From 67969af09f4729d041589da5f31ac40c07d2f4be Mon Sep 17 00:00:00 2001 From: "Wladimir J. van der Laan" Date: Thu, 3 Dec 2015 14:44:57 +0100 Subject: [PATCH 1/4] build: Enable C++11 build, require C++11 compiler Implements #6211. --- build-aux/m4/ax_cxx_compile_stdcxx.m4 | 558 ++++++++++++++++++++++++++ configure.ac | 2 + 2 files changed, 560 insertions(+) create mode 100644 build-aux/m4/ax_cxx_compile_stdcxx.m4 diff --git a/build-aux/m4/ax_cxx_compile_stdcxx.m4 b/build-aux/m4/ax_cxx_compile_stdcxx.m4 new file mode 100644 index 0000000000..079e17d2a6 --- /dev/null +++ b/build-aux/m4/ax_cxx_compile_stdcxx.m4 @@ -0,0 +1,558 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CXX_COMPILE_STDCXX(VERSION, [ext|noext], [mandatory|optional]) +# +# DESCRIPTION +# +# Check for baseline language coverage in the compiler for the specified +# version of the C++ standard. If necessary, add switches to CXXFLAGS to +# enable support. VERSION may be '11' (for the C++11 standard) or '14' +# (for the C++14 standard). +# +# The second argument, if specified, indicates whether you insist on an +# extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g. +# -std=c++11). If neither is specified, you get whatever works, with +# preference for an extended mode. +# +# The third argument, if specified 'mandatory' or if left unspecified, +# indicates that baseline support for the specified C++ standard is +# required and that the macro should error out if no mode with that +# support is found. If specified 'optional', then configuration proceeds +# regardless, after defining HAVE_CXX${VERSION} if and only if a +# supporting mode is found. +# +# LICENSE +# +# Copyright (c) 2008 Benjamin Kosnik +# Copyright (c) 2012 Zack Weinberg +# Copyright (c) 2013 Roy Stogner +# Copyright (c) 2014, 2015 Google Inc.; contributed by Alexey Sokolov +# Copyright (c) 2015 Paul Norman +# Copyright (c) 2015 Moritz Klammler +# +# 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 1 + +dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro +dnl (serial version number 13). + +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_fatal([invalid first argument `$1' to AX_CXX_COMPILE_STDCXX])])dnl + m4_if([$2], [], [], + [$2], [ext], [], + [$2], [noext], [], + [m4_fatal([invalid second argument `$2' to AX_CXX_COMPILE_STDCXX])])dnl + m4_if([$3], [], [ax_cxx_compile_cxx$1_required=true], + [$3], [mandatory], [ax_cxx_compile_cxx$1_required=true], + [$3], [optional], [ax_cxx_compile_cxx$1_required=false], + [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 + for switch in -std=gnu++$1 -std=gnu++0x; do + cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch]) + AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch, + $cachevar, + [ac_save_CXXFLAGS="$CXXFLAGS" + CXXFLAGS="$CXXFLAGS $switch" + AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])], + [eval $cachevar=yes], + [eval $cachevar=no]) + CXXFLAGS="$ac_save_CXXFLAGS"]) + if eval test x\$$cachevar = xyes; then + CXXFLAGS="$CXXFLAGS $switch" + ac_success=yes + break + fi + done + fi]) + + m4_if([$2], [ext], [], [dnl + if test x$ac_success = xno; then + 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, + $cachevar, + [ac_save_CXXFLAGS="$CXXFLAGS" + CXXFLAGS="$CXXFLAGS $switch" + AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])], + [eval $cachevar=yes], + [eval $cachevar=no]) + CXXFLAGS="$ac_save_CXXFLAGS"]) + if eval test x\$$cachevar = xyes; then + CXXFLAGS="$CXXFLAGS $switch" + ac_success=yes + break + fi + done + fi]) + AC_LANG_POP([C++]) + if test x$ax_cxx_compile_cxx$1_required = xtrue; then + if test x$ac_success = xno; then + AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.]) + fi + else + if test x$ac_success = xno; then + HAVE_CXX$1=0 + AC_MSG_NOTICE([No compiler with C++$1 support was found]) + else + HAVE_CXX$1=1 + AC_DEFINE(HAVE_CXX$1,1, + [define if the compiler supports basic C++$1 syntax]) + fi + + AC_SUBST(HAVE_CXX$1) + fi +]) + + +dnl Test body for checking C++11 support + +m4_define([_AX_CXX_COMPILE_STDCXX_testbody_11], + _AX_CXX_COMPILE_STDCXX_testbody_new_in_11 +) + + +dnl Test body for checking C++14 support + +m4_define([_AX_CXX_COMPILE_STDCXX_testbody_14], + _AX_CXX_COMPILE_STDCXX_testbody_new_in_11 + _AX_CXX_COMPILE_STDCXX_testbody_new_in_14 +) + + +dnl Tests for new features in C++11 + +m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_11], [[ + +// If the compiler admits that it is not ready for C++11, why torture it? +// Hopefully, this will speed up the test. + +#ifndef __cplusplus + +#error "This is not a C++ compiler" + +#elif __cplusplus < 201103L + +#error "This is not a C++11 compiler" + +#else + +namespace cxx11 +{ + + namespace test_static_assert + { + + template + struct check + { + static_assert(sizeof(int) <= sizeof(T), "not big enough"); + }; + + } + + namespace test_final_override + { + + struct Base + { + virtual void f() {} + }; + + struct Derived : public Base + { + virtual void f() override {} + }; + + } + + namespace test_double_right_angle_brackets + { + + template < typename T > + struct check {}; + + typedef check single_type; + typedef check> double_type; + typedef check>> triple_type; + typedef check>>> quadruple_type; + + } + + namespace test_decltype + { + + int + f() + { + int a = 1; + decltype(a) b = 2; + return a + b; + } + + } + + namespace test_type_deduction + { + + template < typename T1, typename T2 > + struct is_same + { + static const bool value = false; + }; + + template < typename T > + struct is_same + { + static const bool value = true; + }; + + template < typename T1, typename T2 > + auto + add(T1 a1, T2 a2) -> decltype(a1 + a2) + { + return a1 + a2; + } + + int + test(const int c, volatile int v) + { + static_assert(is_same::value == true, ""); + static_assert(is_same::value == false, ""); + static_assert(is_same::value == false, ""); + auto ac = c; + auto av = v; + auto sumi = ac + av + 'x'; + auto sumf = ac + av + 1.0; + static_assert(is_same::value == true, ""); + static_assert(is_same::value == true, ""); + static_assert(is_same::value == true, ""); + static_assert(is_same::value == false, ""); + static_assert(is_same::value == true, ""); + return (sumf > 0.0) ? sumi : add(c, v); + } + + } + + namespace test_noexcept + { + + int f() { return 0; } + int g() noexcept { return 0; } + + static_assert(noexcept(f()) == false, ""); + static_assert(noexcept(g()) == true, ""); + + } + + namespace test_constexpr + { + + template < typename CharT > + unsigned long constexpr + strlen_c_r(const CharT *const s, const unsigned long acc) noexcept + { + return *s ? strlen_c_r(s + 1, acc + 1) : acc; + } + + template < typename CharT > + unsigned long constexpr + strlen_c(const CharT *const s) noexcept + { + return strlen_c_r(s, 0UL); + } + + static_assert(strlen_c("") == 0UL, ""); + static_assert(strlen_c("1") == 1UL, ""); + static_assert(strlen_c("example") == 7UL, ""); + static_assert(strlen_c("another\0example") == 7UL, ""); + + } + + namespace test_rvalue_references + { + + template < int N > + struct answer + { + static constexpr int value = N; + }; + + answer<1> f(int&) { return answer<1>(); } + answer<2> f(const int&) { return answer<2>(); } + answer<3> f(int&&) { return answer<3>(); } + + void + test() + { + int i = 0; + const int c = 0; + static_assert(decltype(f(i))::value == 1, ""); + static_assert(decltype(f(c))::value == 2, ""); + static_assert(decltype(f(0))::value == 3, ""); + } + + } + + namespace test_uniform_initialization + { + + struct test + { + static const int zero {}; + static const int one {1}; + }; + + static_assert(test::zero == 0, ""); + static_assert(test::one == 1, ""); + + } + + namespace test_lambdas + { + + void + test1() + { + auto lambda1 = [](){}; + auto lambda2 = lambda1; + lambda1(); + lambda2(); + } + + int + test2() + { + auto a = [](int i, int j){ return i + j; }(1, 2); + auto b = []() -> int { return '0'; }(); + auto c = [=](){ return a + b; }(); + auto d = [&](){ return c; }(); + auto e = [a, &b](int x) mutable { + const auto identity = [](int y){ return y; }; + for (auto i = 0; i < a; ++i) + a += b--; + return x + identity(a + b); + }(0); + return a + b + c + d + e; + } + + int + test3() + { + const auto nullary = [](){ return 0; }; + const auto unary = [](int x){ return x; }; + using nullary_t = decltype(nullary); + using unary_t = decltype(unary); + const auto higher1st = [](nullary_t f){ return f(); }; + const auto higher2nd = [unary](nullary_t f1){ + return [unary, f1](unary_t f2){ return f2(unary(f1())); }; + }; + return higher1st(nullary) + higher2nd(nullary)(unary); + } + + } + + namespace test_variadic_templates + { + + template + struct sum; + + template + struct sum + { + static constexpr auto value = N0 + sum::value; + }; + + template <> + struct sum<> + { + static constexpr auto value = 0; + }; + + static_assert(sum<>::value == 0, ""); + static_assert(sum<1>::value == 1, ""); + static_assert(sum<23>::value == 23, ""); + static_assert(sum<1, 2>::value == 3, ""); + static_assert(sum<5, 5, 11>::value == 21, ""); + static_assert(sum<2, 3, 5, 7, 11, 13>::value == 41, ""); + + } + + // http://stackoverflow.com/questions/13728184/template-aliases-and-sfinae + // Clang 3.1 fails with headers of libstd++ 4.8.3 when using std::function + // because of this. + namespace test_template_alias_sfinae + { + + struct foo {}; + + template + using member = typename T::member_type; + + template + void func(...) {} + + template + void func(member*) {} + + void test(); + + void test() { func(0); } + + } + +} // namespace cxx11 + +#endif // __cplusplus >= 201103L + +]]) + + +dnl Tests for new features in C++14 + +m4_define([_AX_CXX_COMPILE_STDCXX_testbody_new_in_14], [[ + +// If the compiler admits that it is not ready for C++14, 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++14 compiler" + +#else + +namespace cxx14 +{ + + namespace test_polymorphic_lambdas + { + + int + test() + { + const auto lambda = [](auto&&... args){ + const auto istiny = [](auto x){ + return (sizeof(x) == 1UL) ? 1 : 0; + }; + const int aretiny[] = { istiny(args)... }; + return aretiny[0]; + }; + return lambda(1, 1L, 1.0f, '1'); + } + + } + + namespace test_binary_literals + { + + constexpr auto ivii = 0b0000000000101010; + static_assert(ivii == 42, "wrong value"); + + } + + namespace test_generalized_constexpr + { + + template < typename CharT > + constexpr unsigned long + strlen_c(const CharT *const s) noexcept + { + auto length = 0UL; + for (auto p = s; *p; ++p) + ++length; + return length; + } + + static_assert(strlen_c("") == 0UL, ""); + static_assert(strlen_c("x") == 1UL, ""); + static_assert(strlen_c("test") == 4UL, ""); + static_assert(strlen_c("another\0test") == 7UL, ""); + + } + + namespace test_lambda_init_capture + { + + int + test() + { + auto x = 0; + const auto lambda1 = [a = x](int b){ return a + b; }; + const auto lambda2 = [a = lambda1(x)](){ return a; }; + return lambda2(); + } + + } + + namespace test_digit_seperators + { + + constexpr auto ten_million = 100'000'000; + static_assert(ten_million == 100000000, ""); + + } + + namespace test_return_type_deduction + { + + auto f(int& x) { return x; } + decltype(auto) g(int& x) { return x; } + + template < typename T1, typename T2 > + struct is_same + { + static constexpr auto value = false; + }; + + template < typename T > + struct is_same + { + static constexpr auto value = true; + }; + + int + test() + { + auto x = 0; + static_assert(is_same::value, ""); + static_assert(is_same::value, ""); + return x; + } + + } + +} // namespace cxx14 + +#endif // __cplusplus >= 201402L + +]]) diff --git a/configure.ac b/configure.ac index 100bb79e11..713ea59eda 100644 --- a/configure.ac +++ b/configure.ac @@ -55,6 +55,8 @@ case $host in lt_cv_deplibs_check_method="pass_all" ;; esac +dnl Require C++11 compiler (no GNU extensions) +AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory]) dnl Libtool init checks. LT_INIT([pic-only]) From a398549b3bfc976f1b6408f41af7dac3514e2553 Mon Sep 17 00:00:00 2001 From: Cory Fields Date: Thu, 21 Apr 2016 16:23:40 -0400 Subject: [PATCH 2/4] depends: use c++11 --- depends/hosts/darwin.mk | 2 +- depends/packages/bdb.mk | 1 + depends/packages/boost.mk | 2 +- depends/packages/protobuf.mk | 1 + depends/packages/qt.mk | 2 +- depends/packages/zeromq.mk | 1 + 6 files changed, 6 insertions(+), 3 deletions(-) diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk index 2958dc50cc..dbe6d00795 100644 --- a/depends/hosts/darwin.mk +++ b/depends/hosts/darwin.mk @@ -3,7 +3,7 @@ OSX_SDK_VERSION=10.9 OSX_SDK=$(SDK_PATH)/MacOSX$(OSX_SDK_VERSION).sdk LD64_VERSION=241.9 darwin_CC=clang -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -mlinker-version=$(LD64_VERSION) -darwin_CXX=clang++ -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -mlinker-version=$(LD64_VERSION) +darwin_CXX=clang++ -target $(host) -mmacosx-version-min=$(OSX_MIN_VERSION) --sysroot $(OSX_SDK) -mlinker-version=$(LD64_VERSION) -stdlib=libc++ darwin_CFLAGS=-pipe darwin_CXXFLAGS=$(darwin_CFLAGS) diff --git a/depends/packages/bdb.mk b/depends/packages/bdb.mk index e2f85ad4fc..200d57314e 100644 --- a/depends/packages/bdb.mk +++ b/depends/packages/bdb.mk @@ -9,6 +9,7 @@ define $(package)_set_vars $(package)_config_opts=--disable-shared --enable-cxx --disable-replication $(package)_config_opts_mingw32=--enable-mingw $(package)_config_opts_linux=--with-pic +$(package)_cxxflags=-std=c++11 endef define $(package)_preprocess_cmds diff --git a/depends/packages/boost.mk b/depends/packages/boost.mk index 215c694b6b..ef1307c241 100644 --- a/depends/packages/boost.mk +++ b/depends/packages/boost.mk @@ -20,7 +20,7 @@ $(package)_archiver_$(host_os)=$($(package)_ar) $(package)_toolset_darwin=darwin $(package)_archiver_darwin=$($(package)_libtool) $(package)_config_libraries=chrono,filesystem,program_options,system,thread,test -$(package)_cxxflags=-fvisibility=hidden +$(package)_cxxflags=-std=c++11 -fvisibility=hidden $(package)_cxxflags_linux=-fPIC endef diff --git a/depends/packages/protobuf.mk b/depends/packages/protobuf.mk index 5affad2837..54d3fd9245 100644 --- a/depends/packages/protobuf.mk +++ b/depends/packages/protobuf.mk @@ -4,6 +4,7 @@ $(package)_download_path=$(native_$(package)_download_path) $(package)_file_name=$(native_$(package)_file_name) $(package)_sha256_hash=$(native_$(package)_sha256_hash) $(package)_dependencies=native_$(package) +$(package)_cxxflags=-std=c++11 define $(package)_set_vars $(package)_config_opts=--disable-shared --with-protoc=$(build_prefix)/bin/protoc diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk index e5ac0c9651..c1fc8e3058 100644 --- a/depends/packages/qt.mk +++ b/depends/packages/qt.mk @@ -49,7 +49,7 @@ $(package)_config_opts += -no-sql-sqlite2 $(package)_config_opts += -prefix $(host_prefix) $(package)_config_opts += -hostprefix $(build_prefix) $(package)_config_opts += -bindir $(build_prefix)/bin -$(package)_config_opts += -no-c++11 +$(package)_config_opts += -c++11 $(package)_config_opts += -openssl-linked $(package)_config_opts += -v $(package)_config_opts += -static diff --git a/depends/packages/zeromq.mk b/depends/packages/zeromq.mk index 7b866e9c0f..b3f18db056 100644 --- a/depends/packages/zeromq.mk +++ b/depends/packages/zeromq.mk @@ -7,6 +7,7 @@ $(package)_sha256_hash=e00b2967e074990d0538361cc79084a0a92892df2c6e7585da34e4c61 define $(package)_set_vars $(package)_config_opts=--without-documentation --disable-shared $(package)_config_opts_linux=--with-pic + $(package)_cxxflags=-std=c++11 endef define $(package)_config_cmds From 2aacc72727b891aa6f42e97d16e8954fba014703 Mon Sep 17 00:00:00 2001 From: "Wladimir J. van der Laan" Date: Thu, 28 Apr 2016 10:18:06 +0200 Subject: [PATCH 3/4] build: update ax_cxx_compile_stdcxx to serial 4 --- build-aux/m4/ax_cxx_compile_stdcxx.m4 | 50 +++++++++++++++------------ 1 file changed, 27 insertions(+), 23 deletions(-) diff --git a/build-aux/m4/ax_cxx_compile_stdcxx.m4 b/build-aux/m4/ax_cxx_compile_stdcxx.m4 index 079e17d2a6..2c18e49c56 100644 --- a/build-aux/m4/ax_cxx_compile_stdcxx.m4 +++ b/build-aux/m4/ax_cxx_compile_stdcxx.m4 @@ -9,9 +9,9 @@ # DESCRIPTION # # Check for baseline language coverage in the compiler for the specified -# version of the C++ standard. If necessary, add switches to CXXFLAGS to -# enable support. VERSION may be '11' (for the C++11 standard) or '14' -# (for the C++14 standard). +# version of the C++ standard. If necessary, add switches to CXX and +# CXXCPP to enable support. VERSION may be '11' (for the C++11 standard) +# or '14' (for the C++14 standard). # # The second argument, if specified, indicates whether you insist on an # extended mode (e.g. -std=gnu++11) or a strict conformance mode (e.g. @@ -39,7 +39,7 @@ # and this notice are preserved. This file is offered as-is, without any # warranty. -#serial 1 +#serial 4 dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro dnl (serial version number 13). @@ -74,14 +74,17 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch]) AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch, $cachevar, - [ac_save_CXXFLAGS="$CXXFLAGS" - CXXFLAGS="$CXXFLAGS $switch" + [ac_save_CXX="$CXX" + CXX="$CXX $switch" AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])], [eval $cachevar=yes], [eval $cachevar=no]) - CXXFLAGS="$ac_save_CXXFLAGS"]) + CXX="$ac_save_CXX"]) if eval test x\$$cachevar = xyes; then - CXXFLAGS="$CXXFLAGS $switch" + CXX="$CXX $switch" + if test -n "$CXXCPP" ; then + CXXCPP="$CXXCPP $switch" + fi ac_success=yes break fi @@ -97,14 +100,17 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl cachevar=AS_TR_SH([ax_cv_cxx_compile_cxx$1_$switch]) AC_CACHE_CHECK(whether $CXX supports C++$1 features with $switch, $cachevar, - [ac_save_CXXFLAGS="$CXXFLAGS" - CXXFLAGS="$CXXFLAGS $switch" + [ac_save_CXX="$CXX" + CXX="$CXX $switch" AC_COMPILE_IFELSE([AC_LANG_SOURCE([_AX_CXX_COMPILE_STDCXX_testbody_$1])], [eval $cachevar=yes], [eval $cachevar=no]) - CXXFLAGS="$ac_save_CXXFLAGS"]) + CXX="$ac_save_CXX"]) if eval test x\$$cachevar = xyes; then - CXXFLAGS="$CXXFLAGS $switch" + CXX="$CXX $switch" + if test -n "$CXXCPP" ; then + CXXCPP="$CXXCPP $switch" + fi ac_success=yes break fi @@ -115,18 +121,16 @@ AC_DEFUN([AX_CXX_COMPILE_STDCXX], [dnl if test x$ac_success = xno; then AC_MSG_ERROR([*** A compiler with support for C++$1 language features is required.]) fi - else - if test x$ac_success = xno; then - HAVE_CXX$1=0 - AC_MSG_NOTICE([No compiler with C++$1 support was found]) - else - HAVE_CXX$1=1 - AC_DEFINE(HAVE_CXX$1,1, - [define if the compiler supports basic C++$1 syntax]) - fi - - AC_SUBST(HAVE_CXX$1) fi + if test x$ac_success = xno; then + HAVE_CXX$1=0 + AC_MSG_NOTICE([No compiler with C++$1 support was found]) + else + HAVE_CXX$1=1 + AC_DEFINE(HAVE_CXX$1,1, + [define if the compiler supports basic C++$1 syntax]) + fi + AC_SUBST(HAVE_CXX$1) ]) From 7df92242a99db68962048aad34532e6c0e7a42fa Mon Sep 17 00:00:00 2001 From: "Wladimir J. van der Laan" Date: Thu, 28 Apr 2016 10:43:39 +0200 Subject: [PATCH 4/4] doc: Add note about new build/test requirements to release notes [skip ci] --- doc/release-notes.md | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/doc/release-notes.md b/doc/release-notes.md index 7a673cc350..7d44b8cda9 100644 --- a/doc/release-notes.md +++ b/doc/release-notes.md @@ -43,6 +43,19 @@ RPC low-level changes 32-bit and 64-bit platforms, and the txids were missing in the hashed data. This has been fixed, but this means that the output will be different than from previous versions. +C++11 and Python 3 +------------------- + +Various code modernizations have been done. The Bitcoin Core code base has +started using C++11. This means that a C++11-capable compiler is now needed for +building. Effectively this means GCC 4.7 or higher, or Clang 3.3 or higher. + +When cross-compiling for a target that doesn't have C++11 libraries, configure with +`./configure --enable-glibc-back-compat ... LDFLAGS=-static-libstdc++`. + +For running the functional tests in `qa/rpc-tests`, Python3.4 or higher is now +required. + 0.13.0 Change log =================