Bug #25764817: CLEAN UP THE UDF EXAMPLE

Clean up the UDF example to remove some unneeded code and use of headers
internal to MySQL.

Change-Id: Ic7432fb139bd0f04660204eef50e5adc347f317d

Author: Steinar H. Gunderson

cmake/os/SunOS.cmake

@@ -140,28 +140,6 @@ CHECK_C_SOURCE_RUNS(
   }
 "  HAVE_SOLARIS_ATOMIC)
 
-CHECK_CXX_SOURCE_COMPILES("
-    #undef inline
-    #if !defined(_REENTRANT)
-    #define _REENTRANT
-    #endif
-    #include <pthread.h>
-    #include <sys/types.h>
-    #include <sys/socket.h>
-    #include <netinet/in.h>
-    #include <arpa/inet.h>
-    #include <netdb.h>
-    int main()
-    {
-
-       struct hostent *foo =
-       gethostbyaddr_r((const char *) 0,
-          0, 0, (struct hostent *) 0, (char *) NULL,  0, (int *)0);
-       return 0;
-    }
-  "
-  HAVE_SOLARIS_STYLE_GETHOST)
-
 # Check is special processor flag needs to be set on older GCC
 #that defaults to v8 sparc . Code here is taken from my_rdtsc.c 
 IF(CMAKE_COMPILER_IS_GNUCC AND CMAKE_SIZEOF_VOID_P EQUAL 4

cmake/os/WindowsCache.cmake

@@ -1,4 +1,4 @@
-# Copyright (c) 2010, 2016, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -87,7 +87,6 @@ SET(HAVE_DECL_FDATASYNC CACHE INTERNAL "")
 SET(HAVE_FEDISABLEEXCEPT CACHE  INTERNAL "")
 SET(HAVE_FSEEKO CACHE  INTERNAL "")
 SET(HAVE_FSYNC CACHE  INTERNAL "")
-SET(HAVE_GETHOSTBYADDR_R CACHE  INTERNAL "")
 SET(HAVE_GETHRTIME CACHE  INTERNAL "")
 # Check needed HAVE_GETNAMEINFO
 SET(HAVE_GETPASS CACHE  INTERNAL "")

config.h.cmake

@@ -85,7 +85,6 @@
 #cmakedefine HAVE_FEDISABLEEXCEPT 1
 #cmakedefine HAVE_FSEEKO 1
 #cmakedefine HAVE_FSYNC 1
-#cmakedefine HAVE_GETHOSTBYADDR_R 1
 #cmakedefine HAVE_GETHRTIME 1
 #cmakedefine HAVE_GETNAMEINFO 1
 #cmakedefine HAVE_GETPASS 1
@@ -216,7 +215,6 @@
 #cmakedefine HAVE_LINUX_LARGE_PAGES 1
 #cmakedefine HAVE_SOLARIS_LARGE_PAGES 1
 #cmakedefine HAVE_SOLARIS_ATOMIC 1
-#cmakedefine HAVE_SOLARIS_STYLE_GETHOST 1
 #define SYSTEM_TYPE "@SYSTEM_TYPE@"
 /* This should mean case insensitive file system */
 #cmakedefine FN_NO_CASE_SENSE 1

configure.cmake

@@ -361,7 +361,6 @@ CHECK_SYMBOL_EXISTS(fdatasync "unistd.h" HAVE_DECL_FDATASYNC)
 CHECK_FUNCTION_EXISTS (fedisableexcept HAVE_FEDISABLEEXCEPT)
 CHECK_FUNCTION_EXISTS (fseeko HAVE_FSEEKO)
 CHECK_FUNCTION_EXISTS (fsync HAVE_FSYNC)
-CHECK_FUNCTION_EXISTS (gethostbyaddr_r HAVE_GETHOSTBYADDR_R)
 CHECK_FUNCTION_EXISTS (gethrtime HAVE_GETHRTIME)
 CHECK_FUNCTION_EXISTS (getnameinfo HAVE_GETNAMEINFO)
 CHECK_FUNCTION_EXISTS (getpass HAVE_GETPASS)

mysql-test/t/udf.test

@@ -1,8 +1,9 @@
 --source include/have_udf.inc
 #
-# To run this tests the "sql/udf_example.c" need to be compiled into
+# To run this test, "sql/udf_example.cc" need to be compiled into
 # udf_example.so and LD_LIBRARY_PATH should be setup to point out where
-# the library are.
+# the library are. The regular CMake build system takes care of this
+# automatically.
 #