--- boost/core/uncaught_exceptions.hpp.orig	2019-04-09 21:35:30.000000000 +0200
+++ boost/core/uncaught_exceptions.hpp	2020-06-30 20:25:20.004402000 +0200
@@ -56,7 +56,7 @@
 // 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.
-#if !defined(__FreeBSD__) && \
+#if !defined(__FreeBSD__) && !defined(__BSDSUniX__) && \
     ( \
         (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 407) || \
         defined(__OpenBSD__) || \