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2012-04-30, Gary Kramlich
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cleaned up some white space
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@synopsis
AC_PROG_JAVA
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Here
is
a
summary
of
the
main
macros
:
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AC_PROG_JAVAC
:
finds
a
Java
compiler
.
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AC_PROG_JAVA
:
finds
a
Java
virtual
machine
.
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AC_CHECK_CLASS
:
finds
if
we
have
the
given
class
(
beware
of
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CLASSPATH
!
).
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AC_CHECK_RQRD_CLASS
:
finds
if
we
have
the
given
class
and
stops
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otherwise
.
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AC_TRY_COMPILE_JAVA
:
attempt
to
compile
user
given
source
.
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AC_TRY_RUN_JAVA
:
attempt
to
compile
and
run
user
given
source
.
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AC_JAVA_OPTIONS
:
adds
Java
configure
options
.
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AC_PROG_JAVA
tests
an
existing
Java
virtual
machine
.
It
uses
the
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environment
variable
JAVA
then
tests
in
sequence
various
common
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Java
virtual
machines
.
For
political
reasons
,
it
starts
with
the
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free
ones
.
You
*
must
*
call
[
AC_PROG_JAVAC
]
before
.
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If
you
want
to
force
a
specific
VM
:
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-
at
the
configure
.
in
level
,
set
JAVA
=
yourvm
before
calling
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AC_PROG_JAVA
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(
but
after
AC_INIT
)
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-
at
the
configure
level
,
setenv
JAVA
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You
can
use
the
JAVA
variable
in
your
Makefile
.
in
,
with
@JAVA
@
.
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*
Warning
*
:
its
success
or
failure
can
depend
on
a
proper
setting
of
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the
CLASSPATH
env
.
variable
.
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TODO
:
allow
to
exclude
virtual
machines
(
rationale
:
most
Java
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programs
cannot
run
with
some
VM
like
kaffe
).
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Note
:
This
is
part
of
the
set
of
autoconf
M4
macros
for
Java
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programs
.
It
is
VERY
IMPORTANT
that
you
download
the
whole
set
,
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some
macros
depend
on
other
.
Unfortunately
,
the
autoconf
archive
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does
not
support
the
concept
of
set
of
macros
,
so
I
had
to
break
it
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for
submission
.
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A
Web
page
,
with
a
link
to
the
latest
CVS
snapshot
is
at
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<
http
:
//
www
.
internatif
.
org
/
bortzmeyer
/
autoconf
-
Java
/>
.
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This
is
a
sample
configure
.
in
Process
this
file
with
autoconf
to
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produce
a
configure
script
.
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AC_INIT
(
UnTag
.
java
)
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Checks
for
programs
.
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AC_CHECK_CLASSPATH
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AC_PROG_JAVAC
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AC_PROG_JAVA
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Checks
for
classes
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AC_CHECK_RQRD_CLASS
(
org
.
xml
.
sax
.
Parser
)
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AC_CHECK_RQRD_CLASS
(
com
.
jclark
.
xml
.
sax
.
Driver
)
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AC_OUTPUT
(
Makefile
)
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@category
Java
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@author
Stephane
Bortzmeyer
<
bortzmeyer
@pasteur
.
fr
>
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@version
2000
-
07
-
19
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@license
GPLWithACException
AC_DEFUN
(
[
AC_PROG_JAVA
]
,
[
AC_REQUIRE([AC_EXEEXT
]
)
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if
test
x
$
JAVAPREFIX
=
x
;
then
test
x
$
JAVA
=
x
&&
AC_CHECK_PROGS
(
JAVA
,
kaffe
$
EXEEXT
java
$
EXEEXT
)
else
test
x
$
JAVA
=
x
&&
AC_CHECK_PROGS
(
JAVA
,
kaffe
$
EXEEXT
java
$
EXEEXT
,
$
JAVAPREFIX
)
fi
test
x
$
JAVA
=
x
&&
AC_MSG_ERROR
(
[
no acceptable Java virtual machine found in \$PATH
]
)
AC_PROG_JAVA_WORKS
AC_PROVIDE
(
[
$0
]
)
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]
)