Convert lzma build to FetchContent

.gitmodules

@@ -1,9 +1,6 @@
 [submodule "app/src/main/cpp/libarchive"]
 	path = app/src/main/cpp/libarchive
 	url = https://github.com/Ehviewer-Overhauled/libarchive
-[submodule "app/src/main/cpp/liblzma"]
-	path = app/src/main/cpp/liblzma
-	url = https://github.com/Ehviewer-Overhauled/xz
 [submodule "app/src/main/cpp/nettle/nettle"]
 	path = app/src/main/cpp/nettle/nettle
 	url = https://github.com/Ehviewer-Overhauled/nettle

app/src/main/cpp/0001-Don-t-build-other-binarys.patch

@@ -0,0 +1,34 @@
+From fc9fb0ea245259e346ab46c334f03b557fe63b6b Mon Sep 17 00:00:00 2001
+From: tarsin <yuanqingxiang233@163.com>
+Date: Tue, 22 Nov 2022 12:37:12 +0800
+Subject: [PATCH] Don't build other binarys
+
+---
+ CMakeLists.txt | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 01c73cd..b461e68 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -592,7 +592,7 @@ check_symbol_exists(getopt_long getopt.h HAVE_GETOPT_LONG)
+ # xzdec
+ #############################################################################
+ 
+-if(HAVE_GETOPT_LONG)
++if(0)
+     add_executable(xzdec
+         src/common/sysdefs.h
+         src/common/tuklib_common.h
+@@ -630,7 +630,7 @@ endif()
+ # xz
+ #############################################################################
+ 
+-if(NOT MSVC AND HAVE_GETOPT_LONG)
++if(0)
+     add_executable(xz
+         src/common/mythread.h
+         src/common/sysdefs.h
+-- 
+2.39.2
+

app/src/main/cpp/CMakeLists.txt

@@ -1,5 +1,6 @@
-project(ehviewer)
-cmake_minimum_required(VERSION 3.4.1)
+cmake_minimum_required(VERSION 3.14)
+project(ehviewer C)
+include(FetchContent)
 
 if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Ofast -fvisibility=hidden -fvisibility-inlines-hidden -funroll-loops -flto=thin \
@@ -15,6 +16,21 @@ if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
            -mllvm -polly-invariant-load-hoisting")
 endif (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
 
+# Change the default path of fetch content to avoid downloading the same dependencies per architecture
+get_filename_component(deps "../_deps" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
+set(FETCHCONTENT_BASE_DIR ${deps})
+
+FetchContent_Declare(liblzma
+        GIT_REPOSITORY  https://git.tukaani.org/xz.git
+        GIT_TAG         v5.4.1
+        PATCH_COMMAND   git apply ${CMAKE_CURRENT_LIST_DIR}/0001-Don-t-build-other-binarys.patch || true
+        BINARY_DIR      build
+        SUBBUILD_DIR    subbuild
+        )
+
+FetchContent_MakeAvailable(liblzma)
+include_directories(${liblzma_SOURCE_DIR}/src/liblzma/api)
+
 # Build GNUTLS libnettle
 add_subdirectory(nettle)
 
@@ -29,11 +45,7 @@ set(HAVE_NETTLE_PBKDF2_H 1)
 set(HAVE_NETTLE_RIPEMD160_H 1)
 set(HAVE_NETTLE_SHA_H 1)
 
-# Build liblzma
-add_subdirectory(liblzma)
-
 # Configure lzma support for libarchive
-include_directories(liblzma/src/liblzma/api)
 SET(HAVE_LIBLZMA 1)
 SET(HAVE_LZMA_H 1)
 SET(HAVE_LZMA_STREAM_ENCODER_MT 1)
@@ -41,7 +53,7 @@ SET(HAVE_LZMADEC_H 1)
 SET(HAVE_LIBLZMADEC 1)
 
 # Configure libarchive link's static lib
-SET(LIBARCHIVE_CUSTOM_LIBS "liblzma" "nettle")
+SET(LIBARCHIVE_CUSTOM_LIBS "nettle" "liblzma")
 
 # Build libarchive
 add_subdirectory(libarchive)