On 2012-08-25 16:10, Eleanore Boyd wrote: > On 8/25/2012 10:02 AM, Hadi wrote: > >> Hi Emerson, >> >> Thank your feedback, Emerson. >> >> I think I should correct you first. After binutils-2.22-Pass1 in >> Chapter 5 LFS 7.1, binutils are NOT picked up from the /tools >> directory: >> >> PATH= PATH=/tools/bin:/bin:/usr/bin >> >> In /tools/bin, there is only $LFS_TGT-* tools as following in my X86 >> virtual box: >> >> lfs:/mnt/lfs$ ls tools/bin/ >> >> i686-lfs-linux-gnu-addr2line i686-lfs-linux-gnu-elfedit >> i686-lfs-linux-gnu-ld i686-lfs-linux-gnu-ranlib >> >> i686-lfs-linux-gnu-ar i686-lfs-linux-gnu-gcc >> i686-lfs-linux-gnu-ld.bfd i686-lfs-linux-gnu-readelf >> >> i686-lfs-linux-gnu-as i686-lfs-linux-gnu-gcc-4.6.2 >> i686-lfs-linux-gnu-nm i686-lfs-linux-gnu-size >> >> i686-lfs-linux-gnu-c++filt i686-lfs-linux-gnu-gcov >> i686-lfs-linux-gnu-objcopy i686-lfs-linux-gnu-strings >> >> i686-lfs-linux-gnu-cpp i686-lfs-linux-gnu-gprof >> i686-lfs-linux-gnu-objdump i686-lfs-linux-gnu-strip >> >> Or we can use command "which is ld", it shows that ld is the host's: >> >> lfs:/mnt/lfs$ which is ld >> >> which: no is in (/tools/bin:/bin:/usr/bin) >> >> /usr/bin/ld >> >> Although in /tools/i686-lfs-linux-gnu/ there is binutils (ar/ld), >> but /tools/i686-lfs-linux-gnu is not in the PATH. >> >> So it is not easy to understand "Binutils is installed first because >> the configure runs of both GCC and Glibc perform various feature tests >> on the assembler and linker to determine which software features to >> enable or disable." and the tool chain constructing process. >> >> Hadi > If /tools is in the path, then all subdirectories are also in the > path. Binutils primarily contains the assembler and linker needed by > GCC to build assembler portions of any code. > > Elly
Not quite true elly, configure has some code to search in certain relative paths from the prefix, if you take a look at the build logs you'll find lots of references like: checking for ld... /mnt/lfs/tools/bin/../lib/gcc/i686-lfs-linux-gnu/4.7.1/../../../../i686-lfs-linux-gnu/bin/ld (That one is from gcc pass 2 in 7.2 dev chapter 5) If you want to test the theory, make a subdirectory under /usr/bin like so bash-4.2# mkdir /usr/bin/temp bash-4.2# echo "echo \"Well, that shouldn't have run.\"" > /usr/bin/temp/sillyprog bash-4.2# chmod 755 /usr/bin/temp/sillyprog bash-4.2# sillyprog bash: sillyprog: command not found you'll notice it's not found as it's not in the path: bash-4.2# export <snip> declare -x PATH="/usr/bin:/bin:/usr/sbin:/sbin" <snip> If subdirectories were automatically included in the path, that would make for a bit of a security problem. -- Jasmine Iwanek -- http://linuxfromscratch.org/mailman/listinfo/lfs-support FAQ: http://www.linuxfromscratch.org/lfs/faq.html Unsubscribe: See the above information page
