Update to boost 1.72

[lyx.git] / 3rdparty / boost / libs / regex / src / w32_regex_traits.cpp

diff --git a/3rdparty/boost/libs/regex/src/w32_regex_traits.cpp b/3rdparty/boost/libs/regex/src/w32_regex_traits.cpp
index 0f825702477ff981e5e16cf1fa4b38a16486faef..5b5236aa884cd382df25623162ca977ff1fa4afd 100644 (file)
--- a/3rdparty/boost/libs/regex/src/w32_regex_traits.cpp
+++ b/3rdparty/boost/libs/regex/src/w32_regex_traits.cpp
@@ -23,7 +23,9 @@
 #include <boost/regex/regex_traits.hpp>
 #include <boost/regex/pattern_except.hpp>
 
-#define WIN32_LEAN_AND_MEAN
+#ifndef WIN32_LEAN_AND_MEAN
+#  define WIN32_LEAN_AND_MEAN
+#endif
 #ifndef NOMINMAX
 #  define NOMINMAX
 #endif