[flac-dev] Can't cross-compile from git now.

[JonY]

On 3/13/2013 06:50, Erik de Castro Lopo wrote:
> JonY wrote:
> 
>> Dave, my toolchain automatically links libssp already, I am using
>> vanilla sources.
> 
> Are you doing a native Windows compile with MinGW or cross compiling
> from Linux?
> 

Crossing from Cygwin, GCC built from vanilla FSF sources.

>> Why not also check if -lssp is required? If the toolchain has SSP
>> disabled it should not be passing. Check onces without -lssp and another
>> time with -lssp if it failed.
> 
> If we can easily force the linking of libssp then that maky work. I'm
> not real keen on having the Windows DLL require this extra libssp-X.dll.
> 

I guess that's libtool doing it. The link test that I used certainly did
not require the DLL.

>> Also, I don't think a trivial hello world will cause SSP code to be
>> emitted, try adding some arrays in stack with a deliberate overrun
>> possibility for the link test.
> 
> Unfortunately its even more complicated than that. It can sucessfully
> link and create a valid executable (with and without -lssp) which then
> fails at run time because it can't find libssp-0.dll. 
> 

Libtool forces all DLL code to link to other DLLs.

> This stuff is broken. I cannot see any reasonable way to make this
> work across the board. The best option I can suggest is a 
> 
>     ./configure --enable-stack-smash-protect
> 
> which is disabled by default.
> 

I am OK with this.



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