[Basic] Define __declspec for cygwin

Cygwin (and MinGW) targets define __declspec to __attribute__ unless
-fms-extensions is specified.  It turns out that cygwin headers rely on
the existence of this macro.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@238394 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index a768081e70e0d4636e545defe1e9f52fbd9c5682..76b5f579508155c332281159839f600bf3b5763d 100644 (file)
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3596,11 +3596,8 @@ public:
 };
 } // end anonymous namespace
 
-static void addMinGWDefines(const LangOptions &Opts, MacroBuilder &Builder) {
-  Builder.defineMacro("__MSVCRT__");
-  Builder.defineMacro("__MINGW32__");
-
-  // Mingw defines __declspec(a) to __attribute__((a)).  Clang supports
+static void addCygMingDefines(const LangOptions &Opts, MacroBuilder &Builder) {
+  // Mingw and cygwin define __declspec(a) to __attribute__((a)).  Clang supports
   // __declspec natively under -fms-extensions, but we define a no-op __declspec
   // macro anyway for pre-processor compatibility.
   if (Opts.MicrosoftExt)
@@ -3623,6 +3620,12 @@ static void addMinGWDefines(const LangOptions &Opts, MacroBuilder &Builder) {
   }
 }
 
+static void addMinGWDefines(const LangOptions &Opts, MacroBuilder &Builder) {
+  Builder.defineMacro("__MSVCRT__");
+  Builder.defineMacro("__MINGW32__");
+  addCygMingDefines(Opts, Builder);
+}
+
 namespace {
 // x86-32 MinGW target
 class MinGWX86_32TargetInfo : public WindowsX86_32TargetInfo {
@@ -3655,6 +3658,7 @@ public:
     Builder.defineMacro("_X86_");
     Builder.defineMacro("__CYGWIN__");
     Builder.defineMacro("__CYGWIN32__");
+    addCygMingDefines(Opts, Builder);
     DefineStd(Builder, "unix", Opts);
     if (Opts.CPlusPlus)
       Builder.defineMacro("_GNU_SOURCE");

diff --git a/test/Preprocessor/init.c b/test/Preprocessor/init.c
index 91ec4d77b5cc07f6618c7d63c98ca41637776ce1..c5dff25f04269ade0fe7ee6cfaf2b7ccdeb8cc8e 100644 (file)
--- a/test/Preprocessor/init.c
+++ b/test/Preprocessor/init.c
@@ -2793,6 +2793,12 @@
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=i386-netbsd6 -target-feature +sse2 < /dev/null | FileCheck -check-prefix I386-NETBSD6-SSE %s
 // I386-NETBSD6-SSE:#define __FLT_EVAL_METHOD__ 1
 
+// RUN: %clang_cc1 -E -dM -triple=i686-pc-mingw32 < /dev/null | FileCheck -check-prefix I386-DECLSPEC %s
+// RUN: %clang_cc1 -E -dM -fms-extensions -triple=i686-pc-mingw32 < /dev/null | FileCheck -check-prefix I386-DECLSPEC %s
+// RUN: %clang_cc1 -E -dM -triple=i686-unknown-cygwin < /dev/null | FileCheck -check-prefix I386-DECLSPEC %s
+// RUN: %clang_cc1 -E -dM -fms-extensions -triple=i686-unknown-cygwin < /dev/null | FileCheck -check-prefix I386-DECLSPEC %s
+// I386-DECLSPEC: #define __declspec
+
 //
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=mips-none-none < /dev/null | FileCheck -check-prefix MIPS32BE %s
 //
@@ -8346,6 +8352,10 @@
 // PS4:#define __x86_64 1
 // PS4:#define __x86_64__ 1
 //
+// RUN: %clang_cc1 -E -dM -triple=x86_64-pc-mingw32 < /dev/null | FileCheck -check-prefix X86-64-DECLSPEC %s
+// RUN: %clang_cc1 -E -dM -fms-extensions -triple=x86_64-unknown-mingw32 < /dev/null | FileCheck -check-prefix X86-64-DECLSPEC %s
+// X86-64-DECLSPEC: #define __declspec
+//
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=sparc64-none-none < /dev/null | FileCheck -check-prefix SPARCV9 %s
 // SPARCV9:#define __INT64_TYPE__ long int
 // SPARCV9:#define __INTMAX_C_SUFFIX__ L