llvm dev - Aug 2006 - [LLVMdev] Problem with stock llvmc configuration for C

Hi,

Apparently there are two bugs in tools/llvmc/c:

/.../llvm/tools/llvmc/c:12: Error: Invalid top level configuration item
/.../llvm/tools/llvmc/c:28: Error: Expecting a program name
/.../llvm/tools/llvmc/c had 2 errors. Terminating.

The first error relates to the following line(s):

   lang.libs=%llvmgccdir%/lib %llvmgccdir%/lib \
     %llvmgccdir%/lib/gcc/%llvmgccarch%

... the other one to:

   translator.command=%llvmcc1% -quiet %in% -o %out% \
   ...

Apparently, %llvmgccdir% and %llvmcc1% are not recognized as a useful  
variable by the llvmc configuration parser. I found out in tools/ 
llvmc/Configuration.cpp that two other library-related variables  
exist, notably %libdir% and %libs%, but it's not clear what they do.

Currently, I tried to solve the problems like this:

lang.libs=%libdir%
#this does not work: lang.libs=%libdir% %libs%

... and:

   translator.command=llvm-gcc -quiet %in% -o %out% \
   ...

Only the solution to the second problem really seems to work, the  
other one is accepted by llvmc, but I also get:

/usr/bin/ld: Undefined symbols:
_main
collect2: ld returned 1 exit status
llvmc: Action failed

How can this library problem be solved?

Kind regards,

Bram Adams
GH-SEL, INTEC, Ghent University (Belgium)

On Sun, 2006-08-13 at 21:18 +0200, Bram Adams wrote:
> Hi,
> 
> Apparently there are two bugs in tools/llvmc/c:
This tool is, as yet, unfinished.
> 
> /.../llvm/tools/llvmc/c:12: Error: Invalid top level configuration item
> /.../llvm/tools/llvmc/c:28: Error: Expecting a program name
> /.../llvm/tools/llvmc/c had 2 errors. Terminating.
> 
> The first error relates to the following line(s):
> 
>    lang.libs=%llvmgccdir%/lib %llvmgccdir%/lib \
>      %llvmgccdir%/lib/gcc/%llvmgccarch%
> 
> ... the other one to:
> 
>    translator.command=%llvmcc1% -quiet %in% -o %out% \
>    ...
> 
Okay.
> Apparently, %llvmgccdir% and %llvmcc1% are not recognized as a useful  
> variable by the llvmc configuration parser. 
Actually, they are. See tools/llvmc/ConfigurationDriver.cpp around line
304. Also, they are recognized by the lexer. Its more likely that when
you configured LLVM you didn't provide the --with-llvmgccdir= option.
> I found out in tools/ 
> llvmc/Configuration.cpp that two other library-related variables  
> exist, notably %libdir% and %libs%, but it's not clear what they do.
%libdir% expands to LLVM_LIBDIR which is the installation location of
LLVM libraries.
%libs% expands to the list of system (non-LLVM) libraries needed to link
with LLVM.
> 
> Currently, I tried to solve the problems like this:
> 
> lang.libs=%libdir%
> #this does not work: lang.libs=%libdir% %libs%
Did you install LLVM yet? If not, the directories are empty.
> 
> ... and:
> 
>    translator.command=llvm-gcc -quiet %in% -o %out% \
>    ...
> 
> Only the solution to the second problem really seems to work, the  
> other one is accepted by llvmc, but I also get:
> 
> /usr/bin/ld: Undefined symbols:
> _main
> collect2: ld returned 1 exit status
> llvmc: Action failed
> 
> How can this library problem be solved?
Probably with "make install" from LLVM build directory and by
configuring LLVM with --with-llvmgccdir=.

Please note that llvmc is (still!) a work in progress. The configuration
code, in particular, is due for some improvement. Please see PR686
(http://llvm.org/bugs/show_bug.cgi?id=686) for further details.
> 
> Kind regards,
> 
> Bram Adams
> GH-SEL, INTEC, Ghent University (Belgium)
Hope it helps,

Reid

Hi,

Op 14-aug-06, om 09:29 heeft Reid Spencer het volgende geschreven:
>
>> Apparently, %llvmgccdir% and %llvmcc1% are not recognized as a useful
>> variable by the llvmc configuration parser.
>
> Actually, they are. See tools/llvmc/ConfigurationDriver.cpp around  
> line
> 304. Also, they are recognized by the lexer. Its more likely that when
> you configured LLVM you didn't provide the --with-llvmgccdir= option.
They're indeed mentioned, but somehow they were not added to the  
switch-statements in the corresponding parsing functions for the  
various configuration options. I attached a patch in which this is  
resolved, as well as two other bugs:
  * an off-by-one error in a loop copying a command's arguments into  
an array (first argument was dismissed; garbage added at the end);
  * %...%'s in a command name were not substituted, whereas they were  
in the command's arguments.

The patch solved things for me, but it's not perfect yet.
>
>> I found out in tools/
>> llvmc/Configuration.cpp that two other library-related variables
>> exist, notably %libdir% and %libs%, but it's not clear what they
do.
>
> %libdir% expands to LLVM_LIBDIR which is the installation location of
> LLVM libraries.
> %libs% expands to the list of system (non-LLVM) libraries needed to  
> link
> with LLVM.
OK.

Kind regards,

Bram Adams
GH-SEL, INTEC, Ghent University (Belgium)

PS: I recently saw an email passing by in which someone else was  
talking about a patch for llvmc. Has that one been committed yet?
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