GCC 6.2 toolchain for AmigaOS 3

[wawa]

sorry, no matter..

[bebbo]

Originally Posted by sbergmann

You could limit the amount of history pulled using "git clone" using "--depth" and/or "--single-branch": https://git-scm.com/docs/git-clone#g...depthltdepthgt

To be more precise:

  git clone https://github.com/bebbo/amigaos-cross-toolchain.git
  cd amigaos-cross-toolchain/submodules
  git clone https://github.com/bebbo/gcc --depth 1 -b gcc-6-branch gcc-6
  cd ..
  ./toolchain-m68k build

This reduces the gcc-6 download size to ~124MB.

Bebbo

[NovaCoder]

Very cool to see you guys working on bringing a newer version of gcc to 68K....well done

I was always stuck with gcc 3.4 back in the day which made it hard to port newer games.

How long before people can download the (pre-built) files need to get gcc 6.2 building using something like AmiDevCpp?

Is gcc 6.2 now producing more efficient 68K assembler than gcc 3.4 overall (not just for isolated methods)?

[LuigiThirty]

I'm trying to build this on the Windows 10 Ubuntu shell. I get this when running toolchain-m68k --prefix=/opt/m68k-amigaos build:

checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... m68k-unknown-amigaos
checking for i686-linux-gnu-gcc... (cached) /usr/bin/gcc -m32 -std=gnu11
checking for C compiler default output... a.out
checking whether the C compiler works... configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.
make: *** [configure-opcodes] Error 1
ERROR: command "make -j1" failed with 2

[matthey]

Originally Posted by NovaCoder

Is gcc 6.2 now producing more efficient 68K assembler than gcc 3.4 overall (not just for isolated methods)?

It looks like the GCC 6.2 68k backend had improved noticeably before bebbo started to make changes. His changes need more testing and benchmarking but the results so far are very impressive. With them, GCC 6.2 very likely generates the best code quality for the 68k of any Amiga compiler ever .

Originally Posted by NovaCoder

How long before people can download the (pre-built) files need to get gcc 6.2 building using something like AmiDevCpp?

This also raises 2 other important questions.

1) What are the chances of bebbo's changes being accepted into the official GCC 68k backend?

2) Will NovaCoder return to the Amiga with a new improved GCC compiler for the 68k available?

[bebbo]

Originally Posted by bebbo

To be more precise:

  git clone https://github.com/bebbo/amigaos-cross-toolchain.git
  cd amigaos-cross-toolchain/submodules
  git clone https://github.com/bebbo/gcc --depth 1 -b gcc-6-branch gcc-6
  cd ..
  ./toolchain-m68k build

This reduces the gcc-6 download size to ~124MB.

Bebbo

git clone with --depth 1 is now used for all submodules to reduce download size.

Bebbo

[bebbo]

Originally Posted by LuigiThirty

I'm trying to build this on the Windows 10 Ubuntu shell. I get this when running toolchain-m68k --prefix=/opt/m68k-amigaos build:

checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... m68k-unknown-amigaos
checking for i686-linux-gnu-gcc... (cached) /usr/bin/gcc -m32 -std=gnu11
checking for C compiler default output... a.out
checking whether the C compiler works... configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.
make: *** [configure-opcodes] Error 1
ERROR: command "make -j1" failed with 2

Is the compiler able to create 32 bit programs?
Maybe you have the compiler but not the libs?

Try this:

apt-get install gcc-multilib g++-multilib

Bebbo

[paraj]

Originally Posted by bebbo

Is the compiler able to create 32 bit programs?
Maybe you have the compiler but not the libs?

Try this:

apt-get install gcc-multilib g++-multilib

Bebbo

When I tried a few weeks ago it wasn't possible to *run* 32-bit programs on x64 win10 bash.

@LuigiThirty: Try looking at the mentioned config.log, in my case it was pretty short.

[LuigiThirty]

Okay yeah, it only supports amd64 binaries. I'll try it in an actual Ubuntu VM instead.

[bebbo]

Originally Posted by LuigiThirty

Okay yeah, it only supports amd64 binaries. I'll try it in an actual Ubuntu VM instead.

I am using cygwin 32bit on Windows.

Bebbo

[LuigiThirty]

Okay cool, I got it compiling Amiga executables in Cygwin 32-bit, but the standard C library seems to be missing? I'm trying to compile this hello world application using stdio as well as the Amiga libraries.

#include <stdio.h>

#include <proto/dos.h>
#include <proto/exec.h>

struct DosLibrary *DOSBase = NULL;

int main(){
	if ((DOSBase = (struct DosLibrary *) OpenLibrary("dos.library", 34))) {
		char msg[] = "Hello world, this is GCC 6.3.1!";
		int length = strlen(msg);
		
		Write(Output(), msg, length);
		CloseLibrary((struct Library *)DOSBase);
	}
	
	return 0;
}

$ make
m68k-amigaos-gcc -g -noixemul -fbaserel -m68000 -msmall-code -Os -Wall -fomit-frame-pointer -o hello-ks13 hello-ks13.c
hello-ks13.c: In function ‘main’:
hello-ks13.c:9:39: warning: pointer targets in initialization differ in signedness [-Wpointer-sign]
  if ((DOSBase = (struct DosLibrary *) OpenLibrary("dos.library", 34))) {
                                       ^~~~~~~~~~~
hello-ks13.c:11:16: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
   int length = strlen(msg);
                ^~~~~~

[NovaCoder]

Originally Posted by matthey

It looks like the GCC 6.2 68k backend had improved noticeably before bebbo started to make changes. His changes need more testing and benchmarking but the results so far are very impressive. With them, GCC 6.2 very likely generates the best code quality for the 68k of any Amiga compiler ever .



This also raises 2 other important questions.

1) What are the chances of bebbo's changes being accepted into the official GCC 68k backend?

2) Will NovaCoder return to the Amiga with a new improved GCC compiler for the 68k available?

Let's see what happens with gcc 68K

[wawa]

i have some problems running amiga gcc6.2 generated code under aros68k which im trying to research, but while at that i have let the compilers output asm of a simple helloworld for comparison:

 #include <stdio.h>
 int main(void)
{
    printf("Hallo Welt!");
}

aros-gcc-4.6.4:

 #NO_APP
 .file "hw.c"
 .section .rodata
.LC0:
 .string "Hallo Welt!"
 .text
 .align 2
 .globl main
 .type main, @function
main:
 link.w %a5,#0
 pea .LC0
 jsr printf
 addq.l #4,%sp
 unlk %a5
 rts
 .size main, .-main
 .ident "GCC: (GNU) 4.6.4"

aros-gcc-6.3.0:

 #NO_APP
 .file "hw.c"
 .section .rodata
.LC0:
 .string "Hallo Welt!"
 .text
 .align 2
 .globl main
 .type main, @function
main:
 link.w %a5,#0
 pea .LC0
 jsr printf
 addq.l #4,%sp
 moveq #0,%d0
 unlk %a5
 rts
 .size main, .-main
 .ident "GCC: (GNU) 6.3.0"

amiga-gcc-6.2.0:

 #NO_APP
 .text
.LC0:
 .ascii "Hallo Welt!\0"
 .align 2
 .globl _main
_main:
 link.w fp,#0
 pea .LC0
 jsr _printf
 addq.l #4,sp
 moveq #0,d0
 unlk fp
 rts

no optimization turned on. im not really familiar with it bit looks like 4.6.4 still generates shorter code?

[LuigiThirty]

I tried building the examples in the example folder with the makefile there and I got the same error, printf not being defined. Hm. I'll try rebuilding, maybe there was a problem setting up configurations or something.

[wawa]

Originally Posted by LuigiThirty

I tried building the examples in the example folder with the makefile there and I got the same error, printf not being defined. Hm. I'll try rebuilding, maybe there was a problem setting up configurations or something.

undefined referrence? did you use -noixemul option when invoking the gcc?

[LuigiThirty]

Yeah, just using the makefile.

Luigi@Luigi-PC ~/amigaos-cross-toolchain/examples
$ make
m68k-amigaos-gcc -g -noixemul -m68020 -Os -Wall -fomit-frame-pointer -o hello-stdio hello-stdio.c
/tmp/ccDfnSy0.o(.text+0x16): In function `':
/home/Luigi/amigaos-cross-toolchain/examples/hello-stdio.c:5: undefined reference to `printf'
collect2: error: ld returned 1 exit status
make: *** [Makefile:24: hello-stdio] Error 1

edit: I don't have a m68k-amigaos-g++ either... maybe there was a build problem, I didn't get any errors at the end of it. I whipped up a quick GadTools program and it compiled and ran fine, so the C compiler itself is working.

[bebbo]

Originally Posted by LuigiThirty

Yeah, just using the makefile.

Luigi@Luigi-PC ~/amigaos-cross-toolchain/examples
$ make
m68k-amigaos-gcc -g -noixemul -m68020 -Os -Wall -fomit-frame-pointer -o hello-stdio hello-stdio.c
/tmp/ccDfnSy0.o(.text+0x16): In function `':
/home/Luigi/amigaos-cross-toolchain/examples/hello-stdio.c:5: undefined reference to `printf'
collect2: error: ld returned 1 exit status
make: *** [Makefile:24: hello-stdio] Error 1

edit: I don't have a m68k-amigaos-g++ either... maybe there was a build problem, I didn't get any errors at the end of it. I whipped up a quick GadTools program and it compiled and ran fine, so the C compiler itself is working.

Try again. C++ was disabled till today.

I also fixed the handling of inline functions in libnix which caused linking issues.

Bebbo

[wawa]

thx, have just build it again, this time in the user space to be able to simply add headers and libs. no problem found.

[Samurai_Crow]

Is the compiler using an up-to-date version of libStdC++?

[LuigiThirty]

Yep, I can use stdlib functions again. Thanks! Pulling the latest git and rebuilding GCC didn't give me a m68k-amigaos-g++ though.