Fix build with GNU libstdc++ C++11 ABI

[lyx.git] / src / support / debug.h

diff --git a/src/support/debug.h b/src/support/debug.h
index 34258073b9bd7e64b26d25fc65ed40b7b6e3cdb1..f8ee6591b197e688c62b02d8d9db7ddbb9cc4a60 100644 (file)
--- a/src/support/debug.h
+++ b/src/support/debug.h
@@ -20,7 +20,7 @@
 // Forward definitions do not work with libc++
 // but ios_base has already been defined in strfwd
 // if compiling with it
-#ifndef  _LIBCPP_VERSION
+#ifndef USE_LLVM_LIBCPP
 namespace std {
 
 class ios_base;