HGKeeper

dnl @synopsis AC_CHECK_CLASS

dnl

dnl AC_CHECK_CLASS tests the existence of a given Java class, either in

dnl a jar or in a '.class' file.

dnl

dnl *Warning*: its success or failure can depend on a proper setting of

dnl the CLASSPATH env. variable.

dnl

dnl Note: This is part of the set of autoconf M4 macros for Java

dnl programs. It is VERY IMPORTANT that you download the whole set,

dnl some macros depend on other. Unfortunately, the autoconf archive

dnl does not support the concept of set of macros, so I had to break it

dnl for submission. The general documentation, as well as the sample

dnl configure.in, is included in the AC_PROG_JAVA macro.

dnl

dnl @category Java

dnl @author Stephane Bortzmeyer <bortzmeyer@pasteur.fr>

dnl @version 2000-07-19

dnl @license GPLWithACException

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

yv66vgADAC0AKQcAAgEABFRlc3QHAAQBABBqYXZhL2xhbmcvT2JqZWN0AQAE

bWFpbgEAFihbTGphdmEvbGFuZy9TdHJpbmc7KVYBAARDb2RlAQAPTGluZU51

bWJlclRhYmxlDAAKAAsBAANlcnIBABVMamF2YS9pby9QcmludFN0cmVhbTsJ

AA0ACQcADgEAEGphdmEvbGFuZy9TeXN0ZW0IABABABBNaXNzaW5nIGFyZ3Vt

ZW50DAASABMBAAdwcmludGxuAQAVKExqYXZhL2xhbmcvU3RyaW5nOylWCgAV

ABEHABYBABNqYXZhL2lvL1ByaW50U3RyZWFtDAAYABkBAARleGl0AQAEKEkp

VgoADQAXDAAcAB0BAAdmb3JOYW1lAQAlKExqYXZhL2xhbmcvU3RyaW5nOylM

amF2YS9sYW5nL0NsYXNzOwoAHwAbBwAgAQAPamF2YS9sYW5nL0NsYXNzBwAi

AQAgamF2YS9sYW5nL0NsYXNzTm90Rm91bmRFeGNlcHRpb24BAAY8aW5pdD4B

AAMoKVYMACMAJAoAAwAlAQAKU291cmNlRmlsZQEACVRlc3QuamF2YQAhAAEA

AwAAAAAAAgAJAAUABgABAAcAAABtAAMAAwAAACkqvgSiABCyAAwSD7YAFBBN

uAAaKgMyuAAeTKcACE0EuAAaAUwDuAAasQABABMAGgAdACEAAQAIAAAAKgAK

AAAACgAAAAsABgANAA4ADgATABAAEwASAB4AFgAiABgAJAAZACgAGgABACMA

JAABAAcAAAAhAAEAAQAAAAUqtwAmsQAAAAEACAAAAAoAAgAAAAQABAAEAAEA

JwAAAAIAKA==

====

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

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"

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"])

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])

])

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)

])

grim/guifications3