Difference between revisions of "User:Drobbins/CLFS"

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(Created page with "Getting CLFS building entirely in your existing user's home directory should be possible. I'm working on cleaning up some things in CLFS, and want to see if we can build ever...")
 
 
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Getting CLFS building entirely in your existing user's home directory should be possible.
== Isolated CLFS Script ==


I'm working on cleaning up some things in CLFS, and want to see if we can build everything inside someone's home directory -- creating the {f|/tools} and {f|/cross-tools} symlinks on the root filesystem is a bit messy. I also want to see if there is a simpler way to create a clean environment than creating a separate {{c|clfs}} user. In theory, this should not be necessary. We can create a clean-room shell environment like this:
Right now, CLFS as-is requires some changes to the host system -- the creation of {{f|/tools}} and {{f|/cross-tools}} symlinks on the root filesystem, as well as creation of a {{c|clfs}} user along with a custom {{c|.bash_profile}} and {{c|.bashrc}} for that user. Rather than do this, I'm working on getting each build working from a self-contained script as a regular user without these requirements.


{{code|lang=bash|body=
The script below accomplishes the following things when it builds {{c|file-5.19}}:
* It creates a shell that is unpolluted with existing environment settings, setting just what is needed for the build, just like the {{c|clfs}} user environment does in CLFS.
* Directory structure is located inside the user's home directory: {{f|/home/drobbins/sexybeast}}.
* Cross-tools are located at {{f|/home/drobbins/sexybeast/cross-tools}}, and the build uses this path directly rather than {{f|/cross-tools}}. This is done by tweaking {{c|$DESTDIR}} for {{c|make install}} rather than {{c|--prefix}} for {{c|./configure}}. Should be fine using this approach.
 
So I think script essentially wraps the CLFS cross-tools build process in a self-contained build environment without the typical CLFS host-related tweaks described above.
 
{{file|lang=bash|body=
#!/bin/bash
#!/bin/bash
exec /usr/bin/env -i /bin/bash --noprofile --norc << EOF
exec /usr/bin/env -i /bin/bash --noprofile --norc << "EOF"
export HOME=/home/drobbins
set +h
set +h
umask 022
umask 022
CLFS=$HOME/sexybeast
# ==========================================================
LC_ALL=POSIX
# Set up the environment variables:
PATH=$CLFS/cross-tools/bin:/bin:/usr/bin
# ==========================================================
export CLFS LC_ALL PATH
export HOME=/home/drobbins
export CLFS=$HOME/sexybeast
export CLFS_CROSS_TOOLS=${CLFS}/cross-tools
export D=${CLFS_CROSS_TOOLS}
export LC_ALL=POSIX
export PATH=$CLFS/cross-tools/bin:/bin:/usr/bin
unset CFLAGS CXXFLAGS
unset CFLAGS CXXFLAGS
echo Hello.
echo Hello.
export CLFS_HOST=$(echo ${MACHTYPE} {{!}} sed -e 's/-[^-]*/-cross/')
export CLFS_TARGET="powerpc64-unknown-linux-gnu"
export BUILD64="-m64"
# ==========================================================
# The actual build steps go here:
# ==========================================================
cd file-5.19 && ./configure --prefix=/ --disable-static && \
make -j && \
make DESTDIR=${D} install
EOF
EOF
}}
}}

Latest revision as of 04:17, February 9, 2022

Isolated CLFS Script

Right now, CLFS as-is requires some changes to the host system -- the creation of /tools and /cross-tools symlinks on the root filesystem, as well as creation of a clfs user along with a custom .bash_profile and .bashrc for that user. Rather than do this, I'm working on getting each build working from a self-contained script as a regular user without these requirements.

The script below accomplishes the following things when it builds file-5.19:

  • It creates a shell that is unpolluted with existing environment settings, setting just what is needed for the build, just like the clfs user environment does in CLFS.
  • Directory structure is located inside the user's home directory: /home/drobbins/sexybeast.
  • Cross-tools are located at /home/drobbins/sexybeast/cross-tools, and the build uses this path directly rather than /cross-tools. This is done by tweaking $DESTDIR for make install rather than --prefix for ./configure. Should be fine using this approach.

So I think script essentially wraps the CLFS cross-tools build process in a self-contained build environment without the typical CLFS host-related tweaks described above.

    (bash source code) 
#!/bin/bash
exec /usr/bin/env -i /bin/bash --noprofile --norc << "EOF"
set +h
umask 022
# ==========================================================
# Set up the environment variables:
# ==========================================================
export HOME=/home/drobbins
export CLFS=$HOME/sexybeast
export CLFS_CROSS_TOOLS=${CLFS}/cross-tools
export D=${CLFS_CROSS_TOOLS}
export LC_ALL=POSIX
export PATH=$CLFS/cross-tools/bin:/bin:/usr/bin
unset CFLAGS CXXFLAGS
echo Hello.
export CLFS_HOST=$(echo ${MACHTYPE} | sed -e 's/-[^-]*/-cross/')
export CLFS_TARGET="powerpc64-unknown-linux-gnu"
export BUILD64="-m64"
# ==========================================================
# The actual build steps go here:
# ==========================================================
cd file-5.19 && ./configure --prefix=/ --disable-static && \
make -j && \
make DESTDIR=${D} install
EOF
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