diff --git a/include/boost/re_detail/regex_config.hpp b/include/boost/re_detail/regex_config.hpp
index 6d27f254..3aba5933 100644
--- a/include/boost/re_detail/regex_config.hpp
+++ b/include/boost/re_detail/regex_config.hpp
@@ -49,7 +49,15 @@ Do not change this file unless you really really have to, add options to
 #include <string>
 #include <boost/smart_ptr.hpp>
 #else
+//
+// C build,
+// don't include <boost/config.hpp> because that may
+// do C++ specific things in future...
+//
 #include <stdlib.h>
+#ifdef _MSC_VER
+#define BOOST_MSVC _MSC_VER
+#endif
 #endif
 
 /* this will increase in future versions: */
@@ -201,7 +209,7 @@ Do not change this file unless you really really have to, add options to
       #define BOOST_RE_NO_STRING_DEF_ARGS
    #endif
 
-   #ifndef _CPPUNWIND
+   #if !defined(_CPPUNWIND) && defined(__cplusplus)
       #error exception handling support required
    #endif
 
@@ -1211,5 +1219,6 @@ namespace std{
 
 
 
+
 
 
diff --git a/include/boost/regex.h b/include/boost/regex.h
index e0a2ccd8..af64f18e 100644
--- a/include/boost/regex.h
+++ b/include/boost/regex.h
@@ -54,6 +54,11 @@ using boost::REG_ASSERT;
 using boost::REG_INVARG;
 using boost::REG_ATOI;
 using boost::REG_ITOA;
+
+using boost::REG_NOTBOL;
+using boost::REG_NOTEOL;
+using boost::REG_STARTEND;
+
 using boost::reg_comp_flags;
 using boost::reg_exec_flags;
 using boost::regcompA;
@@ -93,3 +98,4 @@ using boost::reg_errcode_t;
 #endif // __cplusplus
 
 #endif // BOOST_RE_REGEX_H
+