[Tcl-bugs] [ tcl-Bugs-218110 ] 'gcc -Wl,-rpath' breaks 'make test'

[<no...@so...>]

Bugs item #218110, was opened at 2000-10-25 17:53
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=110894&aid=218110&group_id=10894

Category: 49. Configure and Build Tools
>Group: 8.3.4
>Status: Open
>Resolution: Remind
Priority: 2
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Mo DeJong (mdejong)
>Summary: 'gcc -Wl,-rpath' breaks 'make test'

Initial Comment:
OriginalBugID: 1896 Bug
Version: 8.1b3
SubmitDate: '1999-04-19'
LastModified: '1999-08-13'
Severity: SER
Status: Closed
Submitter: pat
ChangedBy: hobbs
RelatedBugIDs: 957 1951 2195 1409
OS: Other
OSVersion: RedHat Linux on Alpha XL 300
Machine: NA
FixedDate: '2000-10-25'
FixedInVersion: NA
ClosedDate: '1999-08-13'


Name:
Don Porter

ObservedBehavior:
I already have Tcl 8.1b2 installed under /usr/local .

    Download and build Tcl 8.1b3:
    $ cd tcl8.1b3/unix
    $ ./configure --enable-gcc --enable-shared
    $ make runtest
    ...
    gcc -pipe -rdynamic tclTestInit.o tclTest.o tclTestObj.o
    tclTestProcBodyObj.o tclThreadTest.o   tclUnixTest.o
    -L/homeitl/dgp/tcl8.1b3/unix -ltcl8.1 -ldl  -lm -lc  -Wl,-rpath,/usr/local/lib -o tcltest
    LD_LIBRARY_PATH=`pwd`:; export LD_LIBRARY_PATH;  SHLIB_PATH=`pwd`:; export SHLIB_PATH;  TCL_LIBRARY="/homeitl/dgp/tcl8.1b3/library"; export TCL_LIBRARY;  ./tcltest
    % info patch
    8.1b2

DesiredBehavior:
I want 'make runtest' and 'make test' to test the Tcl 8.1b3 library
    that I just built, *not* the Tcl 8.1b2 library installed as
    /usr/local/lib/libtcl8.1.so, which the new library will overwrite
    when it is installed.

    Because tcl8.1b3/unix/tcltest is linked with -Wl,-rpath,/usr/local/lib,
    the path /usr/local/lib is embedded in tcltest as the first place to
    look for the libtcl8.1.so shared library it needs.  The -rpath
    apparently overrides the setting of LD_LIBRARY_PATH made when calling
    tcltest which attempts to direct tcltest to use the libtcl8.1.so in
    the current directory.  So, tcltest loads /usr/local/lib/libtcl8.1.so,
    which is the 8.1b2 library.

    The upshot is that 'make test' actually tests the old, installed library
    and probably crashes, either because a new test reveals a crash in the
    old library, or because there are symbols missing in the old library
    which the new tcltest expects to find.

    The quick workaround is to advise all installers that they must run
    'make install' before running 'make test', though that seems 
    backwards.  One would rather test before installing.  In the longer
    term, this issue needs more careful thinking through.  Testing
    in the build directory always been awkward (look at all those 
    environment variable settings just trying to make it work!), and
    it's not getting better.

    Perhaps tclsh and tcltest could be linked differently?  Use -rpath
    for tclsh, but not for tcltest?



-Wl,-rpath are necessary for normal operations.  This confusion
may occur when users are dealing with minor version releases.
See the related bug reports for the counter to this argument. 
-- 08/13/1999 hobbs

----------------------------------------------------------------------

>Comment By: Don Porter (dgp)
Date: 2001-11-26 22:03

Message:
Logged In: YES 
user_id=80530

I'm re-opening this report because this issue is still
present in Tcl 8.3.4 and is still leading to false bug
reports.  The latest:

http://sf.net/tracker/index.php?func=detail&aid=485334&group_id=10894&atid=110894

Some possible solutions:

  1) Actually use different real names for the shared
     library of each patch release of Tcl, and link the
     tcltest executable against the real name, and tclsh
     against the soname; OR

  2) Always build the tcltest executable with the
     --disable-shared configuration; OR

  3) Whatever brilliant ideas Mo has to offer.

----------------------------------------------------------------------

You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=110894&aid=218110&group_id=10894