elf.cc: if Boost libraries aren't visible to applications, don't report them

We have in elf.cc a list of libraries which are already fully included
inside the OSv kernel, so the user doesn't need to load another copy of
them. We have one Boost library in this list, but starting with Boost
version 1.69.0, Boost is compiled with hidden visibility - meaning that
the symbols in this library are *not* available to the application.
So if Boost is 1.69.0 or later, we shouldn't claim that the kernel contains
this library.

Refs #1040.

Signed-off-by: Nadav Har'El <[email protected]>
Message-Id: <[email protected]>

Author: nyh

core/elf.cc

@@ -26,6 +26,7 @@
 #include <osv/stubbing.hh>
 #include <sys/utsname.h>
 #include <osv/demangle.hh>
+#include <boost/version.hpp>
 
 #include "arch.hh"
 
@@ -1153,11 +1154,19 @@ program::program(void* addr)
           "libm.so.6",
 #ifdef __x86_64__
           "ld-linux-x86-64.so.2",
+          // As noted in issue #1040 Boost version 1.69.0 and above is
+          // compiled with hidden visibility, so even if the kernel uses
+          // this library, it will not be visible for the application and
+          // it will need to load its own version of this library.
+#if BOOST_VERSION < 106900
           "libboost_system.so.1.55.0",
+#endif
 #endif /* __x86_64__ */
 #ifdef __aarch64__
           "ld-linux-aarch64.so.1",
+#if BOOST_VERSION < 106900
           "libboost_system-mt.so.1.55.0",
+#endif
 #endif /* __aarch64__ */
           "libpthread.so.0",
           "libdl.so.2",