J2ME CLDC on linux with JDK 1.6.0
I downloaded the J2ME CLDC code i.e. j2me_cldc-1_1-fcs-src-winunix.zip
After unpacking the archive I tried a make :
paul@localhost:~/bin/j2me_cldc/build/linux$ make
It started OK before bailing out with lots of character encoding errors such as:
src/com/sun/cldc/util/j2me/CalendarImpl.java:2: warning: unmappable characterfor encoding ASCII
* Copyright ? 2003 Sun Microsystems, Inc. All rights reserved.
^
This seems to be due to the copyright symbol in the headers which isn't supported by ASCII. I got round this by specifying the encoding type in the j2me_cldc/api/Makefile, i.e. :
JAVAC= javac -encoding cp1252
So I tried make j2me again but this time get the following error:
src/java/lang/Object.java:132: cannot access java.lang.StringBuilder
class filefor java.lang.StringBuilder not found
return getClass().getName() +"@" + Integer.toHexString(hashCode());
^
1 error
make[1]: *** [compilefiles] Error 1
make[1]: Leaving directory `/home/paul/bin/j2me_cldc/api'
make: *** [all] Error 1
Now I don't know what to do next.
As per the subject title I'm trying to install this on a FC6 linux box with jdk-1.6.0.
Paul
[1440 byte] By [
moulsonpa] at [2007-11-26 18:47:40]
# 1
try to compile your MIDlet with java 1.4 compliance because j2me doesn't know StringBuilders!
# 2
Thanks for the tip supareno.
I added -target 1.4 -source 1.4
to the compile options and indeed it got a bit further; however I was next presented with a truck load of warnings before it finally abended:
../../../kvm/VmCommon/src/verifierUtil.c: In function 'matchStackMap':
../../../kvm/VmCommon/src/verifierUtil.c:426: warning: dereferencing type-punned pointer will break strict-aliasing rules
../../../kvm/VmCommon/src/verifierUtil.c: In function 'verifyClass':
../../../kvm/VmCommon/src/verifierUtil.c:547: error: invalid storage class for function 'Vfy_verifyMethod'
../../../kvm/VmCommon/src/verifierUtil.c:571: warning: implicit declaration of function 'Vfy_verifyMethod'
../../../kvm/VmCommon/src/verifierUtil.c:604: warning: dereferencing type-punned pointer will break strict-aliasing rules
../../../kvm/VmCommon/src/verifierUtil.c: At top level:
../../../kvm/VmCommon/src/verifierUtil.c:1595: error: static declaration of 'Vfy_verifyMethod' follows non-static declaration
../../../kvm/VmCommon/src/verifierUtil.c:571: error: previous implicit declaration of 'Vfy_verifyMethod' was here
../../../kvm/VmCommon/src/verifierUtil.c: In function 'Vfy_verifyMethod':
../../../kvm/VmCommon/src/verifierUtil.c:1598: error: invalid storage class for function 'Vfy_checkNewInstructions'
../../../kvm/VmCommon/src/verifierUtil.c:1609: warning: dereferencing type-punned pointer will break strict-aliasing rules
../../../kvm/VmCommon/src/verifierUtil.c:1610: warning: dereferencing type-punned pointer will break strict-aliasing rules
../../../kvm/VmCommon/src/verifierUtil.c:1616: warning: dereferencing type-punned pointer will break strict-aliasing rules
../../../kvm/VmCommon/src/verifierUtil.c:1633: warning: implicit declaration of function 'Vfy_checkNewInstructions'
../../../kvm/VmCommon/src/verifierUtil.c: At top level:
../../../kvm/VmCommon/src/verifierUtil.c:1671: error: conflicting types for 'Vfy_checkNewInstructions'
../../../kvm/VmCommon/src/verifierUtil.c:1633: error: previous implicit declaration of 'Vfy_checkNewInstructions' was here
make[1]: *** [obj/verifierUtil.o] Error 1
make[1]: Leaving directory `/home/paul/bin/j2me_cldc/kvm/VmUnix/build'
make: *** [all] Error 1
Any other suggestions?
# 3
sorry no more suggestions ...
# 4
Hi all!
so, after you change your
JAVAC= javac
to
JAVAC= javac -encoding cp1252 -target 1.4 -source 1.4
in your Makefile:
grep "javac" `find . -name Makefile`
you must open:
j2me_cldc/kvm/VmCommon/src/verifierUtil.c
and change some line, like add at the beginning these two lines:
...
unsigned short vSP;
static bool_t Vfy_checkNewInstructions(METHOD vMethod);
static int Vfy_verifyMethod(METHOD vMethod);
#if INCLUDEDEBUGCODE
...
and comment that line:
...
/*=========================================================================
* FUNCTION:Vfy_verifyMethod
* TYPE: private operation
* OVERVIEW:Verify a method
*
* INTERFACE:
*parameters: vMethod: the method
*returns:Nothing
*=======================================================================*/
static int Vfy_verifyMethod(METHOD vMethod) {
void Vfy_verifyMethodOrAbort(const METHOD vMethod);
//static bool_t Vfy_checkNewInstructions(METHOD vMethod);
int res;
...
and that one:
/*=========================================================================
* FUNCTION:verifyClass
* TYPE: public operation on classes.
* OVERVIEW:Perform byte-code verification of a given class. Iterate
*through all methods.
*
* INTERFACE:
*parameters: thisClass: class to be verified.
*returns:0 if verification succeeds, error code if verification
*fails.
*=======================================================================*/
int verifyClass(INSTANCE_CLASS thisClass) {
//static int Vfy_verifyMethod(METHOD vMethod);
int i;
int result = 0;
#if USESTATIC
Hope this helps,
Denis
# 5
Indeed it does help. Thanks a lot. It builds with a load of warnings, but at least it does build.Cheers, Paul
