diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h new file mode 100644 index 0000000000..046033fb9e --- /dev/null +++ b/include/llvm/Support/Compiler.h @@ -0,0 +1,40 @@ +//===-- llvm/Support/Compiler.h - Compiler abstraction support --*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file was developed by Chris Lattner and is distributed under +// the University of Illinois Open Source License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file defines several macros, based on the current compiler. This allows +// use of compiler-specific features in a way that remains portable. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_SUPPORT_COMPILER_H +#define LLVM_SUPPORT_COMPILER_H + +// The VISIBILITY_HIDDEN macro, used for marking classes with the GCC-specific +// visibility("hidden") attribute. +#if __GNUC__ >= 4 +#define VISIBILITY_HIDDEN __attribute__ ((visibility("hidden"))) +#else +#define VISIBILITY_HIDDEN +#endif + + +// C++ doesn't support 'extern template' of template specializations. GCC does, +// but requires __extension__ before it. In the header, use this: +// EXTERN_TEMPLATE_INSTANTIATION(class foo<bar>); +// in the .cpp file, use this: +// TEMPLATE_INSTANTIATION(class foo<bar>); +#ifdef __GNUC__ +#define EXTERN_TEMPLATE_INSTANTIATION(X) __extension__ extern template X +#define TEMPLATE_INSTANTIATION(X) template X +#else +#define EXTERN_TEMPLATE_INSTANTIATION(X) +#define TEMPLATE_INSTANTIATION(X) +#endif + +#endif |