In application which i compiled for arm-linux platform, an error occurs when calling fpsocket.
Why fpsocket call can cause the error?

Thanks.

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Евгений wrote

In application which i compiled for arm-linux platform, an error occurs when calling fpsocket. Why fpsocket call can cause the error?

Type "man socket" on the command line and have a look at the "ERRORS" section. You can also do

   if fpsocket(..)=-1 then
     writeln(fpgeterrno);

to see what the specific error number is in your case (you can look up the meaning of those error numbers in /usr/include/asm-generic/errno- base.h and /usr/include/asm-generic/errno.h)

Jonas

Jonas Maebe пишет:

Socket error[38]: Function not implemented

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Евгений пишет:

Maybe problem is in the Linux kernel?

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2009/8/18 Евгений :

Socket error[38]: Function not implemented

Try and write a short c program to test socket support in the kernel. If it fails, maybe you need to re-configure (try `make menuconfig`) and re-build your kernel to make sure that socket support is included. If the c program works, fpc might

Henry Vermaak пишет:

Thank you for your advice, I tried. A simple socket program written in C works. Now I don't know what to do with Pascal, i don't want to rewrite my large program in C.

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2009/8/19 Евгений :

Thank you for your advice, I tried. A simple socket program written in C works. Now I don't know what to do with Pascal, i don't want to rewrite my large program in C.

Try using strace to get more information.

Henry

2009/8/19 Henry Vermaak :

If you are using an EABI kernel, it will be the socketcall syscall that's failing. This is the code in unistd.h:

/*
* The following syscalls are obsolete and no longer available for EABI. */
#if defined(__ARM_EABI__) && !defined(__KERNEL__)
#undef __NR_time
#undef __NR_umount
#undef __NR_stime
#undef __NR_alarm
#undef __NR_utime
#undef __NR_getrlimit
#undef __NR_select
#undef __NR_readdir
#undef __NR_mmap
#undef __NR_socketcall
#undef __NR_syscall
#undef __NR_ipc
#endif

The fpc socket implementation tries to use socketcall for arm eabi, so you can try the following patch and recompile fpc (not tested):

Index: rtl/linux/unixsock.inc
=================================================================== --- rtl/linux/unixsock.inc (revision 13557)
+++ rtl/linux/unixsock.inc (working copy)
@@ -13,7 +13,7 @@
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. }

-{$ifndef cpux86_64}
+{$if not defined(cpux86_64) and not defined(FPC_ABI_EABI)}
   {$define NEED_SOCKETCALL}
 {$endif}

Henry

Can you do a strace of the C and the FPC program and compare them? Maybe the C library uses some other calls than the FPC program ?

Michael.

2009/8/19 Henry Vermaak :

I've made a bugreport for this here:
http://bugs.freepascal.org/view.php?id=14386

It contains a patch that will help to remedy the above missing syscalls.

Henry

Henry Vermaak пишет:

A great, great, great ... Many thanks, Henry.
I apply your patch and now it works, socket succesfully created.

Best regards.

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