RE: freebsd gcc cross compiler creates binaries that crash when using c++ exceptions

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> On 01/12/2012 06:55 PM, Markus Henschel wrote:
> > Is there some flaw in the way I built this toolchain? Where could I
> try to start looking for the source of the problem? I can add all sorts
> of other outputs from the created toolchains if it helps.
> 
> I wouldn't put the installed compiler (i.e. the prefix=) into the same
> directory as the sysroot.  The sysroot should be a clean & pristine
> copy of the root directories on your target.  It isn't written to, only
> read from.  Once you have done your make install you should have a set
> of target libraries that work in your prefix/lib.

I did this because I had problems building a relocatable toolchain. When "prefix" was different from "sysroot" the compiler used an absolute path to some files in sysroot. But I can change that to see if it helps.

> 
> You can't mix the c++ and libgcc libraries you just built with the
> versions on your target system.  It should be possible to install the
> newly-created ones side by side with the versions on your target
> system.

May be I should explain better:
Usually I link libgcc and libstdc++ statically to not interfere with whatever is installed on the target system. Because I got these crashes I started playing around. I linked my test app dynamically against libgcc.so and libstdc++.so. Then I copied my test app to the target system and used the installed versions of these libraries. This seems to work. I just did this by accident. This brought me to my conclusion that something must be wrong with these libs that I created while building the cross compiler. I should also mention that the versions of the compiler support libraries on the target system come from gcc 4.2.1 so they are "similar enough" to what my binaries needed.

So I started to build my toolchain on the target system as a native compiler with exactly the same configure switches. This also produced working versions of libgcc and libstdc++.




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