diff --git a/configure.ac b/configure.ac
index ff0acfd089f021008c16469d69bac9afbaa7243c..e34e1ecd0d2fc9323b38777f49439d1133b36bf3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@ AM_INIT_AUTOMAKE([1.11 -Wall -Wno-portability foreign no-dist-gzip dist-xz tar-p
AC_PROG_CC
AC_PROG_CXX
-AX_CXX_COMPILE_STDCXX_14
+AX_CXX_COMPILE_STDCXX_17
AC_CANONICAL_HOST
case ${host_os} in
diff --git a/license.txt b/license.txt
index 4d8a7bc5e5a8485affefd0ed5d9d5186c870812f..ea7593a47ae7bd3741a71b020d55e3fa5c4f38eb 100644
--- a/license.txt
+++ b/license.txt
@@ -27,14 +27,15 @@ Copyright: 2008-2009 Thomas Porschberg <thomas@randspringer.de>
License: FSFAP
Files: m4/ax_cxx_compile_stdcxx.m4
- m4/ax_cxx_compile_stdcxx_14.m4
+ m4/ax_cxx_compile_stdcxx_17.m4
Copyright: 2008 Benjamin Kosnik <bkoz@redhat.com>
2012 Zack Weinberg <zackw@panix.com>
2013 Roy Stogner <roystgnr@ices.utexas.edu>
2014, 2015 Google Inc.; contributed by Alexey Sokolov <sokolov@google.com>
2015 Paul Norman <penorman@mac.com>
2015 Moritz Klammler <moritz@klammler.eu>
- 2016 Krzesimir Nowak <qdlacz@gmail.com>
+ 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com>
+ 2019 Enji Cooper <yaneurabeya@gmail.com>
License: FSFAP
Files: m4/ax_latex_class.m4 m4/ax_tex_test.m4
diff --git a/m4/ax_cxx_compile_stdcxx.m4 b/m4/ax_cxx_compile_stdcxx.m4
index 5032bba8091d5d1074f4509b4c47b38a66389c6b..43087b2e6889ec6f8ebd2f8ba77f4a9a716f8ac2 100644
--- a/m4/ax_cxx_compile_stdcxx.m4
+++ b/m4/ax_cxx_compile_stdcxx.m4
@@ -33,19 +33,19 @@
# 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>
+# Copyright (c) 2016, 2018 Krzesimir Nowak <qdlacz@gmail.com>
+# Copyright (c) 2019 Enji Cooper <yaneurabeya@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
+#serial 11
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"],
@@ -61,14 +61,6 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
[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
@@ -139,7 +131,6 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
[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])])
])
@@ -199,11 +190,13 @@ namespace cxx11
struct Base
{
+ virtual ~Base() {}
virtual void f() {}
};
struct Derived : public Base
{
+ virtual ~Derived() override {}
virtual void f() override {}
};
@@ -587,20 +580,12 @@ m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[
#error "This is not a C++ compiler"
-#elif __cplusplus <= 201402L
+#elif __cplusplus < 201703L
#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>
@@ -608,16 +593,12 @@ m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_17], [[
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
{
@@ -852,12 +833,9 @@ namespace cxx17
}
-#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
{
@@ -876,7 +854,6 @@ namespace cxx17
}
}
-#endif // !defined(REALLY_CLANG)
namespace test_non_type_auto_template_parameters
{
@@ -890,12 +867,9 @@ namespace cxx17
}
-#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 };
@@ -927,14 +901,10 @@ namespace cxx17
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 {};
@@ -952,7 +922,6 @@ namespace cxx17
static_assert (std::is_same_v<Good, decltype(f(g1, g2))>);
}
-#endif // !defined(REALLY_CLANG)
namespace test_inline_variables
{
@@ -977,6 +946,6 @@ namespace cxx17
} // namespace cxx17
-#endif // __cplusplus <= 201402L
+#endif // __cplusplus < 201703L
]])
diff --git a/m4/ax_cxx_compile_stdcxx_14.m4 b/m4/ax_cxx_compile_stdcxx_17.m4
similarity index 80%
rename from m4/ax_cxx_compile_stdcxx_14.m4
rename to m4/ax_cxx_compile_stdcxx_17.m4
index 094db0d025cbb77b35abb3b017d1dcdef809efb5..a6834171739bed1a8974fe48999a9c91104cab34 100644
--- a/m4/ax_cxx_compile_stdcxx_14.m4
+++ b/m4/ax_cxx_compile_stdcxx_17.m4
@@ -1,19 +1,19 @@
# =============================================================================
-# https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_14.html
+# https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_17.html
# =============================================================================
#
# SYNOPSIS
#
-# AX_CXX_COMPILE_STDCXX_14([ext|noext], [mandatory|optional])
+# AX_CXX_COMPILE_STDCXX_17([ext|noext], [mandatory|optional])
#
# DESCRIPTION
#
-# Check for baseline language coverage in the compiler for the C++14
+# Check for baseline language coverage in the compiler for the C++17
# standard; if necessary, add switches to CXX and CXXCPP to enable
# support.
#
# This macro is a convenience alias for calling the AX_CXX_COMPILE_STDCXX
-# macro with the version set to C++14. The two optional arguments are
+# macro with the version set to C++17. The two optional arguments are
# forwarded literally as the second and third argument respectively.
# Please see the documentation for the AX_CXX_COMPILE_STDCXX macro for
# more information. If you want to use this macro, you also need to
@@ -22,13 +22,14 @@
# LICENSE
#
# 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 5
+#serial 2
AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX])
-AC_DEFUN([AX_CXX_COMPILE_STDCXX_14], [AX_CXX_COMPILE_STDCXX([14], [$1], [$2])])
+AC_DEFUN([AX_CXX_COMPILE_STDCXX_17], [AX_CXX_COMPILE_STDCXX([17], [$1], [$2])])