Bitcoin Core (0.11.0) does not build on OpenBSD 5.7 #6491

Why is bitcoind always such a PoS to compile...

Making all in src CXX crypto/libbitcoinconsensus_la-hmac_sha512.lo CXX crypto/libbitcoinconsensus_la-ripemd160.lo CXX crypto/libbitcoinconsensus_la-sha1.lo CXX crypto/libbitcoinconsensus_la-sha256.lo CXX crypto/libbitcoinconsensus_la-sha512.lo CXX libbitcoinconsensus_la-eccryptoverify.lo CXX libbitcoinconsensus_la-ecwrapper.lo CXX libbitcoinconsensus_la-hash.lo CXX primitives/libbitcoinconsensus_la-transaction.lo CXX libbitcoinconsensus_la-pubkey.lo CXX script/libbitcoinconsensus_la-bitcoinconsensus.lo CXX script/libbitcoinconsensus_la-interpreter.lo script/interpreter.cpp: In function 'bool CheckMinimalPush(const valtype&, opcodetype)': script/interpreter.cpp:227: warning: comparison between signed and unsigned integer expressions CXX script/libbitcoinconsensus_la-script.lo CXX libbitcoinconsensus_la-uint256.lo CXX libbitcoinconsensus_la-utilstrencodings.lo CXXLD libbitcoinconsensus.la CXX bitcoind-bitcoind.o In file included from main.h:14, from bitcoind.cpp:9: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-addrman.o CXX libbitcoin_server_a-alert.o CXX libbitcoin_server_a-bloom.o CXX libbitcoin_server_a-chain.o In file included from chain.cpp:6: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-checkpoints.o In file included from main.h:14, from checkpoints.cpp:8: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-init.o In file included from main.h:14, from init.cpp:18: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions init.cpp: In function 'bool AppInit2(boost::thread_group&, CScheduler&)': init.cpp:797: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-leveldbwrapper.o CXX libbitcoin_server_a-main.o In file included from main.h:14, from main.cpp:6: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-merkleblock.o CXX libbitcoin_server_a-miner.o In file included from main.h:14, from miner.cpp:13: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-net.o CXX libbitcoin_server_a-noui.o CXX policy/libbitcoin_server_a-fees.o CXX libbitcoin_server_a-pow.o In file included from pow.cpp:9: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-rest.o In file included from main.h:14, from rest.cpp:8: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions rest.cpp: In function 'bool rest_getutxos(AcceptedConnection_, const std::string&, const std::string&, const std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&, bool)': rest.cpp:430: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-rpcblockchain.o In file included from main.h:14, from rpcblockchain.cpp:8: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-rpcmining.o In file included from main.h:14, from rpcmining.cpp:12: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-rpcmisc.o In file included from main.h:14, from rpcmisc.cpp:9: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions In member function 'bool CBlockIndex::IsValid(BlockStatus) const CXX libbitcoin_server_a-rpcnet.o In file included from main.h:14, from rpcnet.cpp:8: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-rpcrawtransaction.o In file included from main.h:14, from rpcrawtransaction.cpp:11: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-rpcserver.o CXX script/libbitcoin_server_a-sigcache.o CXX libbitcoin_server_a-timedata.o CXX libbitcoin_server_a-txdb.o In file included from main.h:14, from txdb.cpp:10: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-txmempool.o In file included from main.h:14, from txmempool.cpp:11: chain.h: In member function 'bool CBlockIndex::IsValid(BlockStatus) const': chain.h:260: warning: comparison between signed and unsigned integer expressions chain.h: In member function 'bool CBlockIndex::RaiseValidity(BlockStatus)': chain.h:270: warning: comparison between signed and unsigned integer expressions txmempool.cpp: In member function 'void CTxMemPool::removeCoinbaseSpends(const CCoinsViewCache_, unsigned int)': txmempool.cpp:169: warning: comparison between signed and unsigned integer expressions CXX libbitcoin_server_a-validationinterface.o AR libbitcoin_server.a CXX libbitcoin_common_a-amount.o CXX libbitcoin_common_a-arith_uint256.o CXX libbitcoin_common_a-base58.o CXX libbitcoin_common_a-chainparams.o chainparams.cpp: In constructor 'CMainParams::CMainParams()': chainparams.cpp:127: error: too many initializers for 'Checkpoints::CCheckpointData' chainparams.cpp: In constructor 'CTestNetParams::CTestNetParams()': chainparams.cpp:186: error: too many initializers for 'Checkpoints::CCheckpointData' chainparams.cpp: In constructor 'CRegTestParams::CRegTestParams()': chainparams.cpp:233: error: too many initializers for 'Checkpoints::CCheckpointData' /usr/local/include/boost/assign/list_of.hpp: In member function 'Container boost::assign_detail::converter<DerivedTAssign, Iterator>::convert(const Container_, boost::assign_detail::default_type_tag) const [with Container = Checkpoints::CCheckpointData, DerivedTAssign = boost::assign_detail::generic_list<std::pair<int, uint256> >, Iterator = std::Deque_iterator<std::pair<int, uint256>, std::pair<int, uint256>&, std::pair<int, uint256>>]': /usr/local/include/boost/assign/list_of.hpp:142: instantiated from 'Container boost::assign_detail::converter<DerivedTAssign, Iterator>::convert_to_container() const [with Container = Checkpoints::CCheckpointData, DerivedTAssign = boost::assign_detail::generic_list<std::pair<int, uint256> >, Iterator = std::Deque_iterator<std::pair<int, uint256>, std::pair<int, uint256>&, std::pair<int, uint256>>]' /usr/local/include/boost/assign/list_of.hpp:436: instantiated from 'boost::assign_detail::generic_list<T>::operator Container() const [with Container = Checkpoints::CCheckpointData, T = std::pair<int, uint256>]' chainparams.cpp:127: instantiated from here /usr/local/include/boost/assign/list_of.hpp:163: error: no matching function for call to 'Checkpoints::CCheckpointData::CCheckpointData(std::Deque_iterator<std::pair<int, uint256>, std::pair<int, uint256>&, std::pair<int, uint256>>, std::Deque_iterator<std::pair<int, uint256>, std::pair<int, uint256>&, std::pair<int, uint256>>)' checkpoints.h:22: note: candidates are: Checkpoints::CCheckpointData::CCheckpointData() checkpoints.h:22: note: Checkpoints::CCheckpointData::CCheckpointData(const Checkpoints::CCheckpointData&) /usr/local/include/boost/system/error_code.hpp: At global scope: /usr/local/include/boost/system/error_code.hpp:214: warning: 'boost::system::posix_category' defined but not used /usr/local/include/boost/system/error_code.hpp:215: warning: 'boost::system::errno_ecat' defined but not used /usr/local/include/boost/system/error_code.hpp:216: warning: 'boost::system::native_ecat' defined but not used _\ Error 1 in src (Makefile:3054 'libbitcoin_common_a-chainparams.o': @echo " CXX " libbitcoin_common_a-chainparams.o;g++ -DHAVE_CONFIG_...) *** Error 1 in src (Makefile:6287 'all-recursive') *** Error 1 in /home/bitcoin-0.11.0 (Makefile:549 'all-recursive')

I tested previous version and 0.10.2 works well.

Same on debian 7

root@is05 /usr/local/src/bitcoin # make CDPATH="${ZSH_VERSION+.}:" && cd . && /bin/bash /usr/local/src/bitcoin/build-aux/missing --run aclocal-1.11 -I build-aux/m4 cd . && /bin/bash /usr/local/src/bitcoin/build-aux/missing --run automake-1.11 --foreign CDPATH="${ZSH_VERSION+.}:" && cd . && /bin/bash /usr/local/src/bitcoin/build-aux/missing --run autoconf /bin/bash ./config.status --recheck running CONFIG_SHELL=/bin/bash /bin/bash ./configure --with-cli --without-gui --with-incompatible-bdb --disable-shared --with-pic --with-bignum=no --disable-shared --with-pic --no-create --no-recursion 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... gawk 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 how to print strings... printf checking for gcc... gcc checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking dependency style of gcc... gcc3 checking for a sed that does not truncate output... /bin/sed checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for fgrep... /bin/grep -F checking for ld used by gcc... /usr/bin/ld checking if the linker (/usr/bin/ld) is GNU ld... yes checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister (/usr/bin/nm -B) interface... BSD nm checking whether ln -s works... yes checking the maximum length of command line arguments... 3458764513820540925 checking whether the shell understands some XSI constructs... yes checking whether the shell understands "+="... yes checking how to convert x86_64-unknown-linux-gnu file names to x86_64-unknown-linux-gnu format... func_convert_file_noop checking how to convert x86_64-unknown-linux-gnu file names to toolchain format... func_convert_file_noop checking for /usr/bin/ld option to reload object files... -r checking for objdump... objdump checking how to recognize dependent libraries... pass_all checking for dlltool... no checking how to associate runtime and link libraries... printf %s\n checking for ar... ar checking for archiver @FILE support... @ checking for strip... strip checking for ranlib... ranlib checking command to parse /usr/bin/nm -B output from gcc object... ok checking for sysroot... no checking for mt... mt checking if mt is a manifest tool... no checking how to run the C preprocessor... gcc -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking for dlfcn.h... yes checking for objdir... .libs checking if gcc supports -fno-rtti -fno-exceptions... no checking for gcc option to produce PIC... -fPIC -DPIC checking if gcc PIC flag -fPIC -DPIC works... yes checking if gcc static flag -static works... yes checking if gcc supports -c -o file.o... yes checking if gcc supports -c -o file.o... (cached) yes checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking dynamic linker characteristics... GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking whether stripping libraries is possible... yes checking if libtool supports shared libraries... yes checking whether to build shared libraries... no checking whether to build static libraries... yes checking how to run the C++ preprocessor... g++ -E checking for ld used by g++... /usr/bin/ld -m elf_x86_64 checking if the linker (/usr/bin/ld -m elf_x86_64) is GNU ld... yes checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking for g++ option to produce PIC... -fPIC -DPIC checking if g++ PIC flag -fPIC -DPIC works... yes checking if g++ static flag -static works... yes checking if g++ supports -c -o file.o... yes checking if g++ supports -c -o file.o... (cached) yes checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes checking dynamic linker characteristics... (cached) GNU/Linux ld.so checking how to hardcode library paths into programs... immediate checking for ar... /usr/bin/ar checking for ranlib... /usr/bin/ranlib checking for strip... /usr/bin/strip checking for gcov... /usr/bin/gcov checking for lcov... no checking for java... no checking for genhtml... no checking for git... /usr/bin/git checking for ccache... no checking for xgettext... no checking for hexdump... /usr/bin/hexdump checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking whether byte ordering is bigendian... no checking if compiler needs -Werror to reject unknown flags... no checking for the pthreads library -lpthreads... no checking whether pthreads work without any flags... no checking whether pthreads work with -Kthread... no checking whether pthreads work with -kthread... no checking for the pthreads library -llthread... no checking whether pthreads work with -pthread... yes checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE checking if more special flags are required for pthreads... no checking for PTHREAD_PRIO_INHERIT... no checking for special C compiler options needed for large files... no checking for _FILE_OFFSET_BITS value needed for large files... no checking whether strerror_r is declared... yes checking for strerror_r... yes checking whether strerror_r returns char ... yes checking whether the linker accepts -Wl,--large-address-aware... no checking for attribute((visibility))... yes checking for attribute((dllexport))... no checking for attribute((dllimport))... no checking whether C++ compiler accepts -Wstack-protector... yes checking whether C++ compiler accepts -fstack-protector-all... yes checking whether C++ preprocessor accepts -D_FORTIFY_SOURCE=2... yes checking whether C++ preprocessor accepts -U_FORTIFY_SOURCE... yes checking whether the linker accepts -Wl,--dynamicbase... no checking whether the linker accepts -Wl,--nxcompat... no checking whether the linker accepts -Wl,-z,relro... yes checking whether the linker accepts -Wl,-z,now... yes checking whether C++ compiler accepts -fPIE... yes checking whether the linker accepts -pie... yes checking endian.h usability... yes checking endian.h presence... yes checking for endian.h... yes checking sys/endian.h usability... no checking sys/endian.h presence... no checking for sys/endian.h... no checking byteswap.h usability... yes checking byteswap.h presence... yes checking for byteswap.h... yes checking stdio.h usability... yes checking stdio.h presence... yes checking for stdio.h... yes checking for stdlib.h... (cached) yes checking for unistd.h... (cached) yes checking for strings.h... (cached) yes checking for sys/types.h... (cached) yes checking for sys/stat.h... (cached) yes checking sys/select.h usability... yes checking sys/select.h presence... yes checking for sys/select.h... yes checking sys/prctl.h usability... yes checking sys/prctl.h presence... yes checking for sys/prctl.h... yes checking for library containing getaddrinfo_a... -lanl checking for library containing inet_pton... none required checking whether strnlen is declared... yes checking whether le16toh is declared... yes checking whether le32toh is declared... yes checking whether le64toh is declared... yes checking whether htole16 is declared... yes checking whether htole32 is declared... yes checking whether htole64 is declared... yes checking whether be16toh is declared... yes checking whether be32toh is declared... yes checking whether be64toh is declared... yes checking whether htobe16 is declared... yes checking whether htobe32 is declared... yes checking whether htobe64 is declared... yes checking whether bswap_16 is declared... yes checking whether bswap_32 is declared... yes checking whether bswap_64 is declared... yes checking for MSG_NOSIGNAL... yes checking for library containing clock_gettime... -lrt checking for visibility attribute... yes checking for Berkeley DB C++ headers... default configure: WARNING: Found Berkeley DB other than 4.8; wallets opened by this build will not be portable! checking for main in -ldb_cxx-4.8... no checking for main in -ldb_cxx... yes checking miniupnpc/miniwget.h usability... no checking miniupnpc/miniwget.h presence... no checking for miniupnpc/miniwget.h... no checking miniupnpc/miniupnpc.h usability... no checking miniupnpc/miniupnpc.h presence... no checking for miniupnpc/miniupnpc.h... no checking miniupnpc/upnpcommands.h usability... no checking miniupnpc/upnpcommands.h presence... no checking for miniupnpc/upnpcommands.h... no checking miniupnpc/upnperrors.h usability... no checking miniupnpc/upnperrors.h presence... no checking for miniupnpc/upnperrors.h... no checking whether to build Bitcoin Core GUI... no (Qt) checking for boostlib >= 1.20.0... yes checking whether the Boost::System library is available... yes checking for exit in -lboost_system... yes checking whether the Boost::Filesystem library is available... yes checking for exit in -lboost_filesystem... yes checking whether the Boost::Program_Options library is available... yes checking for exit in -lboost_program_options-mt... yes checking whether the Boost::Thread library is available... yes checking for exit in -lboost_thread... yes checking whether the Boost::Chrono library is available... yes checking for exit in -lboost_chrono-mt... yes checking whether the Boost::Unit_Test_Framework library is available... yes checking for dynamic linked boost test... yes checking for SSL... yes checking for CRYPTO... yes checking for RAND_egd in -lcrypto... yes checking openssl/ec.h usability... yes checking openssl/ec.h presence... yes checking for openssl/ec.h... yes checking whether to build bitcoind... yes checking whether to build utils (bitcoin-cli bitcoin-tx)... yes checking whether to build libraries... yes checking if ccache should be used... no checking if wallet should be enabled... yes checking whether to build with support for UPnP... no checking whether to build test_bitcoin... yes checking whether to reduce exports... no configure: creating ./config.status Fixing libtool for -rpath problems. /bin/bash ./config.status config.status: creating libbitcoinconsensus.pc config.status: creating Makefile config.status: creating src/Makefile config.status: creating share/setup.nsi config.status: creating share/qt/Info.plist config.status: creating src/test/buildenv.py config.status: creating qa/pull-tester/run-bitcoind-for-test.sh config.status: creating qa/pull-tester/tests-config.sh config.status: creating src/config/bitcoin-config.h config.status: executing depfiles commands config.status: executing libtool commands Making all in src make[1]: Entering directory /usr/local/src/bitcoin/src' make[2]: Entering directory/usr/local/src/bitcoin/src' CXX crypto/libbitcoinconsensus_la-hmac_sha512.lo CXX crypto/libbitcoinconsensus_la-ripemd160.lo In file included from ./crypto/common.h:14:0, from crypto/ripemd160.cpp:7: ./compat/endian.h:111:17: error: expected unqualified-id before 'extension' ./compat/endian.h:111:17: error: expected ')' before 'extension' ./compat/endian.h:111:17: error: expected unqualified-id before ')' token ./compat/endian.h:118:17: error: expected ')' before 'host_16bits' ./compat/endian.h:125:17: error: expected unqualified-id before 'extension' ./compat/endian.h:125:17: error: expected ')' before 'extension' ./compat/endian.h:125:17: error: expected unqualified-id before ')' token ./compat/endian.h:132:17: error: expected ')' before 'little_endian_16bits' make[2]: **\ [crypto/libbitcoinconsensus_la-ripemd160.lo] Error 1 make[2]: Leaving directory /usr/local/src/bitcoin/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory/usr/local/src/bitcoin/src' make: *** [all-recursive] Error 1

I had a similar problem on Ubuntu 14.04 LTS going from v0.10.x to v0.11.x. To solve it, I did the following:

make clean
git status

Delete any files/changes reported by git (since I didn't edit any source). Then it built as normal.

Alternatively, if there is nothing important in the tree you can wipe it clean in one command with git clean -f -x -d.

cd /usr/local/src/bitcoind/ git checkout v0.10.2 -> make -> make install -> Works

make clean git clean -f -x -d git pull git checkout v0.11.0 git status -> no reports ./autogen.sh ./configure --with-cli --without-gui --with-incompatible-bdb make make install

works.

Thanks 4 Support

LOG: http://pastebin.com/JJhbi76S

@laanwj : without git?

I have the same issue as OP. I'm compiling with gcc 4.1.2, maybe that is the reason? (I'm on Centos 5 :\ )

up

Git master compiles using OpenBSD 5.7, but needs some special steps, follow this guide: https://github.com/bitcoin/bitcoin/blob/master/doc/build-openbsd.md