[cfe-commits] r73289 - in /cfe/trunk: docs/LanguageExtensions.html include/clang/Basic/DiagnosticLexKinds.td include/clang/Lex/Preprocessor.h lib/Lex/PPMacroExpansion.cpp test/Preprocessor/feature_tests.c

[Eli Friedman]

On Sat, Jun 13, 2009 at 12:13 AM, Chris Lattner<sabre at nondot.org> wrote:
> Author: lattner
> Date: Sat Jun 13 02:13:28 2009
> New Revision: 73289
>
> URL: http://llvm.org/viewvc/llvm-project?rev=73289&view=rev
> Log:
> implement and document a new __has_feature and __has_builtin magic
> builtin preprocessor macro.  This appears to work with two caveats:
> 1) builtins are registered in -E mode,

Why is this an issue?  Or is that backwards?

> 2) target-specific builtins
> are unconditionally registered even if they aren't supported by the
> target (e.g. SSE4 builtin when only SSE1 is enabled).

Mmm, that's not good.  We don't actually keep track in the code at the
moment, though.

-Eli