c++ - qtum-core build issue when compiling with OpenSSL

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Learn more about Teams CXX libbitcoin_common_a-key.o key.cpp: In function ‘bool EnsureLowS(std::vector<unsigned char>&)’: key.cpp:149:19: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’ if (BN_cmp(sig->s, halforder) > 0) { In file included from /usr/include/openssl/ecdsa.h:10:0, from key.cpp:17: /usr/include/openssl/ec.h:1039:16: error: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’ typedef struct ECDSA_SIG_st ECDSA_SIG; key.cpp:151:19: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’ BN_sub(sig->s, order, sig->s); In file included from /usr/include/openssl/ecdsa.h:10:0, from key.cpp:17: /usr/include/openssl/ec.h:1039:16: error: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’ typedef struct ECDSA_SIG_st ECDSA_SIG; key.cpp:151:34: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’ BN_sub(sig->s, order, sig->s); In file included from /usr/include/openssl/ecdsa.h:10:0, from key.cpp:17: /usr/include/openssl/ec.h:1039:16: error: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’ typedef struct ECDSA_SIG_st ECDSA_SIG; make[2]: *** [libbitcoin_common_a-key.o] Error 1 make[2]: Leaving directory `/home/qtum_data/qtum/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/qtum_data/qtum/src' make: *** [all-recursive] Error 1

What is the problem and how do I fix it?

./autogen.sh
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, `build-aux'.
libtoolize: copying file `build-aux/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIR, `build-aux/m4'.
libtoolize: copying file `build-aux/m4/libtool.m4'
libtoolize: copying file `build-aux/m4/ltoptions.m4'
libtoolize: copying file `build-aux/m4/ltsugar.m4'
libtoolize: copying file `build-aux/m4/ltversion.m4'
configure.ac:32: installing 'build-aux/missing'
Makefile.am:12: warning: user variable 'GZIP_ENV' defined here ...
/usr/share/automake-1.14/am/distdir.am: ... overrides Automake variable 'GZIP_ENV' defined here
src/Makefile.am: installing 'build-aux/depcomp'
src/Makefile.am:703: warning: user target '.mm.o' defined here ...
/usr/share/automake-1.14/am/depend2.am: ... overrides Automake target '.mm.o' defined here
parallel-tests: installing 'build-aux/test-driver'
Configure
./configure --without-gui
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 make supports nested variables... yes
checking whether to enable maintainer-specific portions of Makefiles... yes
checking whether make supports nested variables... (cached) yes
checking for g++... g++
configure: Using jni: no
configure: ******
configure: WARNING: experimental build
configure: Experimental features do not have stable APIs or properties, and may not be safe for production use.
configure: Building ECDH module: yes
configure: ******
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating libsecp256k1.pc
config.status: creating src/libsecp256k1-config.h
config.status: executing depfiles commands
config.status: executing libtool commands
Fixing libtool for -rpath problems.
Options used to compile and link:
  with wallet   = yes
  with gui / qt = no
  with zmq      = no
  with test     = yes
  with bench    = yes
  with upnp     = auto
  debug enabled = no
  werror        = no
  target os     = linux
  build os      =
  CC            = gcc
  CFLAGS        = -g -O2
  CPPFLAGS      =  -DQTUM_BUILD -DHAVE_BUILD_INFO -D__STDC_FORMAT_MACROS
  CXX           = g++ -std=c++11
  CXXFLAGS      = -g -O2 -Wall -Wextra -Wformat -Wvla -Wformat-security -Wno-unused-parameter -Wno-unknown-pragmas
  LDFLAGS       =
Making all in src
make[1]: Entering directory `/home/qtum_data/qtum/src'
make[2]: Entering directory `/home/qtum_data/qtum/src'
  CXX      crypto/libbitcoinconsensus_la-aes.lo
  CXX      crypto/libbitcoinconsensus_la-chacha20.lo
  CXX      crypto/libbitcoinconsensus_la-hmac_sha256.lo
  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
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-b64.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-crypto-mcf.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-crypto_scrypt-check.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-crypto_scrypt-hash.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-crypto_scrypt-hexconvert.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-crypto_scrypt-nosse.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-crypto-scrypt-saltgen.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-sha256.lo
  CC       cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-slowequals.lo
  CXX      libbitcoinconsensus_la-arith_uint256.lo
  CXX      consensus/libbitcoinconsensus_la-merkle.lo
  CXX      libbitcoinconsensus_la-hash.lo
  CXX      primitives/libbitcoinconsensus_la-block.lo
  CXX      primitives/libbitcoinconsensus_la-transaction.lo
  CXX      libbitcoinconsensus_la-pubkey.lo
  CXX      script/libbitcoinconsensus_la-bitcoinconsensus.lo
  CXX      script/libbitcoinconsensus_la-interpreter.lo
  CXX      script/libbitcoinconsensus_la-script.lo
  CXX      script/libbitcoinconsensus_la-script_error.lo
  CXX      libbitcoinconsensus_la-uint256.lo
  CXX      libbitcoinconsensus_la-utilstrencodings.lo
make[3]: Entering directory `/home/qtum_data/qtum/src/secp256k1'
gcc -I. -g -O2 -Wall -Wextra -Wno-unused-function -c src/gen_context.c -o gen_context.o
gcc gen_context.o -o gen_context
./gen_context
  CC       src/libsecp256k1_la-secp256k1.lo
  CCLD     libsecp256k1.la
make[3]: Leaving directory `/home/qtum_data/qtum/src/secp256k1'
  CXXLD    libbitcoinconsensus.la
copying selected object files to avoid basename conflicts...
  CXX      qtumd-bitcoind.o
  CXX      libbitcoin_server_a-addrman.o
  CXX      libbitcoin_server_a-addrdb.o
  CXX      libbitcoin_server_a-bloom.o
  CXX      libbitcoin_server_a-blockencodings.o
  CXX      libbitcoin_server_a-chain.o
  CXX      libbitcoin_server_a-checkpoints.o
  CXX      libbitcoin_server_a-httprpc.o
  CXX      libbitcoin_server_a-httpserver.o
  CXX      libbitcoin_server_a-init.o
  CXX      libbitcoin_server_a-dbwrapper.o
  CXX      libbitcoin_server_a-merkleblock.o
  CXX      libbitcoin_server_a-miner.o
  CXX      libbitcoin_server_a-net.o
  CXX      libbitcoin_server_a-net_processing.o
  CXX      libbitcoin_server_a-noui.o
  CXX      policy/libbitcoin_server_a-fees.o
  CXX      policy/libbitcoin_server_a-policy.o
  CXX      libbitcoin_server_a-pow.o
  CXX      libbitcoin_server_a-pos.o
  CXX      libbitcoin_server_a-rest.o
  CXX      rpc/libbitcoin_server_a-blockchain.o
  CXX      rpc/libbitcoin_server_a-mining.o
  CXX      rpc/libbitcoin_server_a-misc.o
  CXX      rpc/libbitcoin_server_a-net.o
  CXX      rpc/libbitcoin_server_a-rawtransaction.o
  CXX      rpc/libbitcoin_server_a-server.o
  CXX      script/libbitcoin_server_a-sigcache.o
  CXX      script/libbitcoin_server_a-ismine.o
  CXX      libbitcoin_server_a-timedata.o
  CXX      libbitcoin_server_a-torcontrol.o
  CXX      libbitcoin_server_a-txdb.o
  CXX      libbitcoin_server_a-txmempool.o
  CXX      libbitcoin_server_a-ui_interface.o
  CXX      libbitcoin_server_a-validation.o
  CXX      libbitcoin_server_a-validationinterface.o
  CXX      libbitcoin_server_a-versionbits.o
  CXX      qtum/libbitcoin_server_a-qtumstate.o
  CXX      qtum/libbitcoin_server_a-qtumtransaction.o
  CXX      qtum/libbitcoin_server_a-qtumDGP.o
  CXX      consensus/libbitcoin_server_a-consensus.o
  CXX      qtum/libbitcoin_server_a-storageresults.o
  AR       libbitcoin_server.a
  CXX      libbitcoin_common_a-amount.o
  CXX      libbitcoin_common_a-base58.o
  CXX      libbitcoin_common_a-chainparams.o
  CXX      libbitcoin_common_a-coins.o
  CXX      libbitcoin_common_a-compressor.o
  CXX      libbitcoin_common_a-core_read.o
  CXX      libbitcoin_common_a-core_write.o
  CXX      libbitcoin_common_a-key.o
key.cpp: In function ‘bool EnsureLowS(std::vector<unsigned char>&)’:
key.cpp:149:19: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
     if (BN_cmp(sig->s, halforder) > 0) {
In file included from /usr/include/openssl/ecdsa.h:10:0,
                 from key.cpp:17:
/usr/include/openssl/ec.h:1039:16: error: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
key.cpp:151:19: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
         BN_sub(sig->s, order, sig->s);
In file included from /usr/include/openssl/ecdsa.h:10:0,
                 from key.cpp:17:
/usr/include/openssl/ec.h:1039:16: error: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
key.cpp:151:34: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
         BN_sub(sig->s, order, sig->s);
In file included from /usr/include/openssl/ecdsa.h:10:0,
                 from key.cpp:17:
/usr/include/openssl/ec.h:1039:16: error: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
make[2]: *** [libbitcoin_common_a-key.o] Error 1
make[2]: Leaving directory `/home/qtum_data/qtum/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/qtum_data/qtum/src'
make: *** [all-recursive] Error 1
my server Environment
OS - Linux xxxxxxx-X10SLL-F 4.4.0-31-generic #50~14.04.1-Ubuntu SMP Wed Jul 13 01:07:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
openssl version - OpenSSL 1.0.2g 
How can I solve this problem?
  CXX      libbitcoin_common_a-key.o
key.cpp: In function ‘bool EnsureLowS(std::vector<unsigned char>&)’:
key.cpp:149:19: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
     if (BN_cmp(sig->s, halforder) > 0) {
It looks like your machine has OpenSSL 1.1.0 locally, but the qtum-core is written for OpenSSL 1.0.2. That's because of the incomplete type ECDSA_SIG error. OpenSSL 1.1.0 made a bunch of things private in OpenSSL 1.1.0 that used to be public and accessible in OpenSSL 1.0.2.
You can do two things. First, downgrade to OpenSSL 1.0.2 so qtum-core can access the data members again.
Second, you can upgrade qtum-core to a version that is OpenSSL 1.1.0 aware. If qtum-core is not OpenSSL 1.1.0 aware, then file a bug report to let the authors know about the problem.
The problem you are asking about may be Qtum Issue 382. If so, then it looks like your only choice is Option (1), downgrade to OpenSSL 1.0.2.
Here is how to configure with a different OpenSSL (i.e., a different on than the one from a distribution).
$ git clone https://github.com/qtumproject/qtum.git
$ cd qtum/
$ autoreconf -f -i
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'build-aux'.
libtoolize: copying file 'build-aux/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'build-aux/m4'.
libtoolize: copying file 'build-aux/m4/libtool.m4'
libtoolize: copying file 'build-aux/m4/ltoptions.m4'
libtoolize: copying file 'build-aux/m4/ltsugar.m4'
libtoolize: copying file 'build-aux/m4/ltversion.m4'
libtoolize: copying file 'build-aux/m4/lt~obsolete.m4'
Here is the important part, before running make:
$ ./configure --help | grep -i -E 'ssl|crypto'
  SSL_CFLAGS  C compiler flags for SSL, overriding pkg-config
  SSL_LIBS    linker flags for SSL, overriding pkg-config
  CRYPTO_CFLAGS
              C compiler flags for CRYPTO, overriding pkg-config
  CRYPTO_LIBS linker flags for CRYPTO, overriding pkg-config
There are no --with-XXX options to control OpenSSL, but it can be picked up through pkg-config. So...
I install upgrades in /usr/local. Headers are in /usr/local/include, and libraries are in /usr/local/lib64 (because it is Fedora). The local version of OpenSSL is 1.0.2:
$ cat /usr/local/lib64/pkgconfig/libssl.pc
prefix=/usr/local
exec_prefix=${prefix}
libdir=${exec_prefix}/lib64
includedir=${prefix}/include
Name: OpenSSL-libssl
Description: Secure Sockets Layer and cryptography libraries
Version: 1.0.2n
Requires.private: libcrypto
Libs: -L${libdir} -lssl
Libs.private: -Wl,-R,/usr/local/lib64 -Wl,--enable-new-dtags -ldl
Cflags: -I${includedir}
$ cat /usr/local/lib64/pkgconfig/libcrypto.pc
prefix=/usr/local
exec_prefix=${prefix}
libdir=${exec_prefix}/lib64
includedir=${prefix}/include
enginesdir=${libdir}/engines
Name: OpenSSL-libcrypto
Description: OpenSSL cryptography library
Version: 1.0.2n
Requires:
Libs: -L${libdir} -lcrypto
Libs.private: -Wl,-R,/usr/local/lib64 -Wl,--enable-new-dtags -ldl
Cflags: -I${includedir}
I am ready to build. The next step is (--disable-wallet because I don't feel like fixing the Autools errors):
$ PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig/ ./configure --disable-wallet
configure: loading site script /usr/local/share/config.site
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking for a BSD-compatible install... /usr/local/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/local/bin/mkdir -p
checking for gawk... gawk
checking for dynamic linked boost test... yes
checking for mismatched boost c++11 scoped enums... ok
checking for SSL... yes
checking for CRYPTO... yes
Related, I have some scripts to install OpenSSL and some other programs at Noloader | Build-Scripts. Clone the repo, then run:
./build-cacerts.sh  # install CA's needed for Wget downloads
./build-openssl.sh  # download, build and install OpenSSL in /usr/local
I use the build scripts for downlevel clients, like Fedora 7 and Solaris 10. You don't have to use the build scripts. But you do need to get a copy of OpenSSL 1.0.2 installed locally.
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