Just for interest.
The GNU dynamic linker "ld" has a compiled-in search path that it uses
to find shared libraries at run-time. Here's how to view it:
$ ld -verbose | grep SEARCH_DIR | sed 's#; #;\n#g'
SEARCH_DIR("/usr/x86_64-linux-gnu/lib64");
SEARCH_DIR("=/usr/local/lib/x86_64-linux-gnu");
SEARCH_DIR("=/usr/local/lib64");
SEARCH_DIR("=/lib/x86_64-linux-gnu");
SEARCH_DIR("=/lib64");
SEARCH_DIR("=/usr/lib/x86_64-linux-gnu");
SEARCH_DIR("=/usr/lib64");
SEARCH_DIR("=/usr/local/lib");
SEARCH_DIR("=/lib");
SEARCH_DIR("=/usr/lib");
This is on Ubuntu Natty 11.04. The "multiarch" directories (eg.
/lib/x86_64-linux-gnu) were added to the binutils recently:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=369064
Natty now installs libc here:
$ ls -l /lib*/{*/,}{libc.so.6,libc-*.so}
-rwxr-xr-x 1 root root 1417796 2011-04-11 23:27 /lib32/libc-2.13.so
lrwxrwxrwx 1 root root 12 2011-05-04 13:16 /lib32/libc.so.6 ->
libc-2.13.so
-rwxr-xr-x 1 root root 1638120 2011-04-11 23:26
/lib64/x86_64-linux-gnu/libc-2.13.so
lrwxrwxrwx 1 root root 12 2011-05-04 10:50
/lib64/x86_64-linux-gnu/libc.so.6 -> libc-2.13.so
-rwxr-xr-x 1 root root 1638120 2011-04-11 23:26
/lib/x86_64-linux-gnu/libc-2.13.so
lrwxrwxrwx 1 root root 12 2011-05-04 10:50
/lib/x86_64-linux-gnu/libc.so.6 -> libc-2.13.so
No /lib/libc.so.6 at all. You can see that I have the ia32-libs installed.
Douglas.
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