implement workaround for header files

[Peter Johansson]

Hi autoconfers,

I have the following case:

I maintain a library that uses boost heavily. Recently I learnt that 
<boost/exception_ptr.hpp> is broken with certain version of GCC (4.4.7 
for example). I would like provide a workaround for users of the library 
(myself e.g.) so we won't even notice the breakage. I've implemented a 
compile test with AC_COMPILE_IFELSE that tests whether the compiler and 
'exception_ptr.hpp' get along or not, but now I'm not sure what is the 
best way to use this test. If I wrote an application I would AC_DEFINE 
and whether depending on that define or not I could include a patched 
header file first. But since I'm writing a library and the problem is 
exposed in header files that are installed I'm not sure what is the best 
way to accomplish that. I already have a 'public_config.h' with a subset 
of content in 'config.h', which is installed. Yet I'm not sure what is 
the best way to accomplish a good solution here. If I need to install a 
patched boost header file, it must be hidden away so people won't 
include it by mistake; otherwise I might get a mob after me rightfully. 
Anyone having experience with this kind of workaround? I looked at 
gnulib but it seems focused on workarounds for end applications and not 
installed headers, which is slightly different.

Thanks in advance.

Cheers,
Peter