r340967 - Add predefined macro __gnu_linux__ for proper aux-triple

[Yaxun Liu via cfe-commits]

Author: yaxunl
Date: Wed Aug 29 13:39:22 2018
New Revision: 340967

URL: http://llvm.org/viewvc/llvm-project?rev=340967&view=rev
Log:
Add predefined macro __gnu_linux__ for proper aux-triple

Clang predefine macro __linx__ for aux-triple with Linux OS
but does not predefine macro __gnu_linux__. This causes
some compilation error for certain applications, e.g. Eigen.

This patch fixes that.

Differential Revision: https://reviews.llvm.org/D51441

Modified:
    cfe/trunk/lib/Frontend/InitPreprocessor.cpp
    cfe/trunk/test/Preprocessor/predefined-macros.c

Modified: cfe/trunk/lib/Frontend/InitPreprocessor.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/InitPreprocessor.cpp?rev=340967&r1=340966&r2=340967&view=diff
==============================================================================
--- cfe/trunk/lib/Frontend/InitPreprocessor.cpp (original)
+++ cfe/trunk/lib/Frontend/InitPreprocessor.cpp Wed Aug 29 13:39:22 2018
@@ -1128,6 +1128,7 @@ static void InitializePredefinedAuxMacro
   if (AuxTriple.getOS() == llvm::Triple::Linux) {
     Builder.defineMacro("__ELF__");
     Builder.defineMacro("__linux__");
+    Builder.defineMacro("__gnu_linux__");
     // Used in features.h. If this is omitted, math.h doesn't declare float
     // versions of the functions in bits/mathcalls.h.
     if (LangOpts.CPlusPlus)

Modified: cfe/trunk/test/Preprocessor/predefined-macros.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Preprocessor/predefined-macros.c?rev=340967&r1=340966&r2=340967&view=diff
==============================================================================
--- cfe/trunk/test/Preprocessor/predefined-macros.c (original)
+++ cfe/trunk/test/Preprocessor/predefined-macros.c Wed Aug 29 13:39:22 2018
@@ -183,9 +183,11 @@
 // CHECK-HIP: #define __HIP__ 1
 
 // RUN: %clang_cc1 %s -E -dM -o - -x hip -triple amdgcn-amd-amdhsa \
-// RUN:   -fcuda-is-device \
+// RUN:   -aux-triple x86_64-unknown-linux -fcuda-is-device \
 // RUN:   | FileCheck -match-full-lines %s --check-prefix=CHECK-HIP-DEV
 // CHECK-HIP-DEV-NOT: #define __CUDA_ARCH__
 // CHECK-HIP-DEV: #define __HIPCC__ 1
 // CHECK-HIP-DEV: #define __HIP_DEVICE_COMPILE__ 1
 // CHECK-HIP-DEV: #define __HIP__ 1
+// CHECK_HIP-DEV: #define __linux__ 1
+// CHECK_HIP-DEV: #define __gnu_linux__ 1