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Gentoo's Bugzilla – Attachment 636910 Details for
Bug 721700
sys-auth/polkit-0.116-r1: add dev-lang/spidermonkey:68 (mozjs68) support
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[patch]
c++ 14 support
ensure_to_use_C++14.patch (text/plain), 21.06 KB, created by
Andrea Postiglione
on 2020-05-08 21:41:47 UTC
(
hide
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Description:
c++ 14 support
Filename:
MIME Type:
Creator:
Andrea Postiglione
Created:
2020-05-08 21:41:47 UTC
Size:
21.06 KB
patch
obsolete
>From cf22af32577cf49b4e5ed9945ec9cca862c45b3e Mon Sep 17 00:00:00 2001 >From: =?UTF-8?q?X=E2=84=B9=20Ruoyao?= <xry111@mengyan1223.wang> >Date: Fri, 3 Apr 2020 23:47:38 +0800 >Subject: [PATCH] ensure to use C++14 > >--- > buildutil/ax_cxx_compile_stdcxx.m4 | 948 +++++++++++++++++++++++++++++ > configure.ac | 3 +- > 2 files changed, 950 insertions(+), 1 deletion(-) > create mode 100644 buildutil/ax_cxx_compile_stdcxx.m4 > >diff --git a/buildutil/ax_cxx_compile_stdcxx.m4 b/buildutil/ax_cxx_compile_stdcxx.m4 >new file mode 100644 >index 0000000..9e9eaed >--- /dev/null >+++ b/buildutil/ax_cxx_compile_stdcxx.m4 >@@ -0,0 +1,948 @@ >+# =========================================================================== >+# 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, 2018 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 10 >+ >+dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro >+dnl (serial version number 13). >+ >+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 >+ >+ 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) >+]) >+ >+ >+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 < 201703L >+ >+#error "This is not a C++17 compiler" >+ >+#else >+ >+#include <initializer_list> >+#include <utility> >+#include <type_traits> >+ >+namespace cxx17 >+{ >+ >+ namespace test_constexpr_lambdas >+ { >+ >+ constexpr int foo = [](){return 42;}(); >+ >+ } >+ >+ 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; >+ } >+ } >+ >+ } >+ >+ namespace test_template_argument_deduction_for_class_templates >+ { >+ >+ 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}; >+ } >+ >+ } >+ >+ namespace test_non_type_auto_template_parameters >+ { >+ >+ template <auto n> >+ struct B >+ {}; >+ >+ B<5> b1; >+ B<'a'> b2; >+ >+ } >+ >+ namespace test_structured_bindings >+ { >+ >+ 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(); >+ >+ } >+ >+ namespace test_exception_spec_type_system >+ { >+ >+ 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))>); >+ >+ } >+ >+ 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 < 201703L >+ >+]]) >diff --git a/configure.ac b/configure.ac >index cd678f1..3d50641 100644 >--- a/configure.ac >+++ b/configure.ac >@@ -5,6 +5,7 @@ AC_INIT([polkit], [0.116], [http://lists.freedesktop.org/mailman/listinfo/polkit > AM_INIT_AUTOMAKE([]) > AC_CONFIG_HEADERS(config.h) > AC_CONFIG_MACRO_DIR([buildutil]) >+m4_include([buildutil/ax_cxx_compile_stdcxx.m4]) > AM_MAINTAINER_MODE > > m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) >@@ -33,7 +34,7 @@ AC_PROG_LN_S > AC_SYS_LARGEFILE > AM_PROG_CC_C_O > AC_PROG_CXX >-AX_CXX_COMPILE_STDCXX_11() >+AX_CXX_COMPILE_STDCXX([14], [], [mandatory]) > > # Taken from dbus > AC_ARG_ENABLE(ansi, [ --enable-ansi enable -ansi -pedantic gcc flags],enable_ansi=$enableval,enable_ansi=no) >-- >2.26.2 >
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