Added minimum compiler version assertions
We now require (and enforce at compile time):
- GCC 4.8+
- clang 3.3+ (5.0+ for Apple's renumbered clang)
- MSVC 2015u3+
- ICC 15+
This also updates the versions listed in the README, and removes a
now-redundant MSVC version check.
diff --git a/README.md b/README.md
index f1a8407..4477882 100644
--- a/README.md
+++ b/README.md
@@ -96,9 +96,9 @@
## Supported compilers
-1. Clang/LLVM (any non-ancient version with C++11 support)
+1. Clang/LLVM 3.3 or newer (for Apple Xcode's clang, this is 5.0.0 or newer)
2. GCC 4.8 or newer
-3. Microsoft Visual Studio 2015 or newer
+3. Microsoft Visual Studio 2015 Update 3 or newer
4. Intel C++ compiler 16 or newer (15 with a [workaround](https://github.com/pybind/pybind11/issues/276))
5. Cygwin/GCC (tested on 2.5.1)
diff --git a/include/pybind11/common.h b/include/pybind11/common.h
index 73886e1..9da1ae9 100644
--- a/include/pybind11/common.h
+++ b/include/pybind11/common.h
@@ -28,6 +28,33 @@
# endif
#endif
+// Compiler version assertions
+#if defined(__INTEL_COMPILER)
+# if __INTEL_COMPILER < 1500
+# error pybind11 requires Intel C++ compiler v15 or newer
+# endif
+#elif defined(__clang__) && !defined(__apple_build_version__)
+# if __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 3)
+# error pybind11 requires clang 3.3 or newer
+# endif
+#elif defined(__clang__)
+// Apple changes clang version macros to its Xcode version; the first Xcode release based on
+// (upstream) clang 3.3 was Xcode 5:
+# if __clang_major__ < 5
+# error pybind11 requires Xcode/clang 5.0 or newer
+# endif
+#elif defined(__GNUG__)
+# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
+# error pybind11 requires gcc 4.8 or newer
+# endif
+#elif defined(_MSC_VER)
+// Pybind hits various compiler bugs in 2015u2 and earlier, and also makes use of some stl features
+// (e.g. std::negation) added in 2015u3:
+# if _MSC_FULL_VER < 190024213
+# error pybind11 requires MSVC 2015 update 3 or newer
+# endif
+#endif
+
#if !defined(PYBIND11_EXPORT)
# if defined(WIN32) || defined(_WIN32)
# define PYBIND11_EXPORT __declspec(dllexport)
@@ -651,8 +678,8 @@
/// Dummy destructor wrapper that can be used to expose classes with a private destructor
struct nodelete { template <typename T> void operator()(T*) { } };
-// overload_cast requires variable templates: C++14 or MSVC 2015 Update 2
-#if defined(PYBIND11_CPP14) || _MSC_FULL_VER >= 190023918
+// overload_cast requires variable templates: C++14 or MSVC
+#if defined(PYBIND11_CPP14) || defined(_MSC_VER)
#define PYBIND11_OVERLOAD_CAST 1
NAMESPACE_BEGIN(detail)