21 files changed, 1371 insertions, 0 deletions
diff --git a/cmake/AddCustomXXXTimestamp.cmake b/cmake/AddCustomXXXTimestamp.cmake
new file mode 100644
index 000000000..ca9398873
--- /dev/null
+++ b/cmake/AddCustomXXXTimestamp.cmake
@@ -0,0 +1,145 @@
+macro(_parse_arguments_with_multi_hack ORIGINAL_COMMAND_LINE)
+    # cmake_parse_arguments() put all the MULTIS in a single variable; you
+    # lose the ability to see for example multiple COMMANDs. To be able to
+    # passthrough multiple MULTIS, we add a marker after every MULTI. This
+    # allows us to reassemble the correct amount again before giving it to
+    # the wrapped command with _reassemble_command_line().
+
+    set(COMMAND_LINE "${ORIGINAL_COMMAND_LINE}")
+
+    foreach(MULTI IN LISTS MULTIS)
+        string(REPLACE "${MULTI}" "${MULTI};:::" COMMAND_LINE "${COMMAND_LINE}")
+    endforeach(MULTI)
+
+    cmake_parse_arguments(PARAM "${OPTIONS}" "${SINGLES}" "${MULTIS}" ${COMMAND_LINE})
+endmacro()
+
+macro(_reassemble_command_line)
+    # Reassemble the command line as we original got it.
+    set(NEW_COMMAND_LINE ${PARAM_UNPARSED_ARGUMENTS})
+
+    foreach(OPTION IN LISTS OPTIONS)
+        if (PARAM_${OPTION})
+            list(APPEND NEW_COMMAND_LINE "${OPTION}")
+        endif (PARAM_${OPTION})
+    endforeach(OPTION)
+
+    foreach(SINGLE IN LISTS SINGLES)
+        if (PARAM_${SINGLE})
+            list(APPEND NEW_COMMAND_LINE "${SINGLE}" "${PARAM_${SINGLE}}")
+        endif (PARAM_${SINGLE})
+    endforeach(SINGLE)
+
+    foreach(MULTI IN LISTS MULTIS)
+        if (PARAM_${MULTI})
+            # Replace our special marker with the name of the MULTI again. This
+            # restores for example multiple COMMANDs again.
+            string(REPLACE ":::" "${MULTI}" PARAM_${MULTI} "${PARAM_${MULTI}}")
+            list(APPEND NEW_COMMAND_LINE "${PARAM_${MULTI}}")
+        endif (PARAM_${MULTI})
+    endforeach(MULTI)
+endmacro()
+
+# Generated files can be older than their dependencies, causing useless
+# regenerations. This function replaces each file in OUTPUT with a .timestamp
+# file, adds a command to touch it and move the original file in BYPRODUCTS,
+# before calling add_custom_command().
+#
+# Note: Any add_custom_target() depending on files in original OUTPUT must use
+# add_custom_target_timestamp() instead to have the correct dependencies.
+#
+# add_custom_command_timestamp(OUTPUT output1 [output2 ...]
+#                       COMMAND command1 [ARGS] [args1...]
+#                       [COMMAND command2 [ARGS] [args2...] ...]
+#                       [MAIN_DEPENDENCY depend]
+#                       [DEPENDS [depends...]]
+#                       [BYPRODUCTS [files...]]
+#                       [IMPLICIT_DEPENDS <lang1> depend1
+#                                         [<lang2> depend2] ...]
+#                       [WORKING_DIRECTORY dir]
+#                       [COMMENT comment]
+#                       [VERBATIM] [APPEND] [USES_TERMINAL])
+function(add_custom_command_timestamp)
+    set(OPTIONS VERBATIM APPEND USES_TERMINAL)
+    set(SINGLES MAIN_DEPENDENCY WORKING_DIRECTORY COMMENT)
+    set(MULTIS OUTPUT COMMAND DEPENDS BYPRODUCTS IMPLICIT_DEPENDS)
+
+    _parse_arguments_with_multi_hack("${ARGN}")
+
+    # Create a list of all the OUTPUTs (by removing our magic marker)
+    string(REPLACE ":::;" "" OUTPUTS "${PARAM_OUTPUT}")
+
+    # Reset the OUTPUT and BYPRODUCTS as an empty list (if needed).
+    # Because they are MULTIS, we need to add our special marker here.
+    set(PARAM_OUTPUT ":::")
+    if (NOT PARAM_BYPRODUCTS)
+        set(PARAM_BYPRODUCTS ":::")
+    endif ()
+
+    foreach(OUTPUT IN LISTS OUTPUTS)
+        # For every output, we add a 'cmake -E touch' entry to update the
+        # timestamp on each run.
+        get_filename_component(OUTPUT_FILENAME ${OUTPUT} NAME)
+        string(APPEND PARAM_COMMAND ";:::;${CMAKE_COMMAND};-E;touch;${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_FILENAME}.timestamp")
+
+        # We change the OUTPUT to a '.timestamp' variant, and make the real
+        # output a byproduct.
+        list(APPEND PARAM_OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_FILENAME}.timestamp)
+        list(APPEND PARAM_BYPRODUCTS ${OUTPUT})
+
+        # Mark this file as being a byproduct; we use this again with
+        # add_custom_target_timestamp() to know if we should point to the
+        # '.timestamp' variant or not.
+        set_source_files_properties(${OUTPUT} PROPERTIES BYPRODUCT ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_FILENAME}.timestamp)
+    endforeach(OUTPUT)
+
+    # Reassemble and call the wrapped command
+    _reassemble_command_line()
+    add_custom_command(${NEW_COMMAND_LINE})
+endfunction(add_custom_command_timestamp)
+
+# Generated files can be older than their dependencies, causing useless
+# regenerations. This function adds a .timestamp file for each file in DEPENDS
+# replaced by add_custom_command_timestamp(), before calling add_custom_target().
+#
+# add_custom_target_timestamp(Name [ALL] [command1 [args1...]]
+#                      [COMMAND command2 [args2...] ...]
+#                      [DEPENDS depend depend depend ... ]
+#                      [BYPRODUCTS [files...]]
+#                      [WORKING_DIRECTORY dir]
+#                      [COMMENT comment]
+#                      [VERBATIM] [USES_TERMINAL]
+#                      [SOURCES src1 [src2...]])
+function(add_custom_target_timestamp)
+    set(OPTIONS VERBATIM USES_TERMINAL)
+    set(SINGLES WORKING_DIRECTORY COMMENT)
+    set(MULTIS COMMAND DEPENDS BYPRODUCTS SOURCES)
+    # ALL is missing, as the order is important here. It will be picked up
+    # by ${PARAM_UNPARSED_ARGUMENTS} when reassembling the command line.
+
+    _parse_arguments_with_multi_hack("${ARGN}")
+
+    # Create a list of all the DEPENDs (by removing our magic marker)
+    string(REPLACE ":::;" "" DEPENDS "${PARAM_DEPENDS}")
+
+    # Reset the DEPEND as an empty list.
+    # Because it is a MULTI, we need to add our special marker here.
+    set(PARAM_DEPENDS ":::")
+
+    foreach(DEPEND IN LISTS DEPENDS)
+        # Check if the output is produced by add_custom_command_timestamp()
+        get_source_file_property(BYPRODUCT ${DEPEND} BYPRODUCT)
+
+        if (BYPRODUCT STREQUAL "NOTFOUND")
+            # If it is not, just keep it as DEPEND
+            list(APPEND PARAM_DEPENDS "${DEPEND}")
+        else (BYPRODUCT STREQUAL "NOTFOUND")
+            # If it is, the BYPRODUCT property points to the timestamp we want to depend on
+            list(APPEND PARAM_DEPENDS "${BYPRODUCT}")
+        endif (BYPRODUCT STREQUAL "NOTFOUND")
+    endforeach(DEPEND)
+
+    # Reassemble and call the wrapped command
+    _reassemble_command_line()
+    add_custom_target(${NEW_COMMAND_LINE})
+endfunction(add_custom_target_timestamp)
diff --git a/cmake/CompileFlags.cmake b/cmake/CompileFlags.cmake
new file mode 100644
index 000000000..05c19abab
--- /dev/null
+++ b/cmake/CompileFlags.cmake
@@ -0,0 +1,120 @@
+# Macro which contains all bits to setup the compile flags correctly.
+#
+# compile_flags()
+#
+macro(compile_flags)
+    if (MSVC)
+        # Switch to MT (static) instead of MD (dynamic) binary
+
+        # For MSVC two generators are available
+        # - a command line generator (Ninja) using CMAKE_BUILD_TYPE to specify the
+        #   configuration of the build tree
+        # - an IDE generator (Visual Studio) using CMAKE_CONFIGURATION_TYPES to
+        #   specify all configurations that will be available in the generated solution
+        list(APPEND MSVC_CONFIGS "${CMAKE_BUILD_TYPE}" "${CMAKE_CONFIGURATION_TYPES}")
+
+        # Set usage of static runtime for all configurations
+        foreach(MSVC_CONFIG ${MSVC_CONFIGS})
+            string(TOUPPER "CMAKE_CXX_FLAGS_${MSVC_CONFIG}" MSVC_FLAGS)
+            string(REPLACE "/MD" "/MT" ${MSVC_FLAGS} "${${MSVC_FLAGS}}")
+        endforeach()
+
+        # "If /Zc:rvalueCast is specified, the compiler follows section 5.4 of the
+        # C++11 standard". We need C++11 for the way we use threads.
+        add_compile_options(/Zc:rvalueCast)
+
+        # Add DPI manifest to project; other WIN32 targets get this via ottdres.rc
+        list(APPEND GENERATED_SOURCE_FILES "${CMAKE_SOURCE_DIR}/os/windows/openttd.manifest")
+    endif (MSVC)
+
+    # Add some -D flags for Debug builds. We cannot use add_definitions(), because
+    # it does not appear to support the $<> tags.
+    add_compile_options(
+        "$<$<CONFIG:Debug>:-D_DEBUG>"
+        "$<$<CONFIG:Debug>:-D_FORTIFY_SOURCE=2>"
+    )
+
+    # Prepare a generator that checks if we are not a debug, and don't have asserts
+    # on. We need this later on to set some compile options for stable releases.
+    set(IS_STABLE_RELEASE "$<AND:$<NOT:$<CONFIG:Debug>>,$<NOT:$<BOOL:${OPTION_USE_ASSERTS}>>>")
+
+    if (MSVC)
+        add_compile_options(/W3)
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
+        add_compile_options(
+            -W
+            -Wall
+            -Wcast-qual
+            -Wextra
+            -Wsign-compare
+            -Wundef
+            -Wpointer-arith
+            -Wwrite-strings
+            -Wredundant-decls
+            -Wformat-security
+            -Wformat=2
+            -Winit-self
+            -Wnon-virtual-dtor
+
+            # Often parameters are unused, which is fine.
+            -Wno-unused-parameter
+            # We use 'ABCD' multichar for SaveLoad chunks identifiers
+            -Wno-multichar
+
+            # Compilers complains about that we break strict-aliasing.
+            #  On most places we don't see how to fix it, and it doesn't
+            #  break anything. So disable strict-aliasing to make the
+            #  compiler all happy.
+            -fno-strict-aliasing
+        )
+
+        add_compile_options(
+            # When we are a stable release (Release build + USE_ASSERTS not set),
+            # assertations are off, which trigger a lot of warnings. We disable
+            # these warnings for these releases.
+            "$<${IS_STABLE_RELEASE}:-Wno-unused-variable>"
+            "$<${IS_STABLE_RELEASE}:-Wno-unused-but-set-parameter>"
+            "$<${IS_STABLE_RELEASE}:-Wno-unused-but-set-variable>"
+        )
+
+        if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+            include(CheckCXXCompilerFlag)
+            check_cxx_compiler_flag("-flifetime-dse=1" LIFETIME_DSE_FOUND)
+
+            add_compile_options(
+                # GCC 4.2+ automatically assumes that signed overflows do
+                # not occur in signed arithmetics, whereas we are not
+                # sure that they will not happen. It furthermore complains
+                # about its own optimized code in some places.
+                "-fno-strict-overflow"
+
+                # Prevent optimisation supposing enums are in a range specified by the standard
+                # For details, see http://gcc.gnu.org/PR43680
+                "-fno-tree-vrp"
+
+                # -flifetime-dse=2 (default since GCC 6) doesn't play
+                # well with our custom pool item allocator
+                "$<$<BOOL:${LIFETIME_DSE_FOUND}>:-flifetime-dse=1>"
+            )
+        endif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+        add_compile_options(
+            -Wall
+            # warning #873: function ... ::operator new ... has no corresponding operator delete ...
+            -wd873
+            # warning #1292: unknown attribute "fallthrough"
+            -wd1292
+            # warning #1899: multicharacter character literal (potential portability problem)
+            -wd1899
+            # warning #2160: anonymous union qualifier is ignored
+            -wd2160
+        )
+    else ()
+        message(FATAL_ERROR "No warning flags are set for this compiler yet; please consider creating a Pull Request to add support for this compiler.")
+    endif ()
+
+    if (NOT WIN32)
+        # rdynamic is used to get useful stack traces from crash reports.
+        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -rdynamic")
+    endif (NOT WIN32)
+endmacro()
diff --git a/cmake/CreateGrfCommand.cmake b/cmake/CreateGrfCommand.cmake
new file mode 100644
index 000000000..25e599f56
--- /dev/null
+++ b/cmake/CreateGrfCommand.cmake
@@ -0,0 +1,50 @@
+# Macro which contains all bits and pieces to create a single grf file based
+# on NFO and PNG files.
+#
+# create_grf_command()
+#
+function(create_grf_command)
+    set(EXTRA_PNG_SOURCE_FILES ${ARGV})
+
+    get_filename_component(GRF_SOURCE_FOLDER_NAME "${CMAKE_CURRENT_SOURCE_DIR}" NAME)
+    get_filename_component(GRF_BINARY_FILE ${CMAKE_CURRENT_SOURCE_DIR}/../${GRF_SOURCE_FOLDER_NAME}.grf ABSOLUTE)
+    file(GLOB_RECURSE GRF_PNG_SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/*.png)
+    file(GLOB_RECURSE GRF_NFO_SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/*.nfo)
+    set(GRF_PNG_SOURCE_FILES ${GRF_PNG_SOURCE_FILES} ${EXTRA_PNG_SOURCE_FILES})
+
+    # Copy over all the PNG files to the correct folder
+    foreach(GRF_PNG_SOURCE_FILE IN LISTS GRF_PNG_SOURCE_FILES)
+        get_filename_component(GRF_PNG_SOURCE_FILE_NAME "${GRF_PNG_SOURCE_FILE}" NAME)
+        set(GRF_PNG_BINARY_FILE "${CMAKE_CURRENT_BINARY_DIR}/sprites/${GRF_PNG_SOURCE_FILE_NAME}")
+
+        add_custom_command(OUTPUT ${GRF_PNG_BINARY_FILE}
+                COMMAND ${CMAKE_COMMAND} -E copy
+                        ${GRF_PNG_SOURCE_FILE}
+                        ${GRF_PNG_BINARY_FILE}
+                MAIN_DEPENDENCY ${GRF_PNG_SOURCE_FILE}
+                COMMENT "Copying ${GRF_PNG_SOURCE_FILE_NAME} sprite file"
+        )
+
+        list(APPEND GRF_PNG_BINARY_FILES ${GRF_PNG_BINARY_FILE})
+    endforeach(GRF_PNG_SOURCE_FILE)
+
+    add_custom_command(OUTPUT ${GRF_BINARY_FILE}
+            COMMAND ${CMAKE_COMMAND}
+                    -DGRF_SOURCE_FOLDER=${CMAKE_CURRENT_SOURCE_DIR}
+                    -DGRF_BINARY_FILE=${GRF_BINARY_FILE}
+                    -DNFORENUM_EXECUTABLE=${NFORENUM_EXECUTABLE}
+                    -DGRFCODEC_EXECUTABLE=${GRFCODEC_EXECUTABLE}
+                    -P ${CMAKE_SOURCE_DIR}/cmake/scripts/CreateGRF.cmake
+            MAIN_DEPENDENCY ${GRF_NFO_SOURCE_FILES}
+            DEPENDS ${GRF_PNG_BINARY_FILES}
+                    ${CMAKE_SOURCE_DIR}/cmake/scripts/CreateGRF.cmake
+            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+            COMMENT "Generating ${GRF_SOURCE_FOLDER_NAME}.grf"
+    )
+
+    # For conviance, if you want to only test building the GRF
+    add_custom_target(${GRF_SOURCE_FOLDER_NAME}.grf
+            DEPENDS
+            ${GRF_BINARY_FILE}
+    )
+endfunction()
diff --git a/cmake/CreateRegression.cmake b/cmake/CreateRegression.cmake
new file mode 100644
index 000000000..443332368
--- /dev/null
+++ b/cmake/CreateRegression.cmake
@@ -0,0 +1,86 @@
+# Macro which contains all bits and pieces to create the regression tests.
+# This creates both a standalone target 'regression', and it integrates with
+# 'ctest'. The first is prefered, as it is more verbose, and takes care of
+# dependencies correctly.
+#
+# create_regression()
+#
+macro(create_regression)
+    # Find all the files in the regression folder; they need to be copied to the
+    # build folder before we can run the regression
+    file(GLOB_RECURSE REGRESSION_SOURCE_FILES ${CMAKE_SOURCE_DIR}/regression/*)
+    foreach(REGRESSION_SOURCE_FILE IN LISTS REGRESSION_SOURCE_FILES)
+        string(REGEX REPLACE "^${CMAKE_SOURCE_DIR}/regression/" "${CMAKE_BINARY_DIR}/ai/" REGRESSION_BINARY_FILE "${REGRESSION_SOURCE_FILE}")
+        string(REGEX REPLACE "^${CMAKE_SOURCE_DIR}/regression/" "" REGRESSION_SOURCE_FILE_NAME "${REGRESSION_SOURCE_FILE}")
+
+        if ("${REGRESSION_SOURCE_FILE_NAME}" STREQUAL "regression.cfg")
+            continue()
+        endif ("${REGRESSION_SOURCE_FILE_NAME}" STREQUAL "regression.cfg")
+
+        add_custom_command(OUTPUT ${REGRESSION_BINARY_FILE}
+                COMMAND ${CMAKE_COMMAND} -E copy
+                        ${REGRESSION_SOURCE_FILE}
+                        ${REGRESSION_BINARY_FILE}
+                MAIN_DEPENDENCY ${REGRESSION_SOURCE_FILE}
+                COMMENT "Copying ${REGRESSION_SOURCE_FILE_NAME} regression file"
+        )
+
+        list(APPEND REGRESSION_BINARY_FILES ${REGRESSION_BINARY_FILE})
+    endforeach(REGRESSION_SOURCE_FILE)
+
+    # Copy the regression configuration in a special folder, so all autogenerated
+    # folders end up in the same place after running regression.
+    add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/regression/regression.cfg
+            COMMAND ${CMAKE_COMMAND} -E copy
+                    ${CMAKE_SOURCE_DIR}/regression/regression.cfg
+                    ${CMAKE_BINARY_DIR}/regression/regression.cfg
+            MAIN_DEPENDENCY ${CMAKE_SOURCE_DIR}/regression/regression.cfg
+            COMMENT "Copying ${REGRESSION_SOURCE_FILE_NAME} regression file"
+    )
+    list(APPEND REGRESSION_BINARY_FILES ${CMAKE_BINARY_DIR}/regression/regression.cfg)
+
+    # Create a new target which copies all regression files
+    add_custom_target(regression_files
+            ALL  # this is needed because 'make test' doesn't resolve dependencies, and otherwise this is never executed
+            DEPENDS
+            ${REGRESSION_BINARY_FILES}
+    )
+
+    enable_testing()
+
+    # Find all the tests we have, and create a target for them
+    file(GLOB REGRESSION_TESTS ${CMAKE_SOURCE_DIR}/regression/*)
+    foreach(REGRESSION_TEST IN LISTS REGRESSION_TESTS)
+        get_filename_component(REGRESSION_TEST_NAME "${REGRESSION_TEST}" NAME)
+
+        if ("${REGRESSION_TEST_NAME}" STREQUAL "regression.cfg")
+            continue()
+        endif ("${REGRESSION_TEST_NAME}" STREQUAL "regression.cfg")
+
+        add_custom_target(regression_${REGRESSION_TEST_NAME}
+                COMMAND ${CMAKE_COMMAND}
+                        -DOPENTTD_EXECUTABLE=$<TARGET_FILE:openttd>
+                        -DEDITBIN_EXECUTABLE=${EDITBIN_EXECUTABLE}
+                        -DREGRESSION_TEST=${REGRESSION_TEST_NAME}
+                        -P "${CMAKE_SOURCE_DIR}/cmake/scripts/Regression.cmake"
+                DEPENDS openttd regression_files
+                WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
+                COMMENT "Running regression test ${REGRESSION_TEST_NAME}"
+                )
+
+        # Also make sure that 'make test' runs the regression
+        add_test(NAME regression_${REGRESSION_TEST_NAME}
+                COMMAND ${CMAKE_COMMAND}
+                        -DOPENTTD_EXECUTABLE=$<TARGET_FILE:openttd>
+                        -DEDITBIN_EXECUTABLE=${EDITBIN_EXECUTABLE}
+                        -DREGRESSION_TEST=${REGRESSION_TEST_NAME}
+                        -P "${CMAKE_SOURCE_DIR}/cmake/scripts/Regression.cmake"
+                WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
+
+        list(APPEND REGRESSION_TARGETS regression_${REGRESSION_TEST_NAME})
+    endforeach(REGRESSION_TEST)
+
+    # Create a new target which runs the regression
+    add_custom_target(regression
+            DEPENDS ${REGRESSION_TARGETS})
+endmacro()
diff --git a/cmake/Endian.cmake b/cmake/Endian.cmake
new file mode 100644
index 000000000..00cb97544
--- /dev/null
+++ b/cmake/Endian.cmake
@@ -0,0 +1,14 @@
+# Add the definitions to indicate which endian we are building for.
+#
+# add_endian_definition()
+#
+function(add_endian_definition)
+    include(TestBigEndian)
+    TEST_BIG_ENDIAN(IS_BIG_ENDIAN)
+
+    if (IS_BIG_ENDIAN)
+        add_definitions(-DTTD_ENDIAN=TTD_BIG_ENDIAN)
+    else (IS_BIG_ENDIAN)
+        add_definitions(-DTTD_ENDIAN=TTD_LITTLE_ENDIAN)
+    endif (IS_BIG_ENDIAN)
+endfunction()
diff --git a/cmake/FindAllegro.cmake b/cmake/FindAllegro.cmake
new file mode 100644
index 000000000..85b2ffd39
--- /dev/null
+++ b/cmake/FindAllegro.cmake
@@ -0,0 +1,65 @@
+#[=======================================================================[.rst:
+FindAllegro
+-------
+
+Finds the allegro library.
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This will define the following variables:
+
+``Allegro_FOUND``
+  True if the system has the allegro library.
+``Allegro_INCLUDE_DIRS``
+  Include directories needed to use allegro.
+``Allegro_LIBRARIES``
+  Libraries needed to link to allegro.
+``Allegro_VERSION``
+  The version of the allegro library which was found.
+
+Cache Variables
+^^^^^^^^^^^^^^^
+
+The following cache variables may also be set:
+
+``Allegro_INCLUDE_DIR``
+  The directory containing ``allegro.h``.
+``Allegro_LIBRARY``
+  The path to the allegro library.
+
+#]=======================================================================]
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_Allegro QUIET allegro)
+
+find_path(Allegro_INCLUDE_DIR
+    NAMES allegro.h
+    PATHS ${PC_Allegro_INCLUDE_DIRS}
+)
+
+find_library(Allegro_LIBRARY
+    NAMES alleg
+    PATHS ${PC_Allegro_LIBRARY_DIRS}
+)
+
+set(Allegro_VERSION ${PC_Allegro_VERSION})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Allegro
+    FOUND_VAR Allegro_FOUND
+    REQUIRED_VARS
+        Allegro_LIBRARY
+        Allegro_INCLUDE_DIR
+    VERSION_VAR Allegro_VERSION
+)
+
+if (Allegro_FOUND)
+    set(Allegro_LIBRARIES ${Allegro_LIBRARY})
+    set(Allegro_INCLUDE_DIRS ${Allegro_INCLUDE_DIR})
+endif ()
+
+mark_as_advanced(
+    Allegro_INCLUDE_DIR
+    Allegro_LIBRARY
+)
diff --git a/cmake/FindEditbin.cmake b/cmake/FindEditbin.cmake
new file mode 100644
index 000000000..363bc0053
--- /dev/null
+++ b/cmake/FindEditbin.cmake
@@ -0,0 +1,13 @@
+# Autodetect editbin. Only useful for MSVC.
+
+get_filename_component(MSVC_COMPILE_DIRECTORY ${CMAKE_CXX_COMPILER} DIRECTORY)
+find_program(
+    EDITBIN_EXECUTABLE editbin.exe
+    HINTS ${MSVC_COMPILE_DIRECTORY}
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Editbin
+    FOUND_VAR EDITBIN_FOUND
+    REQUIRED_VARS EDITBIN_EXECUTABLE
+)
diff --git a/cmake/FindFluidsynth.cmake b/cmake/FindFluidsynth.cmake
new file mode 100644
index 000000000..063726dbe
--- /dev/null
+++ b/cmake/FindFluidsynth.cmake
@@ -0,0 +1,65 @@
+#[=======================================================================[.rst:
+FindFluidsynth
+-------
+
+Finds the fluidsynth library.
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This will define the following variables:
+
+``Fluidsynth_FOUND``
+  True if the system has the fluidsynth library.
+``Fluidsynth_INCLUDE_DIRS``
+  Include directories needed to use fluidsynth.
+``Fluidsynth_LIBRARIES``
+  Libraries needed to link to fluidsynth.
+``Fluidsynth_VERSION``
+  The version of the fluidsynth library which was found.
+
+Cache Variables
+^^^^^^^^^^^^^^^
+
+The following cache variables may also be set:
+
+``Fluidsynth_INCLUDE_DIR``
+  The directory containing ``fluidsynth.h``.
+``Fluidsynth_LIBRARY``
+  The path to the fluidsynth library.
+
+#]=======================================================================]
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_Fluidsynth QUIET fluidsynth)
+
+find_path(Fluidsynth_INCLUDE_DIR
+    NAMES fluidsynth.h
+    PATHS ${PC_Fluidsynth_INCLUDE_DIRS}
+)
+
+find_library(Fluidsynth_LIBRARY
+    NAMES fluidsynth
+    PATHS ${PC_Fluidsynth_LIBRARY_DIRS}
+)
+
+set(Fluidsynth_VERSION ${PC_Fluidsynth_VERSION})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Fluidsynth
+    FOUND_VAR Fluidsynth_FOUND
+    REQUIRED_VARS
+        Fluidsynth_LIBRARY
+        Fluidsynth_INCLUDE_DIR
+    VERSION_VAR Fluidsynth_VERSION
+)
+
+if (Fluidsynth_FOUND)
+    set(Fluidsynth_LIBRARIES ${Fluidsynth_LIBRARY})
+    set(Fluidsynth_INCLUDE_DIRS ${Fluidsynth_INCLUDE_DIR})
+endif ()
+
+mark_as_advanced(
+    Fluidsynth_INCLUDE_DIR
+    Fluidsynth_LIBRARY
+)
diff --git a/cmake/FindFontconfig.cmake b/cmake/FindFontconfig.cmake
new file mode 100644
index 000000000..a6f0180b3
--- /dev/null
+++ b/cmake/FindFontconfig.cmake
@@ -0,0 +1,101 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+FindFontconfig
+--------------
+
+Find Fontconfig headers and library.
+
+Imported Targets
+^^^^^^^^^^^^^^^^
+
+``Fontconfig::Fontconfig``
+  The Fontconfig library, if found.
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This will define the following variables in your project:
+
+``Fontconfig_FOUND``
+  true if (the requested version of) Fontconfig is available.
+``Fontconfig_VERSION``
+  the version of Fontconfig.
+``Fontconfig_LIBRARIES``
+  the libraries to link against to use Fontconfig.
+``Fontconfig_INCLUDE_DIRS``
+  where to find the Fontconfig headers.
+``Fontconfig_COMPILE_OPTIONS``
+  this should be passed to target_compile_options(), if the
+  target is not used for linking
+
+#]=======================================================================]
+
+
+# use pkg-config to get the directories and then use these values
+# in the FIND_PATH() and FIND_LIBRARY() calls
+find_package(PkgConfig QUIET)
+pkg_check_modules(PKG_FONTCONFIG QUIET fontconfig)
+set(Fontconfig_COMPILE_OPTIONS ${PKG_FONTCONFIG_CFLAGS_OTHER})
+set(Fontconfig_VERSION ${PKG_FONTCONFIG_VERSION})
+
+find_path( Fontconfig_INCLUDE_DIR
+  NAMES
+    fontconfig/fontconfig.h
+  HINTS
+    ${PKG_FONTCONFIG_INCLUDE_DIRS}
+    /usr/X11/include
+)
+
+find_library( Fontconfig_LIBRARY
+  NAMES
+    fontconfig
+  PATHS
+    ${PKG_FONTCONFIG_LIBRARY_DIRS}
+)
+
+if (Fontconfig_INCLUDE_DIR AND NOT Fontconfig_VERSION)
+  file(STRINGS ${Fontconfig_INCLUDE_DIR}/fontconfig/fontconfig.h _contents REGEX "^#define[ \t]+FC_[A-Z]+[ \t]+[0-9]+$")
+  unset(Fontconfig_VERSION)
+  foreach(VPART MAJOR MINOR REVISION)
+    foreach(VLINE ${_contents})
+      if(VLINE MATCHES "^#define[\t ]+FC_${VPART}[\t ]+([0-9]+)$")
+        set(Fontconfig_VERSION_PART "${CMAKE_MATCH_1}")
+        if(Fontconfig_VERSION)
+          string(APPEND Fontconfig_VERSION ".${Fontconfig_VERSION_PART}")
+        else()
+          set(Fontconfig_VERSION "${Fontconfig_VERSION_PART}")
+        endif()
+      endif()
+    endforeach()
+  endforeach()
+endif ()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Fontconfig
+  FOUND_VAR
+    Fontconfig_FOUND
+  REQUIRED_VARS
+    Fontconfig_LIBRARY
+    Fontconfig_INCLUDE_DIR
+  VERSION_VAR
+    Fontconfig_VERSION
+)
+
+
+if(Fontconfig_FOUND AND NOT TARGET Fontconfig::Fontconfig)
+  add_library(Fontconfig::Fontconfig UNKNOWN IMPORTED)
+  set_target_properties(Fontconfig::Fontconfig PROPERTIES
+    IMPORTED_LOCATION "${Fontconfig_LIBRARY}"
+    INTERFACE_COMPILE_OPTIONS "${Fontconfig_COMPILE_OPTIONS}"
+    INTERFACE_INCLUDE_DIRECTORIES "${Fontconfig_INCLUDE_DIR}"
+  )
+endif()
+
+mark_as_advanced(Fontconfig_LIBRARY Fontconfig_INCLUDE_DIR)
+
+if(Fontconfig_FOUND)
+  set(Fontconfig_LIBRARIES ${Fontconfig_LIBRARY})
+  set(Fontconfig_INCLUDE_DIRS ${Fontconfig_INCLUDE_DIR})
+endif()
diff --git a/cmake/FindGrfcodec.cmake b/cmake/FindGrfcodec.cmake
new file mode 100644
index 000000000..089f95670
--- /dev/null
+++ b/cmake/FindGrfcodec.cmake
@@ -0,0 +1,13 @@
+# Autodetect grfcodec and nforenum.
+#
+
+find_program(GRFCODEC_EXECUTABLE grfcodec)
+find_program(NFORENUM_EXECUTABLE nforenum)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Grfcodec
+    FOUND_VAR GRFCODEC_FOUND
+    REQUIRED_VARS
+        GRFCODEC_EXECUTABLE
+        NFORENUM_EXECUTABLE
+)
diff --git a/cmake/FindICU.cmake b/cmake/FindICU.cmake
new file mode 100644
index 000000000..471e43c1d
--- /dev/null
+++ b/cmake/FindICU.cmake
@@ -0,0 +1,64 @@
+#[=======================================================================[.rst:
+FindICU
+-------
+
+Finds components of the ICU library.
+
+Accepted components are: uc, i18n, le, lx, io
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This will define the following variables:
+
+``ICU_FOUND``
+  True if components of ICU library are found.
+``ICU_VERSION``
+  The version of the ICU library which was found.
+``ICU_<c>_FOUND``
+  True if the system has the <c> component of ICU library.
+``ICU_<c>_INCLUDE_DIRS``
+  Include directories needed to use the <c> component of ICU library.
+``ICU_<c>_LIBRARIES``
+  Libraries needed to link to the <c> component of ICU library.
+
+#]=======================================================================]
+
+find_package(PkgConfig QUIET)
+
+set(ICU_KNOWN_COMPONENTS "uc" "i18n" "le" "lx" "io")
+
+foreach(MOD_NAME IN LISTS ICU_FIND_COMPONENTS)
+    if (NOT MOD_NAME IN_LIST ICU_KNOWN_COMPONENTS)
+        message(FATAL_ERROR "Unknown ICU component: ${MOD_NAME}")
+    endif()
+    pkg_check_modules(PC_ICU_${MOD_NAME} QUIET icu-${MOD_NAME})
+
+    # Check the libraries returned by pkg-config really exist.
+    unset(PC_LIBRARIES)
+    foreach(LIBRARY IN LISTS PC_ICU_${MOD_NAME}_LIBRARIES)
+        unset(PC_LIBRARY CACHE)
+        find_library(PC_LIBRARY NAMES ${LIBRARY})
+        if (NOT PC_LIBRARY)
+            unset(PC_ICU_${MOD_NAME}_FOUND)
+        endif()
+        list(APPEND PC_LIBRARIES ${PC_LIBRARY})
+    endforeach()
+    unset(PC_LIBRARY CACHE)
+
+    if (${PC_ICU_${MOD_NAME}_FOUND})
+        set(ICU_COMPONENT_FOUND TRUE)
+        set(ICU_${MOD_NAME}_FOUND TRUE)
+        set(ICU_${MOD_NAME}_LIBRARIES ${PC_LIBRARIES})
+        set(ICU_${MOD_NAME}_INCLUDE_DIRS ${PC_ICU_${MOD_NAME}_INCLUDE_DIRS})
+        set(ICU_VERSION ${PC_ICU_${MOD_NAME}_VERSION})
+    endif()
+endforeach()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(ICU
+    FOUND_VAR ICU_FOUND
+    REQUIRED_VARS ICU_COMPONENT_FOUND
+    VERSION_VAR ICU_VERSION
+    HANDLE_COMPONENTS
+)
diff --git a/cmake/FindIconv.cmake b/cmake/FindIconv.cmake
new file mode 100644
index 000000000..5185601ab
--- /dev/null
+++ b/cmake/FindIconv.cmake
@@ -0,0 +1,133 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+#[=======================================================================[.rst:
+FindIconv
+---------
+
+This module finds the ``iconv()`` POSIX.1 functions on the system.
+These functions might be provided in the regular C library or externally
+in the form of an additional library.
+
+The following variables are provided to indicate iconv support:
+
+.. variable:: Iconv_FOUND
+
+  Variable indicating if the iconv support was found.
+
+.. variable:: Iconv_INCLUDE_DIRS
+
+  The directories containing the iconv headers.
+
+.. variable:: Iconv_LIBRARIES
+
+  The iconv libraries to be linked.
+
+.. variable:: Iconv_IS_BUILT_IN
+
+  A variable indicating whether iconv support is stemming from the
+  C library or not. Even if the C library provides `iconv()`, the presence of
+  an external `libiconv` implementation might lead to this being false.
+
+Additionally, the following :prop_tgt:`IMPORTED` target is being provided:
+
+.. variable:: Iconv::Iconv
+
+  Imported target for using iconv.
+
+The following cache variables may also be set:
+
+.. variable:: Iconv_INCLUDE_DIR
+
+  The directory containing the iconv headers.
+
+.. variable:: Iconv_LIBRARY
+
+  The iconv library (if not implicitly given in the C library).
+
+.. note::
+  On POSIX platforms, iconv might be part of the C library and the cache
+  variables ``Iconv_INCLUDE_DIR`` and ``Iconv_LIBRARY`` might be empty.
+
+#]=======================================================================]
+
+include(CMakePushCheckState)
+if(CMAKE_C_COMPILER_LOADED)
+  include(CheckCSourceCompiles)
+elseif(CMAKE_CXX_COMPILER_LOADED)
+  include(CheckCXXSourceCompiles)
+else()
+  # If neither C nor CXX are loaded, implicit iconv makes no sense.
+  set(Iconv_IS_BUILT_IN FALSE)
+endif()
+
+# iconv can only be provided in libc on a POSIX system.
+# If any cache variable is already set, we'll skip this test.
+if(NOT DEFINED Iconv_IS_BUILT_IN)
+  if(UNIX AND NOT DEFINED Iconv_INCLUDE_DIR AND NOT DEFINED Iconv_LIBRARY)
+    cmake_push_check_state(RESET)
+    # We always suppress the message here: Otherwise on supported systems
+    # not having iconv in their C library (e.g. those using libiconv)
+    # would always display a confusing "Looking for iconv - not found" message
+    set(CMAKE_FIND_QUIETLY TRUE)
+    # The following code will not work, but it's sufficient to see if it compiles.
+    # Note: libiconv will define the iconv functions as macros, so CheckSymbolExists
+    # will not yield correct results.
+    set(Iconv_IMPLICIT_TEST_CODE
+      "
+      #include <stddef.h>
+      #include <iconv.h>
+      int main() {
+        char *a, *b;
+        size_t i, j;
+        iconv_t ic;
+        ic = iconv_open(\"to\", \"from\");
+        iconv(ic, &a, &i, &b, &j);
+        iconv_close(ic);
+      }
+      "
+    )
+    if(CMAKE_C_COMPILER_LOADED)
+      check_c_source_compiles("${Iconv_IMPLICIT_TEST_CODE}" Iconv_IS_BUILT_IN)
+    else()
+      check_cxx_source_compiles("${Iconv_IMPLICIT_TEST_CODE}" Iconv_IS_BUILT_IN)
+    endif()
+    cmake_pop_check_state()
+  else()
+    set(Iconv_IS_BUILT_IN FALSE)
+  endif()
+endif()
+
+if(NOT Iconv_IS_BUILT_IN)
+  find_path(Iconv_INCLUDE_DIR
+    NAMES "iconv.h"
+    DOC "iconv include directory")
+  set(Iconv_LIBRARY_NAMES "iconv" "libiconv")
+else()
+  set(Iconv_INCLUDE_DIR "" CACHE FILEPATH "iconv include directory")
+  set(Iconv_LIBRARY_NAMES "c")
+endif()
+
+find_library(Iconv_LIBRARY
+  NAMES ${Iconv_LIBRARY_NAMES}
+  DOC "iconv library (potentially the C library)")
+
+mark_as_advanced(Iconv_INCLUDE_DIR)
+mark_as_advanced(Iconv_LIBRARY)
+
+include(FindPackageHandleStandardArgs)
+if(NOT Iconv_IS_BUILT_IN)
+  find_package_handle_standard_args(Iconv REQUIRED_VARS Iconv_LIBRARY Iconv_INCLUDE_DIR)
+else()
+  find_package_handle_standard_args(Iconv REQUIRED_VARS Iconv_LIBRARY)
+endif()
+
+if(Iconv_FOUND)
+  set(Iconv_INCLUDE_DIRS "${Iconv_INCLUDE_DIR}")
+  set(Iconv_LIBRARIES "${Iconv_LIBRARY}")
+  if(NOT TARGET Iconv::Iconv)
+    add_library(Iconv::Iconv INTERFACE IMPORTED)
+  endif()
+  set_property(TARGET Iconv::Iconv PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${Iconv_INCLUDE_DIRS}")
+  set_property(TARGET Iconv::Iconv PROPERTY INTERFACE_LINK_LIBRARIES "${Iconv_LIBRARIES}")
+endif()
diff --git a/cmake/FindLZO.cmake b/cmake/FindLZO.cmake
new file mode 100644
index 000000000..9a409002d
--- /dev/null
+++ b/cmake/FindLZO.cmake
@@ -0,0 +1,89 @@
+#[=======================================================================[.rst:
+FindLZO
+-------
+
+Finds the LZO library.
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This will define the following variables:
+
+``LZO_FOUND``
+  True if the system has the LZO library.
+``LZO_INCLUDE_DIRS``
+  Include directories needed to use LZO.
+``LZO_LIBRARIES``
+  Libraries needed to link to LZO.
+``LZO_VERSION``
+  The version of the LZO library which was found.
+
+Cache Variables
+^^^^^^^^^^^^^^^
+
+The following cache variables may also be set:
+
+``LZO_INCLUDE_DIR``
+  The directory containing ``lzo/lzo1x.h``.
+``LZO_LIBRARY``
+  The path to the LZO library.
+
+#]=======================================================================]
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_LZO QUIET lzo2)
+
+find_path(LZO_INCLUDE_DIR
+    NAMES lzo/lzo1x.h
+    PATHS ${PC_LZO_INCLUDE_DIRS}
+)
+
+find_library(LZO_LIBRARY
+    NAMES lzo2
+    PATHS ${PC_LZO_LIBRARY_DIRS}
+)
+
+# With vcpkg, the library path should contain both 'debug' and 'optimized'
+# entries (see target_link_libraries() documentation for more information)
+#
+# NOTE: we only patch up when using vcpkg; the same issue might happen
+# when not using vcpkg, but this is non-trivial to fix, as we have no idea
+# what the paths are. With vcpkg we do. And we only official support vcpkg
+# with Windows.
+#
+# NOTE: this is based on the assumption that the debug file has the same
+# name as the optimized file. This is not always the case, but so far
+# experiences has shown that in those case vcpkg CMake files do the right
+# thing.
+if (VCPKG_TOOLCHAIN AND LZO_LIBRARY)
+    if (LZO_LIBRARY MATCHES "/debug/")
+        set(LZO_LIBRARY_DEBUG ${LZO_LIBRARY})
+        string(REPLACE "/debug/lib/" "/lib/" LZO_LIBRARY_RELEASE ${LZO_LIBRARY})
+    else()
+        set(LZO_LIBRARY_RELEASE ${LZO_LIBRARY})
+        string(REPLACE "/lib/" "/debug/lib/" LZO_LIBRARY_DEBUG ${LZO_LIBRARY})
+    endif()
+    include(SelectLibraryConfigurations)
+    select_library_configurations(LZO)
+endif()
+
+set(LZO_VERSION ${PC_LZO_VERSION})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LZO
+    FOUND_VAR LZO_FOUND
+    REQUIRED_VARS
+        LZO_LIBRARY
+        LZO_INCLUDE_DIR
+    VERSION_VAR LZO_VERSION
+)
+
+if (LZO_FOUND)
+    set(LZO_LIBRARIES ${LZO_LIBRARY})
+    set(LZO_INCLUDE_DIRS ${LZO_INCLUDE_DIR})
+endif ()
+
+mark_as_advanced(
+    LZO_INCLUDE_DIR
+    LZO_LIBRARY
+)
diff --git a/cmake/FindSSE.cmake b/cmake/FindSSE.cmake
new file mode 100644
index 000000000..d0a57ccbb
--- /dev/null
+++ b/cmake/FindSSE.cmake
@@ -0,0 +1,17 @@
+# Autodetect if SSE4.1 can be used. If so, the assumption is, so can the other
+# SSE version (SSE 2.0, SSSE 3.0).
+
+include(CheckCXXSourceCompiles)
+set(CMAKE_REQUIRED_FLAGS "")
+
+if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
+    set(CMAKE_REQUIRED_FLAGS "-msse4.1")
+endif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
+
+check_cxx_source_compiles("
+    #include <xmmintrin.h>
+    #include <smmintrin.h>
+    #include <tmmintrin.h>
+    int main() { return 0; }"
+    SSE_FOUND
+)
diff --git a/cmake/FindXDG_basedir.cmake b/cmake/FindXDG_basedir.cmake
new file mode 100644
index 000000000..913b425e2
--- /dev/null
+++ b/cmake/FindXDG_basedir.cmake
@@ -0,0 +1,65 @@
+#[=======================================================================[.rst:
+FindXDG_basedir
+-------
+
+Finds the xdg-basedir library.
+
+Result Variables
+^^^^^^^^^^^^^^^^
+
+This will define the following variables:
+
+``XDG_basedir_FOUND``
+  True if the system has the xdg-basedir library.
+``XDG_basedir_INCLUDE_DIRS``
+  Include directories needed to use xdg-basedir.
+``XDG_basedir_LIBRARIES``
+  Libraries needed to link to xdg-basedir.
+``XDG_basedir_VERSION``
+  The version of the xdg-basedir library which was found.
+
+Cache Variables
+^^^^^^^^^^^^^^^
+
+The following cache variables may also be set:
+
+``XDG_basedir_INCLUDE_DIR``
+  The directory containing ``xdg-basedir.h``.
+``XDG_basedir_LIBRARY``
+  The path to the xdg-basedir library.
+
+#]=======================================================================]
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_XDG_basedir QUIET libxdg-basedir)
+
+find_path(XDG_basedir_INCLUDE_DIR
+    NAMES basedir.h
+    PATHS ${PC_XDG_basedir_INCLUDE_DIRS}
+)
+
+find_library(XDG_basedir_LIBRARY
+    NAMES xdg-basedir
+    PATHS ${PC_XDG_basedir_LIBRARY_DIRS}
+)
+
+set(XDG_basedir_VERSION ${PC_XDG_basedir_VERSION})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(XDG_basedir
+    FOUND_VAR XDG_basedir_FOUND
+    REQUIRED_VARS
+        XDG_basedir_LIBRARY
+        XDG_basedir_INCLUDE_DIR
+    VERSION_VAR XDG_basedir_VERSION
+)
+
+if (XDG_basedir_FOUND)
+    set(XDG_basedir_LIBRARIES ${XDG_basedir_LIBRARY})
+    set(XDG_basedir_INCLUDE_DIRS ${XDG_basedir_INCLUDE_DIR})
+endif ()
+
+mark_as_advanced(
+    XDG_basedir_INCLUDE_DIR
+    XDG_basedir_LIBRARY
+)
diff --git a/cmake/FindXaudio2.cmake b/cmake/FindXaudio2.cmake
new file mode 100644
index 000000000..065e2d358
--- /dev/null
+++ b/cmake/FindXaudio2.cmake
@@ -0,0 +1,18 @@
+# Autodetect if xaudio2 can be used.
+
+include(CheckCXXSourceCompiles)
+set(CMAKE_REQUIRED_FLAGS "")
+
+check_cxx_source_compiles("
+    #include <windows.h>
+
+    #undef NTDDI_VERSION
+    #undef _WIN32_WINNT
+
+    #define NTDDI_VERSION    NTDDI_WIN8
+    #define _WIN32_WINNT     _WIN32_WINNT_WIN8
+
+    #include <xaudio2.h>
+    int main() { return 0; }"
+    XAUDIO2_FOUND
+)
diff --git a/cmake/LinkPackage.cmake b/cmake/LinkPackage.cmake
new file mode 100644
index 000000000..f64ccfd51
--- /dev/null
+++ b/cmake/LinkPackage.cmake
@@ -0,0 +1,18 @@
+function(link_package NAME)
+    cmake_parse_arguments(LP "ENCOURAGED" "TARGET" "" ${ARGN})
+
+    if (${NAME}_FOUND)
+        string(TOUPPER "${NAME}" UCNAME)
+        add_definitions(-DWITH_${UCNAME})
+        if (LP_TARGET AND TARGET ${LP_TARGET})
+            target_link_libraries(openttd ${LP_TARGET})
+            message(STATUS "${NAME} found -- -DWITH_${UCNAME} -- ${LP_TARGET}")
+        else()
+            include_directories(${${NAME}_INCLUDE_DIRS} ${${NAME}_INCLUDE_DIR})
+            target_link_libraries(openttd ${${NAME}_LIBRARIES} ${${NAME}_LIBRARY})
+            message(STATUS "${NAME} found -- -DWITH_${UCNAME} -- ${${NAME}_INCLUDE_DIRS} ${${NAME}_INCLUDE_DIR} -- ${${NAME}_LIBRARIES} ${${NAME}_LIBRARY}")
+        endif()
+    elseif (LP_ENCOURAGED)
+        message(WARNING "${NAME} not found; compiling OpenTTD without ${NAME} is strongly disencouraged")
+    endif()
+endfunction()
diff --git a/cmake/Options.cmake b/cmake/Options.cmake
new file mode 100644
index 000000000..b292567f0
--- /dev/null
+++ b/cmake/Options.cmake
@@ -0,0 +1,84 @@
+# Set the options for the directories (personal, shared, global).
+#
+# set_directory_options()
+#
+function(set_directory_options)
+    if (APPLE)
+        set(DEFAULT_PERSONAL_DIR "Documents/OpenTTD")
+        set(DEFAULT_SHARED_DIR "/Library/Application Support/OpenTTD")
+        set(DEFAULT_GLOBAL_DIR "(not set)")
+    elseif (WIN32)
+        set(DEFAULT_PERSONAL_DIR "OpenTTD")
+        set(DEFAULT_SHARED_DIR "(not set)")
+        set(DEFAULT_GLOBAL_DIR "(not set)")
+    elseif (UNIX)
+        set(DEFAULT_PERSONAL_DIR ".openttd")
+        set(DEFAULT_SHARED_DIR "(not set)")
+        set(DEFAULT_GLOBAL_DIR "${CMAKE_INSTALL_PREFIX}/share/games/openttd")
+    else ()
+        message(FATAL_ERROR "Unknown OS found; please consider creating a Pull Request to add support for this OS.")
+    endif ()
+
+    if (NOT PERSONAL_DIR)
+        set(PERSONAL_DIR "${DEFAULT_PERSONAL_DIR}" CACHE STRING "Personal directory")
+        message(STATUS "Detecting Personal Data directory - ${PERSONAL_DIR}")
+    endif (NOT PERSONAL_DIR)
+
+    if (NOT SHARED_DIR)
+        set(SHARED_DIR "${DEFAULT_SHARED_DIR}" CACHE STRING "Shared directory")
+        message(STATUS "Detecting Shared Data directory - ${SHARED_DIR}")
+    endif (NOT SHARED_DIR)
+
+    if (NOT GLOBAL_DIR)
+        set(GLOBAL_DIR "${DEFAULT_GLOBAL_DIR}" CACHE STRING "Global directory")
+        message(STATUS "Detecting Global Data directory - ${GLOBAL_DIR}")
+    endif (NOT GLOBAL_DIR)
+endfunction()
+
+# Set some generic options that influence what is being build.
+#
+# set_options()
+#
+function(set_options)
+    if (UNIX AND NOT APPLE)
+        set(DEFAULT_OPTION_INSTALL_FHS YES)
+    else (UNIX AND NOT APPLE)
+        set(DEFAULT_OPTION_INSTALL_FHS NO)
+    endif (UNIX AND NOT APPLE)
+
+    option(OPTION_DEDICATED "Build dedicated server only (no GUI)" NO)
+    option(OPTION_INSTALL_FHS "Install with Filesstem Hierarchy Standard folders" ${DEFAULT_OPTION_INSTALL_FHS})
+    option(OPTION_USE_ASSERTS "Use assertions; leave enabled for nightlies, betas, and RCs" YES)
+    option(OPTION_USE_THREADS "Use threads" YES)
+endfunction()
+
+# Show the values of the generic options.
+#
+# show_options()
+#
+function(show_options)
+    message(STATUS "Option Dedicated - ${OPTION_DEDICATED}")
+    message(STATUS "Option Install FHS - ${OPTION_INSTALL_FHS}")
+    message(STATUS "Option Use assert - ${OPTION_USE_ASSERTS}")
+    message(STATUS "Option Use threads - ${OPTION_USE_THREADS}")
+endfunction()
+
+# Add the definitions for the options that are selected.
+#
+# add_definitions_based_on_options()
+#
+function(add_definitions_based_on_options)
+    if (OPTION_DEDICATED)
+        add_definitions(-DDEDICATED)
+    endif (OPTION_DEDICATED)
+
+    if (NOT OPTION_USE_THREADS)
+        add_definitions(-DNO_THREADS)
+    endif (NOT OPTION_USE_THREADS)
+
+    if (OPTION_USE_ASSERTS)
+        add_definitions(-DWITH_ASSERT)
+    else (OPTION_USE_ASSERTS)
+        add_definitions(-DNDEBUG)
+    endif (OPTION_USE_ASSERTS)
+endfunction()
diff --git a/cmake/SourceList.cmake b/cmake/SourceList.cmake
new file mode 100644
index 000000000..6300a19a4
--- /dev/null
+++ b/cmake/SourceList.cmake
@@ -0,0 +1,63 @@
+# Add a file to be compiled.
+#
+# add_files([file1 ...] CONDITION condition [condition ...])
+#
+# CONDITION is a complete statement that can be evaluated with if().
+# If it evaluates true, the source files will be added; otherwise not.
+# For example: ADD_IF SDL_FOUND AND Allegro_FOUND
+#
+function(add_files)
+    cmake_parse_arguments(PARAM "" "" "CONDITION" ${ARGN})
+    set(PARAM_FILES "${PARAM_UNPARSED_ARGUMENTS}")
+
+    if (PARAM_CONDITION)
+        if (NOT (${PARAM_CONDITION}))
+            return()
+        endif (NOT (${PARAM_CONDITION}))
+    endif (PARAM_CONDITION)
+
+    foreach(FILE IN LISTS PARAM_FILES)
+        target_sources(openttd PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/${FILE})
+    endforeach()
+endfunction(add_files)
+
+# This function works around an 'issue' with CMake, where
+# set_source_files_properties() only works in the scope of the file. We want
+# to set properties for the source file on a more global level. To solve this,
+# this function records the flags you want, and a macro adds them in the root
+# CMakeLists.txt.
+# See this URL for more information on the issue:
+# http://cmake.3232098.n2.nabble.com/scope-of-set-source-files-properties-td4766111.html
+#
+# set_compile_flags([file1 ...] COMPILE_FLAGS cflag [cflag ...])
+#
+function(set_compile_flags)
+    cmake_parse_arguments(PARAM "" "" "COMPILE_FLAGS" ${ARGN})
+    set(PARAM_FILES "${PARAM_UNPARSED_ARGUMENTS}")
+
+    get_property(SOURCE_PROPERTIES GLOBAL PROPERTY source_properties)
+
+    foreach(FILE IN LISTS PARAM_FILES)
+        list(APPEND SOURCE_PROPERTIES "${CMAKE_CURRENT_SOURCE_DIR}/${FILE}::${PARAM_COMPILE_FLAGS}")
+    endforeach()
+
+    set_property(GLOBAL PROPERTY source_properties "${SOURCE_PROPERTIES}")
+endfunction(set_compile_flags)
+
+# Call this macro in the same CMakeLists.txt and after add_executable().
+# This makes sure all the COMPILE_FLAGS of set_compile_flags() are set
+# correctly.
+#
+# process_compile_flags()
+#
+function(process_compile_flags)
+    get_property(SOURCE_PROPERTIES GLOBAL PROPERTY source_properties)
+
+    foreach(ENTRY ${SOURCE_PROPERTIES})
+        string(REPLACE "::" ";" ENTRY "${ENTRY}")
+        list(GET ENTRY 0 FILE)
+        list(GET ENTRY 1 PROPERTIES)
+
+        set_source_files_properties(${FILE} PROPERTIES COMPILE_FLAGS ${PROPERTIES})
+    endforeach()
+endfunction(process_compile_flags)
diff --git a/cmake/Static.cmake b/cmake/Static.cmake
new file mode 100644
index 000000000..7648d05e7
--- /dev/null
+++ b/cmake/Static.cmake
@@ -0,0 +1,14 @@
+# Set static linking if the platform requires it.
+#
+# set_static()
+#
+function(set_static_if_needed)
+     if (MINGW)
+        # Let exectutables run outside MinGW environment
+        # Force searching static libs
+        set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" PARENT_SCOPE)
+
+        # Force static linking
+        link_libraries(-static -static-libgcc -static-libstdc++)
+    endif()
+endfunction()
diff --git a/cmake/scripts/FindVersion.cmake b/cmake/scripts/FindVersion.cmake
new file mode 100644
index 000000000..5edabeb19
--- /dev/null
+++ b/cmake/scripts/FindVersion.cmake
@@ -0,0 +1,134 @@
+cmake_minimum_required(VERSION 3.5)
+
+#
+# Finds the current version of the current folder.
+#
+
+find_package(Git QUIET)
+# ${CMAKE_SOURCE_DIR}/.git may be a directory or a regular file
+if (GIT_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    # Make sure LC_ALL is set to something desirable
+    set(SAVED_LC_ALL "$ENV{LC_ALL}")
+    set(ENV{LC_ALL} C)
+
+    # Assume the dir is not modified
+    set(REV_MODIFIED 0)
+
+    # Refresh the index to make sure file stat info is in sync, then look for modifications
+    execute_process(COMMAND ${GIT_EXECUTABLE} update-index --refresh
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+                    OUTPUT_QUIET
+    )
+
+    # See if git tree is modified
+    execute_process(COMMAND ${GIT_EXECUTABLE} diff-index HEAD
+                    OUTPUT_VARIABLE IS_MODIFIED
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    )
+    if (NOT IS_MODIFIED STREQUAL "")
+        set(REV_MODIFIED 2)
+    endif()
+
+    # Get last commit hash
+    execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --verify HEAD
+                    OUTPUT_VARIABLE FULLHASH
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+                    ERROR_QUIET
+    )
+    set(REV_HASH "${FULLHASH}")
+
+    string(SUBSTRING "${FULLHASH}" 0 10 SHORTHASH)
+
+    # Get the last commit date
+    execute_process(COMMAND ${GIT_EXECUTABLE} show -s --pretty=format:%ci HEAD
+                    OUTPUT_VARIABLE COMMITDATE
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    )
+    string(REGEX REPLACE "([0-9]+)-([0-9]+)-([0-9]+).*" "\\1\\2\\3" COMMITDATE "${COMMITDATE}")
+    set(REV_ISODATE "${COMMITDATE}")
+    string(SUBSTRING REV_ISODATE 1 4 REV_YEAR)
+
+    # Get the branch
+    execute_process(COMMAND ${GIT_EXECUTABLE} symbolic-ref -q HEAD
+                    OUTPUT_VARIABLE BRANCH
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+                    ERROR_QUIET
+    )
+    string(REGEX REPLACE ".*/" "" BRANCH "${BRANCH}")
+
+    # Get the tag
+    execute_process(COMMAND ${GIT_EXECUTABLE} name-rev --name-only --tags --no-undefined HEAD
+                    OUTPUT_VARIABLE TAG
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+                    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+                    ERROR_QUIET
+    )
+    string(REGEX REPLACE "\^0$" "" TAG "${TAG}")
+
+    if (REV_MODIFIED EQUAL 0)
+        set(HASHPREFIX "-g")
+    elseif (REV_MODIFIED EQUAL 2)
+        set(HASHPREFIX "-m")
+    else ()
+        set(HASHPREFIX "-u")
+    endif()
+
+    # Set the version string
+    if (NOT TAG STREQUAL "")
+        set(REV_VERSION "${TAG}")
+        set(REV_ISTAG 1)
+
+        string(REGEX REPLACE "^[0-9.]*$" "" STABLETAG "${TAG}")
+        if (NOT STABLETAG STREQUAL "")
+            set(REV_ISSTABLETAG 1)
+        else ()
+            set(REV_ISSTABLETAG 0)
+        endif ()
+    else ()
+        set(REV_VERSION "${REV_ISODATE}-${BRANCH}${HASHPREFIX}${SHORTHASH}")
+        set(REV_ISTAG 0)
+        set(REV_ISSTABLETAG 0)
+    endif ()
+
+    # Restore LC_ALL
+    set(ENV{LC_ALL} "${SAVED_LC_ALL}")
+elseif (EXISTS "${CMAKE_SOURCE_DIR}/.ottdrev")
+    file(READ "${CMAKE_SOURCE_DIR}/.ottdrev" OTTDREV)
+    string(REPLACE "\t" ";" OTTDREV "${OTTDREV}")
+    list(GET OTTDREV 0 REV_VERSION)
+    list(GET OTTDREV 1 REV_ISODATE)
+    list(GET OTTDREV 2 REV_MODIFIED)
+    list(GET OTTDREV 3 REV_HASH)
+    list(GET OTTDREV 4 REV_ISTAG)
+    list(GET OTTDREV 5 REV_ISSTABLETAG)
+    list(GET OTTDREV 6 REV_YEAR)
+else ()
+    message(WARNING "No version detected; this build will NOT be network compatible")
+    set(REV_VERSION "norev0000")
+    set(REV_ISODATE "19700101")
+    set(REV_MODIFIED 1)
+    set(REV_HASH "unknown")
+    set(REV_ISTAG 0)
+    set(REV_ISSTABLETAG 0)
+    set(REV_YEAR "1970")
+endif ()
+
+message(STATUS "Version string: ${REV_VERSION}")
+
+message(STATUS "Generating rev.cpp")
+configure_file("${CMAKE_SOURCE_DIR}/src/rev.cpp.in"
+        "${FIND_VERSION_BINARY_DIR}/rev.cpp")
+
+if (WIN32)
+    message(STATUS "Generating ottdres.rc")
+    configure_file("${CMAKE_SOURCE_DIR}/src/os/windows/ottdres.rc.in"
+            "${FIND_VERSION_BINARY_DIR}/ottdres.rc")
+endif (WIN32)
+
+message(STATUS "Generating CPackProperties.cmake")
+configure_file("${CMAKE_SOURCE_DIR}/CPackProperties.cmake.in"
+        "${CPACK_BINARY_DIR}/CPackProperties.cmake" @ONLY)