Re: Check for a library with C++ code

[Ossama Othman]

Hi Sebastian,

On Sat, Sep 28, 2002 at 06:20:36PM -0700, Sebastian Huber wrote:
> how can I write a check for a library which contain only functions and 
> classes 
> in a namespace?
> The easiest function is 'std::string TACO::errorString( long e)'.
> 
> I tried this:
> 
> AC_CHECK_LIB(TACOExtensions,errorString,found=yes,found=no,)
> 
> but it resulted in:
> 
> /home/huber/taco/frmII/tacodevel/build/client/io/configure:2971: undefined 
> reference to `errorString'

AC_CHECK_LIB uses a test program that assumes that the function you're
looking for has a C linkage.  Unless your C++ function has a C linkage
(e.g. via the extern "C" linkage directive), AC_CHECK_LIB will fail.
The test employed by AC_CHECK_LIB generally isn't suitable for methods
in C++ classes, C++ templates, etc due to the name mangling performed
by the compiler.

AFAICT, you'll have to write a custom test using something like
AC_TRY_LINK.  Make sure you set the test language to C++.

HTH,
-Ossama
-- 
Ossama Othman <address@hidden>
Distributed Object Computing Laboratory, Univ. of California at Irvine
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