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    sqlite_dir="$1"
    sqlite_include="$1/include/sqlite3.h"
  fi

  save_CPPFLAGS="$CPPFLAGS"
  save_LDFLAGS="$LDFLAGS"

  if test ! -z "$1"; then
    CPPFLAGS="$CPPFLAGS -I$sqlite_dir/include"
    LDFLAGS="$LDFLAGS -L$sqlite_dir/lib"
  fi

  AC_CHECK_HEADER(sqlite3.h,
    [
      AC_MSG_CHECKING([sqlite library version (via header)])
      AC_EGREP_CPP(SQLITE_VERSION_OKAY,[
#include "$sqlite_include"
#if SQLITE_VERSION_NUMBER >= $sqlite_min_ver_num
SQLITE_VERSION_OKAY
#endif],
                  [AC_MSG_RESULT([okay])
                   AC_CHECK_LIB(sqlite3, sqlite3_close, [
                      svn_lib_sqlite="yes"
                      if test -z "$sqlite_dir" -o ! -d "$sqlite_dir"; then
                        SVN_SQLITE_LIBS="-lsqlite3"
                      else
                        SVN_SQLITE_INCLUDES="-I$sqlite_dir/include"
                        SVN_SQLITE_LIBS="`SVN_REMOVE_STANDARD_LIB_DIRS(-L$sqlite_dir/lib -lsqlite3)`"
                      fi
                  ])], [AC_MSG_RESULT([unsupported SQLite version])])
    ])

  CPPFLAGS="$save_CPPFLAGS"
  LDFLAGS="$save_LDFLAGS"
])

dnl SVN_SQLITE_FILE_CONFIG(sqlite_file)
dnl
dnl Check to see if we've got an appropriate sqlite amalgamation file
dnl at sqlite_file.  If not, fail.
AC_DEFUN(SVN_SQLITE_FILE_CONFIG,
[
  sqlite_amalg="$1"
  AC_MSG_CHECKING([sqlite amalgamation])
  if test ! -e $sqlite_amalg; then
    AC_MSG_RESULT([no])
  else
    AC_MSG_RESULT([yes])
    AC_MSG_CHECKING([sqlite amalgamation file version])
    AC_EGREP_CPP(SQLITE_VERSION_OKAY,[
#include "$sqlite_amalg"
#if SQLITE_VERSION_NUMBER >= $sqlite_min_ver_num
SQLITE_VERSION_OKAY
#endif],
                 [AC_MSG_RESULT([amalgamation found and is okay])
                  _SVN_SQLITE_DSO_LIBS
                  AC_DEFINE(SVN_SQLITE_INLINE, 1,
                  [Defined if svn should use the amalgamated version of sqlite])
                  SVN_SQLITE_INCLUDES="-I`dirname $sqlite_amalg`"
                  if test -n "$svn_sqlite_dso_ldflags"; then
                    SVN_SQLITE_LIBS="$svn_sqlite_dso_ldflags -lpthread"
                  else
                    SVN_SQLITE_LIBS="-lpthread"
                  fi
                  svn_lib_sqlite="yes"],
                 [AC_MSG_RESULT([unsupported amalgamation SQLite version])])
  fi
])

dnl SVN_SQLITE_VERNUM_PARSE(version_string, result_var)
dnl
dnl Parse a x.y[.z] version string version_string into a number result_var.
AC_DEFUN(SVN_SQLITE_VERNUM_PARSE,
[
  version_string="$1"
  
  major=`expr $version_string : '\([[0-9]]*\)'`
  minor=`expr $version_string : '[[0-9]]*\.\([[0-9]]*\)'`
  micro=`expr $version_string : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
  if test -z "$micro"; then
    micro=0
  fi
  $2=`expr $major \* 1000000 \
        \+ $minor \* 1000 \
        \+ $micro`
])

dnl SVN_SQLITE_MIN_VERNUM_PARSE()
dnl
dnl Parse a x.y.z version string SQLITE_MINIMUM_VER into a number
dnl sqlite_min_ver_num.
AC_DEFUN(SVN_SQLITE_MIN_VERNUM_PARSE,
[
  SVN_SQLITE_VERNUM_PARSE([$SQLITE_MINIMUM_VER], [sqlite_min_ver_num])
])

dnl SVN_DOWNLOAD_SQLITE()
dnl no sqlite found, print out a message telling the user what to do
AC_DEFUN(SVN_DOWNLOAD_SQLITE,
[
  echo ""
  echo "An appropriate version of sqlite could not be found.  We recommmend"
  echo "${SQLITE_RECOMMENDED_VER}, but require at least ${SQLITE_MINIMUM_VER}."
  echo "Please either install a newer sqlite on this system"
  echo ""
  echo "or"
  echo ""
  echo "get the sqlite ${SQLITE_RECOMMENDED_VER} amalgamation from:"
  echo "    ${SQLITE_URL}"
  echo "unpack the archive using unzip and rename the resulting"
  echo "directory to:"
  echo "$abs_srcdir/sqlite-amalgamation"
  if test x"$abs_srcdir" != x"$abs_builddir"; then
    echo "or to:"
    echo "$abs_builddir/sqlite-amalgamation"
  fi
  echo ""
  AC_MSG_ERROR([Subversion requires SQLite])
])

dnl _SVN_SQLITE_DSO_LIBS() dnl Find additional libraries that the
dnl sqlite amalgamation code should link in order to load
dnl shared libraries.  Copied from build/libtool.m4