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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<title>
Autoconf Macro: ac_check_class
</title>
<link rel="stylesheet" type="text/css" href="ac-archive.css">
</head>
<body>
<table summary="web navigation" style="width:100%;">
<tbody>
<tr>
<td style="width:50%;" align="center">
<a href="http://autoconf-archive.cryp.to/ac_check_class.m4">Download M4
Source</a>
</td>
<td style="width:50%;" align="center">
<a href="macros-by-category.html">Macro Index Page</a>
</td>
</tr>
</tbody>
</table>
<hr>
<h1>
ac_check_class
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AC_CHECK_CLASS</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
AC_CHECK_CLASS tests the existence of a given Java class, either in a jar
or in a '.class' file.
</p>
<p>
*Warning*: its success or failure can depend on a proper setting of the
CLASSPATH env. variable.
</p>
<p>
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
AC_PROG_JAVA macro.
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2000-07-19
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([AC_CHECK_CLASS],[
AC_REQUIRE([AC_PROG_JAVA])
ac_var_name=`echo $1 | sed 's/\./_/g'`
dnl Normaly I'd use a AC_CACHE_CHECK here but since the variable name is
dnl dynamic I need an extra level of extraction
AC_MSG_CHECKING([for $1 class])
AC_CACHE_VAL(ac_cv_class_$ac_var_name, [
if test x$ac_cv_prog_uudecode_base64 = xyes; then
dnl /**
dnl * Test.java: used to test dynamicaly if a class exists.
dnl */
dnl public class Test
dnl {
dnl
dnl public static void
dnl main( String[] argv )
dnl {
dnl Class lib;
dnl if (argv.length < 1)
dnl {
dnl System.err.println ("Missing argument");
dnl System.exit (77);
dnl }
dnl try
dnl {
dnl lib = Class.forName (argv[0]);
dnl }
dnl catch (ClassNotFoundException e)
dnl {
dnl System.exit (1);
dnl }
dnl lib = null;
dnl System.exit (0);
dnl }
dnl
dnl }
cat << \EOF > Test.uue
begin-base64 644 Test.class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====
EOF
if uudecode$EXEEXT Test.uue; then
:
else
echo "configure: __oline__: uudecode had trouble decoding base 64 file 'Test.uue'" >&AC_FD_CC
echo "configure: failed file was:" >&AC_FD_CC
cat Test.uue >&AC_FD_CC
ac_cv_prog_uudecode_base64=no
fi
rm -f Test.uue
if AC_TRY_COMMAND($JAVA $JAVAFLAGS Test $1) >/dev/null 2>&1; then
eval "ac_cv_class_$ac_var_name=yes"
else
eval "ac_cv_class_$ac_var_name=no"
fi
rm -f Test.class
else
AC_TRY_COMPILE_JAVA([$1], , [eval "ac_cv_class_$ac_var_name=yes"],
[eval "ac_cv_class_$ac_var_name=no"])
fi
eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
eval "HAVE_$ac_var_name=$`echo ac_cv_class_$ac_var_val`"
HAVE_LAST_CLASS=$ac_var_val
if test x$ac_var_val = xyes; then
ifelse([$2], , :, [$2])
else
ifelse([$3], , :, [$3])
fi
])
dnl for some reason the above statment didn't fall though here?
dnl do scripts have variable scoping?
eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
AC_MSG_RESULT($ac_var_val)
])
</pre>
</div>
</body>
</html>
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