CODEWITHSUNDEEP
linuxcross-compilinglinux-from-scratch
juicyliberty
juicyliberty

Reputation: 45

LFS why install glibc twice

I followed the LFS's insturctions and all of it seems to work properly yet. But i got confused when it comes to the second time of installation of the glibc after entering the chroot environment. My question is:

There is a glibc already compiled when building the cross-toolchain, and i assume all the codes inside that glibc should run on the lfs machine since the build process is configured with the parameter "--host=$LFS_TGT", if my assumption is right, then why do i need to build the glibc in the chroot environment again?

Here are the configure instructions used when building both glibc.

#compiling the cross-toolchain

../configure                             \
      --prefix=/usr                      \
      --host=$LFS_TGT                    \
      --build=$(../scripts/config.guess) \
      --enable-kernel=3.2                \
      --with-headers=$LFS/usr/include    \
      libc_cv_slibdir=/lib

#in the chroot environment

../configure --prefix=/usr                            \
             --disable-werror                         \
             --enable-kernel=3.2                      \
             --enable-stack-protector=strong          \
             --with-headers=/usr/include              \
             libc_cv_slibdir=/lib

Thank you!

Upvotes: 0

Views: 36

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