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Posted to commits@hawq.apache.org by wa...@apache.org on 2015/10/19 04:47:16 UTC

incubator-hawq git commit: HAWQ-66. check libxml2 in configure

Repository: incubator-hawq
Updated Branches:
  refs/heads/master c3003ec5e -> 6061349ae


HAWQ-66. check libxml2 in configure


Project: http://git-wip-us.apache.org/repos/asf/incubator-hawq/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-hawq/commit/6061349a
Tree: http://git-wip-us.apache.org/repos/asf/incubator-hawq/tree/6061349a
Diff: http://git-wip-us.apache.org/repos/asf/incubator-hawq/diff/6061349a

Branch: refs/heads/master
Commit: 6061349ae52980ff37b804b5784e208c630235c5
Parents: c3003ec
Author: Zhanwei Wang <wa...@apache.org>
Authored: Fri Oct 16 21:52:40 2015 +0800
Committer: Zhanwei Wang <wa...@apache.org>
Committed: Mon Oct 19 10:38:29 2015 +0800

----------------------------------------------------------------------
 aclocal.m4       |   1 +
 config/libxml.m4 | 188 ++++++++++++++++++++++++++++++++++
 configure        | 273 ++++++++++++++++++++++++++++++++++++++++++++++++++
 configure.in     |   5 +
 4 files changed, 467 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/incubator-hawq/blob/6061349a/aclocal.m4
----------------------------------------------------------------------
diff --git a/aclocal.m4 b/aclocal.m4
index df6ee3a..80dfe03 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -6,6 +6,7 @@ m4_include([config/c-library.m4])
 m4_include([config/docbook.m4])
 m4_include([config/general.m4])
 m4_include([config/libtool.m4])
+m4_include([config/libxml.m4])
 m4_include([config/perl.m4])
 m4_include([config/programs.m4])
 m4_include([config/python.m4])

http://git-wip-us.apache.org/repos/asf/incubator-hawq/blob/6061349a/config/libxml.m4
----------------------------------------------------------------------
diff --git a/config/libxml.m4 b/config/libxml.m4
new file mode 100644
index 0000000..68cd824
--- /dev/null
+++ b/config/libxml.m4
@@ -0,0 +1,188 @@
+# Configure paths for LIBXML2
+# Mike Hommey 2004-06-19
+# use CPPFLAGS instead of CFLAGS
+# Toshio Kuratomi 2001-04-21
+# Adapted from:
+# Configure paths for GLIB
+# Owen Taylor     97-11-3
+
+dnl AM_PATH_XML2([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
+dnl Test for XML, and define XML_CPPFLAGS and XML_LIBS
+dnl
+AC_DEFUN([AM_PATH_XML2],[ 
+AC_ARG_WITH(xml-prefix,
+            [  --with-xml-prefix=PFX   Prefix where libxml is installed (optional)],
+            xml_config_prefix="$withval", xml_config_prefix="")
+AC_ARG_WITH(xml-exec-prefix,
+            [  --with-xml-exec-prefix=PFX Exec prefix where libxml is installed (optional)],
+            xml_config_exec_prefix="$withval", xml_config_exec_prefix="")
+AC_ARG_ENABLE(xmltest,
+              [  --disable-xmltest       Do not try to compile and run a test LIBXML program],,
+              enable_xmltest=yes)
+
+  if test x$xml_config_exec_prefix != x ; then
+     xml_config_args="$xml_config_args"
+     if test x${XML2_CONFIG+set} != xset ; then
+        XML2_CONFIG=$xml_config_exec_prefix/bin/xml2-config
+     fi
+  fi
+  if test x$xml_config_prefix != x ; then
+     xml_config_args="$xml_config_args --prefix=$xml_config_prefix"
+     if test x${XML2_CONFIG+set} != xset ; then
+        XML2_CONFIG=$xml_config_prefix/bin/xml2-config
+     fi
+  fi
+
+  AC_PATH_PROG(XML2_CONFIG, xml2-config, no)
+  min_xml_version=ifelse([$1], ,2.0.0,[$1])
+  AC_MSG_CHECKING(for libxml - version >= $min_xml_version)
+  no_xml=""
+  if test "$XML2_CONFIG" = "no" ; then
+    no_xml=yes
+  else
+    XML_CPPFLAGS=`$XML2_CONFIG $xml_config_args --cflags`
+    XML_LIBS=`$XML2_CONFIG $xml_config_args --libs`
+    xml_config_major_version=`$XML2_CONFIG $xml_config_args --version | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+    xml_config_minor_version=`$XML2_CONFIG $xml_config_args --version | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+    xml_config_micro_version=`$XML2_CONFIG $xml_config_args --version | \
+           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+    if test "x$enable_xmltest" = "xyes" ; then
+      ac_save_CPPFLAGS="$CPPFLAGS"
+      ac_save_LIBS="$LIBS"
+      CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"
+      LIBS="$XML_LIBS $LIBS"
+dnl
+dnl Now check if the installed libxml is sufficiently new.
+dnl (Also sanity checks the results of xml2-config to some extent)
+dnl
+      rm -f conf.xmltest
+      AC_TRY_RUN([
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <libxml/xmlversion.h>
+
+int 
+main()
+{
+  int xml_major_version, xml_minor_version, xml_micro_version;
+  int major, minor, micro;
+  char *tmp_version;
+
+  system("touch conf.xmltest");
+
+  /* Capture xml2-config output via autoconf/configure variables */
+  /* HP/UX 9 (%@#!) writes to sscanf strings */
+  tmp_version = (char *)strdup("$min_xml_version");
+  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
+     printf("%s, bad version string from xml2-config\n", "$min_xml_version");
+     exit(1);
+   }
+   free(tmp_version);
+
+   /* Capture the version information from the header files */
+   tmp_version = (char *)strdup(LIBXML_DOTTED_VERSION);
+   if (sscanf(tmp_version, "%d.%d.%d", &xml_major_version, &xml_minor_version, &xml_micro_version) != 3) {
+     printf("%s, bad version string from libxml includes\n", "LIBXML_DOTTED_VERSION");
+     exit(1);
+   }
+   free(tmp_version);
+
+ /* Compare xml2-config output to the libxml headers */
+  if ((xml_major_version != $xml_config_major_version) ||
+      (xml_minor_version != $xml_config_minor_version) ||
+      (xml_micro_version != $xml_config_micro_version))
+    {
+      printf("*** libxml header files (version %d.%d.%d) do not match\n",
+         xml_major_version, xml_minor_version, xml_micro_version);
+      printf("*** xml2-config (version %d.%d.%d)\n",
+         $xml_config_major_version, $xml_config_minor_version, $xml_config_micro_version);
+      return 1;
+    } 
+/* Compare the headers to the library to make sure we match */
+  /* Less than ideal -- doesn't provide us with return value feedback, 
+   * only exits if there's a serious mismatch between header and library.
+   */
+    LIBXML_TEST_VERSION;
+
+    /* Test that the library is greater than our minimum version */
+    if ((xml_major_version > major) ||
+        ((xml_major_version == major) && (xml_minor_version > minor)) ||
+        ((xml_major_version == major) && (xml_minor_version == minor) &&
+        (xml_micro_version >= micro)))
+      {
+        return 0;
+       }
+     else
+      {
+        printf("\n*** An old version of libxml (%d.%d.%d) was found.\n",
+               xml_major_version, xml_minor_version, xml_micro_version);
+        printf("*** You need a version of libxml newer than %d.%d.%d. The latest version of\n",
+           major, minor, micro);
+        printf("*** libxml is always available from ftp://ftp.xmlsoft.org.\n");
+        printf("***\n");
+        printf("*** If you have already installed a sufficiently new version, this error\n");
+        printf("*** probably means that the wrong copy of the xml2-config shell script is\n");
+        printf("*** being found. The easiest way to fix this is to remove the old version\n");
+        printf("*** of LIBXML, but you can also set the XML2_CONFIG environment to point to the\n");
+        printf("*** correct copy of xml2-config. (In this case, you will have to\n");
+        printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");
+        printf("*** so that the correct libraries are found at run-time))\n");
+    }
+  return 1;
+}
+],, no_xml=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
+       CPPFLAGS="$ac_save_CPPFLAGS"
+       LIBS="$ac_save_LIBS"
+     fi
+  fi
+
+  if test "x$no_xml" = x ; then
+     AC_MSG_RESULT(yes (version $xml_config_major_version.$xml_config_minor_version.$xml_config_micro_version))
+     ifelse([$2], , :, [$2])     
+  else
+     AC_MSG_RESULT(no)
+     if test "$XML2_CONFIG" = "no" ; then
+       echo "*** The xml2-config script installed by LIBXML could not be found"
+       echo "*** If libxml was installed in PREFIX, make sure PREFIX/bin is in"
+       echo "*** your path, or set the XML2_CONFIG environment variable to the"
+       echo "*** full path to xml2-config."
+     else
+       if test -f conf.xmltest ; then
+        :
+       else
+          echo "*** Could not run libxml test program, checking why..."
+          CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"
+          LIBS="$LIBS $XML_LIBS"
+          AC_TRY_LINK([
+#include <libxml/xmlversion.h>
+#include <stdio.h>
+],      [ LIBXML_TEST_VERSION; return 0;],
+        [ echo "*** The test program compiled, but did not run. This usually means"
+          echo "*** that the run-time linker is not finding LIBXML or finding the wrong"
+          echo "*** version of LIBXML. If it is not finding LIBXML, you'll need to set your"
+          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
+          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
+          echo "*** is required on your system"
+          echo "***"
+          echo "*** If you have an old version installed, it is best to remove it, although"
+          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH" ],
+        [ echo "*** The test program failed to compile or link. See the file config.log for the"
+          echo "*** exact error that occured. This usually means LIBXML was incorrectly installed"
+          echo "*** or that you have moved LIBXML since it was installed. In the latter case, you"
+          echo "*** may want to edit the xml2-config script: $XML2_CONFIG" ])
+          CPPFLAGS="$ac_save_CPPFLAGS"
+          LIBS="$ac_save_LIBS"
+       fi
+     fi
+
+     XML_CPPFLAGS=""
+     XML_LIBS=""
+     ifelse([$3], , :, [$3])
+  fi
+  AC_SUBST(XML_CPPFLAGS)
+  AC_SUBST(XML_LIBS)
+  rm -f conf.xmltest
+])

http://git-wip-us.apache.org/repos/asf/incubator-hawq/blob/6061349a/configure
----------------------------------------------------------------------
diff --git a/configure b/configure
index b4c7a54..8dea6e1 100755
--- a/configure
+++ b/configure
@@ -655,6 +655,9 @@ acx_pthread_config
 LIBOBJS
 HAVE_IPV6
 APR_CONFIG
+XML_LIBS
+XML_CPPFLAGS
+XML2_CONFIG
 CXXCPP
 ac_ct_CXX
 CXXFLAGS
@@ -864,6 +867,9 @@ with_system_tzdata
 with_zlib
 with_rt
 with_gnu_ld
+with_xml_prefix
+with_xml_exec_prefix
+enable_xmltest
 enable_largefile
 '
       ac_precious_vars='build_alias
@@ -1517,6 +1523,7 @@ build with coverage testing instrumentation
   --enable-orca        enable Pivotal Query Optimizer
   --disable-thread-safety  Do not make client libraries thread-safe
   --enable-thread-safety-force  force thread-safety despite thread test failure
+  --disable-xmltest       Do not try to compile and run a test LIBXML program
   --disable-largefile     omit support for large files
 
 Optional Packages:
@@ -1548,6 +1555,8 @@ Optional Packages:
   --without-zlib          do not use Zlib
   --without-rt            do not use Realtime Library
   --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
+  --with-xml-prefix=PFX   Prefix where libxml is installed (optional)
+  --with-xml-exec-prefix=PFX Exec prefix where libxml is installed (optional)
 
 Some influential environment variables:
   CC          C compiler command
@@ -10941,6 +10950,270 @@ else
 fi
 
 
+# libxml2
+
+
+
+# Check whether --with-xml-prefix was given.
+if test "${with_xml_prefix+set}" = set; then :
+  withval=$with_xml_prefix; xml_config_prefix="$withval"
+else
+  xml_config_prefix=""
+fi
+
+
+# Check whether --with-xml-exec-prefix was given.
+if test "${with_xml_exec_prefix+set}" = set; then :
+  withval=$with_xml_exec_prefix; xml_config_exec_prefix="$withval"
+else
+  xml_config_exec_prefix=""
+fi
+
+# Check whether --enable-xmltest was given.
+if test "${enable_xmltest+set}" = set; then :
+  enableval=$enable_xmltest;
+else
+  enable_xmltest=yes
+fi
+
+
+  if test x$xml_config_exec_prefix != x ; then
+     xml_config_args="$xml_config_args"
+     if test x${XML2_CONFIG+set} != xset ; then
+        XML2_CONFIG=$xml_config_exec_prefix/bin/xml2-config
+     fi
+  fi
+  if test x$xml_config_prefix != x ; then
+     xml_config_args="$xml_config_args --prefix=$xml_config_prefix"
+     if test x${XML2_CONFIG+set} != xset ; then
+        XML2_CONFIG=$xml_config_prefix/bin/xml2-config
+     fi
+  fi
+
+  # Extract the first word of "xml2-config", so it can be a program name with args.
+set dummy xml2-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_XML2_CONFIG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $XML2_CONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_XML2_CONFIG="$XML2_CONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_XML2_CONFIG="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_path_XML2_CONFIG" && ac_cv_path_XML2_CONFIG="no"
+  ;;
+esac
+fi
+XML2_CONFIG=$ac_cv_path_XML2_CONFIG
+if test -n "$XML2_CONFIG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $XML2_CONFIG" >&5
+$as_echo "$XML2_CONFIG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  min_xml_version=2.7.6
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libxml - version >= $min_xml_version" >&5
+$as_echo_n "checking for libxml - version >= $min_xml_version... " >&6; }
+  no_xml=""
+  if test "$XML2_CONFIG" = "no" ; then
+    no_xml=yes
+  else
+    XML_CPPFLAGS=`$XML2_CONFIG $xml_config_args --cflags`
+    XML_LIBS=`$XML2_CONFIG $xml_config_args --libs`
+    xml_config_major_version=`$XML2_CONFIG $xml_config_args --version | \
+           sed 's/\([0-9]*\).\([0-9]*\).\([0-9]*\)/\1/'`
+    xml_config_minor_version=`$XML2_CONFIG $xml_config_args --version | \
+           sed 's/\([0-9]*\).\([0-9]*\).\([0-9]*\)/\2/'`
+    xml_config_micro_version=`$XML2_CONFIG $xml_config_args --version | \
+           sed 's/\([0-9]*\).\([0-9]*\).\([0-9]*\)/\3/'`
+    if test "x$enable_xmltest" = "xyes" ; then
+      ac_save_CPPFLAGS="$CPPFLAGS"
+      ac_save_LIBS="$LIBS"
+      CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"
+      LIBS="$XML_LIBS $LIBS"
+      rm -f conf.xmltest
+      if test "$cross_compiling" = yes; then :
+  echo $ac_n "cross compiling; assumed OK... $ac_c"
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <libxml/xmlversion.h>
+
+int
+main()
+{
+  int xml_major_version, xml_minor_version, xml_micro_version;
+  int major, minor, micro;
+  char *tmp_version;
+
+  system("touch conf.xmltest");
+
+  /* Capture xml2-config output via autoconf/configure variables */
+  /* HP/UX 9 (%@#!) writes to sscanf strings */
+  tmp_version = (char *)strdup("$min_xml_version");
+  if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
+     printf("%s, bad version string from xml2-config\n", "$min_xml_version");
+     exit(1);
+   }
+   free(tmp_version);
+
+   /* Capture the version information from the header files */
+   tmp_version = (char *)strdup(LIBXML_DOTTED_VERSION);
+   if (sscanf(tmp_version, "%d.%d.%d", &xml_major_version, &xml_minor_version, &xml_micro_version) != 3) {
+     printf("%s, bad version string from libxml includes\n", "LIBXML_DOTTED_VERSION");
+     exit(1);
+   }
+   free(tmp_version);
+
+ /* Compare xml2-config output to the libxml headers */
+  if ((xml_major_version != $xml_config_major_version) ||
+      (xml_minor_version != $xml_config_minor_version) ||
+      (xml_micro_version != $xml_config_micro_version))
+    {
+      printf("*** libxml header files (version %d.%d.%d) do not match\n",
+         xml_major_version, xml_minor_version, xml_micro_version);
+      printf("*** xml2-config (version %d.%d.%d)\n",
+         $xml_config_major_version, $xml_config_minor_version, $xml_config_micro_version);
+      return 1;
+    }
+/* Compare the headers to the library to make sure we match */
+  /* Less than ideal -- doesn't provide us with return value feedback,
+   * only exits if there's a serious mismatch between header and library.
+   */
+    LIBXML_TEST_VERSION;
+
+    /* Test that the library is greater than our minimum version */
+    if ((xml_major_version > major) ||
+        ((xml_major_version == major) && (xml_minor_version > minor)) ||
+        ((xml_major_version == major) && (xml_minor_version == minor) &&
+        (xml_micro_version >= micro)))
+      {
+        return 0;
+       }
+     else
+      {
+        printf("\n*** An old version of libxml (%d.%d.%d) was found.\n",
+               xml_major_version, xml_minor_version, xml_micro_version);
+        printf("*** You need a version of libxml newer than %d.%d.%d. The latest version of\n",
+           major, minor, micro);
+        printf("*** libxml is always available from ftp://ftp.xmlsoft.org.\n");
+        printf("***\n");
+        printf("*** If you have already installed a sufficiently new version, this error\n");
+        printf("*** probably means that the wrong copy of the xml2-config shell script is\n");
+        printf("*** being found. The easiest way to fix this is to remove the old version\n");
+        printf("*** of LIBXML, but you can also set the XML2_CONFIG environment to point to the\n");
+        printf("*** correct copy of xml2-config. (In this case, you will have to\n");
+        printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");
+        printf("*** so that the correct libraries are found at run-time))\n");
+    }
+  return 1;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+
+else
+  no_xml=yes
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+       CPPFLAGS="$ac_save_CPPFLAGS"
+       LIBS="$ac_save_LIBS"
+     fi
+  fi
+
+  if test "x$no_xml" = x ; then
+     { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes (version $xml_config_major_version.$xml_config_minor_version.$xml_config_micro_version)" >&5
+$as_echo "yes (version $xml_config_major_version.$xml_config_minor_version.$xml_config_micro_version)" >&6; }
+     :
+  else
+     { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+     if test "$XML2_CONFIG" = "no" ; then
+       echo "*** The xml2-config script installed by LIBXML could not be found"
+       echo "*** If libxml was installed in PREFIX, make sure PREFIX/bin is in"
+       echo "*** your path, or set the XML2_CONFIG environment variable to the"
+       echo "*** full path to xml2-config."
+     else
+       if test -f conf.xmltest ; then
+        :
+       else
+          echo "*** Could not run libxml test program, checking why..."
+          CPPFLAGS="$CPPFLAGS $XML_CPPFLAGS"
+          LIBS="$LIBS $XML_LIBS"
+          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <libxml/xmlversion.h>
+#include <stdio.h>
+
+int
+main ()
+{
+ LIBXML_TEST_VERSION; return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+   echo "*** The test program compiled, but did not run. This usually means"
+          echo "*** that the run-time linker is not finding LIBXML or finding the wrong"
+          echo "*** version of LIBXML. If it is not finding LIBXML, you'll need to set your"
+          echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
+          echo "*** to the installed location  Also, make sure you have run ldconfig if that"
+          echo "*** is required on your system"
+          echo "***"
+          echo "*** If you have an old version installed, it is best to remove it, although"
+          echo "*** you may also be able to get things to work by modifying LD_LIBRARY_PATH"
+else
+   echo "*** The test program failed to compile or link. See the file config.log for the"
+          echo "*** exact error that occured. This usually means LIBXML was incorrectly installed"
+          echo "*** or that you have moved LIBXML since it was installed. In the latter case, you"
+          echo "*** may want to edit the xml2-config script: $XML2_CONFIG"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+          CPPFLAGS="$ac_save_CPPFLAGS"
+          LIBS="$ac_save_LIBS"
+       fi
+     fi
+
+     XML_CPPFLAGS=""
+     XML_LIBS=""
+     as_fn_error $? "libxml2 is required" "$LINENO" 5
+  fi
+
+
+  rm -f conf.xmltest
+
+pgac_args="$pgac_args with_xml_prefix with_xml_exec_prefix enable_xmltest"
+CFLAGS="$CFLAGS $XML_CPPFLAGS"
 
 # libhdfs3
 

http://git-wip-us.apache.org/repos/asf/incubator-hawq/blob/6061349a/configure.in
----------------------------------------------------------------------
diff --git a/configure.in b/configure.in
index 1a35284..8c7ae10 100644
--- a/configure.in
+++ b/configure.in
@@ -1221,6 +1221,11 @@ fi
 AC_CHECK_HEADERS(json/json.h, [], [AC_MSG_ERROR([json-c is required])])
 AC_SEARCH_LIBS(json_tokener_parse, json, [], [AC_MSG_ERROR([json-c is required])], [])
 
+# libxml2
+
+AM_PATH_XML2([2.7.6], [], [AC_MSG_ERROR([libxml2 is required])])
+pgac_args="$pgac_args with_xml_prefix with_xml_exec_prefix enable_xmltest"
+CFLAGS="$CFLAGS $XML_CPPFLAGS"
 
 # libhdfs3