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authorAndreas Baumann <mail@andreasbaumann.cc>2023-02-11 06:20:24 (GMT)
committerAndreas Baumann <mail@andreasbaumann.cc>2023-02-11 06:20:24 (GMT)
commitf867d7b44080fa9716deeff4476275f9a489879f (patch)
treebc964662fc3300dc626fb6d833d8ed5c8f46eca7 /gl/m4/std-gnu11.m4
parent9734c439cba0a02b087e50789e94ec9b07754608 (diff)
parentc07206f2ccc2356aa74bc6813a94c2190017d44e (diff)
downloadmonitoring-plugins-f867d7b44080fa9716deeff4476275f9a489879f.tar.gz
Merge branch 'master' into curlfixes
Diffstat (limited to 'gl/m4/std-gnu11.m4')
-rw-r--r--gl/m4/std-gnu11.m4829
1 files changed, 829 insertions, 0 deletions
diff --git a/gl/m4/std-gnu11.m4 b/gl/m4/std-gnu11.m4
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1# Prefer GNU C11 and C++11 to earlier versions. -*- coding: utf-8 -*-
2
3# This implementation is taken from GNU Autoconf lib/autoconf/c.m4
4# commit 017d5ddd82854911f0119691d91ea8a1438824d6
5# dated Sun Apr 3 13:57:17 2016 -0700
6# This implementation will be obsolete once we can assume Autoconf 2.70
7# or later is installed everywhere a Gnulib program might be developed.
8
9m4_version_prereq([2.70], [], [
10
11
12# Copyright (C) 2001-2023 Free Software Foundation, Inc.
13
14# This program is free software; you can redistribute it and/or modify
15# it under the terms of the GNU General Public License as published by
16# the Free Software Foundation, either version 3 of the License, or
17# (at your option) any later version.
18#
19# This program is distributed in the hope that it will be useful,
20# but WITHOUT ANY WARRANTY; without even the implied warranty of
21# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22# GNU General Public License for more details.
23#
24# You should have received a copy of the GNU General Public License
25# along with this program. If not, see <https://www.gnu.org/licenses/>.
26
27# Written by David MacKenzie, with help from
28# Akim Demaille, Paul Eggert,
29# François Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
30# Roland McGrath, Noah Friedman, david d zuhn, and many others.
31
32
33# AC_PROG_CC([COMPILER ...])
34# --------------------------
35# COMPILER ... is a space separated list of C compilers to search for.
36# This just gives the user an opportunity to specify an alternative
37# search list for the C compiler.
38AC_DEFUN_ONCE([AC_PROG_CC],
39[AC_LANG_PUSH(C)dnl
40AC_ARG_VAR([CC], [C compiler command])dnl
41AC_ARG_VAR([CFLAGS], [C compiler flags])dnl
42_AC_ARG_VAR_LDFLAGS()dnl
43_AC_ARG_VAR_LIBS()dnl
44_AC_ARG_VAR_CPPFLAGS()dnl
45m4_ifval([$1],
46 [AC_CHECK_TOOLS(CC, [$1])],
47[AC_CHECK_TOOL(CC, gcc)
48if test -z "$CC"; then
49 dnl Here we want:
50 dnl AC_CHECK_TOOL(CC, cc)
51 dnl but without the check for a tool without the prefix.
52 dnl Until the check is removed from there, copy the code:
53 if test -n "$ac_tool_prefix"; then
54 AC_CHECK_PROG(CC, [${ac_tool_prefix}cc], [${ac_tool_prefix}cc])
55 fi
56fi
57if test -z "$CC"; then
58 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
59fi
60if test -z "$CC"; then
61 AC_CHECK_TOOLS(CC, cl.exe)
62fi
63if test -z "$CC"; then
64 AC_CHECK_TOOL(CC, clang)
65fi
66])
67
68test -z "$CC" && AC_MSG_FAILURE([no acceptable C compiler found in \$PATH])
69
70# Provide some information about the compiler.
71_AS_ECHO_LOG([checking for _AC_LANG compiler version])
72set X $ac_compile
73ac_compiler=$[2]
74for ac_option in --version -v -V -qversion -version; do
75 _AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
76done
77
78m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
79m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
80_AC_LANG_COMPILER_GNU
81if test $ac_compiler_gnu = yes; then
82 GCC=yes
83else
84 GCC=
85fi
86_AC_PROG_CC_G
87dnl
88dnl Set ac_prog_cc_stdc to the supported C version.
89dnl Also set the documented variable ac_cv_prog_cc_stdc;
90dnl its name was chosen when it was cached, but it is no longer cached.
91_AC_PROG_CC_C11([ac_prog_cc_stdc=c11
92 ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11],
93 [_AC_PROG_CC_C99([ac_prog_cc_stdc=c99
94 ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99],
95 [_AC_PROG_CC_C89([ac_prog_cc_stdc=c89
96 ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89],
97 [ac_prog_cc_stdc=no
98 ac_cv_prog_cc_stdc=no])])])
99dnl
100AC_LANG_POP(C)dnl
101])# AC_PROG_CC
102
103
104
105# AC_PROG_CXX([LIST-OF-COMPILERS])
106# --------------------------------
107# LIST-OF-COMPILERS is a space separated list of C++ compilers to search
108# for (if not specified, a default list is used). This just gives the
109# user an opportunity to specify an alternative search list for the C++
110# compiler.
111# aCC HP-UX C++ compiler much better than `CC', so test before.
112# FCC Fujitsu C++ compiler
113# KCC KAI C++ compiler
114# RCC Rational C++
115# xlC_r AIX C Set++ (with support for reentrant code)
116# xlC AIX C Set++
117AC_DEFUN([AC_PROG_CXX],
118[AC_LANG_PUSH(C++)dnl
119AC_ARG_VAR([CXX], [C++ compiler command])dnl
120AC_ARG_VAR([CXXFLAGS], [C++ compiler flags])dnl
121_AC_ARG_VAR_LDFLAGS()dnl
122_AC_ARG_VAR_LIBS()dnl
123_AC_ARG_VAR_CPPFLAGS()dnl
124_AC_ARG_VAR_PRECIOUS([CCC])dnl
125if test -z "$CXX"; then
126 if test -n "$CCC"; then
127 CXX=$CCC
128 else
129 AC_CHECK_TOOLS(CXX,
130 [m4_default([$1],
131 [g++ c++ gpp aCC CC cxx cc++ cl.exe FCC KCC RCC xlC_r xlC clang++])],
132 g++)
133 fi
134fi
135# Provide some information about the compiler.
136_AS_ECHO_LOG([checking for _AC_LANG compiler version])
137set X $ac_compile
138ac_compiler=$[2]
139for ac_option in --version -v -V -qversion; do
140 _AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
141done
142
143m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
144m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
145_AC_LANG_COMPILER_GNU
146if test $ac_compiler_gnu = yes; then
147 GXX=yes
148else
149 GXX=
150fi
151_AC_PROG_CXX_G
152_AC_PROG_CXX_CXX11([ac_prog_cxx_stdcxx=cxx11
153 ac_cv_prog_cxx_stdcxx=$ac_cv_prog_cxx_cxx11
154 ac_cv_prog_cxx_cxx98=$ac_cv_prog_cxx_cxx11],
155 [_AC_PROG_CXX_CXX98([ac_prog_cxx_stdcxx=cxx98
156 ac_cv_prog_cxx_stdcxx=$ac_cv_prog_cxx_cxx98],
157 [ac_prog_cxx_stdcxx=no
158 ac_cv_prog_cxx_stdcxx=no])])
159AC_LANG_POP(C++)dnl
160])# AC_PROG_CXX
161
162
163# _AC_C_STD_TRY(STANDARD, TEST-PROLOGUE, TEST-BODY, OPTION-LIST,
164# ACTION-IF-AVAILABLE, ACTION-IF-UNAVAILABLE)
165# --------------------------------------------------------------
166# Check whether the C compiler accepts features of STANDARD (e.g `c89', `c99')
167# by trying to compile a program of TEST-PROLOGUE and TEST-BODY. If this fails,
168# try again with each compiler option in the space-separated OPTION-LIST; if one
169# helps, append it to CC. If eventually successful, run ACTION-IF-AVAILABLE,
170# else ACTION-IF-UNAVAILABLE.
171AC_DEFUN([_AC_C_STD_TRY],
172[AC_MSG_CHECKING([for $CC option to enable ]m4_translit($1, [c], [C])[ features])
173AC_CACHE_VAL(ac_cv_prog_cc_$1,
174[ac_cv_prog_cc_$1=no
175ac_save_CC=$CC
176AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$3])])
177for ac_arg in '' $4
178do
179 CC="$ac_save_CC $ac_arg"
180 _AC_COMPILE_IFELSE([], [ac_cv_prog_cc_$1=$ac_arg])
181 test "x$ac_cv_prog_cc_$1" != "xno" && break
182done
183rm -f conftest.$ac_ext
184CC=$ac_save_CC
185])# AC_CACHE_VAL
186ac_prog_cc_stdc_options=
187case "x$ac_cv_prog_cc_$1" in
188 x)
189 AC_MSG_RESULT([none needed]) ;;
190 xno)
191 AC_MSG_RESULT([unsupported]) ;;
192 *)
193 ac_prog_cc_stdc_options=" $ac_cv_prog_cc_$1"
194 CC=$CC$ac_prog_cc_stdc_options
195 AC_MSG_RESULT([$ac_cv_prog_cc_$1]) ;;
196esac
197AS_IF([test "x$ac_cv_prog_cc_$1" != xno], [$5], [$6])
198])# _AC_C_STD_TRY
199
200# _AC_C_C99_TEST_HEADER
201# ---------------------
202# A C header suitable for testing for C99.
203AC_DEFUN([_AC_C_C99_TEST_HEADER],
204[[#include <stdarg.h>
205#include <stdbool.h>
206#include <stddef.h>
207#include <stdlib.h>
208#include <wchar.h>
209#include <stdio.h>
210
211// Check varargs macros. These examples are taken from C99 6.10.3.5.
212#define debug(...) fprintf (stderr, __VA_ARGS__)
213#define showlist(...) puts (#__VA_ARGS__)
214#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
215static void
216test_varargs_macros (void)
217{
218 int x = 1234;
219 int y = 5678;
220 debug ("Flag");
221 debug ("X = %d\n", x);
222 showlist (The first, second, and third items.);
223 report (x>y, "x is %d but y is %d", x, y);
224}
225
226// Check long long types.
227#define BIG64 18446744073709551615ull
228#define BIG32 4294967295ul
229#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
230#if !BIG_OK
231 your preprocessor is broken;
232#endif
233#if BIG_OK
234#else
235 your preprocessor is broken;
236#endif
237static long long int bignum = -9223372036854775807LL;
238static unsigned long long int ubignum = BIG64;
239
240struct incomplete_array
241{
242 int datasize;
243 double data[];
244};
245
246struct named_init {
247 int number;
248 const wchar_t *name;
249 double average;
250};
251
252typedef const char *ccp;
253
254static inline int
255test_restrict (ccp restrict text)
256{
257 // See if C++-style comments work.
258 // Iterate through items via the restricted pointer.
259 // Also check for declarations in for loops.
260 for (unsigned int i = 0; *(text+i) != '\0'; ++i)
261 continue;
262 return 0;
263}
264
265// Check varargs and va_copy.
266static bool
267test_varargs (const char *format, ...)
268{
269 va_list args;
270 va_start (args, format);
271 va_list args_copy;
272 va_copy (args_copy, args);
273
274 const char *str = "";
275 int number = 0;
276 float fnumber = 0;
277
278 while (*format)
279 {
280 switch (*format++)
281 {
282 case 's': // string
283 str = va_arg (args_copy, const char *);
284 break;
285 case 'd': // int
286 number = va_arg (args_copy, int);
287 break;
288 case 'f': // float
289 fnumber = va_arg (args_copy, double);
290 break;
291 default:
292 break;
293 }
294 }
295 va_end (args_copy);
296 va_end (args);
297
298 return *str && number && fnumber;
299}]])# _AC_C_C99_TEST_HEADER
300
301# _AC_C_C99_TEST_BODY
302# -------------------
303# A C body suitable for testing for C99, assuming the corresponding header.
304AC_DEFUN([_AC_C_C99_TEST_BODY],
305[[
306 // Check bool.
307 _Bool success = false;
308
309 // Check restrict.
310 if (test_restrict ("String literal") == 0)
311 success = true;
312 char *restrict newvar = "Another string";
313
314 // Check varargs.
315 success &= test_varargs ("s, d' f .", "string", 65, 34.234);
316 test_varargs_macros ();
317
318 // Check flexible array members.
319 struct incomplete_array *ia =
320 malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
321 ia->datasize = 10;
322 for (int i = 0; i < ia->datasize; ++i)
323 ia->data[i] = i * 1.234;
324
325 // Check named initializers.
326 struct named_init ni = {
327 .number = 34,
328 .name = L"Test wide string",
329 .average = 543.34343,
330 };
331
332 ni.number = 58;
333
334 int dynamic_array[ni.number];
335 dynamic_array[ni.number - 1] = 543;
336
337 // work around unused variable warnings
338 return (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == 'x'
339 || dynamic_array[ni.number - 1] != 543);
340]])
341
342# _AC_PROG_CC_C99 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
343# ----------------------------------------------------------------
344# If the C compiler is not in ISO C99 mode by default, try to add an
345# option to output variable CC to make it so. This macro tries
346# various options that select ISO C99 on some system or another. It
347# considers the compiler to be in ISO C99 mode if it handles _Bool,
348# // comments, flexible array members, inline, long long int, mixed
349# code and declarations, named initialization of structs, restrict,
350# va_copy, varargs macros, variable declarations in for loops and
351# variable length arrays.
352AC_DEFUN([_AC_PROG_CC_C99],
353[_AC_C_STD_TRY([c99],
354[_AC_C_C99_TEST_HEADER],
355[_AC_C_C99_TEST_BODY],
356dnl Try
357dnl GCC -std=gnu99 (unused restrictive modes: -std=c99 -std=iso9899:1999)
358dnl IBM XL C -qlanglvl=extc1x (V12.1; does not pass C11 test)
359dnl IBM XL C -qlanglvl=extc99
360dnl (pre-V12.1; unused restrictive mode: -qlanglvl=stdc99)
361dnl HP cc -AC99
362dnl Intel ICC -std=c99, -c99 (deprecated)
363dnl IRIX -c99
364dnl Solaris -D_STDC_C99=
365dnl cc's -xc99 option uses linker magic to define the external
366dnl symbol __xpg4 as if by "int __xpg4 = 1;", which enables C99
367dnl behavior for C library functions. This is not wanted here,
368dnl because it means that a single module compiled with -xc99
369dnl alters C runtime behavior for the entire program, not for
370dnl just the module. Instead, define the (private) symbol
371dnl _STDC_C99, which suppresses a bogus failure in <stdbool.h>.
372dnl The resulting compiler passes the test case here, and that's
373dnl good enough. For more, please see the thread starting at:
374dnl https://lists.gnu.org/r/autoconf/2010-12/msg00059.html
375dnl Tru64 -c99
376dnl with extended modes being tried first.
377[[-std=gnu99 -std=c99 -c99 -AC99 -D_STDC_C99= -qlanglvl=extc1x -qlanglvl=extc99]], [$1], [$2])[]dnl
378])# _AC_PROG_CC_C99
379
380
381# _AC_PROG_CC_C11 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
382# ----------------------------------------------------------------
383# If the C compiler is not in ISO C11 mode by default, try to add an
384# option to output variable CC to make it so. This macro tries
385# various options that select ISO C11 on some system or another. It
386# considers the compiler to be in ISO C11 mode if it handles _Alignas,
387# _Alignof, _Noreturn, _Static_assert, UTF-8 string literals,
388# duplicate typedefs, and anonymous structures and unions.
389AC_DEFUN([_AC_PROG_CC_C11],
390[_AC_C_STD_TRY([c11],
391[_AC_C_C99_TEST_HEADER[
392// Check _Alignas.
393char _Alignas (double) aligned_as_double;
394char _Alignas (0) no_special_alignment;
395extern char aligned_as_int;
396char _Alignas (0) _Alignas (int) aligned_as_int;
397
398// Check _Alignof.
399enum
400{
401 int_alignment = _Alignof (int),
402 int_array_alignment = _Alignof (int[100]),
403 char_alignment = _Alignof (char)
404};
405_Static_assert (0 < -_Alignof (int), "_Alignof is signed");
406
407// Check _Noreturn.
408int _Noreturn does_not_return (void) { for (;;) continue; }
409
410// Check _Static_assert.
411struct test_static_assert
412{
413 int x;
414 _Static_assert (sizeof (int) <= sizeof (long int),
415 "_Static_assert does not work in struct");
416 long int y;
417};
418
419// Check UTF-8 literals.
420#define u8 syntax error!
421char const utf8_literal[] = u8"happens to be ASCII" "another string";
422
423// Check duplicate typedefs.
424typedef long *long_ptr;
425typedef long int *long_ptr;
426typedef long_ptr long_ptr;
427
428// Anonymous structures and unions -- taken from C11 6.7.2.1 Example 1.
429struct anonymous
430{
431 union {
432 struct { int i; int j; };
433 struct { int k; long int l; } w;
434 };
435 int m;
436} v1;
437]],
438[_AC_C_C99_TEST_BODY[
439 v1.i = 2;
440 v1.w.k = 5;
441 _Static_assert ((offsetof (struct anonymous, i)
442 == offsetof (struct anonymous, w.k)),
443 "Anonymous union alignment botch");
444]],
445dnl Try
446dnl GCC -std=gnu11 (unused restrictive mode: -std=c11)
447dnl with extended modes being tried first.
448dnl
449dnl Do not try -qlanglvl=extc1x, because IBM XL C V12.1 (the latest version as
450dnl of September 2012) does not pass the C11 test. For now, try extc1x when
451dnl compiling the C99 test instead, since it enables _Static_assert and
452dnl _Noreturn, which is a win. If -qlanglvl=extc11 or -qlanglvl=extc1x passes
453dnl the C11 test in some future version of IBM XL C, we'll add it here,
454dnl preferably extc11.
455[[-std=gnu11]], [$1], [$2])[]dnl
456])# _AC_PROG_CC_C11
457
458
459# AC_PROG_CC_C89
460# --------------
461# Do not use AU_ALIAS here and in AC_PROG_CC_C99 and AC_PROG_CC_STDC,
462# as that'd be incompatible with how Automake redefines AC_PROG_CC. See
463# <https://lists.gnu.org/r/autoconf/2012-10/msg00048.html>.
464AU_DEFUN([AC_PROG_CC_C89],
465 [AC_REQUIRE([AC_PROG_CC])],
466 [$0 is obsolete; use AC_PROG_CC]
467)
468
469# AC_PROG_CC_C99
470# --------------
471AU_DEFUN([AC_PROG_CC_C99],
472 [AC_REQUIRE([AC_PROG_CC])],
473 [$0 is obsolete; use AC_PROG_CC]
474)
475
476# AC_PROG_CC_STDC
477# ---------------
478AU_DEFUN([AC_PROG_CC_STDC],
479 [AC_REQUIRE([AC_PROG_CC])],
480 [$0 is obsolete; use AC_PROG_CC]
481)
482
483
484# AC_C_PROTOTYPES
485# ---------------
486# Check if the C compiler supports prototypes, included if it needs
487# options.
488AC_DEFUN([AC_C_PROTOTYPES],
489[AC_REQUIRE([AC_PROG_CC])dnl
490if test "$ac_prog_cc_stdc" != no; then
491 AC_DEFINE(PROTOTYPES, 1,
492 [Define to 1 if the C compiler supports function prototypes.])
493 AC_DEFINE(__PROTOTYPES, 1,
494 [Define like PROTOTYPES; this can be used by system headers.])
495fi
496])# AC_C_PROTOTYPES
497
498
499# _AC_CXX_STD_TRY(STANDARD, TEST-PROLOGUE, TEST-BODY, OPTION-LIST,
500# ACTION-IF-AVAILABLE, ACTION-IF-UNAVAILABLE)
501# ----------------------------------------------------------------
502# Check whether the C++ compiler accepts features of STANDARD (e.g
503# `cxx98', `cxx11') by trying to compile a program of TEST-PROLOGUE
504# and TEST-BODY. If this fails, try again with each compiler option
505# in the space-separated OPTION-LIST; if one helps, append it to CXX.
506# If eventually successful, run ACTION-IF-AVAILABLE, else
507# ACTION-IF-UNAVAILABLE.
508AC_DEFUN([_AC_CXX_STD_TRY],
509[AC_MSG_CHECKING([for $CXX option to enable ]m4_translit(m4_translit($1, [x], [+]), [a-z], [A-Z])[ features])
510AC_LANG_PUSH(C++)dnl
511AC_CACHE_VAL(ac_cv_prog_cxx_$1,
512[ac_cv_prog_cxx_$1=no
513ac_save_CXX=$CXX
514AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$3])])
515for ac_arg in '' $4
516do
517 CXX="$ac_save_CXX $ac_arg"
518 _AC_COMPILE_IFELSE([], [ac_cv_prog_cxx_$1=$ac_arg])
519 test "x$ac_cv_prog_cxx_$1" != "xno" && break
520done
521rm -f conftest.$ac_ext
522CXX=$ac_save_CXX
523])# AC_CACHE_VAL
524ac_prog_cxx_stdcxx_options=
525case "x$ac_cv_prog_cxx_$1" in
526 x)
527 AC_MSG_RESULT([none needed]) ;;
528 xno)
529 AC_MSG_RESULT([unsupported]) ;;
530 *)
531 ac_prog_cxx_stdcxx_options=" $ac_cv_prog_cxx_$1"
532 CXX=$CXX$ac_prog_cxx_stdcxx_options
533 AC_MSG_RESULT([$ac_cv_prog_cxx_$1]) ;;
534esac
535AC_LANG_POP(C++)dnl
536AS_IF([test "x$ac_cv_prog_cxx_$1" != xno], [$5], [$6])
537])# _AC_CXX_STD_TRY
538
539# _AC_CXX_CXX98_TEST_HEADER
540# -------------------------
541# A C++ header suitable for testing for CXX98.
542AC_DEFUN([_AC_CXX_CXX98_TEST_HEADER],
543[[
544#include <algorithm>
545#include <cstdlib>
546#include <fstream>
547#include <iomanip>
548#include <iostream>
549#include <list>
550#include <map>
551#include <set>
552#include <sstream>
553#include <stdexcept>
554#include <string>
555#include <utility>
556#include <vector>
557
558namespace test {
559 typedef std::vector<std::string> string_vec;
560 typedef std::pair<int,bool> map_value;
561 typedef std::map<std::string,map_value> map_type;
562 typedef std::set<int> set_type;
563
564 template<typename T>
565 class printer {
566 public:
567 printer(std::ostringstream& os): os(os) {}
568 void operator() (T elem) { os << elem << std::endl; }
569 private:
570 std::ostringstream& os;
571 };
572}
573]])# _AC_CXX_CXX98_TEST_HEADER
574
575# _AC_CXX_CXX98_TEST_BODY
576# -----------------------
577# A C++ body suitable for testing for CXX98, assuming the corresponding header.
578AC_DEFUN([_AC_CXX_CXX98_TEST_BODY],
579[[
580
581try {
582 // Basic string.
583 std::string teststr("ASCII text");
584 teststr += " string";
585
586 // Simple vector.
587 test::string_vec testvec;
588 testvec.push_back(teststr);
589 testvec.push_back("foo");
590 testvec.push_back("bar");
591 if (testvec.size() != 3) {
592 throw std::runtime_error("vector size is not 1");
593 }
594
595 // Dump vector into stringstream and obtain string.
596 std::ostringstream os;
597 for (test::string_vec::const_iterator i = testvec.begin();
598 i != testvec.end(); ++i) {
599 if (i + 1 != testvec.end()) {
600 os << teststr << '\n';
601 }
602 }
603 // Check algorithms work.
604 std::for_each(testvec.begin(), testvec.end(), test::printer<std::string>(os));
605 std::string os_out = os.str();
606
607 // Test pair and map.
608 test::map_type testmap;
609 testmap.insert(std::make_pair(std::string("key"),
610 std::make_pair(53,false)));
611
612 // Test set.
613 int values[] = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1};
614 test::set_type testset(values, values + sizeof(values)/sizeof(values[0]));
615 std::list<int> testlist(testset.begin(), testset.end());
616 std::copy(testset.begin(), testset.end(), std::back_inserter(testlist));
617} catch (const std::exception& e) {
618 std::cerr << "Caught exception: " << e.what() << std::endl;
619
620 // Test fstream
621 std::ofstream of("test.txt");
622 of << "Test ASCII text\n" << std::flush;
623 of << "N= " << std::hex << std::setw(8) << std::left << 534 << std::endl;
624 of.close();
625}
626std::exit(0);
627]])
628
629# _AC_CXX_CXX11_TEST_HEADER
630# -------------------------
631# A C++ header suitable for testing for CXX11.
632AC_DEFUN([_AC_CXX_CXX11_TEST_HEADER],
633[[
634#include <deque>
635#include <functional>
636#include <memory>
637#include <tuple>
638#include <array>
639#include <regex>
640#include <iostream>
641
642namespace cxx11test
643{
644 typedef std::shared_ptr<std::string> sptr;
645 typedef std::weak_ptr<std::string> wptr;
646
647 typedef std::tuple<std::string,int,double> tp;
648 typedef std::array<int, 20> int_array;
649
650 constexpr int get_val() { return 20; }
651
652 struct testinit
653 {
654 int i;
655 double d;
656 };
657
658 class delegate {
659 public:
660 delegate(int n) : n(n) {}
661 delegate(): delegate(2354) {}
662
663 virtual int getval() { return this->n; };
664 protected:
665 int n;
666 };
667
668 class overridden : public delegate {
669 public:
670 overridden(int n): delegate(n) {}
671 virtual int getval() override final { return this->n * 2; }
672 };
673
674 class nocopy {
675 public:
676 nocopy(int i): i(i) {}
677 nocopy() = default;
678 nocopy(const nocopy&) = delete;
679 nocopy & operator=(const nocopy&) = delete;
680 private:
681 int i;
682 };
683}
684]])# _AC_CXX_CXX11_TEST_HEADER
685
686# _AC_CXX_CXX11_TEST_BODY
687# -----------------------
688# A C++ body suitable for testing for CXX11, assuming the corresponding header.
689AC_DEFUN([_AC_CXX_CXX11_TEST_BODY],
690[[
691{
692 // Test auto and decltype
693 std::deque<int> d;
694 d.push_front(43);
695 d.push_front(484);
696 d.push_front(3);
697 d.push_front(844);
698 int total = 0;
699 for (auto i = d.begin(); i != d.end(); ++i) { total += *i; }
700
701 auto a1 = 6538;
702 auto a2 = 48573953.4;
703 auto a3 = "String literal";
704
705 decltype(a2) a4 = 34895.034;
706}
707{
708 // Test constexpr
709 short sa[cxx11test::get_val()] = { 0 };
710}
711{
712 // Test initializer lists
713 cxx11test::testinit il = { 4323, 435234.23544 };
714}
715{
716 // Test range-based for and lambda
717 cxx11test::int_array array = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1};
718 for (int &x : array) { x += 23; }
719 std::for_each(array.begin(), array.end(), [](int v1){ std::cout << v1; });
720}
721{
722 using cxx11test::sptr;
723 using cxx11test::wptr;
724
725 sptr sp(new std::string("ASCII string"));
726 wptr wp(sp);
727 sptr sp2(wp);
728}
729{
730 cxx11test::tp tuple("test", 54, 45.53434);
731 double d = std::get<2>(tuple);
732 std::string s;
733 int i;
734 std::tie(s,i,d) = tuple;
735}
736{
737 static std::regex filename_regex("^_?([a-z0-9_.]+-)+[a-z0-9]+$");
738 std::string testmatch("Test if this string matches");
739 bool match = std::regex_search(testmatch, filename_regex);
740}
741{
742 cxx11test::int_array array = {9, 7, 13, 15, 4, 18, 12, 10, 5, 3, 14, 19, 17, 8, 6, 20, 16, 2, 11, 1};
743 cxx11test::int_array::size_type size = array.size();
744}
745{
746 // Test constructor delegation
747 cxx11test::delegate d1;
748 cxx11test::delegate d2();
749 cxx11test::delegate d3(45);
750}
751{
752 // Test override and final
753 cxx11test::overridden o1(55464);
754}
755{
756 // Test nullptr
757 char *c = nullptr;
758}
759{
760 // Test template brackets
761 std::vector<std::pair<int,char*>> v1;
762}
763{
764 // Unicode literals
765 char const *utf8 = u8"UTF-8 string \u2500";
766 char16_t const *utf16 = u"UTF-8 string \u2500";
767 char32_t const *utf32 = U"UTF-32 string \u2500";
768}
769]])
770
771# _AC_PROG_CXX_CXX98 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
772# -------------------------------------------------------------------
773
774# If the C++ compiler is not in ISO C++98 mode by default, try to add
775# an option to output variable CXX to make it so. This macro tries
776# various options that select ISO C++98 on some system or another. It
777# considers the compiler to be in ISO C++98 mode if it handles basic
778# features of the std namespace including: string, containers (list,
779# map, set, vector), streams (fstreams, iostreams, stringstreams,
780# iomanip), pair, exceptions and algorithms.
781
782
783AC_DEFUN([_AC_PROG_CXX_CXX98],
784[_AC_CXX_STD_TRY([cxx98],
785[_AC_CXX_CXX98_TEST_HEADER],
786[_AC_CXX_CXX98_TEST_BODY],
787dnl Try
788dnl GCC -std=gnu++98 (unused restrictive mode: -std=c++98)
789dnl IBM XL C -qlanglvl=extended
790dnl HP aC++ -AA
791dnl Intel ICC -std=gnu++98
792dnl Solaris N/A (default)
793dnl Tru64 N/A (default, but -std gnu could be used)
794dnl with extended modes being tried first.
795[[-std=gnu++98 -std=c++98 -qlanglvl=extended -AA]], [$1], [$2])[]dnl
796])# _AC_PROG_CXX_CXX98
797
798# _AC_PROG_CXX_CXX11 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
799# -------------------------------------------------------------------
800# If the C++ compiler is not in ISO CXX11 mode by default, try to add
801# an option to output variable CXX to make it so. This macro tries
802# various options that select ISO C++11 on some system or another. It
803# considers the compiler to be in ISO C++11 mode if it handles all the
804# tests from the C++98 checks, plus the following: Language features
805# (auto, constexpr, decltype, default/deleted constructors, delegate
806# constructors, final, initializer lists, lambda functions, nullptr,
807# override, range-based for loops, template brackets without spaces,
808# unicode literals) and library features (array, memory (shared_ptr,
809# weak_ptr), regex and tuple types).
810AC_DEFUN([_AC_PROG_CXX_CXX11],
811[_AC_CXX_STD_TRY([cxx11],
812[_AC_CXX_CXX11_TEST_HEADER
813_AC_CXX_CXX98_TEST_HEADER],
814[_AC_CXX_CXX11_TEST_BODY
815_AC_CXX_CXX98_TEST_BODY],
816dnl Try
817dnl GCC -std=gnu++11 (unused restrictive mode: -std=c++11) [and 0x variants]
818dnl IBM XL C -qlanglvl=extended0x
819dnl (pre-V12.1; unused restrictive mode: -qlanglvl=stdcxx11)
820dnl HP aC++ -AA
821dnl Intel ICC -std=c++11 -std=c++0x
822dnl Solaris N/A (no support)
823dnl Tru64 N/A (no support)
824dnl with extended modes being tried first.
825[[-std=gnu++11 -std=c++11 -std=gnu++0x -std=c++0x -qlanglvl=extended0x -AA]], [$1], [$2])[]dnl
826])# _AC_PROG_CXX_CXX11
827
828
829])# m4_version_prereq