Why does make fail?

Question

C++ / C#

Compiling this
installed all dependencies from readme
Ubuntu 16.04 x86_x64

./autogen.sh ./configure.sh

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/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 make supports nested variables... yes
checking whether to enable maintainer-specific portions of Makefiles... yes
checking whether make supports nested variables... (cached) yes
checking whether enable SSE/SSE2 optimizations... 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 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 whether gcc understands -c and -o together... yes
checking dependency style of gcc... gcc3
checking how to run the C preprocessor... gcc -E
checking how to run the C++ preprocessor... g++ -E
checking for gcc... gcc
checking whether we are using the GNU Objective C compiler... no
checking whether gcc accepts -g... no
checking dependency style of gcc... gcc3
checking whether ln -s works... yes
checking for g++... g++
checking whether we are using the GNU Objective C++ compiler... no
checking whether g++ accepts -g... no
checking dependency style of g++... gcc3
checking for a sed that does not truncate output... /bin/sed
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... /usr/bin/lcov
checking for java... /usr/bin/java
checking for genhtml... /usr/bin/genhtml
checking for git... /usr/bin/git
checking for ccache... /usr/bin/ccache
checking for xgettext... /usr/bin/xgettext
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 for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -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 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 whether C++ compiler accepts -Wstack-protector... yes
checking whether C++ compiler accepts -fstack-protector-all... yes
checking whether C++ compiler accepts -fPIE... 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 the linker accepts -pie... yes
checking endian.h usability... yes
checking endian.h presence... yes
checking for endian.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 whether le32toh is declared... yes
checking whether le64toh is declared... yes
checking whether htole32 is declared... yes
checking whether htole64 is declared... yes
checking whether be32toh is declared... yes
checking whether be64toh is declared... yes
checking whether htobe32 is declared... yes
checking whether htobe64 is declared... yes
checking for MSG_NOSIGNAL... yes
checking for Berkeley DB C++ headers... default
checking for main in -ldb_cxx-4.8... yes
checking miniupnpc/miniwget.h usability... yes
checking miniupnpc/miniwget.h presence... yes
checking for miniupnpc/miniwget.h... yes
checking for main in -lminiupnpc... yes
checking miniupnpc/miniupnpc.h usability... yes
checking miniupnpc/miniupnpc.h presence... yes
checking for miniupnpc/miniupnpc.h... yes
checking for main in -lminiupnpc... (cached) yes
checking miniupnpc/upnpcommands.h usability... yes
checking miniupnpc/upnpcommands.h presence... yes
checking for miniupnpc/upnpcommands.h... yes
checking for main in -lminiupnpc... (cached) yes
checking miniupnpc/upnperrors.h usability... yes
checking miniupnpc/upnperrors.h presence... yes
checking for miniupnpc/upnperrors.h... yes
checking for main in -lminiupnpc... (cached) yes
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... 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... 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 PROTOBUF... yes
checking for QR... yes
checking for protoc... /usr/bin/protoc
checking whether to build VERGEd... yes
checking for QT... no
checking for QT... yes
checking for QT_TEST... yes
checking for QT_DBUS... yes
checking for moc-qt5... no
checking for moc5... no
checking for moc... /usr/bin/moc
checking for uic-qt5... no
checking for uic5... no
checking for uic... /usr/bin/uic
checking for rcc-qt5... no
checking for rcc5... no
checking for rcc... /usr/bin/rcc
checking for lrelease-qt5... no
checking for lrelease5... no
checking for lrelease... /usr/bin/lrelease
checking for lupdate-qt5... no
checking for lupdate5... no
checking for lupdate... /usr/bin/lupdate
checking whether to build VERGE Core GUI... yes (Qt5)
checking if ccache should be used... yes
checking if wallet should be enabled... yes
checking whether to build with support for UPnP... yes
checking whether to build with UPnP enabled by default... no
checking whether to build GUI with support for D-Bus... yes
checking whether to build GUI with support for QR codes... yes
checking whether to build test_bitcoin-qt... yes
checking whether to build test_bitcoin... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
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 qa/pull-tester/run-bitcoind-for-test.sh
config.status: creating qa/pull-tester/build-tests.sh
config.status: creating src/config/verge-config.h
config.status: executing depfiles commands

then
make
log.txt , lying on the github (does not fit into the message)
gcc tried 5.4, 7.0, 4.9
What could be the problem?

Answer 1

Because you have a new version of openssl (1.1+), in which the miracle developers have radically changed the interface.
Install the old version and you will be happy.

Answer 2

The error is that you are using the BIGNUM type without a declaration:

bignum.h:51:24: error: invalid use of incomplete type 'BIGNUM {aka struct bignum_st}'