m4/ax_check_class.m4

   1 # SPDX-License-Identifier: GPL-2.0-or-later WITH LicenseRef-Autoconf-exception-macro
   2 #
   3 # ===========================================================================
   4 #      https://www.gnu.org/software/autoconf-archive/ax_check_class.html
   5 # ===========================================================================
   6 #
   7 # SYNOPSIS
   8 #
   9 #   AX_CHECK_CLASS
  10 #
  11 # DESCRIPTION
  12 #
  13 #   AX_CHECK_CLASS tests the existence of a given Java class, either in a
  14 #   jar or in a '.class' file.
  15 #
  16 #   *Warning*: its success or failure can depend on a proper setting of the
  17 #   CLASSPATH env. variable.
  18 #
  19 #   Note: This is part of the set of autoconf M4 macros for Java programs.
  20 #   It is VERY IMPORTANT that you download the whole set, some macros depend
  21 #   on other. Unfortunately, the autoconf archive does not support the
  22 #   concept of set of macros, so I had to break it for submission. The
  23 #   general documentation, as well as the sample configure.in, is included
  24 #   in the AX_PROG_JAVA macro.
  25 #
  26 # LICENSE
  27 #
  28 #   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
  29 #
  30 #   This program is free software; you can redistribute it and/or modify it
  31 #   under the terms of the GNU General Public License as published by the
  32 #   Free Software Foundation; either version 2 of the License, or (at your
  33 #   option) any later version.
  34 #
  35 #   This program is distributed in the hope that it will be useful, but
  36 #   WITHOUT ANY WARRANTY; without even the implied warranty of
  37 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
  38 #   Public License for more details.
  39 #
  40 #   You should have received a copy of the GNU General Public License along
  41 #   with this program. If not, see <https://www.gnu.org/licenses/>.
  42 #
  43 #   As a special exception, the respective Autoconf Macro's copyright owner
  44 #   gives unlimited permission to copy, distribute and modify the configure
  45 #   scripts that are the output of Autoconf when processing the Macro. You
  46 #   need not follow the terms of the GNU General Public License when using
  47 #   or distributing such scripts, even though portions of the text of the
  48 #   Macro appear in them. The GNU General Public License (GPL) does govern
  49 #   all other use of the material that constitutes the Autoconf Macro.
  50 #
  51 #   This special exception to the GPL applies to versions of the Autoconf
  52 #   Macro released by the Autoconf Archive. When you make and distribute a
  53 #   modified version of the Autoconf Macro, you may extend this special
  54 #   exception to the GPL to apply to your modified version as well.
  55
  56 #serial 12
  57
  58 AU_ALIAS([AC_CHECK_CLASS], [AX_CHECK_CLASS])
  59 AC_DEFUN([AX_CHECK_CLASS],[
  60 AC_REQUIRE([AX_PROG_JAVA])
  61 ac_var_name=`echo $1 | sed 's/\./_/g'`
  62 dnl Normally I'd use a AC_CACHE_CHECK here but since the variable name is
  63 dnl dynamic I need an extra level of extraction
  64 AC_MSG_CHECKING([for $1 class])
  65 AC_CACHE_VAL(ax_cv_class_$ac_var_name, [
  66         AX_TRY_COMPILE_JAVA([$1], , [eval "ac_cv_class_$ac_var_name=yes"],
  67                 [eval "ac_cv_class_$ac_var_name=no"])
  68 eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
  69 eval "HAVE_$ac_var_name=$`echo ac_cv_class_$ac_var_val`"
  70 HAVE_LAST_CLASS=$ac_var_val
  71 if test x$ac_var_val = xyes; then
  72         ifelse([$2], , :, [$2])
  73 else
  74         ifelse([$3], , :, [$3])
  75 fi
  76 ])
  77 dnl for some reason the above statement didn't fall though here?
  78 dnl do scripts have variable scoping?
  79 eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
  80 AC_MSG_RESULT($ac_var_val)
  81 ])