break;
+            }
+          if (hostname)
+            ares_free(hostname);
+          hostname = rr_data;
+          rr_data_len = strlen(rr_data)+1;
+          aliases[aliascnt] = ares_malloc(rr_data_len * sizeof(char));
+          if (!aliases[aliascnt])
+            {
+              ares_free(rr_name);
+              status = ARES_ENOMEM;
+              break;
+            }
+          strncpy(aliases[aliascnt], rr_data, rr_data_len);
+          aliascnt++;
+          if (aliascnt >= alias_alloc) {
+            char **ptr;
+            alias_alloc *= 2;
+            ptr = ares_realloc(aliases, alias_alloc * sizeof(char *));
+            if(!ptr) {
+              ares_free(rr_name);
+              status = ARES_ENOMEM;
+              break;
+            }
+            aliases = ptr;
+          }
+        }
+
+      if (rr_class == C_IN && rr_type == T_CNAME)
+        {
+          /* Decode the RR data and replace ptrname with it. */
+          status = ares__expand_name_for_response(aptr, abuf, alen, &rr_data,
+                                                  &len);
+          if (status != ARES_SUCCESS)
+            {
+              ares_free(rr_name);
+              break;
+            }
+          ares_free(ptrname);
+          ptrname = rr_data;
+        }
+
+      ares_free(rr_name);
+      aptr += rr_len;
+      if (aptr > abuf + alen)
+        {  /* LCOV_EXCL_START: already checked above */
+          status = ARES_EBADRESP;
+          break;
+        }  /* LCOV_EXCL_STOP */
+    }
+
+  if (status == ARES_SUCCESS && !hostname)
+    status = ARES_ENODATA;
+  if (status == ARES_SUCCESS)
+    {
+      /* We got our answer.  Allocate memory to build the host entry. */
+      hostent = ares_malloc(sizeof(struct hostent));
+      if (hostent)
+        {
+          hostent->h_addr_list = ares_malloc(2 * sizeof(char *));
+          if (hostent->h_addr_list)
+            {
+              hostent->h_addr_list[0] = ares_malloc(addrlen);
+              if (hostent->h_addr_list[0])
+                {
+                  hostent->h_aliases = ares_malloc((aliascnt+1) * sizeof (char *));
+                  if (hostent->h_aliases)
+                    {
+                      /* Fill in the hostent and return successfully. */
+                      hostent->h_name = hostname;
+                      for (i=0 ; i<aliascnt ; i++)
+                        hostent->h_aliases[i] = aliases[i];
+                      hostent->h_aliases[aliascnt] = NULL;
+                      hostent->h_addrtype = aresx_sitoss(family);
+                      hostent->h_length = aresx_sitoss(addrlen);
+                      memcpy(hostent->h_addr_list[0], addr, addrlen);
+                      hostent->h_addr_list[1] = NULL;
+                      *host = hostent;
+                      ares_free(aliases);
+                      ares_free(ptrname);
+                      return ARES_SUCCESS;
+                    }
+                  ares_free(hostent->h_addr_list[0]);
+                }
+              ares_free(hostent->h_addr_list);
+            }
+          ares_free(hostent);
+        }
+      status = ARES_ENOMEM;
+    }
+  for (i=0 ; i<aliascnt ; i++)
+    if (aliases[i])
+      ares_free(aliases[i]);
+  ares_free(aliases);
+  if (hostname)
+    ares_free(hostname);
+  ares_free(ptrname);
+  return status;
+}

tools/manylinux1/Dockerfile.GCC8

+# A image for building paddle binaries and install
+# Use cuda devel base image for both cpu and gpu environment
+# When you modify it, please be aware of cudnn-runtime version
+# and libcudnn.so.x in paddle/scripts/docker/build.sh
+FROM nvidia/cuda:10.1-cudnn7-devel-ubuntu18.04
+MAINTAINER PaddlePaddle Authors <paddle-dev@baidu.com>
+
+# ENV variables
+ARG WITH_GPU
+ARG WITH_AVX
+ARG WITH_DOC
+ 
+ENV WITH_GPU=${WITH_GPU:-ON}
+ENV WITH_AVX=${WITH_AVX:-ON}
+ENV WITH_DOC=${WITH_DOC:-OFF}
+
+ENV HOME /root
+# Add bash enhancements
+COPY ./paddle/scripts/docker/root/ /root/
+
+# Prepare packages for Python
+RUN apt-get update && \
+ DEBIAN_FRONTEND=noninteractive apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev \
+ libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev \
+ xz-utils tk-dev libffi-dev liblzma-dev
+RUN apt-get install -y python-dev python-pip wget vim git
+
+# install cmake
+WORKDIR /home
+RUN wget https://cmake.org/files/v3.4/cmake-3.4.0-Linux-x86_64.tar.gz
+RUN tar -xvf cmake-3.4.0-Linux-x86_64.tar.gz
+RUN apt install libidn11
+ENV PATH=/home/cmake-3.4.0-Linux-x86_64/bin:$PATH
+WORKDIR /usr/bin
+RUN apt install -y gcc-8 g++-8
+RUN cp gcc gcc.bak
+RUN cp g++ g++.bak
+RUN rm gcc
+RUN rm g++
+RUN ln -s gcc-8 gcc
+RUN ln -s g++-8 g++
+
+# Install Python3.6
+RUN mkdir -p /root/python_build/ && wget -q https://www.sqlite.org/2018/sqlite-autoconf-3250300.tar.gz && \
+    tar -zxf sqlite-autoconf-3250300.tar.gz && cd sqlite-autoconf-3250300 && \
+    ./configure -prefix=/usr/local && make -j8 && make install && cd ../ && rm sqlite-autoconf-3250300.tar.gz && \
+    wget -q https://www.python.org/ftp/python/3.6.9/Python-3.6.9.tgz && \
+    tar -xzf Python-3.6.9.tgz && cd Python-3.6.9 && \
+    CFLAGS="-Wformat" ./configure --prefix=/usr/local/ --enable-shared > /dev/null && \
+    make -j8 > /dev/null && make altinstall > /dev/null
+
+# Install Python3.7
+RUN wget -q https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz && \
+    tar -xzf Python-3.7.0.tgz && cd Python-3.7.0 && \
+    CFLAGS="-Wformat" ./configure --prefix=/usr/local/ --enable-shared > /dev/null && \
+    make -j8 > /dev/null && make altinstall > /dev/null
+
+RUN rm -r /root/python_build
+
+RUN apt-get update && \
+    apt-get install -y --allow-downgrades --allow-change-held-packages \
+    patchelf python3 python3-dev python3-pip \
+    git python-pip python-dev python-opencv openssh-server bison \
+    wget unzip unrar tar xz-utils bzip2 gzip coreutils ntp \
+    curl sed grep graphviz libjpeg-dev zlib1g-dev  \
+    python-matplotlib \
+    automake locales clang-format swig cmake  \
+    liblapack-dev liblapacke-dev \
+    net-tools libtool ccache module-init-tools && \
+    apt-get clean -y
+
+# Install Python2.7.15 to replace original python
+WORKDIR /home
+ENV version=2.7.15
+RUN wget https://www.python.org/ftp/python/$version/Python-$version.tgz
+RUN tar -xvf Python-$version.tgz
+WORKDIR /home/Python-$version
+RUN ./configure --enable-unicode=ucs4 --enable-shared CFLAGS=-fPIC --prefix=/usr/local/python2.7.15
+RUN make && make install
+
+RUN echo "export PATH=/usr/local/python2.7.15/include:${PATH}" >> ~/.bashrc
+RUN echo "export PATH=/usr/local/python2.7.15/bin:${PATH}" >> ~/.bashrc
+RUN echo "export LD_LIBRARY_PATH=/usr/local/python2.7.15/lib:${LD_LIBRARY_PATH}" >> ~/.bashrc
+RUN echo "export CPLUS_INCLUDE_PATH=/usr/local/python2.7.15/include/python2.7:$CPLUS_INCLUDE_PATH" >> ~/.bashrc
+ENV PATH=/usr/local/python2.7.15/include:${PATH}
+ENV PATH=/usr/local/python2.7.15/bin:${PATH}
+ENV LD_LIBRARY_PATH=/usr/local/python2.7.15/lib:${LD_LIBRARY_PATH}
+ENV CPLUS_INCLUDE_PATH=/usr/local/python2.7.15/include/python2.7:$CPLUS_INCLUDE_PATH
+RUN mv /usr/bin/python /usr/bin/python.bak
+RUN ln -s /usr/local/python2.7.15/bin/python2.7 /usr/local/bin/python
+RUN ln -s /usr/local/python2.7.15/bin/python2.7 /usr/bin/python
+WORKDIR /home
+RUN wget https://files.pythonhosted.org/packages/b0/d1/8acb42f391cba52e35b131e442e80deffbb8d0676b93261d761b1f0ef8fb/setuptools-40.6.2.zip
+RUN apt-get -y install unzip
+RUN unzip setuptools-40.6.2.zip
+WORKDIR /home/setuptools-40.6.2
+RUN python setup.py build
+RUN python setup.py install
+WORKDIR /home
+RUN wget https://files.pythonhosted.org/packages/69/81/52b68d0a4de760a2f1979b0931ba7889202f302072cc7a0d614211bc7579/pip-18.0.tar.gz
+RUN tar -zxvf pip-18.0.tar.gz
+WORKDIR pip-18.0
+RUN python setup.py install
+
+WORKDIR /home
+RUN rm Python-$version.tgz setuptools-40.6.2.zip pip-18.0.tar.gz && \
+    rm -r Python-$version setuptools-40.6.2 pip-18.0
+
+# git credential to skip password typing
+RUN git config --global credential.helper store
+
+# Fix locales to en_US.UTF-8
+RUN localedef -i en_US -f UTF-8 en_US.UTF-8
+
+# specify sphinx version as 1.5.6 and remove -U option for [pip install -U
+# sphinx-rtd-theme] since -U option will cause sphinx being updated to newest
+# version(1.7.1 for now), which causes building documentation failed.
+RUN pip3 --no-cache-dir install -U wheel py-cpuinfo==5.0.0 && \
+    pip3 --no-cache-dir install -U docopt PyYAML sphinx==1.5.6 && \
+    pip3 --no-cache-dir install sphinx-rtd-theme==0.1.9 recommonmark && \
+    pip3.6 --no-cache-dir install -U wheel py-cpuinfo==5.0.0 && \
+    pip3.6 --no-cache-dir install -U docopt PyYAML sphinx==1.5.6 && \
+    pip3.6 --no-cache-dir install sphinx-rtd-theme==0.1.9 recommonmark && \
+    pip3.7 --no-cache-dir install -U wheel py-cpuinfo==5.0.0 && \
+    pip3.7 --no-cache-dir install -U docopt PyYAML sphinx==1.5.6 && \
+    pip3.7 --no-cache-dir install sphinx-rtd-theme==0.1.9 recommonmark && \
+    pip --no-cache-dir install -U wheel py-cpuinfo==5.0.0 && \
+    pip --no-cache-dir install -U docopt PyYAML sphinx==1.5.6 && \
+    pip --no-cache-dir install sphinx-rtd-theme==0.1.9 recommonmark
+
+RUN pip3 --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
+    pip3 --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
+    pip3 --no-cache-dir install opencv-python && \
+    pip3.6 --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
+    pip3.6 --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
+    pip3.6 --no-cache-dir install opencv-python && \
+    pip3.7 --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
+    pip3.7 --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
+    pip3.7 --no-cache-dir install opencv-python && \
+    pip --no-cache-dir install 'pre-commit==1.10.4' 'ipython==5.3.0' && \
+    pip --no-cache-dir install 'ipykernel==4.6.0' 'jupyter==1.0.0' && \
+    pip --no-cache-dir install opencv-python
+
+#For docstring checker
+RUN pip3 --no-cache-dir install pylint pytest astroid isort
+RUN pip3.6 --no-cache-dir install pylint pytest astroid isort
+RUN pip3.7 --no-cache-dir install pylint pytest astroid isort
+RUN pip --no-cache-dir install pylint pytest astroid isort LinkChecker
+
+RUN pip3 --no-cache-dir install coverage
+RUN pip3.6 --no-cache-dir install coverage
+RUN pip3.7 --no-cache-dir install coverage
+RUN pip --no-cache-dir install coverage
+
+COPY ./python/requirements.txt /root/
+RUN pip3 --no-cache-dir install -r /root/requirements.txt
+RUN pip3.6 --no-cache-dir install -r /root/requirements.txt
+RUN pip3.7 --no-cache-dir install -r /root/requirements.txt
+RUN pip --no-cache-dir install -r /root/requirements.txt
+
+# To fix https://github.com/PaddlePaddle/Paddle/issues/1954, we use
+# the solution in https://urllib3.readthedocs.io/en/latest/user-guide.html#ssl-py2
+RUN apt-get install -y libssl-dev libffi-dev && apt-get clean -y
+RUN pip3 --no-cache-dir install certifi urllib3[secure]
+RUN pip3.6 --no-cache-dir install certifi urllib3[secure]
+RUN pip3.7 --no-cache-dir install certifi urllib3[secure]
+RUN pip --no-cache-dir install certifi urllib3[secure]
+
+RUN echo "export PATH=/usr/lib/ccache:${PATH}" >> ~/.bashrc
+
+# Configure OpenSSH server. c.f. https://docs.docker.com/engine/examples/running_ssh_service
+RUN mkdir /var/run/sshd
+RUN echo 'root:root' | chpasswd
+RUN sed -ri 's/^PermitRootLogin\s+.*/PermitRootLogin yes/' /etc/ssh/sshd_config
+RUN sed -ri 's/UsePAM yes/#UsePAM yes/g' /etc/ssh/sshd_config
+CMD source ~/.bashrc
+EXPOSE 22
+