[llvm] r273493 - Do not require __STDC_LIMIT_MACROS and others

[Pawel Bylica via llvm-commits]

Author: chfast
Date: Wed Jun 22 16:15:51 2016
New Revision: 273493

URL: http://llvm.org/viewvc/llvm-project?rev=273493&view=rev
Log:
Do not require __STDC_LIMIT_MACROS and others

Summary: Do not require __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS macros to be defined globally. They are not needed for C++11 compliant standard headers.

Reviewers: joerg, jyknight

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D21553

Modified:
    llvm/trunk/include/llvm/Support/DataTypes.h.cmake

Modified: llvm/trunk/include/llvm/Support/DataTypes.h.cmake
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/DataTypes.h.cmake?rev=273493&r1=273492&r2=273493&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/DataTypes.h.cmake (original)
+++ llvm/trunk/include/llvm/Support/DataTypes.h.cmake Wed Jun 22 16:15:51 2016
@@ -55,17 +55,14 @@
 
 #ifndef _MSC_VER
 
-/* Note that this header's correct operation depends on __STDC_LIMIT_MACROS
-   being defined.  We would define it here, but in order to prevent Bad Things
-   happening when system headers or C++ STL headers include stdint.h before we
-   define it here, we define it on the g++ command line (in Makefile.rules). */
-#if !defined(__STDC_LIMIT_MACROS)
-# error "Must #define __STDC_LIMIT_MACROS before #including Support/DataTypes.h"
+#if !defined(UINT32_MAX)
+# error "The standard header <cstdint> is not C++11 compliant. Must #define "\
+        "__STDC_LIMIT_MACROS before #including Support/DataTypes.h"
 #endif
 
-#if !defined(__STDC_CONSTANT_MACROS)
-# error "Must #define __STDC_CONSTANT_MACROS before " \
-        "#including Support/DataTypes.h"
+#if !defined(UINT32_C)
+# error "The standard header <cstdint> is not C++11 compliant. Must #define "\
+        "__STDC_CONSTANT_MACROS before #including Support/DataTypes.h"
 #endif
 
 /* Note that <inttypes.h> includes <stdint.h>, if this is a C99 system. */