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[C++11] Clarify in the Compiler.h support macros and comments (and 

assert it with an #error) that we require MSVC 2012; MSVC 2010 will no
longer suffice.

llvm-svn: 202631
This commit is contained in:
Chandler Carruth 2014-03-02 10:07:45 +00:00
parent bbc6d62736
commit d293fc2174
1 changed files with 6 additions and 1 deletions
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7
llvm/include/llvm/Support/Compiler.h
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@ -47,11 +47,16 @@
/// \macro LLVM_MSC_PREREQ
/// \brief Is the compiler MSVC of at least the specified version?
/// The common \param version values to check for are:
/// * 1600: Microsoft Visual Studio 2010 / 10.0
/// * 1700: Microsoft Visual Studio 2012 / 11.0
/// * 1800: Microsoft Visual Studio 2013 / 12.0
#ifdef _MSC_VER
#define LLVM_MSC_PREREQ(version) (_MSC_VER >= (version))
// We require at least MSVC 2012.
#if !LLVM_MSC_PREREQ(1700)
#error LLVM requires at least MSVC 2012.
#endif
#else
#define LLVM_MSC_PREREQ(version) 0
#endif