Re: template.at on Darwin

[Peter O'Gorman]

On Feb 19, 2007, at 3:33 AM, Ralf Wildenhues wrote:

> Hello Peter, all,
>
> HEAD's test/template.at excludes some tests for Darwin, without any
> sort of explanation.  Do you have resources to look into this, so
> that we can either document why things do not work, or, even better,
> fix it?  Otherwise I can give it a try eventually.

Hi Ralf,

I filed this as rdar://problem/4135857 (in case any apple people are  
reading) in June 2005, it was closed as expected behavior, reopened  
after I complained and has recently been retitled as a documentation  
bug (they are going to document this behavior).

The problem arises because of Apple's flat namespace and two level  
namespace objects. Executables are being built with no namespace  
flag, so they are two level namespace by default. Two level namespace  
output causes the static linker to not look for definitions for  
symbols that are undefined in a flat namespace library:
"Please know that ld no longer looks for symbols in places that were  
not specified. This behavior lead to incorrect symbol resolution."

If I recall correctly, this test will pass if you export  
MACOSX_DEPLOYMENT_TARGET=10.3 before building libtool and running the  
testsuite, setting MACOSX_DEPLOYMENT_TARGET to 10.3 or later causes  
libtool to default to building two level namespace shared libraries.

Peter

> Thanks,
> Ralf
>
> ../../libtool-2.1a/tests/template.at:222: ./sub/main; lt_status=$?;  
> if test $lt_status -eq 0; then :;
>            elif test "X$host" != "X$build" && \
>                 { test -x "./sub/main" || test -x "./sub/ 
> main"$EXEEXT; }
>            then (exit 77); else (exit $lt_status); fi
> Not enabling shell tracing (command contains an embedded newline)
> --- /dev/null   2007-02-18 13:35:29.000000000 -0500
> +++ /tmp/build/tests/testsuite.dir/at-stderr   2007-02-18  
> 13:32:20.000000000 -0500
> @@ -0,0 +1,9 @@
> +dyld: lazy symbol binding failed: Symbol not found: __Z2a2c
> +  Referenced from: /tmp/build/tests/testsuite.dir/44/obj/ 
> lib2/.libs/libb.0.dylib
> +  Expected in: flat namespace
> +
> +dyld: Symbol not found: __Z2a2c
> +  Referenced from: /tmp/build/tests/testsuite.dir/44/obj/ 
> lib2/.libs/libb.0.dylib
> +  Expected in: flat namespace
> +
> +/tmp/libtool-2.1a/tests/testsuite: line 19168:  5946 Trace/BPT  
> trap         ./sub/main