GCC 6.2 toolchain for AmigaOS 3

[pipper]

If you want to do C/C++ coding on Linux (or Windows), really give QtCreator a try. I love it. Always found Eclipse too convoluted.

https://www1.qt.io/offline-installers/?hsLang=en

(scroll to the bottom, download QtCreator standalone, not Qt the framework/toolkit).
It is free, even when using it to produce commercial software; much like the gcc licence.

[Marlon_]

I still do most of my C/C++ coding in the terminal to this date. I'm considering getting Visual Studio Code set up for this as it's available for Windows, Mac and Linux.

[Marlon_]

Originally Posted by NovaCoder

Nope, I'll try that now.



Thanks



Update: Seems happier now, still building...







OK that worked, now trying to use eclipse CDT, anyone have any tips?



Thanks

You are welcome to join us in our amigadev slack! https://join.slack.com/t/amigaports/...DA1OWQwNGY4MWQ

[NovaCoder]

Been playing around with this recently (using eclipse CDT) and come across my first problem.


I'm just trying to create a txt file and although it compiles and links OK it doesn't seem to work?

This is the code:

printf("creating log file\n");
    	debugLogFile = fopen("DEBUG.TXT", "w");
        if (debugLogFile) {
        	printf("created log file\n");
        } else {
        perror( "Error opening file" );
        printf( "Error code opening file: %d\n", errno );
        printf( "Error opening file: %s\n", strerror( errno ) );
  }

It always returns NULL and does not create 'DEBUG.TXT'

Output:

Error opening file
Error opening file: Success
Error code opening file: 0

Anyone know what I've stuffed up

I'm not linking with any extra libs or anything just using compiler options: -m68040 -noixemul -O3 -Wall -c -fmessage-length=0

[Marlon_]

Originally Posted by NovaCoder

Been playing around with this recently (using eclipse CDT) and come across my first problem.


I'm just trying to create a txt file and although it compiles and links OK it doesn't seem to work?

This is the code:

printf("creating log file\n");
    debugLogFile = fopen("DEBUG.TXT", "w");
        if (debugLogFile) {
        printf("created log file\n");
        } else {
        perror( "Error opening file" );
        printf( "Error code opening file: %d\n", errno );
        printf( "Error opening file: %s\n", strerror( errno ) );
  }

It always returns NULL and does not create 'DEBUG.TXT'

Output:

Error opening file
Error opening file: Success
Error code opening file: 0

Anyone know what I've stuffed up

I'm not linking with any extra libs or anything just using compiler options: -m68040 -noixemul -O3 -Wall -c -fmessage-length=0

I believe it’s the file access flag that is the culprit. Can’t remember which option was valid

[lantus360]

Originally Posted by lantus360

this code

#include <stdio.h>

int main()
{
	FILE *f = fopen("test.c","rt");
	
	if (f)
	{
		printf("File opened!\n");
		fclose(f);
	}
	else
	{
		printf("File not opened\n");
	}

opens my file OK with

m68k-amigaos-gcc -o test test.c 

but does not with

m68k-amigaos-gcc -o test test.c -noixemul

why?

edit: fails with -mcrt=nix13 but works with -mcrt=clib2

Novacoder - this might be related to your problem. Try linking with clib2

[Marlon_]

Ah, fopen might be broken in libnix.

[NovaCoder]

Thanks guys, will try linking with clib2


Update:

OK that threw up a linking error with strlcpy....do I need to change some other compiler settings?

Invoking: Cross GCC Linker
m68k-amigaos-gcc -s -mcrt=clib2 -o "HelloWorld_m68k"  ./src/HelloWorld_m68k.o  /home/novacoder/Development/tools/eclipse/df/SDL/Debug/libSDL.a 
/home/novacoder/Development/Amiga/tools/lib/gcc/m68k-amigaos/6.4.1b/../../../../m68k-amigaos/bin/ld: /home/novacoder/Development/Amiga/tools/m68k-amigaos/clib2/lib/libm.a(math_init_exit.o):math_init_exit.o:(.text+0x15a): undefined reference to `strlcpy'

Update:

I managed to get it working without clib2 by using native Amiga DOS commands

[bebbo]

FILE *f = fopen("test.c","rt");

There is no "rt" mode according to http://www.cplusplus.com/reference/cstdio/fopen/ or http://man7.org/linux/man-pages/man3/fopen.3.html ...

[NovaCoder]

Anyone know how to link in the library for the functions defined in unistd.h?

For example rmdir, stat, fstat

Are they missing from libnix?

This is building with noixemul and C++ BTW



Another unrelated problem I've noticed is that the following code doesn't work as expected:

PHP Code:

int main(int argc, char *argv[])
{
    struct DiskObject *diskObject;
    char *toolType;
    struct WBStartup* wbStartup;

    if (argc != 0) {
        // Started from the shell.
        return 1;
    }

    // Started from WorkBench
    wbStartup = (struct WBStartup*)argv;


} 


So when you start this from the shell it works as expected but it doesn't automatically populate the WBStartup structure when you start it from WorkBench (in fact it doesn't seem to even execute?)




Thanks

[bebbo]

Originally Posted by NovaCoder

Anyone know how to link in the library for the functions defined in unistd.h?

For example rmdir, stat, fstat

Are they missing from libnix?


This is building with noixemul and C++ BTW

I've no idea what version you are refering to. The libnix libraries do provide these functions.

Originally Posted by NovaCoder

Another unrelated problem I've noticed is that the following code doesn't work as expected:

PHP Code:

int main(int argc, char *argv[]){
    struct DiskObject *diskObject;
    char *toolType;
    struct WBStartup* wbStartup;
    if (argc != 0) {
        // Started from the shell.
        return 1;
    }
    // Started from WorkBench
    wbStartup = (struct WBStartup*)argv;
} 


So when you start this from the shell it works as expected but it doesn't automatically populate the WBStartup structure when you start it from WorkBench (in fact it doesn't seem to even execute?)


Thanks

Uhm, casting argv to wbStartup is not correct. Try this instead:

#include <unistd.h>
#include <sys/stat.h>

// defining a variable or function with this name prohibits linking of code
// parsing the command line into argv.
int __nocommandline;

// the startup message from workbench or 0 if started via cli
extern struct WBStartup *_WBenchMsg;

int main(int argc, char ** argv) {

// just a test of some functions.
  struct stat sbuf;
  mkdir("blubb", 0); // mode does not care on Amiga
  stat("blubb", &sbuf);
  rmdir("blubb");

  if (!_WBenchMsg) return 1;

  // started via workbench.

  return 0;
}

And compile it using

m68k-amigaos-gcc bla.c -Os -o bla -noixemul

[NovaCoder]

Originally Posted by bebbo

I've no idea what version you are refering to. The libnix libraries do provide these functions.



Uhm, casting argv to wbStartup is not correct. Try this instead:

#include <unistd.h>
#include <sys/stat.h>

// defining a variable or function with this name prohibits linking of code
// parsing the command line into argv.
int __nocommandline;

// the startup message from workbench or 0 if started via cli
extern struct WBStartup *_WBenchMsg;

int main(int argc, char ** argv) {

// just a test of some functions.
  struct stat sbuf;
  mkdir("blubb", 0); // mode does not care on Amiga
  stat("blubb", &sbuf);
  rmdir("blubb");

  if (!_WBenchMsg) return 1;

  // started via workbench.

  return 0;
}

And compile it using

m68k-amigaos-gcc bla.c -Os -o bla -noixemul

OK thanks, I'll give that a go

Update: Yep that works, thanks

[Toni Wilen]

I noticed that pfs3aio since v3.1 test #2 has extra data hunk, with size of 1 long, content 0x000011d0 and single reloc entry. None of object files should have non-constant data and nm only lists text ("T") symbols.

Updating to latest amiga-gcc didn't change anything (make clean/clean-prefix, git pull, make update, make all stuff done)

How to find out where it comes from? Some library?

(I was about to release final v3.1 pfs3aio but this needs to be fixed first, it should be 100% pure, single hunk and rommable)

[bebbo]

Originally Posted by Toni Wilen

I noticed that pfs3aio since v3.1 test #2 has extra data hunk, with size of 1 long, content 0x000011d0 and single reloc entry. None of object files should have non-constant data and nm only lists text ("T") symbols.

Updating to latest amiga-gcc didn't change anything (make clean/clean-prefix, git pull, make update, make all stuff done)

How to find out where it comes from? Some library?

(I was about to release final v3.1 pfs3aio but this needs to be fixed first, it should be 100% pure, single hunk and rommable)

Ok - took more time than expected^^

init.c:

  static const UBYTE *intext = "_interrupt";

that's a variable living in data.

you could move it into the text segment by making it const:

  static const UBYTE * const intext = "_interrupt";

How to find out where it comes from? Some library?

hunkdump each .o file then look into the source file where the data segement occurs and search for global / static variables

[Toni Wilen]

Originally Posted by bebbo

  static const UBYTE * const intext = "_interrupt";

Thanks. Time for final version

It must have been some compiler update that changed it because this part of code has not changed for ages.

[bebbo]

For those interested in my recent versions, I am providing now

• a setup for windows (64 bit)
• an archive for linux(64 bit) built on centos
• no osx - sorry - well, not really^^

Both do contain some stuff not yet on github...

Your branch is ahead of 'origin/master' by * commits.

• install anywhere - it's compiles with prefix /opt/amiga but you may chose a different path to copy/install to
• binutils 2.30.52
• m68k-amigaos-gprof
• some fixes
• use vc (vbcc front end) with provided vc.config
• ...

I also wrote a script to easily benchmark different compilers. Here is the chart for dhrystone21.c:



You may provide more benchmarks and compilers (prebuild for linux) and I'll update the chart and maybe also the compiler explorer

[alkis]

Ummm, gprof??? As in "profiler works"?

[bebbo]

Originally Posted by alkis

Ummm, gprof??? As in "profiler works"?

give it a try

 m68k-amigaos-gprof.exe test_gprof
Flat profile:

Each sample counts as 0.02 seconds.
  %   cumulative   self              self     total
 time   seconds   seconds    calls   s/call   s/call  name
 99.11      2.22     2.22        1     2.22     2.22  new_func1
  0.89      2.24     0.02        1     0.02     2.24  main
  0.00      2.24     0.00        2     0.00     1.11  func1

[alkis]

Originally Posted by bebbo

give it a try

will do, as soon as they hit github!

Issues to be reported at https://github.com/bebbo/gcc or you have a new location?

[pipper]

Does anyone know how to build a .library file with the gcc toolchain? I tried to follow the example at https://github.com/bebbo/amigaos-cro...mple-library.c but had no success. It built _something_ but I don’t think it’s a valid library file