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