Fix deficiencies in the CMake build:

- Clone minimal Boost dependencies so that the minimal Boost.Test header is
  available.

- Add boostdep-generated CMake code to the top of the top-level
  CMakeLists.txt.

Fixes #127.

CMakeLists.txt

@@ -1,4 +1,36 @@
-cmake_minimum_required(VERSION 3.5)
+# Copyright (C) 2024 T. Zachary Laine
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
+
+if(NOT CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+
+# Generated by `boostdep --cmake parser`
+
+cmake_minimum_required(VERSION 3.8...3.20)
+
+project(boost_parser VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
+
+add_library(boost_parser INTERFACE)
+add_library(Boost::parser ALIAS boost_parser)
+
+target_include_directories(boost_parser INTERFACE include)
+
+target_link_libraries(boost_parser
+  INTERFACE
+    Boost::assert
+    Boost::hana
+    Boost::type_index
+)
+
+if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")
+
+  add_subdirectory(test)
+
+endif()
+
+else()
+
+cmake_minimum_required(VERSION 3.8...3.20)
 project(parse)
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
@@ -9,17 +41,19 @@ set(CXX_STD 17 CACHE STRING "Set to 14, 17, etc., to enable C++14, C++17, etc.")
 message("-- Using -std=c++${CXX_STD}")
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL Clang)
-    add_definitions(-g -Wall)
+    add_definitions(-Wall)
 elseif (CMAKE_CXX_COMPILER_ID STREQUAL GNU)
-    add_definitions(-g -Wall)
+    add_definitions(-Wall)
 elseif (CMAKE_CXX_COMPILER_ID STREQUAL MSVC)
     add_definitions(/W3)
 endif ()
 
+
 ##################################################
 # Build config
 ##################################################
-set(BUILD_WITH_HANA false CACHE BOOL "Build with BOOST_PARSER_USE_HANA_TUPLE defined.")
+set(BUILD_WITH_HANA false CACHE BOOL
+    "Build with optional Hana support (and BOOST_PARSER_USE_HANA_TUPLE defined).")
 if (BUILD_WITH_HANA)
   add_definitions(-DBOOST_PARSER_USE_HANA_TUPLE)
 endif()
@@ -54,8 +88,11 @@ if (Boost_FOUND)
    target_include_directories(parser INTERFACE ${Boost_INCLUDE_DIRS})
 endif()
 
+
 ##################################################
 # Subdirectories
 ##################################################
 add_subdirectory(test)
 add_subdirectory(example)
+
+endif()

cmake/dependencies.cmake

@@ -1,9 +1,58 @@
 # Copyright Louis Dionne 2016
-# Copyright Zach Laine 2016
+# Copyright Zach Laine 2024
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
 
 ###############################################################################
 # Boost
 ###############################################################################
-find_package(Boost)
+set(Boost_USE_STATIC_LIBS ON)
+
+if (NOT BOOST_BRANCH)
+  set(BOOST_BRANCH master)
+endif()
+
+add_custom_target(boost_clone_superproject
+  DEPENDS
+    ${CMAKE_BINARY_DIR}/boost_root
+  COMMENT
+    "Cloning Boost superproject."
+  VERBATIM)
+
+add_custom_command(
+  OUTPUT ${CMAKE_BINARY_DIR}/boost_root
+  COMMAND git clone --depth 100 -b ${BOOST_BRANCH}
+    https://github.com/boostorg/boost.git boost_root
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
+
+add_custom_target(boost_clone_deps
+  DEPENDS
+    ${CMAKE_BINARY_DIR}/boost_root/libs/headers/include
+  COMMENT
+    "Cloning Boost dependencies."
+  VERBATIM)
+add_dependencies(boost_clone_deps boost_clone_superproject)
+
+if (MSVC)
+  set(bootstrap_cmd ./bootstrap.bat)
+else()
+  set(bootstrap_cmd ./bootstrap.sh)
+endif()
+
+add_custom_command(
+  OUTPUT ${CMAKE_BINARY_DIR}/boost_root/libs/headers/include
+  COMMAND git submodule init libs/assert
+  COMMAND git submodule init libs/config
+  COMMAND git submodule init libs/core
+  COMMAND git submodule init libs/hana
+  COMMAND git submodule init tools/build
+  COMMAND git submodule init libs/headers
+  COMMAND git submodule init tools/boost_install
+  COMMAND git submodule update --jobs 3 --depth 100
+  COMMAND ${bootstrap_cmd}
+  COMMAND ./b2 headers
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/boost_root)
+
+add_library(boost INTERFACE)
+add_dependencies(boost boost_clone_deps)
+target_include_directories(boost INTERFACE ${CMAKE_BINARY_DIR}/boost_root)

example/CMakeLists.txt

@@ -11,29 +11,31 @@ enable_testing()
 
 add_custom_target(run_examples COMMAND ${CMAKE_CTEST_COMMAND} -VV -C ${CMAKE_CFG_INTDIR})
 
-macro(add_sample name)
+macro(add_example name)
     add_executable(${name} ${name}.cpp)
-    target_link_libraries(${name} parser)
+    target_link_libraries(${name} parser ${ARGN})
     set_property(TARGET ${name} PROPERTY CXX_STANDARD ${CXX_STD})
     add_test(${name} ${CMAKE_CURRENT_BINARY_DIR}/${name})
 endmacro()
 
-add_sample(hello)
-add_sample(trivial)
-add_sample(trivial_skipper)
-add_sample(semantic_actions)
-add_sample(rule_intro)
-add_sample(struct_rule)
-add_sample(parsing_into_a_struct)
-add_sample(parsing_into_a_class)
-add_sample(roman_numerals)
-add_sample(user_error_handler)
-
-if (Boost_FOUND)
-    if (NOT BUILD_WITHOUT_HANA)
-        add_sample(self_filling_symbol_table)
-        add_sample(json)
-    endif()
-
-    add_sample(callback_json)
+set(libs)
+if (BUILD_WITH_HANA)
+  set(libs boost)
+endif()
+
+add_example(hello ${libs})
+add_example(trivial ${libs})
+add_example(trivial_skipper ${libs})
+add_example(semantic_actions ${libs})
+add_example(rule_intro ${libs})
+add_example(struct_rule ${libs})
+add_example(parsing_into_a_struct ${libs})
+add_example(parsing_into_a_class ${libs})
+add_example(user_error_handler ${libs})
+
+if (BUILD_WITH_HANA)
+  add_example(roman_numerals boost)
+  add_example(self_filling_symbol_table boost)
+  add_example(json boost)
+  add_example(callback_json boost)
 endif()

test/CMakeLists.txt

@@ -11,7 +11,7 @@ add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -j4 -
 ##################################################
 add_executable(parser_ parser.cpp)
 set_property(TARGET parser_ PROPERTY CXX_STANDARD ${CXX_STD})
-target_link_libraries(parser_ parser ${link_flags})
+target_link_libraries(parser_ parser boost ${link_flags})
 if (MSVC)
     target_compile_options(parser_ PRIVATE /source-charset:utf-8 /bigobj)
 endif ()
@@ -19,7 +19,7 @@ add_test(NAME parser_ COMMAND parser_)
 
 add_executable(parser_api parser_api.cpp)
 set_property(TARGET parser_api PROPERTY CXX_STANDARD ${CXX_STD})
-target_link_libraries(parser_api parser ${link_flags})
+target_link_libraries(parser_api parser boost ${link_flags})
 if (MSVC)
     target_compile_options(parser_api PRIVATE /source-charset:utf-8 /bigobj)
 endif ()
@@ -35,12 +35,12 @@ add_executable(
     compile_all_t.cpp
 )
 set_property(TARGET compile_tests PROPERTY CXX_STANDARD ${CXX_STD})
-target_link_libraries(compile_tests parser)
+target_link_libraries(compile_tests parser boost)
 
 macro(add_test_executable name)
     add_executable(${name} ${name}.cpp)
     set_property(TARGET ${name} PROPERTY CXX_STANDARD ${CXX_STD})
-    target_link_libraries(${name} parser ${link_flags})
+    target_link_libraries(${name} parser boost ${link_flags})
     if (MSVC)
         target_compile_options(${name} PRIVATE /source-charset:utf-8 /bigobj)
     endif ()