cmake: Build test_bitcoin executable

cmake/module/AddBoostIfNeeded.cmake

@@ -64,4 +64,15 @@ function(add_boost_if_needed)
     set(CMAKE_REQUIRED_DEFINITIONS)
   endif()
 
+  if(BUILD_TESTS)
+    # Some package managers, such as vcpkg, vendor Boost.Test separately
+    # from the rest of the headers, so we have to check for it individually.
+    list(APPEND CMAKE_REQUIRED_DEFINITIONS -DBOOST_TEST_NO_MAIN)
+    include(CheckIncludeFileCXX)
+    check_include_file_cxx(boost/test/included/unit_test.hpp HAVE_BOOST_INCLUDED_UNIT_TEST_H)
+    if(NOT HAVE_BOOST_INCLUDED_UNIT_TEST_H)
+      message(FATAL_ERROR "Building test_bitcoin executable requested but boost/test/included/unit_test.hpp header not available.")
+    endif()
+  endif()
+
 endfunction()

cmake/module/GenerateHeaders.cmake

@@ -0,0 +1,21 @@
+# Copyright (c) 2023-present The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://opensource.org/license/mit/.
+
+function(generate_header_from_json json_source_relpath)
+  add_custom_command(
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${json_source_relpath}.h
+    COMMAND ${CMAKE_COMMAND} -DJSON_SOURCE_PATH=${CMAKE_CURRENT_SOURCE_DIR}/${json_source_relpath} -DHEADER_PATH=${CMAKE_CURRENT_BINARY_DIR}/${json_source_relpath}.h -P ${PROJECT_SOURCE_DIR}/cmake/script/GenerateHeaderFromJson.cmake
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${json_source_relpath} ${PROJECT_SOURCE_DIR}/cmake/script/GenerateHeaderFromJson.cmake
+    VERBATIM
+  )
+endfunction()
+
+function(generate_header_from_raw raw_source_relpath)
+  add_custom_command(
+    OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${raw_source_relpath}.h
+    COMMAND ${CMAKE_COMMAND} -DRAW_SOURCE_PATH=${CMAKE_CURRENT_SOURCE_DIR}/${raw_source_relpath} -DHEADER_PATH=${CMAKE_CURRENT_BINARY_DIR}/${raw_source_relpath}.h -P ${PROJECT_SOURCE_DIR}/cmake/script/GenerateHeaderFromRaw.cmake
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${raw_source_relpath} ${PROJECT_SOURCE_DIR}/cmake/script/GenerateHeaderFromRaw.cmake
+    VERBATIM
+  )
+endfunction()

cmake/script/GenerateHeaderFromJson.cmake

@@ -0,0 +1,24 @@
+# Copyright (c) 2023-present The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://opensource.org/license/mit/.
+
+file(READ ${JSON_SOURCE_PATH} hex_content HEX)
+string(REGEX MATCHALL "([A-Za-z0-9][A-Za-z0-9])" bytes "${hex_content}")
+
+file(WRITE ${HEADER_PATH} "#include <string>\n")
+file(APPEND ${HEADER_PATH} "namespace json_tests{\n")
+get_filename_component(json_source_basename ${JSON_SOURCE_PATH} NAME_WE)
+file(APPEND ${HEADER_PATH} "static const std::string ${json_source_basename}{\n")
+
+set(i 0)
+foreach(byte ${bytes})
+  math(EXPR i "${i} + 1")
+  math(EXPR remainder "${i} % 8")
+  if(remainder EQUAL 0)
+    file(APPEND ${HEADER_PATH} "0x${byte},\n")
+  else()
+    file(APPEND ${HEADER_PATH} "0x${byte}, ")
+  endif()
+endforeach()
+
+file(APPEND ${HEADER_PATH} "\n};};")

cmake/script/GenerateHeaderFromRaw.cmake

@@ -0,0 +1,22 @@
+# Copyright (c) 2023-present The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://opensource.org/license/mit/.
+
+file(READ ${RAW_SOURCE_PATH} hex_content HEX)
+string(REGEX MATCHALL "([A-Za-z0-9][A-Za-z0-9])" bytes "${hex_content}")
+
+get_filename_component(raw_source_basename ${RAW_SOURCE_PATH} NAME_WE)
+file(WRITE ${HEADER_PATH} "static unsigned const char ${raw_source_basename}_raw[] = {\n")
+
+set(i 0)
+foreach(byte ${bytes})
+  math(EXPR i "${i} + 1")
+  math(EXPR remainder "${i} % 8")
+  if(remainder EQUAL 0)
+    file(APPEND ${HEADER_PATH} "0x${byte},\n")
+  else()
+    file(APPEND ${HEADER_PATH} "0x${byte}, ")
+  endif()
+endforeach()
+
+file(APPEND ${HEADER_PATH} "\n};")