diff --git a/include/boost/core/uncaught_exceptions.hpp b/include/boost/core/uncaught_exceptions.hpp
index db7a7a1..27e2491 100644
--- a/include/boost/core/uncaught_exceptions.hpp
+++ b/include/boost/core/uncaught_exceptions.hpp
@@ -56,8 +56,10 @@
 // On Linux with clang and libc++ and on OS X, there is a version of cxxabi.h from libc++abi that doesn't declare __cxa_get_globals, but provides __cxa_uncaught_exceptions.
 // The function only appeared in version _LIBCPPABI_VERSION >= 1002 of the library. Unfortunately, there are linking errors about undefined reference to __cxa_uncaught_exceptions
 // on Ubuntu Trusty and OS X, so we avoid using it and forward-declare __cxa_get_globals instead.
-// On QNX SDP 7.0 (QCC 5.4.0), there are multiple cxxabi.h, one from glibcxx from gcc and another from libc++abi from LLVM. The latter is included first by qcc. It is missing
-// the declaration of __cxa_get_globals but it is also patched by QNX developers to not define _LIBCPPABI_VERSION. https://github.com/boostorg/core/issues/59
+// On QNX SDP 7.0 (QCC 5.4.0), there are multiple cxxabi.h, one from glibcxx from gcc and another from libc++abi from LLVM. Which one is included will be determined by the qcc
+// command line arguments (-V and/or -Y; http://www.qnx.com/developers/docs/7.0.0/#com.qnx.doc.neutrino.utilities/topic/q/qcc.html). The LLVM libc++abi is missing the declaration
+// of __cxa_get_globals but it is also patched by QNX developers to not define _LIBCPPABI_VERSION. Older QNX SDP versions, up to and including 6.6, don't provide LLVM and libc++abi.
+// See https://github.com/boostorg/core/issues/59.
 #if !defined(__FreeBSD__) && \
     ( \
         (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 407) || \