1 files changed, 101 insertions, 0 deletions
diff --git a/externals/nx_tzdb/CMakeLists.txt b/externals/nx_tzdb/CMakeLists.txt
new file mode 100644
index 000000000..593786250
--- /dev/null
+++ b/externals/nx_tzdb/CMakeLists.txt
@@ -0,0 +1,101 @@
+# SPDX-FileCopyrightText: 2023 yuzu Emulator Project
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set(NX_TZDB_INCLUDE_DIR "${CMAKE_CURRENT_BINARY_DIR}/include")
+
+add_library(nx_tzdb INTERFACE)
+
+find_program(GIT git)
+find_program(GNU_MAKE make)
+find_program(DATE_PROG date)
+
+set(CAN_BUILD_NX_TZDB true)
+
+if (NOT GIT)
+    set(CAN_BUILD_NX_TZDB false)
+endif()
+if (NOT GNU_MAKE)
+    set(CAN_BUILD_NX_TZDB false)
+endif()
+if (NOT DATE_PROG)
+    set(CAN_BUILD_NX_TZDB false)
+endif()
+if (CMAKE_SYSTEM_NAME STREQUAL "Windows" OR ANDROID)
+    # tzdb_to_nx currently requires a posix-compliant host
+    # MinGW and Android are handled here due to the executable format being different from the host system
+    # TODO (lat9nq): cross-compiling support
+    set(CAN_BUILD_NX_TZDB false)
+endif()
+
+set(NX_TZDB_VERSION "220816")
+set(NX_TZDB_ARCHIVE "${CMAKE_CURRENT_BINARY_DIR}/${NX_TZDB_VERSION}.zip")
+
+set(NX_TZDB_ROMFS_DIR "${CMAKE_CURRENT_BINARY_DIR}/nx_tzdb")
+
+if ((NOT CAN_BUILD_NX_TZDB OR YUZU_DOWNLOAD_TIME_ZONE_DATA) AND NOT EXISTS ${NX_TZDB_ARCHIVE})
+    set(NX_TZDB_DOWNLOAD_URL "https://github.com/lat9nq/tzdb_to_nx/releases/download/${NX_TZDB_VERSION}/${NX_TZDB_VERSION}.zip")
+
+    message(STATUS "Downloading time zone data from ${NX_TZDB_DOWNLOAD_URL}...")
+    file(DOWNLOAD ${NX_TZDB_DOWNLOAD_URL} ${NX_TZDB_ARCHIVE}
+        STATUS NX_TZDB_DOWNLOAD_STATUS)
+    list(GET NX_TZDB_DOWNLOAD_STATUS 0 NX_TZDB_DOWNLOAD_STATUS_CODE)
+    if (NOT NX_TZDB_DOWNLOAD_STATUS_CODE EQUAL 0)
+        message(FATAL_ERROR "Time zone data download failed (status code ${NX_TZDB_DOWNLOAD_STATUS_CODE})")
+    endif()
+
+    file(ARCHIVE_EXTRACT
+        INPUT
+            ${NX_TZDB_ARCHIVE}
+        DESTINATION
+            ${NX_TZDB_ROMFS_DIR})
+elseif (CAN_BUILD_NX_TZDB AND NOT YUZU_DOWNLOAD_TIME_ZONE_DATA)
+    add_subdirectory(tzdb_to_nx)
+    add_dependencies(nx_tzdb x80e)
+
+    set(NX_TZDB_ROMFS_DIR "${NX_TZDB_DIR}")
+endif()
+
+target_include_directories(nx_tzdb
+    INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include
+    INTERFACE ${NX_TZDB_INCLUDE_DIR})
+
+function(CreateHeader ZONE_PATH HEADER_NAME)
+    set(HEADER_PATH "${NX_TZDB_INCLUDE_DIR}/nx_tzdb/${HEADER_NAME}.h")
+    add_custom_command(
+        OUTPUT
+            ${NX_TZDB_INCLUDE_DIR}/nx_tzdb/${HEADER_NAME}.h
+        COMMAND
+            ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_SOURCE_DIR}/NxTzdbCreateHeader.cmake
+                ${ZONE_PATH}
+                ${HEADER_NAME}
+                ${NX_TZDB_INCLUDE_DIR}
+                ${CMAKE_CURRENT_SOURCE_DIR}
+        DEPENDS
+            tzdb_template.h.in
+            NxTzdbCreateHeader.cmake)
+
+    target_sources(nx_tzdb PRIVATE ${HEADER_PATH})
+endfunction()
+
+CreateHeader(${NX_TZDB_ROMFS_DIR} base)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo zoneinfo)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Africa africa)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/America america)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/America/Argentina america_argentina)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/America/Indiana america_indiana)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/America/Kentucky america_kentucky)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/America/North_Dakota america_north_dakota)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Antarctica antarctica)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Arctic arctic)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Asia asia)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Atlantic atlantic)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Australia australia)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Brazil brazil)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Canada canada)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Chile chile)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Etc etc)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Europe europe)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Indian indian)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Mexico mexico)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/Pacific pacific)
+CreateHeader(${NX_TZDB_ROMFS_DIR}/zoneinfo/US us)