The R Project SVN R

### java.m4 -- macros for Java environment detection    -*- Autoconf -*-

###

### Copyright (C) 2005 R Core Team

###

### This file is part of R.

###

### R is free software; you can redistribute it and/or modify it under

### the terms of the GNU General Public License as published by the Free

### Software Foundation; either version 2 of the License, or (at your

### option) any later version.

###

### R is distributed in the hope that it will be useful, but WITHOUT ANY

### WARRANTY; without even the implied warranty of MERCHANTABILITY or

### FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public

### License for more details.

###

### You should have received a copy of the GNU General Public License

### along with R; if not, you can obtain it via the World Wide Web at

### `http://www.gnu.org/copyleft/gpl.html', or by writing to the Free

### Software Foundation, 59 Temple Place -- Suite 330, Boston, MA

### 02111-3307, USA.

## R_RUN_JAVA(variable for the result, parameters)

## ----------

## runs the java interpreter ${JAVA_PROG} with specified parameters and

## saves the output to the supplied variable. The exit value is ignored.

AC_DEFUN([R_RUN_JAVA],

[

  acx_java_result=

  if test -z "${JAVA_PROG}"; then

    echo "$as_me:$LINENO: JAVA_PROG is not set, cannot run java $2" >&AS_MESSAGE_LOG_FD

  else

    echo "$as_me:$LINENO: running ${JAVA_PROG} $2" >&AS_MESSAGE_LOG_FD

    acx_java_result=`${JAVA_PROG} $2 2>&AS_MESSAGE_LOG_FD`

    echo "$as_me:$LINENO: output: '$acx_java_result'" >&AS_MESSAGE_LOG_FD

  fi

  $1=$acx_java_result

])

## R_JAVA

## -----------

## Looks for Java JRE/JDK and sets:

## have_java to yes/no; if it is yes then also sets:

## JAVA_PROG to Java interpreter path

## JAVA_HOME to the home directory of the Java runtime/jdk

## JAVA_LD_PATH to the path necessary for Java runtime

## JAVA_LIBS to flags necessary to link JNI programs (*)

##

## JAVA_HOME env var is honored during the search and the search

## will fail if it is set incorrectly.

AC_DEFUN([R_JAVA],

[

have_java=no

## find java compiler binaries

if test -z "${JAVA_HOME}" ; then

  JAVA_PATH=${PATH}

else

  JAVA_PATH=${JAVA_HOME}:${JAVA_HOME}/bin:${PATH}

fi

## if 'java' is not on the PATH or JAVA_HOME, add some guesses as of

## where java could live

JAVA_PATH=${JAVA_PATH}:/usr/java/bin:/usr/jdk/bin:/usr/lib/java/bin:/usr/lib/jdk/bin:/usr/local/java/bin:/usr/local/jdk/bin:/usr/local/lib/java/bin:/usr/local/lib/jdk/bin

AC_PATH_PROGS(JAVA_PROG,java,,${JAVA_PATH})

## FIXME: we may want to check for jikes, kaffe and others...

AC_PATH_PROGS(JAVAC,javac,,${JAVA_PATH})

## this is where our test-class lives (in tools directory)

getsp_cp=${ac_aux_dir}

AC_MSG_CHECKING([whether Java interpreter works])

acx_java_works=no

if test -n "${JAVA_PROG}" ; then

  R_RUN_JAVA(acx_jc_result,[-classpath ${getsp_cp} getsp -test])

  if test "${acx_jc_result}" = "Test1234OK"; then

    acx_java_works=yes

  fi

  acx_jc_result=

fi

if test ${acx_java_works} = yes; then

  AC_MSG_RESULT([yes])

  AC_MSG_CHECKING([for Java environment])

  ## retrieve JAVA_HOME from Java itself if not set 

  if test -z "${JAVA_HOME}" ; then

    R_RUN_JAVA(JAVA_HOME,[-classpath ${getsp_cp} getsp java.home])

  fi

  ## the availability of JAVA_HOME will tell us whether it's supported

  if test -z "${JAVA_HOME}" ; then

    if test x$acx_java_env_msg != xyes; then

      AC_MSG_RESULT([not found])

    fi

  else

    AC_MSG_RESULT([in ${JAVA_HOME}])

    case "${host_os}" in

      darwin*)

        JAVA_LIBS="-framework JavaVM"

        JAVA_LD_PATH=

        ;;

      *)

        R_RUN_JAVA(JAVA_LIBS, [-classpath ${getsp_cp} getsp -libs])

        JAVA_LIBS="${JAVA_LIBS} -ljvm"

        R_RUN_JAVA(JAVA_LD_PATH, [-classpath ${getsp_cp} getsp java.library.path])

        ;;

    esac

    ## note that we actually don't test JAVA_LIBS - we hope that the detection

    ## was correct. We should also test the functionality for javac.

    have_java=yes

  fi

else

  AC_MSG_RESULT([no])

  JAVA_PROG=

  JAVAC=

  JAVA_HOME=

fi

AC_SUBST(JAVA_HOME)

AC_SUBST(JAVA_PROG)

AC_SUBST(JAVA_LD_PATH)

AC_SUBST(JAVA_LIBS)

])