]> git.ipfire.org Git - thirdparty/snort3.git/commitdiff
Merge pull request #781 in SNORT/snort3 from macros to master
authorMichael Altizer (mialtize) <mialtize@cisco.com>
Thu, 19 Jan 2017 17:11:20 +0000 (12:11 -0500)
committerMichael Altizer (mialtize) <mialtize@cisco.com>
Thu, 19 Jan 2017 17:11:20 +0000 (12:11 -0500)
Squashed commit of the following:

commit ff0cba0a6121c1cf4d8e99f9dd3eb78ddfcd6827
Author: Michael Altizer <mialtize@cisco.com>
Date:   Wed Jan 18 21:45:22 2017 -0500

    build: Don't disable asserts when compiling with code coverage

commit b35985da20ac0dbe8dde56ef9fb6f3e3c35709b4
Author: Michael Altizer <mialtize@cisco.com>
Date:   Wed Jan 18 21:43:38 2017 -0500

    autoconf: Update to latest versions of autoconf-archive macros

cmake/configure_options.cmake
m4/ax_code_coverage.m4
m4/ax_cxx_compile_stdcxx.m4
m4/ax_cxx_compile_stdcxx_11.m4

index a78009690c2038373e4b2ddb22c7946519891530..81d5622a3082527117d708a28a183afb54c754ef 100644 (file)
@@ -121,7 +121,6 @@ if ( ENABLE_THREAD_SANITIZER )
 endif ( ENABLE_THREAD_SANITIZER )
 
 if ( ENABLE_CODE_COVERAGE )
-    set ( CMAKE_CPP_FLAGS "${CMAKE_CPP_FLAGS} -DNDEBUG" )
     set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O0 -g -fprofile-arcs -ftest-coverage" )
     set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0 -g -fprofile-arcs -ftest-coverage" )
 
index 93dfce3a0d735035ed27ba0b12bf96ce3810dab5..5793e4a0df9df3dffd2485d115bd68384a2bf625 100644 (file)
@@ -9,9 +9,9 @@
 # DESCRIPTION
 #
 #   Defines CODE_COVERAGE_CPPFLAGS, CODE_COVERAGE_CFLAGS,
-#   CODE_COVERAGE_CXXFLAGS and CODE_COVERAGE_LDFLAGS which should be
-#   included in the CPPFLAGS, CFLAGS CXXFLAGS and LIBS/LDFLAGS variables of
-#   every build target (program or library) which should be built with code
+#   CODE_COVERAGE_CXXFLAGS and CODE_COVERAGE_LIBS which should be included
+#   in the CPPFLAGS, CFLAGS CXXFLAGS and LIBS/LIBADD variables of every
+#   build target (program or library) which should be built with code
 #   coverage support. Also defines CODE_COVERAGE_RULES which should be
 #   substituted in your Makefile; and $enable_code_coverage which can be
 #   used in subsequent configure output. CODE_COVERAGE_ENABLED is defined
@@ -33,7 +33,7 @@
 #   Makefile.am:
 #
 #     @CODE_COVERAGE_RULES@
-#     my_program_LIBS = ... $(CODE_COVERAGE_LDFLAGS) ...
+#     my_program_LIBS = ... $(CODE_COVERAGE_LIBS) ...
 #     my_program_CPPFLAGS = ... $(CODE_COVERAGE_CPPFLAGS) ...
 #     my_program_CFLAGS = ... $(CODE_COVERAGE_CFLAGS) ...
 #     my_program_CXXFLAGS = ... $(CODE_COVERAGE_CXXFLAGS) ...
 #   (`make check`) and build a code coverage report detailing the code which
 #   was touched, then print the URI for the report.
 #
+#   In earlier versions of this macro, CODE_COVERAGE_LDFLAGS was defined
+#   instead of CODE_COVERAGE_LIBS. They are both still defined, but use of
+#   CODE_COVERAGE_LIBS is preferred for clarity; CODE_COVERAGE_LDFLAGS is
+#   deprecated. They have the same value.
+#
 #   This code was derived from Makefile.decl in GLib, originally licenced
 #   under LGPLv2.1+.
 #
@@ -70,7 +75,7 @@
 #   You should have received a copy of the GNU Lesser General Public License
 #   along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-#serial 16
+#serial 20
 
 AC_DEFUN([AX_CODE_COVERAGE],[
        dnl Check for --enable-code-coverage
@@ -106,49 +111,58 @@ AC_DEFUN([AX_CODE_COVERAGE],[
                        AC_MSG_ERROR([not compiling with gcc, which is required for gcov code coverage])
                ])
 
-               # List of supported lcov versions.
-               lcov_version_list="1.6 1.7 1.8 1.9 1.10 1.11 1.12"
-
                AC_CHECK_PROG([LCOV], [lcov], [lcov])
                AC_CHECK_PROG([GENHTML], [genhtml], [genhtml])
 
-               AS_IF([ test "$LCOV" ], [
-                       AC_CACHE_CHECK([for lcov version], ax_cv_lcov_version, [
-                               ax_cv_lcov_version=invalid
-                               lcov_version=`$LCOV -v 2>/dev/null | $SED -e 's/^.* //'`
-                               for lcov_check_version in $lcov_version_list; do
-                                       if test "$lcov_version" = "$lcov_check_version"; then
-                                               ax_cv_lcov_version="$lcov_check_version (ok)"
-                                       fi
-                               done
-                       ])
-               ], [
-                       lcov_msg="To enable code coverage reporting you must have one of the following lcov versions installed: $lcov_version_list"
-                       AC_MSG_ERROR([$lcov_msg])
+               AS_IF([ test -z "$LCOV" ], [
+                       AC_MSG_ERROR([To enable code coverage reporting you must have lcov installed])
                ])
 
-               case $ax_cv_lcov_version in
-                       ""|invalid[)]
-                               lcov_msg="You must have one of the following versions of lcov: $lcov_version_list (found: $lcov_version)."
-                               AC_MSG_ERROR([$lcov_msg])
-                               LCOV="exit 0;"
-                       ;;
-               esac
-
                AS_IF([ test -z "$GENHTML" ], [
                        AC_MSG_ERROR([Could not find genhtml from the lcov package])
                ])
 
                dnl Build the code coverage flags
-               CODE_COVERAGE_CPPFLAGS="-DNDEBUG"
+               dnl Define CODE_COVERAGE_LDFLAGS for backwards compatibility
+               dnl Snort++ - removing -DNDEBUG from CODE_COVERAGE_CPPFLAGS for now
+               dnl CODE_COVERAGE_CPPFLAGS="-DNDEBUG"
+               CODE_COVERAGE_CPPFLAGS=""
                CODE_COVERAGE_CFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"
                CODE_COVERAGE_CXXFLAGS="-O0 -g -fprofile-arcs -ftest-coverage"
-               CODE_COVERAGE_LDFLAGS="-lgcov"
+               CODE_COVERAGE_LIBS="-lgcov"
+               CODE_COVERAGE_LDFLAGS="$CODE_COVERAGE_LIBS"
 
                AC_SUBST([CODE_COVERAGE_CPPFLAGS])
                AC_SUBST([CODE_COVERAGE_CFLAGS])
                AC_SUBST([CODE_COVERAGE_CXXFLAGS])
+               AC_SUBST([CODE_COVERAGE_LIBS])
                AC_SUBST([CODE_COVERAGE_LDFLAGS])
+
+               [CODE_COVERAGE_RULES_CHECK='
+       -$(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) -k check
+       $(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) code-coverage-capture
+']
+               [CODE_COVERAGE_RULES_CAPTURE='
+       $(code_coverage_v_lcov_cap)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --capture --output-file "$(CODE_COVERAGE_OUTPUT_FILE).tmp" --test-name "$(call code_coverage_sanitize,$(PACKAGE_NAME)-$(PACKAGE_VERSION))" --no-checksum --compat-libtool $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_OPTIONS)
+       $(code_coverage_v_lcov_ign)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --remove "$(CODE_COVERAGE_OUTPUT_FILE).tmp" "/tmp/*" $(CODE_COVERAGE_IGNORE_PATTERN) --output-file "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_RMOPTS)
+       -@rm -f $(CODE_COVERAGE_OUTPUT_FILE).tmp
+       $(code_coverage_v_genhtml)LANG=C $(GENHTML) $(code_coverage_quiet) $(addprefix --prefix ,$(CODE_COVERAGE_DIRECTORY)) --output-directory "$(CODE_COVERAGE_OUTPUT_DIRECTORY)" --title "$(PACKAGE_NAME)-$(PACKAGE_VERSION) Code Coverage" --legend --show-details "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_GENHTML_OPTIONS)
+       @echo "file://$(abs_builddir)/$(CODE_COVERAGE_OUTPUT_DIRECTORY)/index.html"
+']
+               [CODE_COVERAGE_RULES_CLEAN='
+clean: code-coverage-clean
+distclean: code-coverage-clean
+code-coverage-clean:
+       -$(LCOV) --directory $(top_builddir) -z
+       -rm -rf $(CODE_COVERAGE_OUTPUT_FILE) $(CODE_COVERAGE_OUTPUT_FILE).tmp $(CODE_COVERAGE_OUTPUT_DIRECTORY)
+       -find . \( -name "*.gcda" -o -name "*.gcno" -o -name "*.gcov" \) -delete
+']
+       ], [
+               [CODE_COVERAGE_RULES_CHECK='
+       @echo "Need to reconfigure with --enable-code-coverage"
+']
+               CODE_COVERAGE_RULES_CAPTURE="$CODE_COVERAGE_RULES_CHECK"
+               CODE_COVERAGE_RULES_CLEAN=''
        ])
 
 [CODE_COVERAGE_RULES='
@@ -228,37 +242,15 @@ code_coverage_quiet_0 = --quiet
 code_coverage_sanitize = $(subst -,_,$(subst .,_,$(1)))
 
 # Use recursive makes in order to ignore errors during check
-check-code-coverage:
-ifeq ($(CODE_COVERAGE_ENABLED),yes)
-       -$(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) -k check
-       $(A''M_V_at)$(MAKE) $(AM_MAKEFLAGS) code-coverage-capture
-else
-       @echo "Need to reconfigure with --enable-code-coverage"
-endif
+check-code-coverage:'"$CODE_COVERAGE_RULES_CHECK"'
 
 # Capture code coverage data
-code-coverage-capture: code-coverage-capture-hook
-ifeq ($(CODE_COVERAGE_ENABLED),yes)
-       $(code_coverage_v_lcov_cap)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --capture --output-file "$(CODE_COVERAGE_OUTPUT_FILE).tmp" --test-name "$(call code_coverage_sanitize,$(PACKAGE_NAME)-$(PACKAGE_VERSION))" --no-checksum --compat-libtool $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_OPTIONS)
-       $(code_coverage_v_lcov_ign)$(LCOV) $(code_coverage_quiet) $(addprefix --directory ,$(CODE_COVERAGE_DIRECTORY)) --remove "$(CODE_COVERAGE_OUTPUT_FILE).tmp" "/tmp/*" $(CODE_COVERAGE_IGNORE_PATTERN) --output-file "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_LCOV_SHOPTS) $(CODE_COVERAGE_LCOV_RMOPTS)
-       -@rm -f $(CODE_COVERAGE_OUTPUT_FILE).tmp
-       $(code_coverage_v_genhtml)LANG=C $(GENHTML) $(code_coverage_quiet) $(addprefix --prefix ,$(CODE_COVERAGE_DIRECTORY)) --output-directory "$(CODE_COVERAGE_OUTPUT_DIRECTORY)" --title "$(PACKAGE_NAME)-$(PACKAGE_VERSION) Code Coverage" --legend --show-details "$(CODE_COVERAGE_OUTPUT_FILE)" $(CODE_COVERAGE_GENHTML_OPTIONS)
-       @echo "file://$(abs_builddir)/$(CODE_COVERAGE_OUTPUT_DIRECTORY)/index.html"
-else
-       @echo "Need to reconfigure with --enable-code-coverage"
-endif
+code-coverage-capture: code-coverage-capture-hook'"$CODE_COVERAGE_RULES_CAPTURE"'
 
 # Hook rule executed before code-coverage-capture, overridable by the user
 code-coverage-capture-hook:
 
-ifeq ($(CODE_COVERAGE_ENABLED),yes)
-clean: code-coverage-clean
-distclean: code-coverage-clean
-code-coverage-clean:
-       -$(LCOV) --directory $(top_builddir) -z
-       -rm -rf $(CODE_COVERAGE_OUTPUT_FILE) $(CODE_COVERAGE_OUTPUT_FILE).tmp $(CODE_COVERAGE_OUTPUT_DIRECTORY)
-       -find . \( -name "*.gcda" -o -name "*.gcno" -o -name "*.gcov" \) -delete
-endif
+'"$CODE_COVERAGE_RULES_CLEAN"'
 
 GITIGNOREFILES ?=
 GITIGNOREFILES += $(CODE_COVERAGE_OUTPUT_FILE) $(CODE_COVERAGE_OUTPUT_DIRECTORY)
index 2c18e49c56c0bc732a4bd6534ae03f871d42c6db..b61fcb6314a3b569c94de08f64cd705447defdde 100644 (file)
 #   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 4
+#serial 6
 
 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], [],
-        [$1], [14], [],
-        [$1], [17], [m4_fatal([support for C++17 not yet implemented in AX_CXX_COMPILE_STDCXX])],
+  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], [],
@@ -70,7 +72,8 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
 
   m4_if([$2], [noext], [], [dnl
   if test x$ac_success = xno; then
-    for switch in -std=gnu++$1 -std=gnu++0x; do
+    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,
@@ -96,22 +99,27 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl
     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 switch in -std=c++$1 -std=c++0x +std=c++$1 "-h std=c++$1"; 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"
+    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 $switch"
+          fi
+          ac_success=yes
+          break
         fi
-        ac_success=yes
+      done
+      if test x$ac_success = xyes; then
         break
       fi
     done
@@ -131,6 +139,7 @@ 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])])
 ])
 
 
@@ -148,6 +157,11 @@ m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14],
   _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
 
@@ -518,7 +532,7 @@ namespace cxx14
 
   }
 
-  namespace test_digit_seperators
+  namespace test_digit_separators
   {
 
     constexpr auto ten_million = 100'000'000;
@@ -560,3 +574,409 @@ 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
+
+]])
index 3dd5cf9111e2079e19dbfedd96868fe43a5e2426..0aadeafe78eb04122e73e9d9fd69e534f15fdbf5 100644 (file)
@@ -33,8 +33,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 16
-
-include([ax_cxx_compile_stdcxx.m4])
+#serial 17
 
+AX_REQUIRE_DEFINED([AX_CXX_COMPILE_STDCXX])
 AC_DEFUN([AX_CXX_COMPILE_STDCXX_11], [AX_CXX_COMPILE_STDCXX([11], [$1], [$2])])