Parse: Don't attempt to act on #pragma init_seg when not targeting MSVC

It doesn't really make sense to try and do stuff with #pragma init_seg
when targeting non-Microsoft platforms; notions like library vs user
initializers don't exist for other targets.

This fixes PR20639.

llvm-svn: 215618

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Parse/ParsePragma.cpp b/clang/lib/Parse/ParsePragma.cpp
index ecdef48f0e2..64066c1ec29 100644
--- a/clang/lib/Parse/ParsePragma.cpp
+++ b/clang/lib/Parse/ParsePragma.cpp
@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "RAIIObjectsForParser.h"
+#include "clang/Basic/TargetInfo.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Parse/ParseDiagnostic.h"
 #include "clang/Parse/Parser.h"
@@ -661,6 +662,11 @@ bool Parser::HandlePragmaMSSegment(StringRef PragmaName,
 // #pragma init_seg({ compiler | lib | user | "section-name" [, func-name]} )
 bool Parser::HandlePragmaMSInitSeg(StringRef PragmaName,
                                    SourceLocation PragmaLocation) {
+  if (getTargetInfo().getTriple().getEnvironment() != llvm::Triple::MSVC) {
+    PP.Diag(PragmaLocation, diag::warn_pragma_init_seg_unsupported_target);
+    return false;
+  }
+
   if (ExpectAndConsume(tok::l_paren, diag::warn_pragma_expected_lparen,
                        PragmaName))
     return false;