llvm dev - Oct 2004 - [LLVMdev] Link error with TOOLLINKOPTS=-ldbghelp on MinGW

>From: John Criswell <criswell at cs.uiuc.edu>
>Will this library be needed for tblgen or for all LLVM programs?  And is it 
>a library you wrote for LLVM, or is it a MingW library?
It's is generally needed for all programs or at least programs using 
Signals.o (from platform/Signals.cpp) and it is platform/MinGW specific.
>TOOLLINKOPTS is used by configure to convey additional linker flags needed 
>to use system libraries.  These are typically system libraries for which a 
>-L option is not needed or has already been supplied to the configure 
>script.
Ok.
>For libraries internal to LLVM, we add the library to the USEDLIBS variable 
>in the program's Makefile.
>
>How we should handle the problem depends upon whether this will be needed 
>for all programs and whether libdbghelp  will be part of the LLVM source 
>tree.
Ok. However, the libdgbhelp isn't provided (so far, though you have access 
to the system interface through header files) on MinGW. But, you have the 
option to make your own libraries from system dll's on MinGW. For LLVM, 
libdbghelp is an external system specific library, so I don't think it 
should be a part of the LLVM source tree.

Henrik

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Henrik Bach wrote:
>> From: John Criswell <criswell at cs.uiuc.edu>
> 
> 
>> Will this library be needed for tblgen or for all LLVM programs?  And 
>> is it a library you wrote for LLVM, or is it a MingW library?
> 
> 
> It's is generally needed for all programs or at least programs using 
> Signals.o (from platform/Signals.cpp) and it is platform/MinGW specific.
Okay.
> 
>> TOOLLINKOPTS is used by configure to convey additional linker flags 
>> needed to use system libraries.  These are typically system libraries 
>> for which a -L option is not needed or has already been supplied to 
>> the configure script.
> 
> 
> Ok.
> 
>> For libraries internal to LLVM, we add the library to the USEDLIBS 
>> variable in the program's Makefile.
>>
>> How we should handle the problem depends upon whether this will be 
>> needed for all programs and whether libdbghelp  will be part of the 
>> LLVM source tree.
> 
> 
> Ok. However, the libdgbhelp isn't provided (so far, though you have 
> access to the system interface through header files) on MinGW. But, you 
> have the option to make your own libraries from system dll's on MinGW. 
> For LLVM, libdbghelp is an external system specific library, so I don't
> think it should be a part of the LLVM source tree.
So, if I'm understanding you correctly, libdgbhelp is a library that 
doesn't come with MinGW but can be installed on MinGW by the user if it 
is needed.  Am I correct?

If that's the case, I would say that it's the user's reponsibility
to
install the library into /usr/lib or provide the configure script with 
the appropriate -L options to find it (via the LDFLAGS environment 
variable).

-- John T.

> 
> Henrik
> 
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-- 
*********************************************************************
* John T. Criswell                         Email: criswell at uiuc.edu *
* Research Programmer                                               *
* University of Illinois at Urbana-Champaign                        *
*                                                                   *
* "It's today!" said Piglet. "My favorite day," said
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