Gpc January 2004

gpc@gnu.de

17 participants
32 discussions

interface and implementation
by mkhaldi＠gosympatico.ca 02 Apr '04

02 Apr '04

I have a question about implementation and interface. If i want only to get the interface from a module which has an implementation module, how must I do to get also the symbol init_XXXXX?? example : ---------------------------------------------- module a interface; export a =all; type string80 = string(80); procedure p; end. module a implementation; procedure p; ...... ...... end. module b interface; export b =all; import a; end. module b impleementation; .... end. I just want to get the type definition without the implementation of module a. In the b.o file, init_A symbol appears. ------------------------------------------------- Actually, I compile my modules in 2 steps. The first one is with --interface-only to get gpi file. Then, I compile my module with --implementation-only. Sometimes, I only need the interface files. But, importing a module always adds the init_XXX symbol. So what is the solution?

3 2

GDB Debugging Nightmare!
by Bryan Meredith 06 Feb '04

06 Feb '04

Hello chaps, I have looked through the list but cant find anything definitive on this one... I am using -gstabs to compile as -g on its own gives "internal error - unimplemented function unk_lang_create_fundamental_type called." (as per an earlier post). I can get things to display by casting them to their type Type(Var) with initial letters capitalised. Where I get really stuck is trying to use this technique on a thingy (its a union in C - I dont know much pascal so I dont know what its called - sorry). This isnt real code - its so I can try to explain a little better... TYPE header = RECORD item1 : WORD; item2 : WORD; item3 : LONGWORD; END; type1 = PACKED RECORD hdr ; header; custom1 : BYTE; END; { you get the idea...} thingy = RECORD CASE INTEGER OF 1: (member1 : type1); 2: (member2 : type2); 3: (member3 : type3); END; VAR dummy1 : header; dummy2 : type1; dummy3 : thingy; >From within GDB when the program is running, I can inspect the contents of dummy1 by doing p Header(Dummy1) ( I would expect a simple p dummy1 to work but any debug is better than none). How do I get it to display member2 (assuming that member2 is the relevent member). I can tell which structure to use as there is a variable that has been set. Out of interest, is there a way of telling which member is the relevent one just by looking at dummy3? Sorry if this is really amateurish - I am a C programmer that has suddenly inherited a whole load of Pascal and I must admit that I am struggling with the debugger. It works fine for me in C - I am hoping that it is my ignorance that is the cause of the problem. If there are any publications, online or in print (I have the GPC documentation but it didnt help on this one) that you recommend, please post away. Thanks for any insight, Bryan "Brain Murders" Meredith

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Please help me
by B.Gayathri 31 Jan '04

31 Jan '04

Sir, I have an application running in HP pascal in MPE/iX platform. Now I port the same application in HP-UX and compiled. Many files got compiled, but one file is giving the following compilation error. FILE: /BRW/brwsrc/sub/rcchecki 281 420.000 1 $INCLUDE 'sub/rcchecki' $ ^ **** ERROR # 1 $INCLUDE NOT ALLOWED HERE WHEN SYMBOLIC DEBUG IS ENABLED (294) I dont know what the error is, but I found the cause given in HP pascal manual which is as follows: $INCLUDE of a file in executable code must be on a Pascal statement boundary if symbolic debug is enabled. I dont understand what it is, so I request you to give the solution to correct this error. Awaiting your reply. Thanks and regards, B.Gayathri

2 1

PExecute and arguments
by Peter Norton 29 Jan '04

29 Jan '04

Sorry, again me :-) As I understand from the docs there are no EXEC command in the GNU Pascal. Instead PExecute exists. >From the pexecutedemo.pas I understand how to call external program but I also need to pass parameters to. I have a mess in my head with all those TString,CString and PCStrings. Could someone drop a line-two of sample code how to call the program with passing parameters. Thanks in advance, Peter __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/

4 3

OsX Terminal Sounds
by Nathan Schneider 28 Jan '04

28 Jan '04

Hello! I'm trying to write a simple musical program for macosx terminal (haven't yet graduated to GUI) and not sure how to work the sounds out, especially since the included crt unit's "sound" doesn't seem to work. Basically, I'm trying to get some pitches specified as notes. Should I be approaching this by writing directly to the sound card somehow, or else maybe using sound files, or somewhere in between? any help or nudges in one direction or another would be greatly appreciated. thanks. nathan

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Re: PExecute and arguments
by Peter Norton 28 Jan '04

28 Jan '04

>Exec ('notepad.exe', 'c:\temp\foo.txt'); Thanks Professor. Actually I tried to replace Exec with PExecute. I'm adapting my old Pascal programs ( they're ok with FPC, VP ) to the GNU Pascal standards and found that Exec doesn't fires the program while your simple code works fine. Peter __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/

1 0

Re: Danger!
by J. David Bryan 27 Jan '04

27 Jan '04

I wrote: > I've searched the changelog for binutils 2.14 and did not find any > mention of such a patch. I spoke too soon. The FSF binutils does not mention a fix for this problem; however, the 20030807 Mingw binutils snapshot does appear to contain a patch. See: ftp://ftp2.sourceforge.net/pub/sourceforge/mingw/binutils-2.14.90-20030807-… which says, in part: The 2.14.90-20030807-1 snapshot incorporates modifications to official binutils CVS since last update. It also fixes a bug (again) with w9x fseek, where file contents are not zero'd out if you seek past the end and then write. This patch has not been in recent binutils releases. So perhaps the OP can use that binutils snapshot (available at the same FTP location, or via http://www.mingw.org/ ) to work around the problem on Win9x. -- Dave

5 7

Danger!
by Peter Norton 27 Jan '04

27 Jan '04

Just whant to confirm - binutils 2.14.90 (20030807) fixed the problem with MinGW. And "-mno-cygwin" is ok with Cygwin. Thanks to all for the help ;-) Peter __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/

1 0

Danger!
by Peter Norton 24 Jan '04

24 Jan '04

Info: To explore the content of exe file produced by gpc I compiled foo.pas - just "begin end.". It gave me 349.322 bytes exe file. Open it with hex editor I was wondered with content - there are a small manual how to use RTS (?), alot of zeros ... and a few web addresses I visited a few days ago! I have compiled one more time with -s switch. Again the visited addresses from the history of my Opera 6.05 I used hour before. Exploring it closer I found that some random memory dump is embeding in to exe. Who knows what will be there the next time - may be an accout's passwords or credit card detail you entered some days ago in browser. It placed after second 'msvcrt.dll' followed by two zeros and always is 328 bytes. I saved a few samples if someone will be interest. I use GPC under MinGW on Windows 98SE. Is it known issue? Question: Is there a program for Windows to analyze the content of PE executables and cleaning out the rubbish? Thanks, Peter __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/

4 5

Re: huge exe size
by Peter Norton 23 Jan '04

23 Jan '04

Thanks all who answered on my question. But now a new question appears - does speed affected by this rubbish in exe? Does all those died links works like a brake? All "big" is associates in my brain with "slow". Peter. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/

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Gpc January 2004