FreeTDS Development Group

["Lowden, James K" <LowdenJK AT bernstein.com>]

> From: Wolfgang Gruen
> Sent: Tuesday, January 31, 2006 4:30 PM
> 
> It looks like I am building with the gnu  compiler, but not linking
> with the gnu linker.  I assume I need to install gnu binutils?
> 
> I would appreciate if somebody could point me to the proper linker
> to use and where I can download it.  
...
> Linker is noto gnu linker:  configure:3411: checking for ld used
> by gcc configure:3478: result: /usr/ccs/bin/ld configure:3487:
> checking if the linker (/usr/ccs/bin/ld) is GNU ld configure:3502:
> result: no
>
> -bash-3.00$ ld -V 92453-07 linker command s800.sgs ld PA64 B.11.40
> REL 040528 ld: 92453-07 linker linker ld B.11.40 040530 ld: Usage:
> ld [options] [flags] files

Are you sure you want to use the GNU linker?  I wasn't suggesting you
should; I was only saying I don't know yours.  Your question was
(basically) "How do I change what my linker is doing?"  and the answer
(basically) is "RTFM".  ;-)  

>From what little I know of proprietary unices, I'd try using the
proprietary linker.  

Let's begin here:  

        http://docs.hp.com/en/B2355-60105/ld_pa.1.html

I think that matches what configure reported.  It says:

 +b path_list  Specify a colon-separated list of directories to
               be searched at program run-time to locate shared
               libraries needed by the executable output file
               that were specified with either the -l or -l:

 +s            Indicates that the shared library loader can use
               the environment variable SHLIB_PATH to locate
               shared libraries needed by the executable output
               file that were specified with either the -l or -l:
               (Series 700/800) option. The SHLIB_PATH
               environment variable should be set to a colon-
               separated list of directories. If both +s and +b
               are used, their relative order on the command line
               indicates which path list will be searched first
               (see the +b option).

and we also know that "-Wl" is IIRC the POSIX way for a compiler to pass
options to a linker, so we know that:

> > gcc -shared -fPIC -Wl,+h -Wl,libtdsodbc.sl.0 -Wl,+b
> > -Wl,/home/i3build/freetds/lib -o .libs/libtdsodbc.sl.0.0

passes '+b /home/i3build/freetds/lib' to /usr/ccs/bin/ld.  

What to do?  Choices:

1.  Find out where "/home/i3build/freetds/lib" came from, and change it.

2.  LDFLAGS=+s  ./configure 

(Cf.  ./configure --help | grep FLAGS)

Security-minded people recommend not letting the runtime linker search
for shared objects and would recommend #1.  Option #2 is quick and
addresses your original complaint:

> > When the loader tries to
> > resolved the libraries, it will ignore the environment variable
> > SHLIB_PATH, since the library is added  with a static path.

http://docs.hp.com/en/B2355-60105/chatr_pa.1.html

For a really quick-and-dirty test, try this:

        $ chatr +s enable libtdsodbc.sl.0.0

Then set SHLIB_PATH and take the rest of the day off.  

HTH.  

--jkl

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