javacomp-script, javaexec-script: Add support for disabling Java

[Bruno Haible]

GNU gettext has a configure option --disable-java. This patch adds two dummy
autoconf macros, for implementing this option better.


2022-06-20  Bruno Haible  <bruno@clisp.org>

        javacomp-script, javaexec-script: Add support for disabling Java.
        * m4/javacomp.m4 (gt_JAVACOMP_DISABLED): New macro.
        * m4/javaexec.m4 (gt_JAVAEXEC_DISABLED): New macro.

diff --git a/m4/javacomp.m4 b/m4/javacomp.m4
index 1fd7589f5d..396e0866ed 100644
--- a/m4/javacomp.m4
+++ b/m4/javacomp.m4
@@ -1,4 +1,4 @@
-# javacomp.m4 serial 18
+# javacomp.m4 serial 19
 dnl Copyright (C) 2001-2003, 2006-2007, 2009-2022 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
@@ -736,3 +736,18 @@ changequote([,])dnl
   AC_SUBST([HAVE_JAVAC])
   AC_SUBST([HAVE_JIKES])
 ])
+
+# Simulates gt_JAVACOMP when no Java support is desired.
+AC_DEFUN([gt_JAVACOMP_DISABLED],
+[
+  CONF_JAVAC=
+  HAVE_JAVAC_ENVVAR=
+  HAVE_GCJ_C=
+  HAVE_JAVAC=
+  HAVE_JIKES=
+  AC_SUBST([CONF_JAVAC])
+  AC_SUBST([HAVE_JAVAC_ENVVAR])
+  AC_SUBST([HAVE_GCJ_C])
+  AC_SUBST([HAVE_JAVAC])
+  AC_SUBST([HAVE_JIKES])
+])
diff --git a/m4/javaexec.m4 b/m4/javaexec.m4
index 6ed7f64993..960a15e4c6 100644
--- a/m4/javaexec.m4
+++ b/m4/javaexec.m4
@@ -1,4 +1,4 @@
-# javaexec.m4 serial 7
+# javaexec.m4 serial 8
 dnl Copyright (C) 2001-2003, 2006, 2009-2022 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -102,3 +102,20 @@ AC_DEFUN([gt_JAVAEXEC],
   AC_SUBST([HAVE_JRE])
   AC_SUBST([HAVE_JVIEW])
 ])
+
+# Simulates gt_JAVAEXEC when no Java support is desired.
+AC_DEFUN([gt_JAVAEXEC_DISABLED],
+[
+  CONF_JAVA=
+  HAVE_JAVA_ENVVAR=
+  HAVE_GIJ=
+  HAVE_JAVA=
+  HAVE_JRE=
+  HAVE_JVIEW=
+  AC_SUBST([CONF_JAVA])
+  AC_SUBST([HAVE_JAVA_ENVVAR])
+  AC_SUBST([HAVE_GIJ])
+  AC_SUBST([HAVE_JAVA])
+  AC_SUBST([HAVE_JRE])
+  AC_SUBST([HAVE_JVIEW])
+])