cross-compiling

cross-compiling

[Dragos Badea]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 147 bytes --]

 
When cross-compiling gcc , is it OK to provide an empty 
libgcc1.a that was created using the tools already existing on the host 
machine?

Re: cross-compiling

[Martin v. Loewis]

> When cross-compiling gcc , is it OK to provide an empty libgcc1.a that
> was created using the tools already existing on the host machine?

Since libgcc.a won't be used for *building* gcc (unless build!=host),
then yes, that is ok. I don't know what you mean by "empty", though -
if it does not have any functions, but the target relies on functions
in it, then the cross-compiler won't work (specifically, binaries
compiled with it won't link).

Regards,
Martin

Re: cross-compiling

[Martin v. Loewis]

> When cross-compiling gcc , is it OK to provide an empty libgcc1.a that
> was created using the tools already existing on the host machine?

Since libgcc.a won't be used for *building* gcc (unless build!=host),
then yes, that is ok. I don't know what you mean by "empty", though -
if it does not have any functions, but the target relies on functions
in it, then the cross-compiler won't work (specifically, binaries
compiled with it won't link).

Regards,
Martin

cross-compiling

[Dragos Badea]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 147 bytes --]

 
When cross-compiling gcc , is it OK to provide an empty 
libgcc1.a that was created using the tools already existing on the host 
machine?

Cross-compiling

[Tamas Nagy]

Hello,
 
I'd like to try the cross-compiling option in GCC, which sounds very
impressive. The host platform would be x86, and the target platforms are
IBM AIX, and Sun Solaris. The source code is a simple ANSI-C code,
without any platform specific thing.
 
Is there any documentation, how-to or even experience with such a
scenario? Is any Linux distribution contains packages or precompiled
binaries?
 
Thanks in advance,
Tamas 

Re: Cross-compiling

[Andrea 'Fyre Wyzard' Bocci]

At 17.18 24/11/01 (GMT +0100), Tamas Nagy wrote:

>I'd like to try the cross-compiling option in GCC, which sounds very
>impressive. The host platform would be x86, and the target platforms are
>IBM AIX, and Sun Solaris. The source code is a simple ANSI-C code,
>without any platform specific thing.
>
>Is there any documentation, how-to or even experience with such a
>scenario?

Two good places to look for imformation are:
GCC installation help: http://gcc.gnu.org/install/
CrossGCC FAQ: http://www.objsw.com/CrossGCC/

Actually, the FAQ is a bit old - the build process is still the same, 
though you should use the latest version available of the packages.
Here's what you'll need:
newlib-1.9.0
binutils-2.11.2
gcc-3.02
You can get these from http://www.gnu.org and http://sources.redhat.com.

I'd give a look to a recen post, also: 
http://gcc.gnu.org/ml/gcc-help/2001-11/msg00221.html.

Actually, compiling for those UNIX systems, I don't know wether or not you 
need newlib. I think you should be fine with the system's libc, but then I 
don't know about telling your cross-compiler about those systems library 
headers.
Somebody with more experience might give more help on this.

>Is any Linux distribution contains packages or precompiled
>binaries?

I don't know of any precompiled binaries for gcc cross-compiler.

HTH
fwyzard

Cross-Compiling

[Michael Becker]

Does anyone know how to build a Cross g++ for Solaris hosted on Linux ?
Need to know which headers and libs to be copied and how to configure.

Thanks: Michael

Re: Cross-Compiling

[Ian Lance Taylor]

Michael Becker <mb@apissoft.com> writes:

> Does anyone know how to build a Cross g++ for Solaris hosted on Linux ?
> Need to know which headers and libs to be copied and how to configure.

In the general case, you need to copy everything under /usr/include
and everything in /lib.  Then run configure using --with-headers and
--with-libs set to the directories where those files can be found.
    GCCSRCDIR/configure --target=sparc-sun-solaris2 --with-headers=DIR --with-libs=DIR

Ian