# libxml.m4 serial 6 (gettext-0.18.2)

dnl Copyright (C) 2006, 2008, 2015 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

dnl From Bruno Haible.

AC_DEFUN([gl_LIBXML],

[

  AC_REQUIRE([AM_ICONV_LINK])

  AC_MSG_CHECKING([whether included libxml is requested])

  AC_ARG_WITH([included-libxml],

    [  --with-included-libxml  use the libxml2 included here],

    [gl_cv_libxml_force_included=$withval],

    [gl_cv_libxml_force_included=no])

  AC_MSG_RESULT([$gl_cv_libxml_force_included])

  gl_cv_libxml_use_included="$gl_cv_libxml_force_included"

  LIBXML=

  LTLIBXML=

  INCXML=

  if test "$gl_cv_libxml_use_included" != yes; then

    dnl Figure out whether we can use a preinstalled libxml2, or have to use

    dnl the included one.

    AC_CACHE_VAL([gl_cv_libxml], [

      gl_cv_libxml=no

      gl_cv_LIBXML=

      gl_cv_LTLIBXML=

      gl_cv_INCXML=

      gl_save_LIBS="$LIBS"

      LIBS="$LIBS $LIBICONV"

      dnl Search for libxml2 and define LIBXML2, LTLIBXML2 and INCXML2

      dnl accordingly.

      dnl Don't use xml2-config nor pkg-config, since it doesn't work when

      dnl cross-compiling or when the C compiler in use is different from the

      dnl one that built the library.

      dnl Use a test program that tries to invoke xmlFree. On Cygwin 1.7.x,

      dnl libxml2 is built in such a way that uses of xmlFree work fine with

      dnl -Wl,--enable-auto-import but lead to a link error with

      dnl -Wl,--disable-auto-import.

      AC_LIB_LINKFLAGS_BODY([xml2])

      LIBS="$gl_save_LIBS $LIBXML2 $LIBICONV"

      AC_TRY_LINK([#include <libxml/xmlversion.h>

                   #include <libxml/xmlmemory.h>

                  ],

        [xmlCheckVersion (0); xmlFree ((void *) 0);],

        [gl_cv_libxml=yes

         gl_cv_LIBXML="$LIBXML2 $LIBICONV"

         gl_cv_LTLIBXML="$LTLIBXML2 $LTLIBICONV"

        ])

      if test "$gl_cv_libxml" != yes; then

        gl_save_CPPFLAGS="$CPPFLAGS"

        CPPFLAGS="$CPPFLAGS $INCXML2"

        AC_TRY_LINK([#include <libxml/xmlversion.h>

                     #include <libxml/xmlmemory.h>

                    ],

          [xmlCheckVersion (0); xmlFree ((void *) 0);],

          [gl_cv_libxml=yes

           gl_cv_LIBXML="$LIBXML2 $LIBICONV"

           gl_cv_LTLIBXML="$LTLIBXML2 $LTLIBICONV"

           gl_cv_INCXML="$INCXML2"

          ])

        if test "$gl_cv_libxml" != yes; then

          dnl Often the include files are installed in /usr/include/libxml2.

          dnl In libxml2-2.5, <libxml/xmlversion.h> is self-contained.

          dnl In libxml2-2.6, it includes <libxml/xmlexports.h> which is

          dnl self-contained.

          libxml2_include_dir=

          AC_TRY_CPP([#include <libxml2/libxml/xmlexports.h>],

            [gl_ABSOLUTE_HEADER([libxml2/libxml/xmlexports.h])

             libxml2_include_dir=`echo "$gl_cv_absolute_libxml2_libxml_xmlexports_h" | sed -e 's,.libxml.xmlexports\.h$,,'`

            ])

          if test -z "$libxml2_include_dir"; then

            AC_TRY_CPP([#include <libxml2/libxml/xmlversion.h>],

              [gl_ABSOLUTE_HEADER([libxml2/libxml/xmlversion.h])

               libxml2_include_dir=`echo "$gl_cv_absolute_libxml2_libxml_xmlversion_h" | sed -e 's,.libxml.xmlversion\.h$,,'`

              ])

          fi

          if test -n "$libxml2_include_dir" && test -d "$libxml2_include_dir"; then

            CPPFLAGS="$gl_save_CPPFLAGS -I$libxml2_include_dir"

            AC_TRY_LINK([#include <libxml/xmlversion.h>

                         #include <libxml/xmlmemory.h>

                        ],

              [xmlCheckVersion (0); xmlFree ((void *) 0);],

              [gl_cv_libxml=yes

               gl_cv_LIBXML="$LIBXML2 $LIBICONV"

               gl_cv_LTLIBXML="$LTLIBXML2 $LTLIBICONV"

               gl_cv_INCXML="-I$libxml2_include_dir"

              ])

          fi

        fi

        CPPFLAGS="$gl_save_CPPFLAGS"

      fi

      LIBS="$gl_save_LIBS"

    ])

    AC_MSG_CHECKING([for libxml])

    AC_MSG_RESULT([$gl_cv_libxml])

    if test $gl_cv_libxml = yes; then

      LIBXML="$gl_cv_LIBXML"

      LTLIBXML="$gl_cv_LTLIBXML"

      INCXML="$gl_cv_INCXML"

    else

      gl_cv_libxml_use_included=yes

    fi

  fi

  AC_SUBST([LIBXML])

  AC_SUBST([LTLIBXML])

  AC_SUBST([INCXML])

  AC_MSG_CHECKING([whether to use the included libxml])

  AC_MSG_RESULT([$gl_cv_libxml_use_included])

  if test "$gl_cv_libxml_use_included" = yes; then

    LIBXML_H=

    LIBXML_H="$LIBXML_H libxml/DOCBparser.h"

    LIBXML_H="$LIBXML_H libxml/HTMLparser.h"

    LIBXML_H="$LIBXML_H libxml/HTMLtree.h"

    LIBXML_H="$LIBXML_H libxml/SAX2.h"

    LIBXML_H="$LIBXML_H libxml/SAX.h"

    LIBXML_H="$LIBXML_H libxml/c14n.h"

    LIBXML_H="$LIBXML_H libxml/catalog.h"

    LIBXML_H="$LIBXML_H libxml/chvalid.h"

    LIBXML_H="$LIBXML_H libxml/debugXML.h"

    LIBXML_H="$LIBXML_H libxml/dict.h"

    LIBXML_H="$LIBXML_H libxml/encoding.h"

    LIBXML_H="$LIBXML_H libxml/entities.h"

    LIBXML_H="$LIBXML_H libxml/globals.h"

    LIBXML_H="$LIBXML_H libxml/hash.h"

    LIBXML_H="$LIBXML_H libxml/list.h"

    LIBXML_H="$LIBXML_H libxml/nanoftp.h"

    LIBXML_H="$LIBXML_H libxml/nanohttp.h"

    LIBXML_H="$LIBXML_H libxml/parser.h"

    LIBXML_H="$LIBXML_H libxml/parserInternals.h"

    LIBXML_H="$LIBXML_H libxml/pattern.h"

    LIBXML_H="$LIBXML_H libxml/relaxng.h"

    LIBXML_H="$LIBXML_H libxml/schemasInternals.h"

    LIBXML_H="$LIBXML_H libxml/schematron.h"

    LIBXML_H="$LIBXML_H libxml/threads.h"

    LIBXML_H="$LIBXML_H libxml/tree.h"

    LIBXML_H="$LIBXML_H libxml/uri.h"

    LIBXML_H="$LIBXML_H libxml/valid.h"

    LIBXML_H="$LIBXML_H libxml/xinclude.h"

    LIBXML_H="$LIBXML_H libxml/xlink.h"

    LIBXML_H="$LIBXML_H libxml/xmlIO.h"

    LIBXML_H="$LIBXML_H libxml/xmlautomata.h"

    LIBXML_H="$LIBXML_H libxml/xmlerror.h"

    LIBXML_H="$LIBXML_H libxml/xmlexports.h"

    LIBXML_H="$LIBXML_H libxml/xmlmemory.h"

    LIBXML_H="$LIBXML_H libxml/xmlmodule.h"

    LIBXML_H="$LIBXML_H libxml/xmlreader.h"

    LIBXML_H="$LIBXML_H libxml/xmlregexp.h"

    LIBXML_H="$LIBXML_H libxml/xmlsave.h"

    LIBXML_H="$LIBXML_H libxml/xmlschemas.h"

    LIBXML_H="$LIBXML_H libxml/xmlschemastypes.h"

    LIBXML_H="$LIBXML_H libxml/xmlstring.h"

    LIBXML_H="$LIBXML_H libxml/xmlunicode.h"

    LIBXML_H="$LIBXML_H libxml/xmlversion.h"

    LIBXML_H="$LIBXML_H libxml/xmlwriter.h"

    LIBXML_H="$LIBXML_H libxml/xpath.h"

    LIBXML_H="$LIBXML_H libxml/xpathInternals.h"

    LIBXML_H="$LIBXML_H libxml/xpointer.h"

    AC_CHECK_HEADERS([arpa/inet.h ctype.h dlfcn.h dl.h errno.h \

                      fcntl.h float.h limits.h malloc.h math.h netdb.h \

                      netinet/in.h signal.h stdlib.h string.h \

                      strings.h sys/select.h sys/socket.h sys/stat.h \

                      sys/time.h sys/types.h time.h unistd.h])

    AC_CHECK_HEADERS([arpa/nameser.h], [], [], [

      #if HAVE_SYS_TYPES_H

      # include <sys/types.h>

      #endif

    ])

    AC_CHECK_HEADERS([resolv.h], [], [], [

      #if HAVE_SYS_TYPES_H

      # include <sys/types.h>

      #endif

      #if HAVE_NETINET_IN_H

      # include <netinet/in.h>

      #endif 

      #if HAVE_ARPA_NAMESER_H 

      # include <arpa/nameser.h>

      #endif

    ])

    AC_CHECK_FUNCS([dlopen getaddrinfo localtime shlload stat _stat strftime])

    dnl This relies on the va_copy replacement from the stdarg module.

    AC_DEFINE([VA_COPY], [va_copy],

      [Define to a working va_copy macro or replacement.])

    dnl Don't bother checking for pthread.h and other multithread facilities.

    dnl Don't bother checking for zlib.h and how to link with libz.

  else

    LIBXML_H=

  fi

  AC_SUBST([LIBXML_H])

  AM_CONDITIONAL([INCLUDED_LIBXML],

    [test "$gl_cv_libxml_use_included" = yes])

])