On 2020-05-11 09:19 -0500, Bruce Dubbs via lfs-dev wrote:
> On 5/11/20 8:23 AM, Pierre Labastie via lfs-dev wrote:
> > On Mon, 2020-05-11 at 19:51 +0800, Xi Ruoyao via lfs-dev wrote:
> > > I just redone LFS build for GCC-10.1.0. I proposed several
> > > improvements during
> > > the process:
> > >
> > > At first, some changes suggested by Firas:
> > >
> > > 1. Remove bzip2 in Chap. 5. No other changes needed.
> >
> > decreases the total number of SBUs by 0.1 :) why not, though
> >
> > > 2. Remove ncurses in Chap. 5. Move Chap. 6 readline after ncurses to
> > > satisify
> > > it.
> > > Notes:
> > > (1) Chap. 5 Python 3 can be built w/o ncurses, just lacking one
> > > module we don't
> > > need.
> > > (2) We moved readline before bc to satisify GNU bc, but now Gavin's
> > > bc doesn't
> > > need readline.
> >
> > good point
> >
> > > (3) It slightly reduces the functionality of Chap. 5 bash. Long
> > > command lines
> > > won't be wrapped automatically anymore.
> >
> > It does much more than that if the terminfo database is not installed:
> > no backspace (more exactly, backspace outputs only a space forward...)
> > left and right arrows not functional.
> > In short, no way to correct a typo
> >
> > can be Ok if scripting though
> >
> > > 3. Remove flex in Chap. 5. Move Chap. 6 flex before Binutils so
> > > `ranlib` and
> > > `ar` can link to libfl.so. It seems bison test suite does not
> > > depends on flex
> > > any more.
> >
> > bison chapter 6 will be built after flex anyway, if we do the above, so
> > whether it depends on it or not is not important.
> >
> > > However Firas' other suggestions are proved to be impossible. Glibc
> > > requires
> > > bison, gzip, gettext, perl, texinfo, python, and xz (to be untarred)
> > > so all of
> > > them need to stay in Chap. 5. Util-linux can't be removed from Chap.
> > > 5 due to
> > > its circular dependency with systemd/eudev.
> > >
> > > And:
> > >
> > > 4. Move Chap. 6 zstd before GCC, so GCC can link to libzstd.so and
> > > use zstd to
> > > compress LTO stream.
> >
> > definitely to be done, independently on the other points.
> >
> > > 5. Remove PKG_CONFIG_PATH=/tools/lib/pkgconfig in Chap. 6 kbd. It
> > > seems
> > > unneeded now.
> > >
> > > 6. Remove PERL5LIB=$PWD/tests/ in Chap. 6 make. It is unneeded now.
> > >
> > > 7. Add:
> > >
> > > mkdir /tools/lib/locale
> > > localedef -i POSIX -f UTF-8 C.UTF-8 2> /dev/null || true
> > >
> > > into Chap. 5 Glibc. It will satisfy Chap. 6 man-db test.
> >
> > Or link /tools/share/locale/locale-archive->/usr/share/locale/locale-
> > archive
> >
> > allows also all bison tests to pass
> >
> > > 8. Remove libctf{,-nobfd}.a (along with libbfd.a and libopcodes.a) in
> > > "Cleaning
> > > up" section.
> >
> > Independent on the other points and should be done for sure.
> >
> > > Are they OK to be committed into trunk?
> >
> > I'd say point 2 shouldn't not be committed, or only with some tweak of
> > the terminfo database...
> >
> > among the other points:
> >
> > - 4 and 8 should be done for sure.
> > - I've not tested 5 and 6, but I guess you have tested them, so go for
> > them too
> > - I'd rather use the link for point 7 (less instructions in chap 5
> > glibc). This is just one more line in "creating essentials symlinks and
> > files".
I agree that a link is better.
> > - I'm not sure about point 3: building flex only once is tempting, but
> > can the tests be run, and is flex the same as if rebuilt at the end of
> > chap 6?
I'll retry 3, 5 and 6 again to make sure, ...
> > - Point 1 improves only marginally the build time, but why not?
>
> Can we hold off on these changes for a week or so until we get BLFS
> built with gcc10?
... in the meantime we can get BLFS built with gcc 10 :).
--
Xi Ruoyao <xry...@mengyan1223.wang>
School of Aerospace Science and Technology, Xidian University
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