Re: Use of libobjc from gcc 4.1 with MinGW

[Xavier Glattard]

Nicola Pero <nicola.pero <at> meta-innovation.com> writes:

> > Do i miss something ?
> 
> I think there might be a bit of confusion ... let me explain 
> 
> If you want to try native exceptions on MinGW, you should:
> 
>  1. install MSYS/MinGW
> 
>  2. build/install a GCC 4.x that provides you with native exceptions
> 
>  3. make sure this new GCC is the compiler that will be used by GNUstep
> (probably just make it the default compiler)
> 
>  4. follow the README.MinGW about installing GNUstep on MinGW/MSYS.  In
> particular, delete the libobjc
> that comes with whatever GCC you installed, and install gnustep-objc as
> explained in README.MinGW.
> 
> Then you should be able to test native exceptions ... it would be lovely for
> them to work, not sure though. 

If there is a bit of confusion it's not here ;-)

I've did that many times. gnustep-make configure script tells me :

checking for custom shared objc library... /c/GNUStep/System/Library/Libraries
checking whether objc has thread support... yes: 
checking whether we should use native ObjC exceptions... no
configure: Native objective-c exceptions were requested, but the compiler
configure: doesn't support them.
configure: error: compiler doesn't support native objective-c exceptions

... and configure fails.

If i don't ask for native exceptions i get :

checking for custom shared objc library... /c/GNUStep/System/Library/Libraries
checking whether objc has thread support... yes: 
checking whether we should use native ObjC exceptions... not requested by user
checking for the GCC version... version: 4.1
checking if the compiler supports autodependencies... yes: gcc version is 4.1
 >= 3.0
checking if the compiler supports precompiled headers... no: old or buggy gcc
checking if the compiler requires -shared flag to build for Solaris... yes: gcc
version is 4.1 >= 4.0

... and configure succeeds.

You can see that gnustep-libobjc and gcc-4.1.2 are found.
But you can also see that precompiled headers do not work...

With gcc-libobcj i get :

checking for custom shared objc library... NONE
checking whether objc has thread support... yes: 
checking whether we should use native ObjC exceptions... yes
checking for the GCC version... version: 4.1
checking if the compiler supports autodependencies... yes: gcc version is 4.1
 >= 3.0
checking if the compiler supports precompiled headers... no: old or buggy gcc
checking if the compiler requires -shared flag to build for Solaris... yes: gcc
version is 4.1 >= 4.0

... and configure succeed.
(but gnustep-base compilation fails)

I might have miss something, but what ??

Xavier