On 2/20/20 6:57 PM, Xi Ruoyao via lfs-dev wrote:
On 2020-02-21 01:54 +0100, Tadeus Prastowo via lfs-dev wrote:
Hello,
To quote
http://www.linuxfromscratch.org/lfs/view/development/chapter05/binutils-pass2.html
:
--with-sysroot
The sysroot feature enables the linker to find shared objects which
are required by other shared objects explicitly included on the
linker's command line. Without this, some packages may not build
successfully on some hosts.
End quote.
As described in another e-mail at
http://lists.linuxfromscratch.org/pipermail/lfs-dev/2020-February/073506.html,
the `--with-sysroot' option used to configure the second binutils will
refer to a non-existent directory, such as
/LFS-tools/x86_64-pc-linux-gnu/sys-root/. In other words, it cannot
be the case that the linker (ld) will "find shared objects which are
required by other shared objects explicitly included on the linker's
command line" in the non-existent directory. While it is true that
"without this, some packages may not build successfully on some hosts"
(e.g., the first build of Perl), the description of the
`--with-sysroot' can be improved as follows:
This option will prevent the linker from looking in the default places
in the build system (e.g., by reading the file /etc/ld.so.conf) by
forcing the linker to look only in places within the non-existent
default sysroot directory /tools/$LFS_TGT/sys-root. If this option is
not given and the linker reads some working ld.so.conf of the build
system, the linker will produce objects that are linked to the build
system's library, not to the libraries built within the /tools
directory, which defeats the effort of having a clean build.
What do you think? Thanks.
I agree. This also confused me when I was doing the Chinese translation.
I think we can improve the wording here, bu tnote that the linker
actually looks at ld.so.cache, not ld.so.conf. Only the ldconfig
command looks at ld.so.conf.
I'll use the above to try to reword the explanation of the
--with-sysroot option.
-- Bruce
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