configure: *error: * A compiler with support for C++11 language features is required.*** #8630

Hi!

I am trying to compile bitcoin from scratch which for some reason does not work as well as it used to when I compiled v0.12 a few months ago. This whole Berkley compatible-thingy have always been a strange thing. I am not sure I even use the command. Would appreicate a lot if a solid guide would be put up online at Github or so, created by Linux pros :+1: :) It should be much easier than it is today to compile bitcoin from source.

This is how it looks like.

/home/bitcoin-0.13# ./configure --enable-hardening CPPFLAGS="-I/usr/local/BerkeleyDB.4.8/include -O2" LDFLAGS="-L/usr/local/BerkeleyDB.4.8/lib" checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for gawk... no checking for mawk... mawk checking whether make sets $(MAKE)... yes checking whether to enable maintainer-specific portions of Makefiles... yes checking whether make supports nested variables... yes checking for g++... g++ checking whether the C++ compiler works... yes checking for C++ compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking for style of include used by make... GNU checking dependency style of g++... gcc3 checking for g++... g++ checking whether we are using the GNU Objective C++ compiler... no checking whether g++ accepts -g... no checking whether g++ supports C++11 features by default... no checking whether g++ supports C++11 features with -std=c++11... no checking whether g++ supports C++11 features with -std=c++0x... no checking whether g++ supports C++11 features with +std=c++11... no checking whether g++ supports C++11 features with -h std=c++11... no configure: error: *** A compiler with support for C++11 language features is required. /home/bitcoin-0.13#

gcc --version gcc (Debian 4.7.2-5) 4.7.2 Copyright (C) 2012 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

g++ --version g++ (Debian 4.7.2-5) 4.7.2 Copyright (C) 2012 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

How do I solve this?! Thanks a ton in advance.

Compiling v0.12 works without this error message. But would love to try 0.13 out. Anyone has aaany idea how to bypass this?

0.13 requires C++11 (where 0.12 does not). It looks like, that you gcc does not support it (although I thought 4.7 supports C++11). You should probably try to upgrade gcc.

Your compiler doesn't support C++11. C++11 support is a requirement since version 0.13, quoting the release notes:

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++.

The suggestion would be to use the executables from bitcoin.org, or upgrade your compiler, or cross-compile on another machine with a newer compiler.

"Effectively this means GCC 4.7 or higher"... the OP stated he's using 4.7.2, as am I. so what version really is good enough?

The current minimum required version of GCC is 4.8. See dependencies.

thanks, man!