This adds the bitcoinconsensus library as a target.
This library exports 3 symbols:

• bitcoinconsensus_verify_script
• bitcoinconsensus_verify_script_with_amount
• bitcoinconsensus_version

A few manipulations are required to get the same output than autotools.
These can be later removed but are kept for now in order to not break
the software relying on the current autotools format.

Depends on D4197.

mkdir -p buildcmake/install && cd buildcmake
cmake -GNinja .. -DCMAKE_INSTALL_PREFIX=install
ninja install

ls install/lib

Should return 1 file and 2 symbolic links:

• libbitcoinconsensus.so.0.0.0
• libbitcoinconsensus.so.0 (link to libbitcoinconsensus.so.0.0.0)
• libbitcoinconsensus.so (link to libbitcoinconsensus.so.0) ls install/include

Should return bitcoinconsensus.h.

nm -D --defined-only install/lib/libbitcoinconsensus.so

Check the exported symbols contain the 3 above mentioned functions, and
no other public function.

ninja check # There are additional test cases in `script_tests.cpp`

rm -rf *
mkdir install
cmake -GNinja .. -DCMAKE_INSTALL_PREFIX=install \
  -DCMAKE_TOOLCHAIN_FILE=../cmake/platforms/OSX.cmake
ninja install

ls install/lib

Should return 1 file and 1 symbolic link:

• libbitcoinconsensus.0.dylib
• libbitcoinconsensus.dylib (link to libbitcoinconsensus.0.dylib) ls install/include

Should return bitcoinconsensus.h.

rm -rf *
mkdir install
cmake -GNinja .. -DCMAKE_INSTALL_PREFIX=install \
  -DBUILD_BITCOIN_SEEDER=OFF \
  -DCMAKE_TOOLCHAIN_FILE=../cmake/platforms/Win64.cmake
ninja install

ls install/lib

Should return 1 file :

• libbitcoinconsensus-0.dll ls install/include

Should return bitcoinconsensus.h.