samba - Jan 2010 - readline/termcap problems compiling Samba 3.5.0rc1 on CentOS 5.4 64-bit

Hi all

When I try to compile  3.5.0rc1 on CentOS 5.4, I get the seemingly well know 
problem below

Linking bin/smbclient
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `tgetnum'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `tgetent'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `tgetstr'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `tgoto'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `UP'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `BC'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `tputs'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `PC'
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `tgetflag'
collect2: ld returned 1 exit status
make: *** [bin/smbclient] Error 1

I googled and read quite a bit, all links seem to suggest that either a missing
readline-devel and/or ncurses-devel might be the cuplrit. Now, I think I got
everything installed:

# rpm -qa --queryformat '%{name}\t%{version}\t%{arch}\n' | egrep
'(readline|curses|termcap)' | sort
libtermcap      2.0.8   i386
libtermcap      2.0.8   x86_64
libtermcap-devel        2.0.8   i386
libtermcap-devel        2.0.8   x86_64
ncurses 5.5     i386
ncurses 5.5     x86_64
ncurses-devel   5.5     i386
ncurses-devel   5.5     x86_64
readline        5.1     i386
readline        5.1     x86_64
readline-devel  5.1     i386
readline-devel  5.1     x86_64
termcap 5.5     noarch

A little testprogram fails with the same error, if I do

# gcc -o tt tt.c  -lreadline
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
undefined reference to `PC'
...

But succeeds if I either add -lcurses/-ltermcap or the linker flags that Samba
uses

gcc -o tt tt.c  -Wl,-z,relro -Wl,--as-needed  -Wl,--export-dynamic -lreadline

I checked the Makefile and config.log, it correctly determined the linker
flags to be

TERMLIBS=-lreadline -ltermcap

but still, I can't get rid of the above error. I'm a bit lost, any
hints?

-- 
	CU, Joe

Hi

On Friday 22 January 2010 01:21:46 Joe Ammann wrote:
> When I try to compile  3.5.0rc1 on CentOS 5.4, I get the seemingly well
> know problem below
>
> Linking bin/smbclient
> /usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/libreadline.so:
> undefined reference to `tgetnum'
I was finally able to solve my problem. The reason was the combination of 2 
facts:

- CentOS readline library does not declate dependency on curses/termcap
- Samba compile uses the -Wl,--ad-needed link flag

Then, although libtermcap is mentioned as library to link (-ltermcap), gcc 
does not include it - because no directly used library declares any 
dependency on it.

I fixed my problem by using LDFLAGS="-Wl,--no-as-needed"
./configure...... to
compile.

-- 
	CU, Joe

On 2010-01-22 at 01:21 +0100 Joe Ammann sent off:
> but still, I can't get rid of the above error. I'm a bit lost, any
hints?
this is a known issue of the RHEL5/CentOS packages, see

https://bugzilla.samba.org/show_bug.cgi?id=6984
https://bugzilla.redhat.com/show_bug.cgi?id=499837

Cheers
Bj?rn