sci-visualization/spyview: Add missing autoconf macro

Package-Manager: Portage-2.3.5, Repoman-2.3.2

1 files changed, 1000 insertions, 2 deletions

diff --git a/sci-visualization/spyview/files/spyview-20150124-gcc6cxx14-9.patch b/sci-visualization/spyview/files/spyview-20150124-gcc6cxx14-9.patch
index 0f302314b190..0c19851d4459 100644
--- a/sci-visualization/spyview/files/spyview-20150124-gcc6cxx14-9.patch
+++ b/sci-visualization/spyview/files/spyview-20150124-gcc6cxx14-9.patch
@@ -1,8 +1,18 @@
 diff --git a/configure.ac b/configure.ac
-index 5e1cfff..8850ce8 100644
+index 5e1cfff..f1d777f 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -27,6 +27,10 @@ AM_CONDITIONAL(WINDOWS,test $windows_target = yes)
+@@ -6,6 +6,9 @@ AC_CONFIG_SRCDIR([spyview/ImageWindow.C])
+ AC_CONFIG_HEADER([config.h])
+ USER_DIRS
+ 
++# For local macros
++AC_CONFIG_MACRO_DIR([m4])
++
+ #
+ # Work out our target
+ #
+@@ -27,6 +30,10 @@ AM_CONDITIONAL(WINDOWS,test $windows_target = yes)
  AC_PROG_CXX
  AC_PROG_CC
  AM_PROG_CC_C_O
@@ -13,6 +23,994 @@ index 5e1cfff..8850ce8 100644
  # Check for fluid
  AC_PATH_PROG(FLUID,fluid,none)
  AC_ARG_VAR(FLUID,[path to executable to compile .fl files])
+diff --git a/m4/ax_cxx_compile_stdcxx.m4 b/m4/ax_cxx_compile_stdcxx.m4
+new file mode 100644
+index 0000000..5032bba
+--- /dev/null
++++ b/m4/ax_cxx_compile_stdcxx.m4
+@@ -0,0 +1,982 @@
++# ===========================================================================
++#  https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html
++# ===========================================================================
++#
++# SYNOPSIS
++#
++#   AX_CXX_COMPILE_STDCXX(VERSION, [ext|noext], [mandatory|optional])
++#
++# DESCRIPTION
++#
++#   Check for baseline language coverage in the compiler for the specified
++#   version of the C++ standard.  If necessary, add switches to CXX and
++#   CXXCPP to enable support.  VERSION may be '11' (for the C++11 standard)
++#   or '14' (for the C++14 standard).
++#
++#   The second argument, if specified, indicates whether you insist on an
++#   extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g.
++#   -std=c++11).  If neither is specified, you get whatever works, with
++#   preference for an extended mode.
++#
++#   The third argument, if specified 'mandatory' or if left unspecified,
++#   indicates that baseline support for the specified C++ standard is
++#   required and that the macro should error out if no mode with that
++#   support is found.  If specified 'optional', then configuration proceeds
++#   regardless, after defining HAVE_CXX${VERSION} if and only if a
++#   supporting mode is found.
++#
++# LICENSE
++#
++#   Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
++#   Copyright (c) 2012 Zack Weinberg <zackw@panix.com>
++#   Copyright (c) 2013 Roy Stogner <roystgnr@ices.utexas.edu>
++#   Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
++#   Copyright (c) 2015 Paul Norman <penorman@mac.com>
++#   Copyright (c) 2015 Moritz Klammler <moritz@klammler.eu>
++#   Copyright (c) 2016 Krzesimir Nowak <qdlacz@gmail.com>
++#
++#   Copying and distribution of this file, with or without modification, are
++#   permitted in any medium without royalty provided the copyright notice
++#   and this notice are preserved.  This file is offered as-is, without any
++#   warranty.
++
++#serial 7
++
++dnl  This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
++dnl  (serial version number 13).
++
++AX_REQUIRE_DEFINED([AC_MSG_WARN])
++AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
++  m4_if([$1], [11], [ax_cxx_compile_alternatives="11 0x"],
++        [$1], [14], [ax_cxx_compile_alternatives="14 1y"],
++        [$1], [17], [ax_cxx_compile_alternatives="17 1z"],
++        [m4_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl
++  m4_if([$2], [], [],
++        [$2], [ext], [],
++        [$2], [noext], [],
++        [m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl
++  m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true],
++        [$3], [mandatory], [ax_cxx_compile_cxx$1_required=true],
++        [$3], [optional], [ax_cxx_compile_cxx$1_required=false],
++        [m4_fatal([invalid third argument `$3' to AX_CXX_COMPILE_STDCXX])])
++  AC_LANG_PUSH([C++])dnl
++  ac_success=no
++  AC_CACHE_CHECK(whether $CXX supports C++$1 features by default,
++  ax_cv_cxx_compile_cxx$1,
++  [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
++    [ax_cv_cxx_compile_cxx$1=yes],
++    [ax_cv_cxx_compile_cxx$1=no])])
++  if test x$ax_cv_cxx_compile_cxx$1 = xyes; then
++    ac_success=yes
++  fi
++
++  m4_if([$2], [noext], [], [dnl
++  if test x$ac_success = xno; then
++    for alternative in ${ax_cxx_compile_alternatives}; do
++      switch="-std=gnu++${alternative}"
++      cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
++      AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
++                     $cachevar,
++        [ac_save_CXX="$CXX"
++         CXX="$CXX $switch"
++         AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
++          [eval $cachevar=yes],
++          [eval $cachevar=no])
++         CXX="$ac_save_CXX"])
++      if eval test x\$$cachevar = xyes; then
++        CXX="$CXX $switch"
++        if test -n "$CXXCPP" ; then
++          CXXCPP="$CXXCPP $switch"
++        fi
++        ac_success=yes
++        break
++      fi
++    done
++  fi])
++
++  m4_if([$2], [ext], [], [dnl
++  if test x$ac_success = xno; then
++    dnl HP's aCC needs +std=c++11 according to:
++    dnl http://h21007.www2.hp.com/portal/download/files/unprot/aCxx/PDF_Release_Notes/769149-001.pdf
++    dnl Cray's crayCC needs "-h std=c++11"
++    for alternative in ${ax_cxx_compile_alternatives}; do
++      for switch in -std=c++${alternative} +std=c++${alternative} "-h std=c++${alternative}"; do
++        cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch])
++        AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch,
++                       $cachevar,
++          [ac_save_CXX="$CXX"
++           CXX="$CXX $switch"
++           AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])],
++            [eval $cachevar=yes],
++            [eval $cachevar=no])
++           CXX="$ac_save_CXX"])
++        if eval test x\$$cachevar = xyes; then
++          CXX="$CXX $switch"
++          if test -n "$CXXCPP" ; then
++            CXXCPP="$CXXCPP $switch"
++          fi
++          ac_success=yes
++          break
++        fi
++      done
++      if test x$ac_success = xyes; then
++        break
++      fi
++    done
++  fi])
++  AC_LANG_POP([C++])
++  if test x$ax_cxx_compile_cxx$1_required = xtrue; then
++    if test x$ac_success = xno; then
++      AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.])
++    fi
++  fi
++  if test x$ac_success = xno; then
++    HAVE_CXX$1=0
++    AC_MSG_NOTICE([No compiler with C++$1 support was found])
++  else
++    HAVE_CXX$1=1
++    AC_DEFINE(HAVE_CXX$1,1,
++              [define if the compiler supports basic C++$1 syntax])
++  fi
++  AC_SUBST(HAVE_CXX$1)
++  m4_if([$1], [17], [AC_MSG_WARN([C++17 is not yet standardized, so the checks may change in incompatible ways anytime])])
++])
++
++
++dnl  Test body for checking C++11 support
++
++m4_define([_AX_CXX_COMPILE_STDCXX_testbody_11],
++  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
++)
++
++
++dnl  Test body for checking C++14 support
++
++m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14],
++  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
++  _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
++)
++
++m4_define([_AX_CXX_COMPILE_STDCXX_testbody_17],
++  _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
++  _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
++  _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
++)
++
++dnl  Tests for new features in C++11
++
++m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[
++
++// If the compiler admits that it is not ready for C++11, why torture it?
++// Hopefully, this will speed up the test.
++
++#ifndef __cplusplus
++
++#error "This is not a C++ compiler"
++
++#elif __cplusplus < 201103L
++
++#error "This is not a C++11 compiler"
++
++#else
++
++namespace cxx11
++{
++
++  namespace test_static_assert
++  {
++
++    template <typename T>
++    struct check
++    {
++      static_assert(sizeof(int) <= sizeof(T), "not big enough");
++    };
++
++  }
++
++  namespace test_final_override
++  {
++
++    struct Base
++    {
++      virtual void f() {}
++    };
++
++    struct Derived : public Base
++    {
++      virtual void f() override {}
++    };
++
++  }
++
++  namespace test_double_right_angle_brackets
++  {
++
++    template < typename T >
++    struct check {};
++
++    typedef check<void> single_type;
++    typedef check<check<void>> double_type;
++    typedef check<check<check<void>>> triple_type;
++    typedef check<check<check<check<void>>>> quadruple_type;
++
++  }
++
++  namespace test_decltype
++  {
++
++    int
++    f()
++    {
++      int a = 1;
++      decltype(a) b = 2;
++      return a + b;
++    }
++
++  }
++
++  namespace test_type_deduction
++  {
++
++    template < typename T1, typename T2 >
++    struct is_same
++    {
++      static const bool value = false;
++    };
++
++    template < typename T >
++    struct is_same<T, T>
++    {
++      static const bool value = true;
++    };
++
++    template < typename T1, typename T2 >
++    auto
++    add(T1 a1, T2 a2) -> decltype(a1 + a2)
++    {
++      return a1 + a2;
++    }
++
++    int
++    test(const int c, volatile int v)
++    {
++      static_assert(is_same<int, decltype(0)>::value == true, "");
++      static_assert(is_same<int, decltype(c)>::value == false, "");
++      static_assert(is_same<int, decltype(v)>::value == false, "");
++      auto ac = c;
++      auto av = v;
++      auto sumi = ac + av + 'x';
++      auto sumf = ac + av + 1.0;
++      static_assert(is_same<int, decltype(ac)>::value == true, "");
++      static_assert(is_same<int, decltype(av)>::value == true, "");
++      static_assert(is_same<int, decltype(sumi)>::value == true, "");
++      static_assert(is_same<int, decltype(sumf)>::value == false, "");
++      static_assert(is_same<int, decltype(add(c, v))>::value == true, "");
++      return (sumf > 0.0) ? sumi : add(c, v);
++    }
++
++  }
++
++  namespace test_noexcept
++  {
++
++    int f() { return 0; }
++    int g() noexcept { return 0; }
++
++    static_assert(noexcept(f()) == false, "");
++    static_assert(noexcept(g()) == true, "");
++
++  }
++
++  namespace test_constexpr
++  {
++
++    template < typename CharT >
++    unsigned long constexpr
++    strlen_c_r(const CharT *const s, const unsigned long acc) noexcept
++    {
++      return *s ? strlen_c_r(s + 1, acc + 1) : acc;
++    }
++
++    template < typename CharT >
++    unsigned long constexpr
++    strlen_c(const CharT *const s) noexcept
++    {
++      return strlen_c_r(s, 0UL);
++    }
++
++    static_assert(strlen_c("") == 0UL, "");
++    static_assert(strlen_c("1") == 1UL, "");
++    static_assert(strlen_c("example") == 7UL, "");
++    static_assert(strlen_c("another\0example") == 7UL, "");
++
++  }
++
++  namespace test_rvalue_references
++  {
++
++    template < int N >
++    struct answer
++    {
++      static constexpr int value = N;
++    };
++
++    answer<1> f(int&)       { return answer<1>(); }
++    answer<2> f(const int&) { return answer<2>(); }
++    answer<3> f(int&&)      { return answer<3>(); }
++
++    void
++    test()
++    {
++      int i = 0;
++      const int c = 0;
++      static_assert(decltype(f(i))::value == 1, "");
++      static_assert(decltype(f(c))::value == 2, "");
++      static_assert(decltype(f(0))::value == 3, "");
++    }
++
++  }
++
++  namespace test_uniform_initialization
++  {
++
++    struct test
++    {
++      static const int zero {};
++      static const int one {1};
++    };
++
++    static_assert(test::zero == 0, "");
++    static_assert(test::one == 1, "");
++
++  }
++
++  namespace test_lambdas
++  {
++
++    void
++    test1()
++    {
++      auto lambda1 = [](){};
++      auto lambda2 = lambda1;
++      lambda1();
++      lambda2();
++    }
++
++    int
++    test2()
++    {
++      auto a = [](int i, int j){ return i + j; }(1, 2);
++      auto b = []() -> int { return '0'; }();
++      auto c = [=](){ return a + b; }();
++      auto d = [&](){ return c; }();
++      auto e = [a, &b](int x) mutable {
++        const auto identity = [](int y){ return y; };
++        for (auto i = 0; i < a; ++i)
++          a += b--;
++        return x + identity(a + b);
++      }(0);
++      return a + b + c + d + e;
++    }
++
++    int
++    test3()
++    {
++      const auto nullary = [](){ return 0; };
++      const auto unary = [](int x){ return x; };
++      using nullary_t = decltype(nullary);
++      using unary_t = decltype(unary);
++      const auto higher1st = [](nullary_t f){ return f(); };
++      const auto higher2nd = [unary](nullary_t f1){
++        return [unary, f1](unary_t f2){ return f2(unary(f1())); };
++      };
++      return higher1st(nullary) + higher2nd(nullary)(unary);
++    }
++
++  }
++
++  namespace test_variadic_templates
++  {
++
++    template <int...>
++    struct sum;
++
++    template <int N0, int... N1toN>
++    struct sum<N0, N1toN...>
++    {
++      static constexpr auto value = N0 + sum<N1toN...>::value;
++    };
++
++    template <>
++    struct sum<>
++    {
++      static constexpr auto value = 0;
++    };
++
++    static_assert(sum<>::value == 0, "");
++    static_assert(sum<1>::value == 1, "");
++    static_assert(sum<23>::value == 23, "");
++    static_assert(sum<1, 2>::value == 3, "");
++    static_assert(sum<5, 5, 11>::value == 21, "");
++    static_assert(sum<2, 3, 5, 7, 11, 13>::value == 41, "");
++
++  }
++
++  // http://stackoverflow.com/questions/13728184/template-aliases-and-sfinae
++  // Clang 3.1 fails with headers of libstd++ 4.8.3 when using std::function
++  // because of this.
++  namespace test_template_alias_sfinae
++  {
++
++    struct foo {};
++
++    template<typename T>
++    using member = typename T::member_type;
++
++    template<typename T>
++    void func(...) {}
++
++    template<typename T>
++    void func(member<T>*) {}
++
++    void test();
++
++    void test() { func<foo>(0); }
++
++  }
++
++}  // namespace cxx11
++
++#endif  // __cplusplus >= 201103L
++
++]])
++
++
++dnl  Tests for new features in C++14
++
++m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_14], [[
++
++// If the compiler admits that it is not ready for C++14, why torture it?
++// Hopefully, this will speed up the test.
++
++#ifndef __cplusplus
++
++#error "This is not a C++ compiler"
++
++#elif __cplusplus < 201402L
++
++#error "This is not a C++14 compiler"
++
++#else
++
++namespace cxx14
++{
++
++  namespace test_polymorphic_lambdas
++  {
++
++    int
++    test()
++    {
++      const auto lambda = [](auto&&... args){
++        const auto istiny = [](auto x){
++          return (sizeof(x) == 1UL) ? 1 : 0;
++        };
++        const int aretiny[] = { istiny(args)... };
++        return aretiny[0];
++      };
++      return lambda(1, 1L, 1.0f, '1');
++    }
++
++  }
++
++  namespace test_binary_literals
++  {
++
++    constexpr auto ivii = 0b0000000000101010;
++    static_assert(ivii == 42, "wrong value");
++
++  }
++
++  namespace test_generalized_constexpr
++  {
++
++    template < typename CharT >
++    constexpr unsigned long
++    strlen_c(const CharT *const s) noexcept
++    {
++      auto length = 0UL;
++      for (auto p = s; *p; ++p)
++        ++length;
++      return length;
++    }
++
++    static_assert(strlen_c("") == 0UL, "");
++    static_assert(strlen_c("x") == 1UL, "");
++    static_assert(strlen_c("test") == 4UL, "");
++    static_assert(strlen_c("another\0test") == 7UL, "");
++
++  }
++
++  namespace test_lambda_init_capture
++  {
++
++    int
++    test()
++    {
++      auto x = 0;
++      const auto lambda1 = [a = x](int b){ return a + b; };
++      const auto lambda2 = [a = lambda1(x)](){ return a; };
++      return lambda2();
++    }
++
++  }
++
++  namespace test_digit_separators
++  {
++
++    constexpr auto ten_million = 100'000'000;
++    static_assert(ten_million == 100000000, "");
++
++  }
++
++  namespace test_return_type_deduction
++  {
++
++    auto f(int& x) { return x; }
++    decltype(auto) g(int& x) { return x; }
++
++    template < typename T1, typename T2 >
++    struct is_same
++    {
++      static constexpr auto value = false;
++    };
++
++    template < typename T >
++    struct is_same<T, T>
++    {
++      static constexpr auto value = true;
++    };
++
++    int
++    test()
++    {
++      auto x = 0;
++      static_assert(is_same<int, decltype(f(x))>::value, "");
++      static_assert(is_same<int&, decltype(g(x))>::value, "");
++      return x;
++    }
++
++  }
++
++}  // namespace cxx14
++
++#endif  // __cplusplus >= 201402L
++
++]])
++
++
++dnl  Tests for new features in C++17
++
++m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[
++
++// If the compiler admits that it is not ready for C++17, why torture it?
++// Hopefully, this will speed up the test.
++
++#ifndef __cplusplus
++
++#error "This is not a C++ compiler"
++
++#elif __cplusplus <= 201402L
++
++#error "This is not a C++17 compiler"
++
++#else
++
++#if defined(__clang__)
++  #define REALLY_CLANG
++#else
++  #if defined(__GNUC__)
++    #define REALLY_GCC
++  #endif
++#endif
++
++#include <initializer_list>
++#include <utility>
++#include <type_traits>
++
++namespace cxx17
++{
++
++#if !defined(REALLY_CLANG)
++  namespace test_constexpr_lambdas
++  {
++
++    // TODO: test it with clang++ from git
++
++    constexpr int foo = [](){return 42;}();
++
++  }
++#endif // !defined(REALLY_CLANG)
++
++  namespace test::nested_namespace::definitions
++  {
++
++  }
++
++  namespace test_fold_expression
++  {
++
++    template<typename... Args>
++    int multiply(Args... args)
++    {
++      return (args * ... * 1);
++    }
++
++    template<typename... Args>
++    bool all(Args... args)
++    {
++      return (args && ...);
++    }
++
++  }
++
++  namespace test_extended_static_assert
++  {
++
++    static_assert (true);
++
++  }
++
++  namespace test_auto_brace_init_list
++  {
++
++    auto foo = {5};
++    auto bar {5};
++
++    static_assert(std::is_same<std::initializer_list<int>, decltype(foo)>::value);
++    static_assert(std::is_same<int, decltype(bar)>::value);
++  }
++
++  namespace test_typename_in_template_template_parameter
++  {
++
++    template<template<typename> typename X> struct D;
++
++  }
++
++  namespace test_fallthrough_nodiscard_maybe_unused_attributes
++  {
++
++    int f1()
++    {
++      return 42;
++    }
++
++    [[nodiscard]] int f2()
++    {
++      [[maybe_unused]] auto unused = f1();
++
++      switch (f1())
++      {
++      case 17:
++        f1();
++        [[fallthrough]];
++      case 42:
++        f1();
++      }
++      return f1();
++    }
++
++  }
++
++  namespace test_extended_aggregate_initialization
++  {
++
++    struct base1
++    {
++      int b1, b2 = 42;
++    };
++
++    struct base2
++    {
++      base2() {
++        b3 = 42;
++      }
++      int b3;
++    };
++
++    struct derived : base1, base2
++    {
++        int d;
++    };
++
++    derived d1 {{1, 2}, {}, 4};  // full initialization
++    derived d2 {{}, {}, 4};      // value-initialized bases
++
++  }
++
++  namespace test_general_range_based_for_loop
++  {
++
++    struct iter
++    {
++      int i;
++
++      int& operator* ()
++      {
++        return i;
++      }
++
++      const int& operator* () const
++      {
++        return i;
++      }
++
++      iter& operator++()
++      {
++        ++i;
++        return *this;
++      }
++    };
++
++    struct sentinel
++    {
++      int i;
++    };
++
++    bool operator== (const iter& i, const sentinel& s)
++    {
++      return i.i == s.i;
++    }
++
++    bool operator!= (const iter& i, const sentinel& s)
++    {
++      return !(i == s);
++    }
++
++    struct range
++    {
++      iter begin() const
++      {
++        return {0};
++      }
++
++      sentinel end() const
++      {
++        return {5};
++      }
++    };
++
++    void f()
++    {
++      range r {};
++
++      for (auto i : r)
++      {
++        [[maybe_unused]] auto v = i;
++      }
++    }
++
++  }
++
++  namespace test_lambda_capture_asterisk_this_by_value
++  {
++
++    struct t
++    {
++      int i;
++      int foo()
++      {
++        return [*this]()
++        {
++          return i;
++        }();
++      }
++    };
++
++  }
++
++  namespace test_enum_class_construction
++  {
++
++    enum class byte : unsigned char
++    {};
++
++    byte foo {42};
++
++  }
++
++  namespace test_constexpr_if
++  {
++
++    template <bool cond>
++    int f ()
++    {
++      if constexpr(cond)
++      {
++        return 13;
++      }
++      else
++      {
++        return 42;
++      }
++    }
++
++  }
++
++  namespace test_selection_statement_with_initializer
++  {
++
++    int f()
++    {
++      return 13;
++    }
++
++    int f2()
++    {
++      if (auto i = f(); i > 0)
++      {
++        return 3;
++      }
++
++      switch (auto i = f(); i + 4)
++      {
++      case 17:
++        return 2;
++
++      default:
++        return 1;
++      }
++    }
++
++  }
++
++#if !defined(REALLY_CLANG)
++  namespace test_template_argument_deduction_for_class_templates
++  {
++
++    // TODO: test it with clang++ from git
++
++    template <typename T1, typename T2>
++    struct pair
++    {
++      pair (T1 p1, T2 p2)
++        : m1 {p1},
++          m2 {p2}
++      {}
++
++      T1 m1;
++      T2 m2;
++    };
++
++    void f()
++    {
++      [[maybe_unused]] auto p = pair{13, 42u};
++    }
++
++  }
++#endif // !defined(REALLY_CLANG)
++
++  namespace test_non_type_auto_template_parameters
++  {
++
++    template <auto n>
++    struct B
++    {};
++
++    B<5> b1;
++    B<'a'> b2;
++
++  }
++
++#if !defined(REALLY_CLANG)
++  namespace test_structured_bindings
++  {
++
++    // TODO: test it with clang++ from git
++
++    int arr[2] = { 1, 2 };
++    std::pair<int, int> pr = { 1, 2 };
++
++    auto f1() -> int(&)[2]
++    {
++      return arr;
++    }
++
++    auto f2() -> std::pair<int, int>&
++    {
++      return pr;
++    }
++
++    struct S
++    {
++      int x1 : 2;
++      volatile double y1;
++    };
++
++    S f3()
++    {
++      return {};
++    }
++
++    auto [ x1, y1 ] = f1();
++    auto& [ xr1, yr1 ] = f1();
++    auto [ x2, y2 ] = f2();
++    auto& [ xr2, yr2 ] = f2();
++    const auto [ x3, y3 ] = f3();
++
++  }
++#endif // !defined(REALLY_CLANG)
++
++#if !defined(REALLY_CLANG)
++  namespace test_exception_spec_type_system
++  {
++
++    // TODO: test it with clang++ from git
++
++    struct Good {};
++    struct Bad {};
++
++    void g1() noexcept;
++    void g2();
++
++    template<typename T>
++    Bad
++    f(T*, T*);
++
++    template<typename T1, typename T2>
++    Good
++    f(T1*, T2*);
++
++    static_assert (std::is_same_v<Good, decltype(f(g1, g2))>);
++
++  }
++#endif // !defined(REALLY_CLANG)
++
++  namespace test_inline_variables
++  {
++
++    template<class T> void f(T)
++    {}
++
++    template<class T> inline T g(T)
++    {
++      return T{};
++    }
++
++    template<> inline void f<>(int)
++    {}
++
++    template<> int g<>(int)
++    {
++      return 5;
++    }
++
++  }
++
++}  // namespace cxx17
++
++#endif  // __cplusplus <= 201402L
++
++]])
 diff --git a/spyview/Fl_Listbox.H b/spyview/Fl_Listbox.H
 index 35803fc..832792b 100644
 --- a/spyview/Fl_Listbox.H