[build] Add vendored libboost

Custom extract made using bcp based on 1.65.1

.gitmodules

@@ -58,3 +58,6 @@
 [submodule "vendor/optional"]
 	path = vendor/optional
 	url = https://github.com/mapbox/Optional.git
+[submodule "vendor/boost"]
+	path = vendor/boost
+	url = https://github.com/mapbox/mapbox-gl-native-boost.git

cmake/benchmark.cmake

@@ -13,7 +13,6 @@ target_link_libraries(mbgl-benchmark
     PRIVATE mbgl-core
 )
 
-target_add_mason_package(mbgl-benchmark PRIVATE boost)
 target_add_mason_package(mbgl-benchmark PRIVATE benchmark)
 
 mbgl_platform_benchmark()

cmake/core.cmake

@@ -21,6 +21,7 @@ target_link_libraries(mbgl-core PRIVATE
 # FIXME: We should not leak these many
 # libraries in our public interface.
 target_link_libraries(mbgl-core PUBLIC
+    boost
     geojson.hpp
     geometry.hpp
     icu
@@ -32,8 +33,6 @@ target_link_libraries(mbgl-core PUBLIC
     vector-tile
 )
 
-target_add_mason_package(mbgl-core PRIVATE boost)
-
 mbgl_platform_core()
 
 create_source_groups(mbgl-core)

cmake/filesource.cmake

@@ -2,8 +2,6 @@
 load_sources_list(MBGL_FILESOURCE_FILES cmake/filesource-files.txt)
 add_library(mbgl-filesource STATIC ${MBGL_FILESOURCE_FILES})
 
-target_add_mason_package(mbgl-filesource PRIVATE boost)
-
 target_include_directories(mbgl-filesource
     PRIVATE include
     PRIVATE src

cmake/mason-dependencies.cmake

@@ -1,6 +1,5 @@
 # All dependencies in a single separate file so its checksum can be used in a CI cache key name
 
-mason_use(boost VERSION 1.65.1 HEADER_ONLY)
 mason_use(cheap-ruler VERSION 2.5.3 HEADER_ONLY)
 mason_use(pixelmatch VERSION 0.10.0 HEADER_ONLY)
 

cmake/offline.cmake

@@ -14,7 +14,6 @@ target_link_libraries(mbgl-offline
     PRIVATE mbgl-core
 )
 
-target_add_mason_package(mbgl-offline PRIVATE boost)
 target_add_mason_package(mbgl-offline PRIVATE args)
 
 mbgl_platform_offline()

cmake/render.cmake

@@ -10,7 +10,6 @@ target_link_libraries(mbgl-render
     PRIVATE mbgl-core
 )
 
-target_add_mason_package(mbgl-render PRIVATE boost)
 target_add_mason_package(mbgl-render PRIVATE args)
 
 mbgl_platform_render()

cmake/test.cmake

@@ -30,7 +30,6 @@ target_link_libraries(mbgl-test PRIVATE
 )
 
 target_add_mason_package(mbgl-test PRIVATE pixelmatch)
-target_add_mason_package(mbgl-test PRIVATE boost)
 
 mbgl_platform_test()
 

cmake/vendor.cmake

@@ -3,6 +3,7 @@ execute_process(
     WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/vendor
 )
 
+include(${CMAKE_SOURCE_DIR}/vendor/boost.cmake)
 include(${CMAKE_SOURCE_DIR}/vendor/earcut.hpp.cmake)
 include(${CMAKE_SOURCE_DIR}/vendor/expected.cmake)
 include(${CMAKE_SOURCE_DIR}/vendor/geojson-vt-cpp.cmake)

vendor/boost.cmake

@@ -0,0 +1,5 @@
+add_library(boost INTERFACE)
+
+target_include_directories(boost SYSTEM INTERFACE
+    ${CMAKE_SOURCE_DIR}/vendor/boost/include
+)