Add some comments explaining what MVT and EVT are, and how they differ.

[oota-llvm.git] / include / llvm / System / FEnv.h

diff --git a/include/llvm/System/FEnv.h b/include/llvm/System/FEnv.h
index 57097d2f57a71fc61c033ad9bc9a824d20bab855..042e43928bcf727db300478ab1d7cedbc7d61170 100644 (file)
--- a/include/llvm/System/FEnv.h
+++ b/include/llvm/System/FEnv.h
@@ -21,6 +21,12 @@
 #include <fenv.h>
 #endif
 
+// FIXME: Clang's #include handling apparently doesn't work for libstdc++'s
+// fenv.h; see PR6907 for details.
+#if defined(__clang__) && defined(_GLIBCXX_FENV_H)
+#undef HAVE_FENV_H
+#endif
+
 namespace llvm {
 namespace sys {