File: ac_prog_java.m4

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dnl @synopsis AC_PROG_JAVA
dnl
dnl Here is a summary of the main macros:
dnl
dnl AC_PROG_JAVAC: finds a Java compiler.
dnl
dnl AC_PROG_JAVA: finds a Java virtual machine.
dnl
dnl AC_CHECK_CLASS: finds if we have the given class (beware of
dnl CLASSPATH!).
dnl
dnl AC_CHECK_RQRD_CLASS: finds if we have the given class and stops
dnl otherwise.
dnl
dnl AC_TRY_COMPILE_JAVA: attempt to compile user given source.
dnl
dnl AC_TRY_RUN_JAVA: attempt to compile and run user given source.
dnl
dnl AC_JAVA_OPTIONS: adds Java configure options.
dnl
dnl AC_PROG_JAVA tests an existing Java virtual machine. It uses the
dnl environment variable JAVA then tests in sequence various common
dnl Java virtual machines. For political reasons, it starts with the
dnl free ones. You *must* call [AC_PROG_JAVAC] before.
dnl
dnl If you want to force a specific VM:
dnl
dnl - at the configure.in level, set JAVA=yourvm before calling
dnl AC_PROG_JAVA
dnl
dnl   (but after AC_INIT)
dnl
dnl - at the configure level, setenv JAVA
dnl
dnl You can use the JAVA variable in your Makefile.in, with @JAVA@.
dnl
dnl *Warning*: its success or failure can depend on a proper setting of
dnl the CLASSPATH env. variable.
dnl
dnl TODO: allow to exclude virtual machines (rationale: most Java
dnl programs cannot run with some VM like kaffe).
dnl
dnl Note: This is part of the set of autoconf M4 macros for Java
dnl programs. It is VERY IMPORTANT that you download the whole set,
dnl some macros depend on other. Unfortunately, the autoconf archive
dnl does not support the concept of set of macros, so I had to break it
dnl for submission.
dnl
dnl A Web page, with a link to the latest CVS snapshot is at
dnl <http://www.internatif.org/bortzmeyer/autoconf-Java/>.
dnl
dnl This is a sample configure.in Process this file with autoconf to
dnl produce a configure script.
dnl
dnl    AC_INIT(UnTag.java)
dnl
dnl    dnl Checks for programs.
dnl    AC_CHECK_CLASSPATH
dnl    AC_PROG_JAVAC
dnl    AC_PROG_JAVA
dnl
dnl    dnl Checks for classes
dnl    AC_CHECK_RQRD_CLASS(org.xml.sax.Parser)
dnl    AC_CHECK_RQRD_CLASS(com.jclark.xml.sax.Driver)
dnl
dnl    AC_OUTPUT(Makefile)
dnl
dnl @category Java
dnl @author Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
dnl @version 2000-07-19
dnl @license GPLWithACException

AC_DEFUN([AC_PROG_JAVA],[
AC_REQUIRE([AC_EXEEXT])dnl
if test x$JAVAPREFIX = x; then
	test x$JAVA = x && AC_CHECK_PROGS(JAVA, kaffe$EXEEXT java$EXEEXT)
else
	test x$JAVA = x && AC_CHECK_PROGS(JAVA, kaffe$EXEEXT java$EXEEXT, $JAVAPREFIX)
fi
test x$JAVA = x && AC_MSG_WARN([no acceptable Java virtual machine found in \$PATH])
AC_PROG_JAVA_WORKS
AC_PROVIDE([$0])dnl
])