[SOLVED] Building and installing an alternative gcc in LFS 8.2

hazel · 03-14-2018, 12:08 PM

I want to build Pale Moon in LFS. I know I can't do it with gcc-7; it needs an earlier version. I think the recommended one is now gcc-5 but I've done it in Crux with gcc-6 and it worked. The point is that I don't want the older version to contaminate my primary tool chain.

I googled around and found a Red Hat article which suggested that only two additional configuration parameters are necessary: an installation prefix that puts all the files off the main path (they suggested /opt/gcc-$VERSION/) and a program suffix (-$VERSION) for the binaries, as one does with autoconf-2.13. Is that really all that is necessary? And can I take the rest of the configuration from the blfs instructions for rebuilding gcc?

anak_bawang · 03-14-2018, 09:09 PM

Similar to my old thread. Hope it's useful for you.
Libstdc++-7.2.0 error, LFS-8.1 systemd stable

knudfl · 03-15-2018, 05:54 AM

Re #1.

You can have as many gcc versions as you want, installed at the same time.
.. As long as program suffix and a hidden location is used.
( Extra compilers can be built in a single final step.)

Examples https://drive.google.com/drive/folde...nO?usp=sharing

gcc-5.xx https://docs.google.com/document/d/1...it?usp=sharing

gcc-6.xx https://drive.google.com/file/d/1eW5...ew?usp=sharing

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hazel · 03-15-2018, 06:27 AM

Yes, that's exactly the method I was querying. I have downloaded gcc-4.9 (the Pale Moon developers' preferred compiler) and I am going to build it like that and then build PM with it. If that works, I shall report back and mark this as solved.

hazel · 03-15-2018, 04:16 PM

I couldn't build gcc-4.9 with gcc-7. I suppose the gap is too great. It crashed while building libgcc.

Code:

In file included from ../../../libgcc/unwind-dw2.c:405:0:
./md-unwind-support.h: In function `x86_64_fallback_frame_state':
./md-unwind-support.h:65:47: error: dereferencing pointer to incomplete type
       sc = (struct sigcontext *) (void *) &uc_->uc_mcontext;
                                               ^
make[3]: *** [../../../libgcc/shared-object.mk:14: unwind-dw2.o] Error 1

However, I was able to build and install gcc-5.5. I will try to build palemoon with this, probably on Saturday as tomorrow will be a very busy day for me.

anak_bawang · 03-15-2018, 10:00 PM

Maybe you can try to build gcc-4.9 using gcc-5.5 which has been successfully installed before.
Well, just an idea.

hazel · 03-16-2018, 12:18 PM

I successfully built pm and I'm testing it out now. It crashes in Yahoo but I remember that I had the same problem before and it turned out to be a mesa3d thing. Rebuilding mesa cured it, so I will try that again.

I am writing this in pm but haven't installed it yet. I think I'll do that now.

hazel · 03-17-2018, 06:18 AM

I remember now! It wasn't mesa, it was the Intel video driver. Pale Moon has problems with it on certain sites. I have replaced it with the modesetting driver and pm works now.