Hello

Is there anybody who has compilled the libnodave testprogram "TestISO_TCP.PAS" under linux.
If yes could you tell what version of fpc and what options etc. you have used to it.
I have try with version 2.4.2 but got somthing like this:

hmi]$ fpc testISO_TCP.pas
Free Pascal Compiler version 2.4.2 [2010/11/09] for i386 Copyright (c) 1993-2010 by Florian Klaempfl
Target OS: Linux for i386
Compiling testISO_TCP.pas
testISO_TCP.pas(68,5) Note: Local variable "seconds" not used testISO_TCP.pas(68,13) Note: Local variable "thirds" not used testISO_TCP.pas(72,22) Note: Local variable "saveDebug" not used testISO_TCP.pas(72,33) Note: Local variable "proto" is assigned but never used
testISO_TCP.pas(79,5) Note: Local variable "t1" not used testISO_TCP.pas(79,8) Note: Local variable "t2" not used testISO_TCP.pas(84,5) Note: Local variable "usec" is assigned but never used Linking testISO_TCP
/usr/bin/ld: warning: link.res contains output sections; did you forget -T? /usr/lib/libnodave.so: undefined reference to `printf' /usr/lib/libnodave.so: undefined reference to `stdout' /usr/lib/libnodave.so: undefined reference to `connect' /usr/lib/libnodave.so: undefined reference to `strerror' /usr/lib/libnodave.so: undefined reference to `memcpy' /usr/lib/libnodave.so: undefined reference to `puts' /usr/lib/libnodave.so: undefined reference to `tcflush' /usr/lib/libnodave.so: undefined reference to `tolower' /usr/lib/libnodave.so: undefined reference to `malloc' /usr/lib/libnodave.so: undefined reference to `socket' /usr/lib/libnodave.so: undefined reference to `select' /usr/lib/libnodave.so: undefined reference to `fflush' /usr/lib/libnodave.so: undefined reference to `calloc' /usr/lib/libnodave.so: undefined reference to `write' /usr/lib/libnodave.so: undefined reference to `fprintf' /usr/lib/libnodave.so: undefined reference to `setsockopt' /usr/lib/libnodave.so: undefined reference to `read' /usr/lib/libnodave.so: undefined reference to `strncmp' /usr/lib/libnodave.so: undefined reference to `strncpy' /usr/lib/libnodave.so: undefined reference to `gettimeofday' /usr/lib/libnodave.so: undefined reference to `memset' /usr/lib/libnodave.so: undefined reference to `tcgetattr' /usr/lib/libnodave.so: undefined reference to `gethostbyname' /usr/lib/libnodave.so: undefined reference to `sprintf' /usr/lib/libnodave.so: undefined reference to `stderr' /usr/lib/libnodave.so: undefined reference to `fputc' /usr/lib/libnodave.so: undefined reference to `localtime_r' /usr/lib/libnodave.so: undefined reference to `fwrite' /usr/lib/libnodave.so: undefined reference to `htons' /usr/lib/libnodave.so: undefined reference to `__errno_location' /usr/lib/libnodave.so: undefined reference to `open' /usr/lib/libnodave.so: undefined reference to `tcsetattr' /usr/lib/libnodave.so: undefined reference to `close' /usr/lib/libnodave.so: undefined reference to `free' testISO_TCP.pas(413,1) Error: Error while linking
testISO_TCP.pas(413,1) Fatal: There were 1 errors compiling module, stopping Fatal: Compilation aborted
Error: /usr/bin/ppc386 returned an error exitcode (normal if you did not specify a source file to be compiled)

Try to do a fpc -k-lc testISO_TCP.pas

That should instruct the linker to link libc too

Jeppe Johansen wrote

Try to do a fpc -k-lc testISO_TCP.pas That should instruct the linker to link libc too

That's a very bad way to link libc, because afaik it bypasses all compiler detections for the fact that you are linking to that library (and doing so requires using different startup code). Instead, either add {$linklib c} to the source, or add the "initc" unit to the uses clause.

Jonas

Jeppe Johansen wrote

Try to do a fpc -k-lc testISO_TCP.pas That should instruct the linker to link libc too

Thanks
That was the way to do it.

Please could you explain it a little bit more.
I am new to this.
I have programmet in Dos and on windows for years. But with linux using shared lib i am total new.

Peter Andersen wrote

> That's a very bad way to link libc, because afaik it bypasses all compiler detections for the fact that you are linking to that library (and doing so requires using different startup code). Instead, either add {$linklib c} to the source, or add the "initc" unit to the uses clause. Please could you explain it a little bit more.

What is it exactly that you do not understand?

Jonas

Maybe, you can try the PascalSCADA...

Regards,

Fabio

2011/2/4 Jonas Maebe :

{$linklib c}
Is it possible just to add a line like:
{$/linklib c}
into the source and if yes where in the source.
I have some
{$ifdef linux}
,linux
{$endif}
should it be inside thes ifdef and endif ?

For the moment i just want a way to copy the data from som DB to a PC. I made 16 DB in the plc with meassument 400 logs in each. These data i want to take out to a PC.
So scada is a little to much for now.
By the way is there a english version of it.

Yes (without the "/")

and if yes where in the source.

In principle it can appear anywhere.

If the C library should only be linked when compiling for Linux: then yes (although I wouldn't add it inside that particular ifdef/endif block since it's the in the middle of a uses-clause, but instead in a separate ifdef/endif block that only contains shared library-related stuff). If the library should always be linked, then add it somewhere outside those defines.

Jonas