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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_prog_javac.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_PROG_JAVAC
#
# DESCRIPTION
#
# AX_PROG_JAVAC tests an existing Java compiler. It uses the environment
# variable JAVAC then tests in sequence various common Java compilers. For
# political reasons, it starts with the free ones.
#
# If you want to force a specific compiler:
#
# - at the configure.in level, set JAVAC=yourcompiler before calling
# AX_PROG_JAVAC
#
# - at the configure level, setenv JAVAC
#
# You can use the JAVAC variable in your Makefile.in, with @JAVAC@.
#
# *Warning*: its success or failure can depend on a proper setting of the
# CLASSPATH env. variable.
#
# TODO: allow to exclude compilers (rationale: most Java programs cannot
# compile with some compilers like guavac).
#
# 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 submission. The
# general documentation, as well as the sample configure.in, is included
# in the AX_PROG_JAVA macro.
#
# LICENSE
#
# Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
#
# This program 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.
#
# This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 8
AU_ALIAS([AC_PROG_JAVAC], [AX_PROG_JAVAC])
AC_DEFUN([AX_PROG_JAVAC],[
m4_define([m4_ax_prog_javac_list],["gcj -C" guavac jikes javac])dnl
AS_IF([test "x$JAVAPREFIX" = x],
[test "x$JAVAC" = x && AC_CHECK_PROGS([JAVAC], [m4_ax_prog_javac_list])],
[test "x$JAVAC" = x && AC_CHECK_PROGS([JAVAC], [m4_ax_prog_javac_list], [], [$JAVAPREFIX/bin])])
m4_undefine([m4_ax_prog_javac_list])dnl
test "x$JAVAC" = x && AC_MSG_ERROR([no acceptable Java compiler found in \$PATH])
AX_PROG_JAVAC_WORKS
AC_PROVIDE([$0])dnl
])
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