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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » Compiling a Channel Exit with GCC on AIX

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TonyD
PostPosted: Tue Jan 20, 2004 10:04 pm    Post subject: Compiling a Channel Exit with GCC on AIX Reply with quote

Knight

Joined: 15 May 2001
Posts: 540
Location: New Zealand

Could anyone give me the commands for doing this?..
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EddieA
PostPosted: Tue Jan 20, 2004 10:46 pm    Post subject: Reply with quote

Jedi

Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles

Have you looked in the Intercommunication Guide. There's a section called "Writing and compiling channel-exit programs".

But also, the manuals state that this is the only supported compiler for AIX: IBM VisualAge C++ Professional for AIX V5.0.

Cheers,
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Michael Dag
PostPosted: Wed Jan 21, 2004 5:12 am    Post subject: Reply with quote

Jedi Knight

Joined: 13 Jun 2002
Posts: 2607
Location: The Netherlands (Amsterdam)

Following worked for me... (not a programmer so was on trail and error)

/usr/vac/bin/cc -G -I/usr/include -I/usr/mqm/inc -o XXXexit XXXexit.c

Michael
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JasonE
PostPosted: Wed Jan 21, 2004 6:43 am    Post subject: Reply with quote

Grand Master

Joined: 03 Nov 2003
Posts: 1220
Location: Hursley

For a sample exit we have played with, here is something from the comments. Dont quote me and I havent tried these on any platform so try them at your own risk

Note: amqscsx.c was the channel exit name, and SecurityExit was the entrypoint exported.

Code:
/*  Windows NT (Visual C):                                            */
/*  **********************                                            */
/*   set MQBASEDIR=C:\Program Files\IBM\WebSphere MQ                  */
/*   cl amqscsx.c "%MQBASEDIR%\tools\lib\mqmvx.lib"                   */
/*             wsock32.lib /I "%MQBASEDIR%\tools\c\include" /MD /LD   */
/*                                                                    */
/*  LINUX (GCC):                                                      */
/*  ************                                                      */
/*   gcc -o amqscsx_r amqscsx.c -shared                               */
/*                                                                    */
/*  AIX:                                                              */
/*  ****                                                              */
/*   echo "#!\nSecurityExit\nMQStart" > amqscsx.exp                   */
/*   cc -o amqscsx amqscsx.c -H512 -T512 -bM:SRE                      */
/*                           -bE:amqscsx.exp -e MQStart               */
/*                                                                    */
/*  Solaris:                                                          */
/*  ********                                                          */
/*   cc -o amqscsx amqscsx.c -KPIC -G                                 */
/*                                                                    */
/*  HPUX:                                                             */
/*  *****                                                             */
/*   c89 -c +z +e amqscsx.c                                           */
/*   ld -o amqscsx amqscsx.o +b : +IMQStart +eMQStart                 */
/*                           +ISecurityExit +eSecurityExit -b         */


Note it also includes the following, I dont understand why!:
Code:
#if (MQAT_DEFAULT == MQAT_WINDOWS_NT)
__declspec( dllexport ) void MQENTRY Start(){;}
#else
MQENTRY Start(){;}
#endif

And the main entrypoint code:
Code:

/*********************************************************************/
/* Use declspec on Windows to export SecExitFunc as SecurityExit     */
/*********************************************************************/
#if (MQAT_DEFAULT == MQAT_WINDOWS_NT)
__declspec( dllexport ) void MQENTRY SecurityExit(
    PMQVOID  pChannelExitParms,
    PMQVOID  pChannelDefinition,
    PMQLONG  pDataLength,
    PMQLONG  pAgentBufferLength,
    PMQVOID  pAgentBuffer,
    PMQLONG  pExitBufferLength,
    PMQPTR   pExitBufferAddr)
{
#else
/*********************************************************************/
/* Functions exported by default or using compiler flags on UNIX     */
/* platforms, so wrapper defined to map SecurityExit to SecExitFunc  */
/*********************************************************************/
MQENTRY SecurityExit(
    PMQVOID  pChannelExitParms,
    PMQVOID  pChannelDefinition,
    PMQLONG  pDataLength,
    PMQLONG  pAgentBufferLength,
    PMQVOID  pAgentBuffer,
    PMQLONG  pExitBufferLength,
    PMQPTR   pExitBufferAddr)   
{
#endif
...code goes here...
}
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TonyD
PostPosted: Wed Jan 21, 2004 1:40 pm    Post subject: Reply with quote

Knight

Joined: 15 May 2001
Posts: 540
Location: New Zealand

Thanks guys....my question was specifically with regard to the snytax of commands, i.e. compile and link options, for using the GCC compiler rather than the IBM AIX one. Although not supported we have used it successfully for other programs. I had checked the section in the Intercomm manual but the supplied sample commands are not applicable to GCC.
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