On 2018-08-06 21:39 -0400, Michael Shell wrote: > On Tue, 07 Aug 2018 08:07:58 +0800 > Xi Ruoyao <xry...@mengyan1223.wang> wrote: > > > I just tried to build MPFR on a completed LFS. The tests linked to > > libquadmath, but libmpfr.so itself did not. > > > > Oh no, I think there is another problem. In 6.16 the final Binutils > > should have been built. So the final `ld` should have replaced the > > linker used in "Adjusting the Toolchain". > > > Xi, > > You are on a roll. OK, just to summarize for everyone here, so when binutils > is installed in 6.16, from that point forward, the ld the system is using > will link what is being built to libraries in /usr/lib rather than > /tools/lib.
It *should* be. Maybe John forgot 6.16, or paste commands from Chapter 5 wrongly. (I've done this once.) > And that means that when MPFR is built, its configure script should not > be able to even build anything linked against libquadmath because that > does not exist yet in /usr/lib. Correct? > > In the mpfr-4.0.1 source tree, I did a: > > grep -r MPFR_LIBQUADMATH * > > I don't see any effect from the detection of the availability of > libquadmath other than to add -lquadmath to the LD flags - nothing that > would suggest code pathways being altered or tests being selected or > otherwise changed. Me too. > They may have just put the detection in there for completeness, in case > they ever do want to use libquadmath's features, if, and only if, it is > available on the system. > > Well, maybe the issue John encountered *is* the whole point of it - > that the tests should error out if they can be built linked against > lquadmath, but not successfully executed - that they wanted to test > for that possibility of things going wrong. In MPFR ChangeLog: > r9231 | zimmerma | 2014-11-09 20:03:23 +0000 (Sun, 09 Nov 2014) | 2 lines > Changed paths: > M /trunk/acinclude.m4 > M /trunk/tests/Makefile.am > > added check for libquadmath (not used) It's indeed not used. I don't know the intention of Paul Zimmermann. -- Xi Ruoyao <xry...@mengyan1223.wang> School of Aerospace Science and Technology, Xidian University -- http://lists.linuxfromscratch.org/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page Do not top post on this list. A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? http://en.wikipedia.org/wiki/Posting_style
