$NetBSD: patch-libs_fiber_build_Jamfile.v2,v 1.2 2021/01/01 08:19:02 ryoon Exp $

Build with -fvisibility=hidden on SunOS.

--- libs/fiber/build/Jamfile.v2.orig	2020-08-11 14:55:48.000000000 +0000
+++ libs/fiber/build/Jamfile.v2
@@ -24,6 +24,7 @@ project boost/fiber
       <target-os>linux,<toolset>gcc,<segmented-stacks>on:<cxxflags>-DBOOST_USE_SEGMENTED_STACKS
       <toolset>clang,<segmented-stacks>on:<cxxflags>-fsplit-stack
       <toolset>clang,<segmented-stacks>on:<cxxflags>-DBOOST_USE_SEGMENTED_STACKS
+      <target-os>solaris:<cxxflags>-fvisibility=hidden
       <link>shared:<define>BOOST_FIBERS_DYN_LINK=1
       <define>BOOST_FIBERS_SOURCE
       <threading>multi