On Wed, 24 Mar 2021 17:05:23 -0400
Scott Andrews <scott.andr...@columbus.rr.com> wrote:

> On Wed, 24 Mar 2021 18:11:46 +0100
> Pierre Labastie <pierre.labas...@neuf.fr> wrote:
> 
> > On Wed, 2021-03-24 at 17:07 +0100, Patrick Frisch wrote:  
> > > 
> > > Am 24.03.21 um 13:12 schrieb Scott Andrews:    
> > > > 
> > > > echo $LFS
> > > > 
> > > > Looks like it wasn't set
> > > > 
> > > > 
> > > >     
> > > 
> > > No, $LFS is set almost always to /mnt/lfs, as it was in this
> > > case, but the cause for the error was found already.
> > > 
> > > Do you have a reason why you have two real directories for /lib
> > > and /lib64, on most systems I know they already symlinked the
> > > two, so you don't have to make this strange empty link in the
> > > first place.    
> > 
> > I think having ld-linux-x86-64.so.2 in /lib64 is mandated by the
> > LSB (as well as having ld-lsb-x86-64.so.3, which I have never seen
> > used). But we want to have everything else in /lib, so we do the
> > necessary changes (case $(uname -m) ... in gcc, or
> > libc_cv_slibdir=/lib in glibc) in order to have everything
> > in /lib, and just keep the mandatory file as a symlink in /lib64.
> > Having /lib64 symlinked to /lib would mean that /lib64 and /lib
> > have the same content. Here /lib64 is almost empty, and this is
> > what we want... This is possible only if /lib64 is a real
> > directory. 
> 
> I don't recall /lib53 being called out on LSB, it is in FHS.

Should be /lib64

> 
> fhs-3.0.pdf
> 3.9. /lib : Essential shared libraries and kernel
> modules
> 3.9.1. Purpose
> The /lib directory contains those shared library images needed to
> boot the system and run the commands 11
> in the root filesystem, ie. by binaries in /bin and /sbin.3.9.2.
> Requirements At least one of each of the following filename patterns
> are required (they may be files, or symbolic links): File
>  Description
> libc.so.*
>  The dynamically-linked C library (optional)
> ld*
>  The execution time linker/loader (optional)
> 12
> If a C preprocessor is installed, /lib/cpp must be a reference to
> it, for historical reasons.3.9.3. Specific Options The following
> directories, or symbolic links to directories, must be in /lib, if
> the corresponding subsystem is installed: Directory
>  Description
> modules
>  Loadable kernel modules (optional)
> 3.10. /lib<qual> : Alternate format essential
> shared libraries (optional)
> 3.10.1. Purpose
> There may be one or more variants of the /lib directory on systems
> which support more than one binary 13
> format requiring separate libraries.9
> Found at
> http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
> and http://www.freedesktop.org/wiki/Software/xdg-user-dirs. 10 A
> description of GLib's conventions can be found in the documentation
> for GUserDirectory, at
> http://developer.gnome.org/glib/unstable/glib-
> Miscellaneous-Utility-Functions.html#GUserDirectory. 11 Shared
> libraries that are only necessary for binaries in /usr (such as any
> X Window binaries) must not be in /lib. Only the shared libraries
> required to run binaries in /bin and /sbin may be here. In
> particular, the library libm.so.* may also be placed in /usr/lib if
> it is not required by anything in /bin or /sbin. 12 The usual
> placement of this binary is /usr/bin/cpp. 13 This is commonly used
> for 64-bit or 32-bit support on systems which support multiple
> binary formats, but require libraries of the same name. In this
> case, /lib32 and /lib64 might be the library directories, and /lib
> a symlink to one of them. 11 The Root Filesystem 3.10.2.
> Requirements If one or more of these directories exist, the
> requirements for their contents are the same as the normal / 14 lib
> directory, except that /lib<qual>/cpp is not required.
> 
> 
> 
> > > 
> > > And I remember, that I had some issues in the past, because gcc
> > > searches some libs in /lib64 or vice versa. So I remember that I
> > > did a LFS build with the two libs symlinked (ln
> > > -sf /lib /lib64), so I didn't have to fiddle with single
> > > library linking, and it worked :-)   
> > 
> > That was how we were building a few years ago...
> > 
> > Pierre  
> 
> This is how most distributions are doing that today......
> 
> ls -l 
> lrwxrwxrwx   1 root root     7 Dec  2 07:36 bin -> usr/bin
> drwxr-xr-x   3 root root 16384 Dec 31  1969 boot
> drwxr-xr-x  19 root root  4080 Mar 24 13:59 dev
> drwxr-xr-x 124 root root 12288 Mar 23 07:22 etc
> drwxr-xr-x   7 root root  4096 Mar  6 13:47 home
> lrwxrwxrwx   1 root root     7 Dec  2 07:36 lib -> usr/lib
> drwx------   2 root root 16384 Dec  2 08:02 lost+found
> drwxr-xr-x   5 root root  4096 Mar  8 13:43 media
> drwxr-xr-x   2 root root  4096 Dec  2 07:36 mnt
> drwxr-xr-x   4 root root  4096 Dec  2 07:46 opt
> dr-xr-xr-x 218 root root     0 Dec 31  1969 proc
> drwx------  10 root root  4096 Mar 22 19:17 root
> drwxr-xr-x  29 root root   840 Mar 24 13:59 run
> lrwxrwxrwx   1 root root     8 Dec  2 07:36 sbin -> usr/sbin
> drwxr-xr-x   2 root root  4096 Dec  2 07:36 srv
> dr-xr-xr-x  12 root root     0 Dec 31  1969 sys
> drwxrwxrwt  17 root root  4096 Mar 24 16:57 tmp
> drwxr-xr-x  11 root root  4096 Mar  3 13:01 usr
> drwxr-xr-x  11 root root  4096 Mar  5 20:43 var

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