llvm dev - Aug 2012 - [LLVMdev] bugpoint (and possibly others) need to be compiled with -rdynamic

While running the llvm tests, I get several error messages like these:

[1/1] Running the LLVM regression tests
FAILED: cd /home/steve/llvm-build/test && /usr/local/bin/python
/home/steve/llvm/utils/lit/lit.py --param build_config=. --param
build_mode=Release -sv --param
llvm_site_config=/home/steve/llvm-build/test/lit.site.cfg --param
llvm_unit_site_config=/home/steve/llvm-build/test/Unit/lit.site.cfg
/home/steve/llvm-build/tes
t
-- Testing: 6378 tests, 4 threads --
Testing: 0 
FAIL: LLVM :: BugPoint/metadata.ll (351 of 6378)
******************** TEST 'LLVM :: BugPoint/metadata.ll' FAILED
********************
Script:
--
/home/steve/llvm-build/bin/./bugpoint -load
/home/steve/llvm-build/lib/./BugpointPasses.so
/usr/home/steve/llvm/test/BugPoint/metadata.ll -output-prefix /usr/ho
me/steve/llvm-build/test/BugPoint/Output/metadata.ll.tmp -bugpoint-crashcalls
-silence-passes > /dev/null
/home/steve/llvm-build/bin/./llvm-dis
/usr/home/steve/llvm-build/test/BugPoint/Output/metadata.ll.tmp-reduced-simplified.bc
-o - | /home/steve/llvm-build/bin/./
FileCheck /usr/home/steve/llvm/test/BugPoint/metadata.ll
--
Exit Code: 1
Command Output (stderr):
--
Error opening '/home/steve/llvm-build/lib/./BugpointPasses.so':
/home/steve/llvm-build/lib/./BugpointPasses.so: Undefined symbol
"_ZNK4llvm4Pass11getPassNameEv"
  -load request ignored.
bugpoint: Unknown command line argument '-bugpoint-crashcalls'.  Try:
'/home/steve/llvm-build/bin/./bugpoint -help'
bugpoint: Did you mean '-simplify-libcalls'?
--

bugpoint defines the symbol:
[sysnet80:~/llvm-build/bin] steve$ nm bugpoint |grep
_ZNK4llvm4Pass11getPassNameEv
00000000007c0420 T _ZNK4llvm4Pass11getPassNameEv

Here's a smaller example showing the particular issue
<http://pastebin.com/6fGHEy0q>. If you add -rdynamic when compiling a.c,
it works correctly:
Linux:
[hilbert:/tmp] steve$ clang -fPIC -rdynamic a.c -ldl
[hilbert:/tmp] steve$ ./a.out

FreeBSD:
[sysnet80:/tmp] steve$ clang -fPIC -rdynamic a.c
[sysnet80:/tmp] steve$ ./a.out

-- 
Stephen Checkoway

Attached is a patch that fixes it for the cmake build. I'm not positive this
is the right place to put it and I really have no idea where the check should go
when using the autotools.


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On Aug 21, 2012, at 1:01 PM, Stephen Checkoway wrote:
> While running the llvm tests, I get several error messages like these:
> 
> [1/1] Running the LLVM regression tests
> FAILED: cd /home/steve/llvm-build/test && /usr/local/bin/python
/home/steve/llvm/utils/lit/lit.py --param build_config=. --param
build_mode=Release -sv --param
> llvm_site_config=/home/steve/llvm-build/test/lit.site.cfg --param
llvm_unit_site_config=/home/steve/llvm-build/test/Unit/lit.site.cfg
/home/steve/llvm-build/tes
> t
> -- Testing: 6378 tests, 4 threads --
> Testing: 0 
> FAIL: LLVM :: BugPoint/metadata.ll (351 of 6378)
> ******************** TEST 'LLVM :: BugPoint/metadata.ll' FAILED
********************
> Script:
> --
> /home/steve/llvm-build/bin/./bugpoint -load
/home/steve/llvm-build/lib/./BugpointPasses.so
/usr/home/steve/llvm/test/BugPoint/metadata.ll -output-prefix /usr/ho
> me/steve/llvm-build/test/BugPoint/Output/metadata.ll.tmp
-bugpoint-crashcalls -silence-passes > /dev/null
> /home/steve/llvm-build/bin/./llvm-dis
/usr/home/steve/llvm-build/test/BugPoint/Output/metadata.ll.tmp-reduced-simplified.bc
-o - | /home/steve/llvm-build/bin/./
> FileCheck /usr/home/steve/llvm/test/BugPoint/metadata.ll
> --
> Exit Code: 1
> Command Output (stderr):
> --
> Error opening '/home/steve/llvm-build/lib/./BugpointPasses.so':
/home/steve/llvm-build/lib/./BugpointPasses.so: Undefined symbol
"_ZNK4llvm4Pass11getPassNameEv"
>  -load request ignored.
> bugpoint: Unknown command line argument '-bugpoint-crashcalls'. 
Try: '/home/steve/llvm-build/bin/./bugpoint -help'
> bugpoint: Did you mean '-simplify-libcalls'?
> --
> 
> bugpoint defines the symbol:
> [sysnet80:~/llvm-build/bin] steve$ nm bugpoint |grep
_ZNK4llvm4Pass11getPassNameEv
> 00000000007c0420 T _ZNK4llvm4Pass11getPassNameEv
> 
> Here's a smaller example showing the particular issue
<http://pastebin.com/6fGHEy0q>. If you add -rdynamic when compiling a.c,
it works correctly:
> Linux:
> [hilbert:/tmp] steve$ clang -fPIC -rdynamic a.c -ldl
> [hilbert:/tmp] steve$ ./a.out
> 
> FreeBSD:
> [sysnet80:/tmp] steve$ clang -fPIC -rdynamic a.c
> [sysnet80:/tmp] steve$ ./a.out
> 
> -- 
> Stephen Checkoway
> 
> 
> 
> 
> 
> 
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> 
-- 
Stephen Checkoway

On 21 August 2012 13:39, Stephen Checkoway <s at pahtak.org>
wrote:
> Attached is a patch that fixes it for the cmake build. I'm not positive
this is the right place to put it and I really have no idea where the check
should go when using the autotools.

What version of cmake are you using? I am getting the opposite
behavior: every binary is linked using -rdynamic :-(

Cheers,
Rafael