On Sat, Jan 1, 2011 at 1:35 PM, Bryce Lelbach <admin@thefireflyproject.us> wrote:
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There's a discrepancy in the definition of wint_t between GCC and some later versions of clang (clang defines it as an int, GCC an unsigned int). This ends breaking Boost.Iostreams with a GNU GCC compiled version of the GNU stdlib and clang (I'll restrain myself from giving the lengthy technical explaination - if you have link-time errors with clang + GCC compiled stdlib + Boost.Iostreams, this is probably the issue).
Unfortunately, I cannot patch this issue with a workaround in Boost easily. The right combination of clang flags can work around this by not using the clang intrinsic/builtin headers, but this has a good chance of causing other problems.
The simplest solution here is to rebuild clang (building the GNU stdlib with clang is tricky at best). I think newer version of the mainstream clang trunk may have fixed this, but if not, you need to change the assignment to WIntType in the clang::TargetInfo ctor ($CLANG_ROOT/lib/Basic/TargetInfo.cpp, line 40-50ish). It should be UnsignedInt.
You also need to hack $CLANG_ROOT/lib/Headers/stdint.h, around 630 - the macro definition of WINT_MIN and WINT_MAX need to be changed to:
#define WINT_MIN 0u #define WINT_MAX __UINTN_MAX(__WINT_WIDTH__)
If you'd rather not recompile clang, you can try hacking your clang intrinsic headers (not advisable, might break more stuff). Find the resource/intrinsic header directory (usually something like /usr/local/clang/2.9/include/), and make the change specified above to the stdint.h header there. In the stddef.h header, around like 60, you can change the wint_t typedef.
Is there a corresponding Clang bug? - Doug