C++ & Caml: name clash

C++ & Caml: name clash

[Ohad Rodeh]

Hello,
  First of all, I'd like to thank all the replies for my
first question. 
 
  My second problem has to do with a name clash between 
the g++ standard library, and the alloc.h file from Caml. 
It turns out that the function "alloc" is defined by g++
in file /usr/include/g++-2/stl_alloc.h as:
	typedef class __default_alloc_template<true,0> alloc
In caml it is defined in include/alloc.h as:
	value alloc(mlsize_t, tag_t) 

  This does not allow compiling a file that #includes both 
Caml and g++ header files. 

  A simple solution is to recompile the Caml distribution
with a compiler flag that will modify alloc to, say, caml_alloc. 
However, I will need to distribute, along with my code, a
different version of Caml. Since this code is included in a much
larger software distribution (Ensemble), this is not an option.

  What do you suggest? 

  Thanks, 
	Ohad.

Re: C++ & Caml: name clash

[John Max Skaller]

Ohad Rodeh wrote:
> 
> Hello,
>   First of all, I'd like to thank all the replies for my
> first question.
> 
>   My second problem has to do with a name clash between
> the g++ standard library, and the alloc.h file from Caml.
> It turns out that the function "alloc" is defined by g++
> in file /usr/include/g++-2/stl_alloc.h as:
>         typedef class __default_alloc_template<true,0> alloc
> In caml it is defined in include/alloc.h as:
>         value alloc(mlsize_t, tag_t)
> 
>   This does not allow compiling a file that #includes both
> Caml and g++ header files.

All parts of the C++ library reside in namespace 'std'.
If there is a clash, it is a g++ bug.


-- 
John (Max) Skaller, mailto:skaller@maxtal.com.au
10/1 Toxteth Rd Glebe NSW 2037 Australia voice: 61-2-9660-0850
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Re: C++ & Caml: name clash

[Xavier Leroy]

>   My second problem has to do with a name clash between 
> the g++ standard library, and the alloc.h file from Caml. 
> It turns out that the function "alloc" is defined by g++
> in file /usr/include/g++-2/stl_alloc.h as:
> 	typedef class __default_alloc_template<true,0> alloc
> In caml it is defined in include/alloc.h as:
> 	value alloc(mlsize_t, tag_t) 
> 
>   This does not allow compiling a file that #includes both 
> Caml and g++ header files. 

The easiest solution, it seems, would be to split your source in two
files, one in plain C (or perhaps C++ but not using the STL)
containing just the Caml wrappers for your functions, and another one
defining your functions in C++ with STL without reference to the Caml
include files.

Hope this helps,

- Xavier Leroy