[SOLVED] confusion in LFS 7.5

Roy_SRC · 07-28-2014, 06:36 AM

hey there i managed to get to chapter 6.10. Adjusting the Toolchain of the LFS 7.5 book but i ran into a confusion... which is.. should i execute the following codes from root#/sources$ or just root#$

Code:

mv -v /tools/bin/{ld,ld-old}
mv -v /tools/$(gcc -dumpmachine)/bin/{ld,ld-old}
mv -v /tools/bin/{ld-new,ld}
ln -sv /tools/bin/ld /tools/$(gcc -dumpmachine)/bin/ld

Code:

gcc -dumpspecs | sed -e 's@/tools@@g'                   \
    -e '/\*startfile_prefix_spec:/{n;s@.*@/usr/lib/ @}' \
    -e '/\*cpp:/{n;s@$@ -isystem /usr/include@}' >      \
    `dirname $(gcc --print-libgcc-file-name)`/specs

and the sanity check..

Code:

echo 'main(){}' > dummy.c
cc dummy.c -v -Wl,--verbose &> dummy.log
readelf -l a.out | grep ': /lib'

and what about the rest of the codes in chapter 6.10.. thanks..

weibullguy · 07-28-2014, 08:05 AM

Not sure what you mean with the root#. It's been awhile since I did a LFS build, but IIRC, you're already in the chroot environment in chapter 6.10. Within the chroot environment, the filesystem root (/) is /mnt/lfs (or whatever you have $LFS set to) from your host system. So, /tools/bin in your chroot environment is the same as /mnt/lfs/tools/bin in your host system.

Since the commands in 6.10 use absolute paths, not relative paths, it doesn't matter where you execute the commands from. Unless the instructions direct me to change directories, I stay in /sources. So, I would execute those commands from /sources (/mnt/lfs/sources from the host system perspective). But, you can execute them from whichever directory in your chroot that tickles your fancy.

The remaining commands in 6.10 are grepping the log file you create in the last step you post above. So the remaining commands need to be executed from the directory in which you created dummy.log.

EDDY1 · 07-29-2014, 03:54 PM

Chapter 6.6 is where you entered chroot environment, also there are additional instructions of how to return to chroot environment if you should have to leave at the bottom of that page. Make sure that you follow the additional minstructions to get back to the chroot environment or you will endup changing your $PATH in your host sytem. Beleive my I've done it.

ravichanderjha · 01-14-2015, 09:57 AM

I have been following LFS nowadays and i have reached to chapter 6.10 Adjusting the Toolchain. I have followed the given commands but i am failed in sanity check of:-

grep -o '/usr/lib.*/crt[1in].*succeeded' dummy.log

I haven't get expected result i.e :-
/usr/lib/crt1.o succeeded
/usr/lib/crti.o succeeded
/usr/lib/crtn.o succeeded

So , i am facing trouble in next chapters .Please let me know the solution to get rid of this trouble.

ReaperX7 · 01-14-2015, 10:36 AM

Did you deviate from the book any?