# yum update
broke my patch to using the “right” libreadline
library for PARI/gp:
[david@localhost ~]$ gp
gp: symbol lookup error: /usr/local/lib/libreadline.so.6: undefined symbol: PC
$ ls -l /usr/local/lib/ | grep libreadline
[…]
lrwxrwxrwx. 1 root root 16 Feb 23 02:55 libreadline.so -> libreadline.so.6
lrwxrwxrwx. 1 root root 18 Feb 25 02:43 libreadline.so.6 -> libreadline.so.6.3
-r-xr-xr-x. 1 root root 680148 Feb 23 02:55 libreadline.so.6.3
[david@localhost ~]$ ldd -d -r /usr/local/lib/libreadline.so.6.3
linux-vdso.so.1 => (0x00007ffe25fc4000)
libc.so.6 => /lib64/libc.so.6 (0x00007f278d942000)
/lib64/ld-linux-x86-64.so.2 (0x0000003afc600000)
undefined symbol: PC (/usr/local/lib/libreadline.so.6.3)
undefined symbol: UP (/usr/local/lib/libreadline.so.6.3)
undefined symbol: BC (/usr/local/lib/libreadline.so.6.3)
undefined symbol: tgetflag (/usr/local/lib/libreadline.so.6.3)
undefined symbol: tgetent (/usr/local/lib/libreadline.so.6.3)
undefined symbol: tputs (/usr/local/lib/libreadline.so.6.3)
undefined symbol: tgoto (/usr/local/lib/libreadline.so.6.3)
undefined symbol: tgetnum (/usr/local/lib/libreadline.so.6.3)
undefined symbol: tgetstr (/usr/local/lib/libreadline.so.6.3)
[david@localhost ~]$ date
Sat Feb 25 04:18:04 EST 2017
Next, let’s check out with ldd my choice of libreadline,
$ ls -l /lib64/libreadline.so.6.0
-rwxr-xr-x. 1 root root 272008 Jun 22 2012 /lib64/libreadline.so.6.0
so, ldd -d -r /lib64/libreadline.so.6.0 :
$ ldd -d -r /lib64/libreadline.so.6.0
linux-vdso.so.1 => (0x00007ffc9bf2d000)
libtinfo.so.5 => /lib64/libtinfo.so.5 (0x0000003b0fa00000)
libc.so.6 => /lib64/libc.so.6 (0x0000003afce00000)
/lib64/ld-linux-x86-64.so.2 (0x0000003afc600000)
no complaints of undefined symbols.
