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Diffstat (limited to 'src/m4/std-gnu11.m4')
| -rw-r--r-- | src/m4/std-gnu11.m4 | 829 |
1 files changed, 0 insertions, 829 deletions
diff --git a/src/m4/std-gnu11.m4 b/src/m4/std-gnu11.m4 deleted file mode 100644 index 7b1a042..0000000 --- a/src/m4/std-gnu11.m4 +++ /dev/null @@ -1,829 +0,0 @@ -# Prefer GNU C11 and C++11 to earlier versions. -*- coding: utf-8 -*- - -# This implementation is taken from GNU Autoconf lib/autoconf/c.m4 -# commit 017d5ddd82854911f0119691d91ea8a1438824d6 -# dated Sun Apr 3 13:57:17 2016 -0700 -# This implementation will be obsolete once we can assume Autoconf 2.70 -# or later is installed everywhere a Gnulib program might be developed. - -m4_version_prereq([2.70], [], [ - - -# Copyright (C) 2001-2021 Free Software Foundation, Inc. - -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation, either version 3 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program. If not, see <https://www.gnu.org/licenses/>. - -# Written by David MacKenzie, with help from -# Akim Demaille, Paul Eggert, -# François Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor, -# Roland McGrath, Noah Friedman, david d zuhn, and many others. - - -# AC_PROG_CC([COMPILER ...]) -# -------------------------- -# COMPILER ... is a space separated list of C compilers to search for. -# This just gives the user an opportunity to specify an alternative -# search list for the C compiler. -AC_DEFUN_ONCE([AC_PROG_CC], -[AC_LANG_PUSH(C)dnl -AC_ARG_VAR([CC], [C compiler command])dnl -AC_ARG_VAR([CFLAGS], [C compiler flags])dnl -_AC_ARG_VAR_LDFLAGS()dnl -_AC_ARG_VAR_LIBS()dnl -_AC_ARG_VAR_CPPFLAGS()dnl -m4_ifval([$1], - [AC_CHECK_TOOLS(CC, [$1])], -[AC_CHECK_TOOL(CC, gcc) -if test -z "$CC"; then - dnl Here we want: - dnl AC_CHECK_TOOL(CC, cc) - dnl but without the check for a tool without the prefix. - dnl Until the check is removed from there, copy the code: - if test -n "$ac_tool_prefix"; then - AC_CHECK_PROG(CC, [${ac_tool_prefix}cc], [${ac_tool_prefix}cc]) - fi -fi -if test -z "$CC"; then - AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc) -fi -if test -z "$CC"; then - AC_CHECK_TOOLS(CC, cl.exe) -fi -if test -z "$CC"; then - AC_CHECK_TOOL(CC, clang) -fi -]) - -test -z "$CC" && AC_MSG_FAILURE([no acceptable C compiler found in \$PATH]) - -# Provide some information about the compiler. -_AS_ECHO_LOG([checking for _AC_LANG compiler version]) -set X $ac_compile -ac_compiler=$[2] -for ac_option in --version -v -V -qversion -version; do - _AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD]) -done - -m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl -m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl -_AC_LANG_COMPILER_GNU -if test $ac_compiler_gnu = yes; then - GCC=yes -else - GCC= -fi -_AC_PROG_CC_G -dnl -dnl Set ac_prog_cc_stdc to the supported C version. -dnl Also set the documented variable ac_cv_prog_cc_stdc; -dnl its name was chosen when it was cached, but it is no longer cached. -_AC_PROG_CC_C11([ac_prog_cc_stdc=c11 - ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11], - [_AC_PROG_CC_C99([ac_prog_cc_stdc=c99 - ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99], - [_AC_PROG_CC_C89([ac_prog_cc_stdc=c89 - ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89], - [ac_prog_cc_stdc=no - ac_cv_prog_cc_stdc=no])])]) -dnl -AC_LANG_POP(C)dnl -])# AC_PROG_CC - - - -# AC_PROG_CXX([LIST-OF-COMPILERS]) -# -------------------------------- -# LIST-OF-COMPILERS is a space separated list of C++ compilers to search -# for (if not specified, a default list is used). 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((test) ? puts (#test) : printf (__VA_ARGS__)) -static void -test_varargs_macros (void) -{ - int x = 1234; - int y = 5678; - debug ("Flag"); - debug ("X = %d\n", x); - showlist (The first, second, and third items.); - report (x>y, "x is %d but y is %d", x, y); -} - -// Check long long types. -#define BIG64 18446744073709551615ull -#define BIG32 4294967295ul -#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0) -#if !BIG_OK - your preprocessor is broken; -#endif -#if BIG_OK -#else - your preprocessor is broken; -#endif -static long long int bignum = -9223372036854775807LL; -static unsigned long long int ubignum = BIG64; - -struct incomplete_array -{ - int datasize; - double data[]; -}; - -struct named_init { - int number; - const wchar_t *name; - double average; -}; - -typedef const char *ccp; - -static inline int -test_restrict (ccp restrict text) -{ - // See if C++-style comments work. - // Iterate through items via the restricted pointer. - // Also check for declarations in for loops. - for (unsigned int i = 0; *(text+i) != '\0'; ++i) - continue; - return 0; -} - -// Check varargs and va_copy. -static bool -test_varargs (const char *format, ...) -{ - va_list args; - va_start (args, format); - va_list args_copy; - va_copy (args_copy, args); - - const char *str = ""; - int number = 0; - float fnumber = 0; - - while (*format) - { - switch (*format++) - { - case 's': // string - str = va_arg (args_copy, const char *); - break; - case 'd': // int - number = va_arg (args_copy, int); - break; - case 'f': // float - fnumber = va_arg (args_copy, double); - break; - default: - break; - } - } - va_end (args_copy); - va_end (args); - - return *str && number && fnumber; -}]])# _AC_C_C99_TEST_HEADER - -# _AC_C_C99_TEST_BODY -# ------------------- -# A C body suitable for testing for C99, assuming the corresponding header. -AC_DEFUN([_AC_C_C99_TEST_BODY], -[[ - // Check bool. - _Bool success = false; - - // Check restrict. - if (test_restrict ("String literal") == 0) - success = true; - char *restrict newvar = "Another string"; - - // Check varargs. - success &= test_varargs ("s, d' f .", "string", 65, 34.234); - test_varargs_macros (); - - // Check flexible array members. - struct incomplete_array *ia = - malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10)); - ia->datasize = 10; - for (int i = 0; i < ia->datasize; ++i) - ia->data[i] = i * 1.234; - - // Check named initializers. - struct named_init ni = { - .number = 34, - .name = L"Test wide string", - .average = 543.34343, - }; - - ni.number = 58; - - int dynamic_array[ni.number]; - dynamic_array[ni.number - 1] = 543; - - // work around unused variable warnings - return (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == 'x' - || dynamic_array[ni.number - 1] != 543); -]]) - -# _AC_PROG_CC_C99 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE]) -# ---------------------------------------------------------------- -# If the C compiler is not in ISO C99 mode by default, try to add an -# option to output variable CC to make it so. This macro tries -# various options that select ISO C99 on some system or another. It -# considers the compiler to be in ISO C99 mode if it handles _Bool, -# // comments, flexible array members, inline, long long int, mixed -# code and declarations, named initialization of structs, restrict, -# va_copy, varargs macros, variable declarations in for loops and -# variable length arrays. -AC_DEFUN([_AC_PROG_CC_C99], -[_AC_C_STD_TRY([c99], -[_AC_C_C99_TEST_HEADER], -[_AC_C_C99_TEST_BODY], -dnl Try -dnl GCC -std=gnu99 (unused restrictive modes: -std=c99 -std=iso9899:1999) -dnl IBM XL C -qlanglvl=extc1x (V12.1; does not pass C11 test) -dnl IBM XL C -qlanglvl=extc99 -dnl (pre-V12.1; unused restrictive mode: -qlanglvl=stdc99) -dnl HP cc -AC99 -dnl Intel ICC -std=c99, -c99 (deprecated) -dnl IRIX -c99 -dnl Solaris -D_STDC_C99= -dnl cc's -xc99 option uses linker magic to define the external -dnl symbol __xpg4 as if by "int __xpg4 = 1;", which enables C99 -dnl behavior for C library functions. This is not wanted here, -dnl because it means that a single module compiled with -xc99 -dnl alters C runtime behavior for the entire program, not for -dnl just the module. Instead, define the (private) symbol -dnl _STDC_C99, which suppresses a bogus failure in <stdbool.h>. -dnl The resulting compiler passes the test case here, and that's -dnl good enough. For more, please see the thread starting at: -dnl https://lists.gnu.org/r/autoconf/2010-12/msg00059.html -dnl Tru64 -c99 -dnl with extended modes being tried first. -[[-std=gnu99 -std=c99 -c99 -AC99 -D_STDC_C99= -qlanglvl=extc1x -qlanglvl=extc99]], [$1], [$2])[]dnl -])# _AC_PROG_CC_C99 - - -# _AC_PROG_CC_C11 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE]) -# ---------------------------------------------------------------- -# If the C compiler is not in ISO C11 mode by default, try to add an -# option to output variable CC to make it so. This macro tries -# various options that select ISO C11 on some system or another. It -# considers the compiler to be in ISO C11 mode if it handles _Alignas, -# _Alignof, _Noreturn, _Static_assert, UTF-8 string literals, -# duplicate typedefs, and anonymous structures and unions. -AC_DEFUN([_AC_PROG_CC_C11], -[_AC_C_STD_TRY([c11], -[_AC_C_C99_TEST_HEADER[ -// Check _Alignas. -char _Alignas (double) aligned_as_double; -char _Alignas (0) no_special_alignment; -extern char aligned_as_int; -char _Alignas (0) _Alignas (int) aligned_as_int; - -// Check _Alignof. -enum -{ - int_alignment = _Alignof (int), - int_array_alignment = _Alignof (int[100]), - char_alignment = _Alignof (char) -}; -_Static_assert (0 < -_Alignof (int), "_Alignof is signed"); - -// Check _Noreturn. -int _Noreturn does_not_return (void) { for (;;) continue; } - -// Check _Static_assert. -struct test_static_assert -{ - int x; - _Static_assert (sizeof (int) <= sizeof (long int), - "_Static_assert does not work in struct"); - long int y; -}; - -// Check UTF-8 literals. -#define u8 syntax error! -char const utf8_literal[] = u8"happens to be ASCII" "another string"; - -// Check duplicate typedefs. -typedef long *long_ptr; -typedef long int *long_ptr; -typedef long_ptr long_ptr; - -// Anonymous structures and unions -- taken from C11 6.7.2.1 Example 1. -struct anonymous -{ - union { - struct { int i; int j; }; - struct { int k; long int l; } w; - }; - int m; -} v1; -]], -[_AC_C_C99_TEST_BODY[ - v1.i = 2; - v1.w.k = 5; - _Static_assert ((offsetof (struct anonymous, i) - == offsetof (struct anonymous, w.k)), - "Anonymous union alignment botch"); -]], -dnl Try -dnl GCC -std=gnu11 (unused restrictive mode: -std=c11) -dnl with extended modes being tried first. -dnl -dnl Do not try -qlanglvl=extc1x, because IBM XL C V12.1 (the latest version as -dnl of September 2012) does not pass the C11 test. For now, try extc1x when -dnl compiling the C99 test instead, since it enables _Static_assert and -dnl _Noreturn, which is a win. If -qlanglvl=extc11 or -qlanglvl=extc1x passes -dnl the C11 test in some future version of IBM XL C, we'll add it here, -dnl preferably extc11. -[[-std=gnu11]], [$1], [$2])[]dnl -])# _AC_PROG_CC_C11 - - -# AC_PROG_CC_C89 -# -------------- -# Do not use AU_ALIAS here and in AC_PROG_CC_C99 and AC_PROG_CC_STDC, -# as that'd be incompatible with how Automake redefines AC_PROG_CC. See -# <https://lists.gnu.org/r/autoconf/2012-10/msg00048.html>. -AU_DEFUN([AC_PROG_CC_C89], - [AC_REQUIRE([AC_PROG_CC])], - [$0 is obsolete; use AC_PROG_CC] -) - -# AC_PROG_CC_C99 -# -------------- -AU_DEFUN([AC_PROG_CC_C99], - [AC_REQUIRE([AC_PROG_CC])], - [$0 is obsolete; use AC_PROG_CC] -) - -# AC_PROG_CC_STDC -# --------------- -AU_DEFUN([AC_PROG_CC_STDC], - [AC_REQUIRE([AC_PROG_CC])], - [$0 is obsolete; use AC_PROG_CC] -) - - -# AC_C_PROTOTYPES -# --------------- -# Check if the C compiler supports prototypes, included if it needs -# options. -AC_DEFUN([AC_C_PROTOTYPES], -[AC_REQUIRE([AC_PROG_CC])dnl -if test "$ac_prog_cc_stdc" != no; then - AC_DEFINE(PROTOTYPES, 1, - [Define to 1 if the C compiler supports function prototypes.]) - AC_DEFINE(__PROTOTYPES, 1, - [Define like PROTOTYPES; this can be used by system headers.]) -fi -])# AC_C_PROTOTYPES - - -# _AC_CXX_STD_TRY(STANDARD, TEST-PROLOGUE, TEST-BODY, OPTION-LIST, -# ACTION-IF-AVAILABLE, ACTION-IF-UNAVAILABLE) -# ---------------------------------------------------------------- -# Check whether the C++ compiler accepts features of STANDARD (e.g -# `cxx98', `cxx11') by trying to compile a program of TEST-PROLOGUE -# and TEST-BODY. If this fails, try again with each compiler option -# in the space-separated OPTION-LIST; if one helps, append it to CXX. -# If eventually successful, run ACTION-IF-AVAILABLE, else -# ACTION-IF-UNAVAILABLE. -AC_DEFUN([_AC_CXX_STD_TRY], -[AC_MSG_CHECKING([for $CXX option to enable ]m4_translit(m4_translit($1, [x], [+]), [a-z], [A-Z])[ features]) -AC_LANG_PUSH(C++)dnl -AC_CACHE_VAL(ac_cv_prog_cxx_$1, -[ac_cv_prog_cxx_$1=no -ac_save_CXX=$CXX -AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$3])]) -for ac_arg in '' $4 -do - CXX="$ac_save_CXX $ac_arg" - _AC_COMPILE_IFELSE([], [ac_cv_prog_cxx_$1=$ac_arg]) - test "x$ac_cv_prog_cxx_$1" != "xno" && break -done -rm -f conftest.$ac_ext -CXX=$ac_save_CXX -])# AC_CACHE_VAL -ac_prog_cxx_stdcxx_options= -case "x$ac_cv_prog_cxx_$1" in - x) - AC_MSG_RESULT([none needed]) ;; - xno) - AC_MSG_RESULT([unsupported]) ;; - *) - ac_prog_cxx_stdcxx_options=" $ac_cv_prog_cxx_$1" - CXX=$CXX$ac_prog_cxx_stdcxx_options - AC_MSG_RESULT([$ac_cv_prog_cxx_$1]) ;; -esac -AC_LANG_POP(C++)dnl -AS_IF([test "x$ac_cv_prog_cxx_$1" != xno], [$5], [$6]) -])# _AC_CXX_STD_TRY - -# _AC_CXX_CXX98_TEST_HEADER -# ------------------------- -# A C++ header suitable for testing for CXX98. -AC_DEFUN([_AC_CXX_CXX98_TEST_HEADER], -[[ -#include <algorithm> -#include <cstdlib> -#include <fstream> -#include <iomanip> -#include <iostream> -#include <list> -#include <map> -#include <set> -#include <sstream> -#include <stdexcept> -#include <string> -#include <utility> -#include <vector> - -namespace test { - typedef std::vector<std::string> string_vec; - typedef std::pair<int,bool> map_value; - typedef std::map<std::string,map_value> map_type; - typedef std::set<int> set_type; - - template<typename T> - class printer { - public: - printer(std::ostringstream& os): os(os) {} - void operator() (T elem) { os << elem << std::endl; } - private: - std::ostringstream& os; - }; -} -]])# _AC_CXX_CXX98_TEST_HEADER - -# _AC_CXX_CXX98_TEST_BODY -# ----------------------- -# A C++ body suitable for testing for CXX98, assuming the corresponding header. -AC_DEFUN([_AC_CXX_CXX98_TEST_BODY], -[[ - -try { - // Basic string. - std::string teststr("ASCII text"); - teststr += " string"; - - // Simple vector. - test::string_vec testvec; - testvec.push_back(teststr); - testvec.push_back("foo"); - testvec.push_back("bar"); - if (testvec.size() != 3) { - throw std::runtime_error("vector size is not 1"); - } - - // Dump vector into stringstream and obtain string. - std::ostringstream os; - for (test::string_vec::const_iterator i = testvec.begin(); - i != testvec.end(); ++i) { - if (i + 1 != testvec.end()) { - os << teststr << '\n'; - } - } - // Check algorithms work. - std::for_each(testvec.begin(), testvec.end(), test::printer<std::string>(os)); - std::string os_out = os.str(); - - // Test pair and map. - test::map_type testmap; - testmap.insert(std::make_pair(std::string("key"), - std::make_pair(53,false))); - - // Test set. - int values[] = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1}; - test::set_type testset(values, values + sizeof(values)/sizeof(values[0])); - std::list<int> testlist(testset.begin(), testset.end()); - std::copy(testset.begin(), testset.end(), std::back_inserter(testlist)); -} catch (const std::exception& e) { - std::cerr << "Caught exception: " << e.what() << std::endl; - - // Test fstream - std::ofstream of("test.txt"); - of << "Test ASCII text\n" << std::flush; - of << "N= " << std::hex << std::setw(8) << std::left << 534 << std::endl; - of.close(); -} -std::exit(0); -]]) - -# _AC_CXX_CXX11_TEST_HEADER -# ------------------------- -# A C++ header suitable for testing for CXX11. -AC_DEFUN([_AC_CXX_CXX11_TEST_HEADER], -[[ -#include <deque> -#include <functional> -#include <memory> -#include <tuple> -#include <array> -#include <regex> -#include <iostream> - -namespace cxx11test -{ - typedef std::shared_ptr<std::string> sptr; - typedef std::weak_ptr<std::string> wptr; - - typedef std::tuple<std::string,int,double> tp; - typedef std::array<int, 20> int_array; - - constexpr int get_val() { return 20; } - - struct testinit - { - int i; - double d; - }; - - class delegate { - public: - delegate(int n) : n(n) {} - delegate(): delegate(2354) {} - - virtual int getval() { return this->n; }; - protected: - int n; - }; - - class overridden : public delegate { - public: - overridden(int n): delegate(n) {} - virtual int getval() override final { return this->n * 2; } - }; - - class nocopy { - public: - nocopy(int i): i(i) {} - nocopy() = default; - nocopy(const nocopy&) = delete; - nocopy & operator=(const nocopy&) = delete; - private: - int i; - }; -} -]])# _AC_CXX_CXX11_TEST_HEADER - -# _AC_CXX_CXX11_TEST_BODY -# ----------------------- -# A C++ body suitable for testing for CXX11, assuming the corresponding header. -AC_DEFUN([_AC_CXX_CXX11_TEST_BODY], -[[ -{ - // Test auto and decltype - std::deque<int> d; - d.push_front(43); - d.push_front(484); - d.push_front(3); - d.push_front(844); - int total = 0; - for (auto i = d.begin(); i != d.end(); ++i) { total += *i; } - - auto a1 = 6538; - auto a2 = 48573953.4; - auto a3 = "String literal"; - - decltype(a2) a4 = 34895.034; -} -{ - // Test constexpr - short sa[cxx11test::get_val()] = { 0 }; -} -{ - // Test initializer lists - cxx11test::testinit il = { 4323, 435234.23544 }; -} -{ - // Test range-based for and lambda - cxx11test::int_array array = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1}; - for (int &x : array) { x += 23; } - std::for_each(array.begin(), array.end(), [](int v1){ std::cout << v1; }); -} -{ - using cxx11test::sptr; - using cxx11test::wptr; - - sptr sp(new std::string("ASCII string")); - wptr wp(sp); - sptr sp2(wp); -} -{ - cxx11test::tp tuple("test", 54, 45.53434); - double d = std::get<2>(tuple); - std::string s; - int i; - std::tie(s,i,d) = tuple; -} -{ - static std::regex filename_regex("^_?([a-z0-9_.]+-)+[a-z0-9]+$"); - std::string testmatch("Test if this string matches"); - bool match = std::regex_search(testmatch, filename_regex); -} -{ - cxx11test::int_array array = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1}; - cxx11test::int_array::size_type size = array.size(); -} -{ - // Test constructor delegation - cxx11test::delegate d1; - cxx11test::delegate d2(); - cxx11test::delegate d3(45); -} -{ - // Test override and final - cxx11test::overridden o1(55464); -} -{ - // Test nullptr - char *c = nullptr; -} -{ - // Test template brackets - std::vector<std::pair<int,char*>> v1; -} -{ - // Unicode literals - char const *utf8 = u8"UTF-8 string \u2500"; - char16_t const *utf16 = u"UTF-8 string \u2500"; - char32_t const *utf32 = U"UTF-32 string \u2500"; -} -]]) - -# _AC_PROG_CXX_CXX98 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE]) -# ------------------------------------------------------------------- - -# If the C++ compiler is not in ISO C++98 mode by default, try to add -# an option to output variable CXX to make it so. This macro tries -# various options that select ISO C++98 on some system or another. It -# considers the compiler to be in ISO C++98 mode if it handles basic -# features of the std namespace including: string, containers (list, -# map, set, vector), streams (fstreams, iostreams, stringstreams, -# iomanip), pair, exceptions and algorithms. - - -AC_DEFUN([_AC_PROG_CXX_CXX98], -[_AC_CXX_STD_TRY([cxx98], -[_AC_CXX_CXX98_TEST_HEADER], -[_AC_CXX_CXX98_TEST_BODY], -dnl Try -dnl GCC -std=gnu++98 (unused restrictive mode: -std=c++98) -dnl IBM XL C -qlanglvl=extended -dnl HP aC++ -AA -dnl Intel ICC -std=gnu++98 -dnl Solaris N/A (default) -dnl Tru64 N/A (default, but -std gnu could be used) -dnl with extended modes being tried first. -[[-std=gnu++98 -std=c++98 -qlanglvl=extended -AA]], [$1], [$2])[]dnl -])# _AC_PROG_CXX_CXX98 - -# _AC_PROG_CXX_CXX11 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE]) -# ------------------------------------------------------------------- -# If the C++ compiler is not in ISO CXX11 mode by default, try to add -# an option to output variable CXX to make it so. This macro tries -# various options that select ISO C++11 on some system or another. It -# considers the compiler to be in ISO C++11 mode if it handles all the -# tests from the C++98 checks, plus the following: Language features -# (auto, constexpr, decltype, default/deleted constructors, delegate -# constructors, final, initializer lists, lambda functions, nullptr, -# override, range-based for loops, template brackets without spaces, -# unicode literals) and library features (array, memory (shared_ptr, -# weak_ptr), regex and tuple types). -AC_DEFUN([_AC_PROG_CXX_CXX11], -[_AC_CXX_STD_TRY([cxx11], -[_AC_CXX_CXX11_TEST_HEADER -_AC_CXX_CXX98_TEST_HEADER], -[_AC_CXX_CXX11_TEST_BODY -_AC_CXX_CXX98_TEST_BODY], -dnl Try -dnl GCC -std=gnu++11 (unused restrictive mode: -std=c++11) [and 0x variants] -dnl IBM XL C -qlanglvl=extended0x -dnl (pre-V12.1; unused restrictive mode: -qlanglvl=stdcxx11) -dnl HP aC++ -AA -dnl Intel ICC -std=c++11 -std=c++0x -dnl Solaris N/A (no support) -dnl Tru64 N/A (no support) -dnl with extended modes being tried first. -[[-std=gnu++11 -std=c++11 -std=gnu++0x -std=c++0x -qlanglvl=extended0x -AA]], [$1], [$2])[]dnl -])# _AC_PROG_CXX_CXX11 - - -])# m4_version_prereq |