Compilation error in creating shared library via JNI

Hi ALL,
I amin serious trouble with a problem. I am developing a Simulator, a function of which is to decode MPEG-2 Video files in real time and play it as well.I have got a MPEG-2 Decoder implemented in C from an open source and need to integrate with my Simulator which is writtebn in Java. The integration part I am doing via JNI(Java Native Interface). Now I have a bunch of C files in MPEG-2 decoder which are to be compiled during the Execution of the Java Simulator.Can anybody give some idea about how to call multiple C files from the Java Source through JNI at one go? Another problem I am facing is in calling a single C code from the traditional "HelloWorld" Java Code itself. The problem comes when I am trying to compile the shared library between the C native code and Java Code in my Linux Machine...I am getting the following message:
/usr/lib/gcc-lib/i386-redhat-linux/2.96/.../../../crt1.0 : In function '_start' :
/usr/lib/gcc-lib/i386-redhat-linux/2.96/.../../../crt1.0(.text+0x18): undefined reference to 'main'
collect2: ld retrurned 1 exit status
What does the above errot mean? How to rectify it.It will be of great help if you anybody can give me clues.

It means that your compiler options are wrong.
You need to create a shared library.
Instead you are creating an executable, which is not the same as a shared library.
If you search this forum you will find posts with command line options that work.

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our developers told me that for X-Code Version 4 you need an additional download. Then, it should also work with Version 4. Here is what they said:
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screen shot is also attached
regards
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Attachments:
error24.JPG ‏128 KB

Hi mazhar.ali,
Do you explicitly reference a DLL in your code?
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Compilation error while creating procedure

Hi,
I am getting compilation error while creating procedure
CREATE OR REPLACE My_CHANGEDATE IS
error_string VARCHAR2(400) := NULL;
BEGIN
Create table set_temp as select * from set;
CURSOR c1 is
     SELECT a.SETNUM, b.CHANGEDATE from
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     where a.setnum = b.setnum
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BEGIN
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END My_CHANGEDATE;

I have taken your code and cleaned it up to be more readable. Please see the comments in the code.
CREATE OR REPLACE My_CHANGEDATE
IS
        error_string VARCHAR2(400) := NULL;
BEGIN
        /* The only way to issue DDL in a procedure is to either user
         * DBMS_SQL or EXECUTE IMMEDIATE. Creating objects is generally
         * not needed or recommended in frequently run code.
        Create table set_temp as select * from set;
        /* The cursor declarations need to go in the declaration section of the
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        where a.setnum = b.setnum
        and trunc(a.changedate) < trunc(b.CHANGEDATE);
        BEGIN   /* Where is the END that goes with this begin? */
        /* Single record processing is generally not recommended. It is considered a "slow-by-slow" method. */
        FOR rec IN c1 LOOP
                UPDATE set SET changedate = rec.changedate
                WHERE setnum = rec.setnum;
                Insert into set_temp select * from set where setnum = rec.setnum;
        END LOOP;
EXCEPTION
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                NULL;
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                error_string := 'My_CHANGEDATE - '||SUBSTR(SQLERRM,1,350);
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1. Remove the CREATE TABLE from the procedure altogether.
2. Don't use reserved words for object names (e.g. SET)
3. Remove the record by record processing and consolidate it to a single UDPATE statement as follows (note untested):
UPDATE set s
SET     changedate = (
                        SELECT CHANGEDATE
                        FROM    SET A
                        ,       SETSO_T2 B
                        WHERE   A.SETNUM = B.SETNUM
                        AND     S.SETNUM = A.SETNUM
                        AND     TRUNC(A.CHANGEDATE) < TRUNC(B.CHANGEDATE)
WHERE EXISTS(
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                FROM    SET A
                WHERE   A.SETNUM = S.SETNUM
                )HTH!

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//mac.java
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Borland compiler
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VC++
Click File->New->Win32Dynamic-Link Library
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regards
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==================
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==================================
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Hi,
The maximum length supported by one CHAR type infoobject is 60. Check whether you have assigned more.
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I was afraid you'd say that, because I'm a long time Mac guy and I don't have the perfect answer. Have you ever messed with remote desktop? That'd seem to give her full access and control, something I personally wouldn't do, although it may work for you.
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hI,
Please go through this link , you will get the solution
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[Thr 1384] Sat May 09 18:21:13 2009
[Thr 1384] *** ERROR => ShmDelete: Invalid shared memory Key=34. [shmnt.c      719]
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Num
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Min.Size
Max.Size
Avail.Max
Curr.Size
1
c:\pagefile.sys
8192000 K
8192000 K
8192000 K
8192000 K
2
e:\pagefile.sys
10485760 K
10485760 K
10485760 K
10485760 K
3
f:\pagefile.sys
10485760 K
10485760 K
10485760 K
10485760 K
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Kindly help me with your suggestions.
Thank you
Regards,
Vineeth

Hi,
I would suggest you to go to run > services.msc
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login with <sid>adm & reregister the service by running sapstartsrv.exe in <drive>:\usr\sap\SID\sys\exe. after you give the parameters and press ok, wait for sometime for the 'success' message.
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another thread talks about similar kind of problem.
Shared Memory Ceation error when we install NW04S Java Stack.
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I got this compilation error during deploying.
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Compilation error in creating shared library via JNI

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