Only predefine the macro _GNU_SOURCE in C++ mode when we're on a
platform that typically uses glibc. Fixes a Boost.Thread compilation
failure.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101450 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/InitPreprocessor.cpp b/lib/Frontend/InitPreprocessor.cpp
index 8bcd3a8..aacae49 100644
--- a/lib/Frontend/InitPreprocessor.cpp
+++ b/lib/Frontend/InitPreprocessor.cpp
@@ -294,8 +294,30 @@
// C++ translation unit.
Builder.defineMacro("__cplusplus", "199711L");
Builder.defineMacro("__private_extern__", "extern");
- // Ugly hack to work with GNU libstdc++.
- Builder.defineMacro("_GNU_SOURCE");
+
+ // Define _GNU_SOURCE on platforms where we expect to use glibc.
+ switch (TI.getTriple().getOS()) {
+ case llvm::Triple::Cygwin:
+ case llvm::Triple::MinGW64:
+ case llvm::Triple::MinGW32:
+ case llvm::Triple::Linux:
+ case llvm::Triple::Solaris:
+ case llvm::Triple::AuroraUX:
+ Builder.defineMacro("_GNU_SOURCE");
+ break;
+
+ case llvm::Triple::Darwin:
+ case llvm::Triple::DragonFly:
+ case llvm::Triple::FreeBSD:
+ case llvm::Triple::UnknownOS:
+ case llvm::Triple::Lv2:
+ case llvm::Triple::NetBSD:
+ case llvm::Triple::OpenBSD:
+ case llvm::Triple::Psp:
+ case llvm::Triple::Win32:
+ case llvm::Triple::Haiku:
+ break;
+ }
}
if (LangOpts.Microsoft) {