Apply workaround for Intel-16

Without this I see:
```
/boost/core/noncopyable.hpp(42): error: defaulted default constructor cannot be constexpr because the corresponding implicitly declared default constructor would not be constexpr
        BOOST_CONSTEXPR noncopyable() = default;
```
See: https://travis-ci.org/boostorg/type_traits/jobs/4722892817
Not sure if later Intel versions also require this... still working on that.

.travis.yml

@@ -240,7 +240,6 @@ matrix:
         apt:
           packages:
             - libc++-dev
-            - libc++abi-dev
 
     - os: linux
       compiler: clang++-libc++
@@ -249,40 +248,13 @@ matrix:
         apt:
           packages:
             - libc++-dev
-            - libc++abi-dev
 
     - os: osx
       compiler: clang++
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
-      osx_image: xcode7.3
-
-    - os: osx
-      compiler: clang++
-      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
-      osx_image: xcode8.3
-
-    - os: osx
-      compiler: clang++
-      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
-      osx_image: xcode9.4
-
-    - os: osx
-      compiler: clang++
-      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
-      osx_image: xcode10.1
-
-    - os: linux
-      compiler: g++
-      env: CMAKE_SUBDIR_TEST=1
-      script:
-      - cd libs/core/test/cmake_subdir_test && mkdir __build__ && cd __build__
-      - cmake ..
-      - cmake --build .
-      - cmake --build . --target check
 
 install:
-  - BOOST_BRANCH=develop
-  - if [ "$TRAVIS_BRANCH" = "master" ]; then BOOST_BRANCH=master; fi
+  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
   - cd ..
   - git clone -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
   - cd boost-root
@@ -302,8 +274,7 @@ install:
 script:
   - |-
     echo "using $TOOLSET : : $COMPILER ;" > ~/user-config.jam
-  - BUILD_JOBS=`(nproc || sysctl -n hw.ncpu) 2> /dev/null`
-  - ./b2 -j $BUILD_JOBS libs/core/test toolset=$TOOLSET cxxstd=$CXXSTD variant=debug,release ${UBSAN:+cxxflags=-fsanitize=undefined cxxflags=-fno-sanitize-recover=undefined linkflags=-fsanitize=undefined define=UBSAN=1 debug-symbols=on} ${LINKFLAGS:+linkflags=$LINKFLAGS}
+  - ./b2 -j 3 libs/core/test toolset=$TOOLSET cxxstd=$CXXSTD variant=debug,release ${UBSAN:+cxxflags=-fsanitize=undefined cxxflags=-fno-sanitize-recover=undefined linkflags=-fsanitize=undefined define=UBSAN=1 debug-symbols=on} ${LINKFLAGS:+linkflags=$LINKFLAGS}
 
 notifications:
   email:

appveyor.yml

@@ -73,4 +73,4 @@ build: off
 test_script:
   - PATH=%ADDPATH%%PATH%
   - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
-  - b2 -j %NUMBER_OF_PROCESSORS% libs/core/test toolset=%TOOLSET% %CXXSTD%
+  - b2 -j 3 libs/core/test toolset=%TOOLSET% %CXXSTD%

include/boost/core/noncopyable.hpp

@@ -38,7 +38,8 @@ namespace noncopyable_  // protection from unintended ADL
   class noncopyable: base_token
   {
   protected:
-#if !defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) && !defined(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS)
+#if !defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) && !defined(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS)\
+      && !BOOST_WORKAROUND(__ICC, <= 1600)
       BOOST_CONSTEXPR noncopyable() = default;
       ~noncopyable() = default;
 #else

include/boost/core/uncaught_exceptions.hpp

@@ -46,36 +46,20 @@
 #if defined(BOOST_CORE_HAS_CXXABI_H)
 // MinGW GCC 4.4 seem to not work the same way the newer GCC versions do. As a result, __cxa_get_globals based implementation will always return 0.
 // Just disable it for now and fall back to std::uncaught_exception().
-#if !(defined(__MINGW32__) && (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 405))
-#include <cxxabi.h>
-#include <cstring>
+#if !defined(__MINGW32__) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)))
 #define BOOST_CORE_HAS_CXA_GET_GLOBALS
-// At least on MinGW and Linux, only GCC since 4.7 declares __cxa_get_globals() in cxxabi.h. Older versions of GCC do not expose this function but it's there.
-// On OpenBSD, it seems, the declaration is also missing.
-// Note that at least on FreeBSD 11, cxxabi.h declares __cxa_get_globals with a different exception specification, so we can't declare the function unconditionally.
-// 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__) && \
-    ( \
-        (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 407) || \
-        defined(__OpenBSD__) || \
-        defined(_LIBCPPABI_VERSION) \
-    )
+#include <cxxabi.h>
+// Only GCC 4.7 declares __cxa_get_globals() in cxxabi.h, older compilers do not expose this function but it's there
+#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 407
 namespace __cxxabiv1 {
 struct __cxa_eh_globals;
-#if defined(__OpenBSD__)
-extern "C" __cxa_eh_globals* __cxa_get_globals();
-#else
 extern "C" __cxa_eh_globals* __cxa_get_globals() BOOST_NOEXCEPT_OR_NOTHROW __attribute__((__const__));
-#endif
 } // namespace __cxxabiv1
+#endif // defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 407
 #endif
-#endif // !(defined(__MINGW32__) && (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) < 405))
 #endif // defined(BOOST_CORE_HAS_CXXABI_H)
 
 #if defined(_MSC_VER) && _MSC_VER >= 1400
-#include <cstring>
 #define BOOST_CORE_HAS_GETPTD
 namespace boost {
 namespace core {
@@ -105,14 +89,10 @@ inline unsigned int uncaught_exceptions() BOOST_NOEXCEPT
     return static_cast< unsigned int >(std::uncaught_exceptions());
 #elif defined(BOOST_CORE_HAS_CXA_GET_GLOBALS)
     // Tested on {clang 3.2,GCC 3.5.6,GCC 4.1.2,GCC 4.4.6,GCC 4.4.7}x{x32,x64}
-    unsigned int count;
-    std::memcpy(&count, reinterpret_cast< const unsigned char* >(::abi::__cxa_get_globals()) + sizeof(void*), sizeof(count)); // __cxa_eh_globals::uncaughtExceptions, x32 offset - 0x4, x64 - 0x8
-    return count;
+    return *(reinterpret_cast< const unsigned int* >(reinterpret_cast< const char* >(::abi::__cxa_get_globals()) + sizeof(void*))); // __cxa_eh_globals::uncaughtExceptions, x32 offset - 0x4, x64 - 0x8
 #elif defined(BOOST_CORE_HAS_GETPTD)
     // MSVC specific. Tested on {MSVC2005SP1,MSVC2008SP1,MSVC2010SP1,MSVC2012}x{x32,x64}.
-    unsigned int count;
-    std::memcpy(&count, static_cast< const unsigned char* >(boost::core::detail::_getptd()) + (sizeof(void*) == 8u ? 0x100 : 0x90), sizeof(count)); // _tiddata::_ProcessingThrow, x32 offset - 0x90, x64 - 0x100
-    return count;
+    return *(reinterpret_cast< const unsigned int* >(static_cast< const char* >(boost::core::detail::_getptd()) + (sizeof(void*) == 8 ? 0x100 : 0x90))); // _tiddata::_ProcessingThrow, x32 offset - 0x90, x64 - 0x100
 #else
     // Portable C++03 implementation. Does not allow to detect multiple nested exceptions.
     return static_cast< unsigned int >(std::uncaught_exception());

test/cmake_subdir_test/CMakeLists.txt

@@ -1,19 +0,0 @@
-# Copyright 2018, 2019 Peter Dimov
-# Distributed under the Boost Software License, Version 1.0.
-# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
-
-cmake_minimum_required(VERSION 3.5)
-
-project(cmake_subdir_test LANGUAGES CXX)
-
-add_subdirectory(../.. boostorg/core)
-add_subdirectory(../../../assert boostorg/assert)
-add_subdirectory(../../../config boostorg/config)
-
-add_executable(quick ../quick.cpp)
-target_link_libraries(quick Boost::core)
-
-enable_testing()
-add_test(quick quick)
-
-add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)