dbm.m4

一套很值得分析的短信SMS开发源代码。是我今年早些时候从taobao上买来的。但我现在也没看完（先说清楚

dnl if present: sets apu_db_header, apu_db_lib, and apu_db_version
dnl
AC_DEFUN(APU_CHECK_DB42, [
  places=$1
  if test -z "$places"; then
    places="std /usr/local/BerkeleyDB.4.2 /boot/home/config"
  fi
  APU_CHECK_BERKELEY_DB("4", "2", "-1",
    "$places",
    "db42/db.h db4/db.h db.h",
    "db-4.2 db4 db"
  )
  if test "$apu_have_db" = "1"; then
    apu_db_version=4
  fi
])
dnl
dnl APU_CHECK_DB43: is DB4.3 present?
dnl
dnl if present: sets apu_db_header, apu_db_lib, and apu_db_version
dnl
AC_DEFUN(APU_CHECK_DB43, [
  places=$1
  if test -z "$places"; then
    places="std /usr/local/BerkeleyDB.4.3 /boot/home/config"
  fi
  APU_CHECK_BERKELEY_DB("4", "3", "-1",
    "$places",
    "db43/db.h db4/db.h db.h",
    "db-4.3 db43 db4 db"
  )
  if test "$apu_have_db" = "1"; then
    apu_db_version=4
  fi
])


AC_DEFUN(APU_CHECK_DB, [
  requested=$1
  check_places=$2

  case "$requested" in
  db)
    APU_CHECK_DB_ALL("$check_places")
    if test "$apu_have_db" = "0"; then
      AC_MSG_ERROR(Berkeley db requested, but not found)
    fi
    ;;
  db1)
    APU_CHECK_DB1("$check_places")
    if test "$apu_db_version" != "1"; then
      AC_MSG_ERROR(Berkeley db1 not found)
    fi
    ;;
  db185)
    APU_CHECK_DB185("$check_places")
    if test "$apu_db_version" != "185"; then
      AC_MSG_ERROR(Berkeley db185 not found)
    fi
    ;;
  db2)
    APU_CHECK_DB2("$check_places")
    if test "$apu_db_version" != "2"; then
      AC_MSG_ERROR(Berkeley db2 not found)
    fi
    ;;
  db3)
    APU_CHECK_DB3("$check_places")
    if test "$apu_db_version" != "3"; then
      AC_MSG_ERROR(Berkeley db3 not found)
    fi
    ;;
  db4)
    APU_CHECK_DB4("$check_places")
    if test "$apu_db_version" != "4"; then
      AC_MSG_ERROR(Berkeley db4 not found)
    fi
    ;;
  db41)
    APU_CHECK_DB41("$check_places")
    if test "$apu_db_version" != "4"; then
      AC_MSG_ERROR(Berkeley db4 not found)
    fi
    ;;
  db42)
    APU_CHECK_DB42("$check_places")
    if test "$apu_db_version" != "4"; then
      AC_MSG_ERROR(Berkeley db4 not found)
    fi
    ;;
  db43)
    APU_CHECK_DB43("$check_places")
    if test "$apu_db_version" != "4"; then
      AC_MSG_ERROR(Berkeley db4 not found)
    fi
    ;;
  default)
    APU_CHECK_DB_ALL("$check_places")
    ;;
  esac
])

dnl
dnl APU_CHECK_DB_ALL: Try all Berkeley DB versions, from 4.3 to 1.
dnl
AC_DEFUN(APU_CHECK_DB_ALL, [
  all_places=$1
 
  APU_CHECK_DB43("$all_places")
  if test "$apu_db_version" != "4"; then
    APU_CHECK_DB42("$all_places")
    if test "$apu_db_version" != "4"; then
      APU_CHECK_DB41("$all_places")
      if test "$apu_db_version" != "4"; then
        APU_CHECK_DB4("$all_places")
        if test "$apu_db_version" != "4"; then
          APU_CHECK_DB3("$all_places")
          if test "$apu_db_version" != "3"; then
            APU_CHECK_DB2("$all_places")
            if test "$apu_db_version" != "2"; then
              APU_CHECK_DB1("$all_places")
              if test "$apu_db_version" != "1"; then
                APU_CHECK_DB185("$all_places")
              fi
            fi
          fi
        fi
      fi
    fi
  fi
  AC_MSG_CHECKING(for Berkeley DB)
  if test "$apu_have_db" = "1"; then
    AC_MSG_RESULT(found db$apu_db_version)
  else
    AC_MSG_RESULT(not found)
  fi
])


dnl
dnl APU_CHECK_DBM: see what kind of DBM backend to use for apr_dbm.
dnl
AC_DEFUN(APU_CHECK_DBM, [
  apu_use_sdbm=0
  apu_use_ndbm=0
  apu_use_gdbm=0
  apu_use_db=0
  dnl it's in our codebase
  apu_have_sdbm=1
  apu_have_gdbm=0
  apu_have_ndbm=0
  apu_have_db=0

  apu_db_header=db.h                # default so apu_select_dbm.h is syntactically correct
  apu_db_version=0

  AC_ARG_WITH(dbm, [
    --with-dbm=DBM          choose the DBM type to use.
      DBM={sdbm,gdbm,ndbm,db,db1,db185,db2,db3,db4,db41,db42,db43}
  ], [
    if test "$withval" = "yes"; then
      AC_MSG_ERROR([--with-dbm needs to specify a DBM type to use.
        One of: sdbm, gdbm, ndbm, db, db1, db185, db2, db3, db4, db41, db42, db43])
    fi
    requested="$withval"
  ], [
    requested=default
  ])

  AC_ARG_WITH([gdbm], [
    --with-gdbm=DIR          specify GDBM location
  ], [
    apu_have_gdbm=0
    if test "$withval" = "yes"; then
      AC_CHECK_HEADER(gdbm.h, AC_CHECK_LIB(gdbm, gdbm_open, [apu_have_gdbm=1]))
    elif test "$withval" = "no"; then
      apu_have_gdbm=0
    else
      CPPFLAGS="-I$withval/include"
      LIBS="-L$withval/lib "

      AC_MSG_CHECKING(checking for gdbm in $withval)
      AC_CHECK_HEADER(gdbm.h, AC_CHECK_LIB(gdbm, gdbm_open, [apu_have_gdbm=1]))
      if test "$apu_have_gdbm" != "0"; then
        APR_ADDTO(APRUTIL_LDFLAGS, [-L$withval/lib])
        APR_ADDTO(APRUTIL_INCLUDES, [-I$withval/include])
      fi
    fi
  ], [
    apu_have_gdbm=0
    AC_CHECK_HEADER(gdbm.h, AC_CHECK_LIB(gdbm, gdbm_open, [apu_have_gdbm=1]))
  ])

  AC_ARG_WITH([ndbm], [
    --with-ndbm=PATH 
      Find the NDBM header and library in \`PATH/include' and 
      \`PATH/lib'.  If PATH is of the form \`HEADER:LIB', then search 
      for header files in HEADER, and the library in LIB.  If you omit
      the \`=PATH' part completely, the configure script will search
      for NDBM in a number of standard places.
  ], [
    apu_have_ndbm=0
    if test "$withval" = "yes"; then
      AC_MSG_CHECKING(checking for ndbm in the usual places)
      apu_want_ndbm=1
      NDBM_INC=""
      NDBM_LDFLAGS=""
    elif test "$withval" = "no"; then
      apu_want_ndbm=0
    else
      apu_want_ndbm=1
      case "$withval" in
        *":"*)
          NDBM_INC="-I`echo $withval |sed -e 's/:.*$//'`"
          NDBM_LDFLAGS="-L`echo $withval |sed -e 's/^.*://'`"
          AC_MSG_CHECKING(checking for ndbm includes with $NDBM_INC libs with $NDBM_LDFLAGS )
        ;;
        *)
          NDBM_INC="-I$withval/include"
          NDBM_LDFLAGS="-L$withval/lib"
          AC_MSG_CHECKING(checking for ndbm includes in $withval)
        ;;
      esac
    fi

    save_cppflags="$CPPFLAGS"
    save_ldflags="$LDFLAGS"
    CPPFLAGS="$CPPFLAGS $NDBM_INC"
    LDFLAGS="$LDFLAGS $NDBM_LDFLAGS"
    dnl db_ndbm_open is what sleepcat's compatibility library actually has in it's lib
    if test "$apu_want_ndbm" != "0"; then
      AC_CHECK_HEADER(ndbm.h, 
        AC_CHECK_LIB(c, dbm_open, [apu_have_ndbm=1;apu_ndbm_lib=c],
          AC_CHECK_LIB(dbm, dbm_open, [apu_have_ndbm=1;apu_ndbm_lib=dbm],
            AC_CHECK_LIB(db, dbm_open, [apu_have_ndbm=1;apu_ndbm_lib=db],
              AC_CHECK_LIB(db, __db_ndbm_open, [apu_have_ndbm=1;apu_ndbm_lib=db])
            )
          )
        )
      )
      if test "$apu_have_ndbm" != "0";  then
        if test "$withval" != "yes"; then
          APR_ADDTO(APRUTIL_INCLUDES, [$NDBM_INC])
          APR_ADDTO(APRUTIL_LDFLAGS, [$NDBM_LDFLAGS])
        fi
      elif test "$withval" != "yes"; then
        AC_ERROR( NDBM not found in the specified directory)
      fi
    fi
    CPPFLAGS="$save_cppflags"
    LDFLAGS="$save_ldflags"
  ], [
    dnl don't check it no one has asked us for it
    apu_have_ndbm=0
  ])


  if test -n "$apu_db_xtra_libs"; then
    saveddbxtralibs="$LIBS"
    LIBS="$apu_db_xtra_libs $LIBS"
  fi

  dnl We're going to try to find the highest version of Berkeley DB supported.
  AC_ARG_WITH([berkeley-db], [
    --with-berkeley-db=PATH
      Find the Berkeley DB header and library in \`PATH/include' and
      \`PATH/lib'.  If PATH is of the form \`HEADER:LIB', then search
      for header files in HEADER, and the library in LIB.  If you omit
      the \`=PATH' part completely, the configure script will search
      for Berkeley DB in a number of standard places.
  ], [
    if test "$withval" = "yes"; then
      apu_want_db=1
      user_places=""
    elif test "$withval" = "no"; then
      apu_want_db=0
    else
      apu_want_db=1
      user_places="$withval"
    fi

    if test "$apu_want_db" != "0"; then
      APU_CHECK_DB($requested, $user_places)
      if test "$apu_have_db" = "0"; then
        AC_ERROR(Berkeley DB not found.)
      fi
    fi 
  ],[
    APU_CHECK_DB($requested, "")
  ])

  if test -n "$apu_db_xtra_libs"; then
    LIBS="$saveddbxtralibs"
  fi

  case "$requested" in
    sdbm)
      apu_use_sdbm=1
      apu_default_dbm=sdbm
      ;;
    gdbm)
      apu_use_gdbm=1
      apu_default_dbm=gdbm
      ;;
    ndbm)
      apu_use_ndbm=1
      apu_default_dbm=ndbm
      ;;
    db)
      apu_use_db=1
      apu_default_dbm=db
      ;;
    db1)
      apu_use_db=1
      apu_default_dbm=db1
      ;;
    db185)
      apu_use_db=1
      apu_default_dbm=db185
      ;;
    db2)
      apu_use_db=1
      apu_default_dbm=db2
      ;;
    db3)
      apu_use_db=1
      apu_default_dbm=db3
      ;;
    db4)
      apu_use_db=1
      apu_default_dbm=db4
      ;;
    db41)
      apu_use_db=1
      apu_default_dbm=db4
      ;;
    db42)
      apu_use_db=1
      apu_default_dbm=db4
      ;;
    db43)
      apu_use_db=1
      apu_default_dbm=db4
      ;;
    default)
      dnl ### use more sophisticated DBMs for the default?
      apu_default_dbm="sdbm (default)"
      apu_use_sdbm=1
      ;;
    *)
      AC_MSG_ERROR([--with-dbm=$look_for is an unknown DBM type.
        Use one of: sdbm, gdbm, ndbm, db, db1, db185, db2, db3, db4, db41, db42])
      ;;
  esac

  dnl Yes, it'd be nice if we could collate the output in an order
  dnl so that the AC_MSG_CHECKING would be output before the actual
  dnl checks, but it isn't happening now.
  AC_MSG_CHECKING(for default DBM)
  AC_MSG_RESULT($apu_default_dbm)

  AC_SUBST(apu_use_sdbm)
  AC_SUBST(apu_use_gdbm)
  AC_SUBST(apu_use_ndbm)
  AC_SUBST(apu_use_db)

  AC_SUBST(apu_have_sdbm)
  AC_SUBST(apu_have_gdbm)
  AC_SUBST(apu_have_ndbm)
  AC_SUBST(apu_have_db)
  AC_SUBST(apu_db_header)
  AC_SUBST(apu_db_version)

  dnl Since we have already done the AC_CHECK_LIB tests, if we have it, 
  dnl we know the library is there.
  if test "$apu_have_gdbm" = "1"; then
    APR_ADDTO(APRUTIL_EXPORT_LIBS,[-lgdbm])
    APR_ADDTO(APRUTIL_LIBS,[-lgdbm])
  fi

  if test "$apu_have_ndbm" = "1"; then
    APR_ADDTO(APRUTIL_EXPORT_LIBS,[-l$apu_ndbm_lib])
    APR_ADDTO(APRUTIL_LIBS,[-l$apu_ndbm_lib])
  fi

  if test "$apu_have_db" = "1"; then
    APR_ADDTO(APRUTIL_EXPORT_LIBS,[-l$apu_db_lib])
    APR_ADDTO(APRUTIL_LIBS,[-l$apu_db_lib])
    if test -n "apu_db_xtra_libs"; then
      APR_ADDTO(APRUTIL_EXPORT_LIBS,[$apu_db_xtra_libs])
      APR_ADDTO(APRUTIL_LIBS,[$apu_db_xtra_libs])
    fi
  fi
])