From: Michael Altizer (mialtize) Date: Thu, 19 Jan 2017 17:11:20 +0000 (-0500) Subject: Merge pull request #781 in SNORT/snort3 from macros to master X-Git-Tag: 3.0.0-233~105 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e9915efc0ee7b3f17567126c198cfce7f5557166;p=thirdparty%2Fsnort3.git Merge pull request #781 in SNORT/snort3 from macros to master Squashed commit of the following: commit ff0cba0a6121c1cf4d8e99f9dd3eb78ddfcd6827 Author: Michael Altizer Date: Wed Jan 18 21:45:22 2017 -0500 build: Don't disable asserts when compiling with code coverage commit b35985da20ac0dbe8dde56ef9fb6f3e3c35709b4 Author: Michael Altizer Date: Wed Jan 18 21:43:38 2017 -0500 autoconf: Update to latest versions of autoconf-archive macros --- diff --git a/cmake/configure_options.cmake b/cmake/configure_options.cmake index a78009690..81d5622a3 100644 --- a/cmake/configure_options.cmake +++ b/cmake/configure_options.cmake @@ -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" ) diff --git a/m4/ax_code_coverage.m4 b/m4/ax_code_coverage.m4 index 93dfce3a0..5793e4a0d 100644 --- a/m4/ax_code_coverage.m4 +++ b/m4/ax_code_coverage.m4 @@ -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 = ... $(CODE_COVERAGE_CXXFLAGS) ... @@ -45,6 +45,11 @@ # (`make check`) and build a code coverage report detailing the code which # was touched, then print the URI for the report. # +# In earlier versions of this macro, CODE_COVERAGE_LDFLAGS was defined +# instead of CODE_COVERAGE_LIBS. They are both still defined, but use of +# CODE_COVERAGE_LIBS is preferred for clarity; CODE_COVERAGE_LDFLAGS is +# deprecated. They have the same value. +# # This code was derived from Makefile.decl in GLib, originally licenced # under LGPLv2.1+. # @@ -70,7 +75,7 @@ # You should have received a copy of the GNU Lesser General Public License # along with this program. If not, see . -#serial 16 +#serial 20 AC_DEFUN([AX_CODE_COVERAGE],[ dnl Check for --enable-code-coverage @@ -106,49 +111,58 @@ AC_DEFUN([AX_CODE_COVERAGE],[ AC_MSG_ERROR([not compiling with gcc, which is required for gcov code coverage]) ]) - # List of supported lcov versions. - lcov_version_list="1.6 1.7 1.8 1.9 1.10 1.11 1.12" - AC_CHECK_PROG([LCOV], [lcov], [lcov]) AC_CHECK_PROG([GENHTML], [genhtml], [genhtml]) - AS_IF([ test "$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) diff --git a/m4/ax_cxx_compile_stdcxx.m4 b/m4/ax_cxx_compile_stdcxx.m4 index 2c18e49c5..b61fcb631 100644 --- a/m4/ax_cxx_compile_stdcxx.m4 +++ b/m4/ax_cxx_compile_stdcxx.m4 @@ -33,21 +33,23 @@ # Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov # Copyright (c) 2015 Paul Norman # Copyright (c) 2015 Moritz Klammler +# Copyright (c) 2016 Krzesimir Nowak # # 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 +#include +#include + +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 + int multiply(Args... args) + { + return (args * ... * 1); + } + + template + 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, decltype(foo)>::value); + static_assert(std::is_same::value); + } + + namespace test_typename_in_template_template_parameter + { + + template 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 + 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 + 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 + 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 pr = { 1, 2 }; + + auto f1() -> int(&)[2] + { + return arr; + } + + auto f2() -> std::pair& + { + 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 + Bad + f(T*, T*); + + template + Good + f(T1*, T2*); + + static_assert (std::is_same_v); + + } +#endif // !defined(REALLY_CLANG) + + namespace test_inline_variables + { + + template void f(T) + {} + + template inline T g(T) + { + return T{}; + } + + template<> inline void f<>(int) + {} + + template<> int g<>(int) + { + return 5; + } + + } + +} // namespace cxx17 + +#endif // __cplusplus <= 201402L + +]]) diff --git a/m4/ax_cxx_compile_stdcxx_11.m4 b/m4/ax_cxx_compile_stdcxx_11.m4 index 3dd5cf911..0aadeafe7 100644 --- a/m4/ax_cxx_compile_stdcxx_11.m4 +++ b/m4/ax_cxx_compile_stdcxx_11.m4 @@ -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])])