From 050961bf43e5dcb13cd4d56c073c6c3e0e93797a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beat=20K=C3=BCng?= <beat-kueng@gmx.net>
Date: Mon, 7 Dec 2020 20:54:59 +0100
Subject: [PATCH] libs: add xz-embedded lzma decoding library

Using a mirror, because CI had problems cloning from the
original source:
gnutls_handshake() failed: Handshake failed
---
 .gitmodules         |  3 +++
 QGCExternalLibs.pri | 18 ++++++++++++++++++
 libs/xz-embedded    |  1 +
 3 files changed, 22 insertions(+)
 create mode 160000 libs/xz-embedded

diff --git a/.gitmodules b/.gitmodules
index 79def16..c41ef18 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "libs/qmlglsink/gst-plugins-good"]
 	path = libs/qmlglsink/gst-plugins-good
 	url = https://github.com/mavlink/gst-plugins-good.git
+[submodule "libs/xz-embedded"]
+	path = libs/xz-embedded
+	url = https://github.com/Auterion/xz-embedded.git
diff --git a/QGCExternalLibs.pri b/QGCExternalLibs.pri
index 2fb878d..0dff29c 100644
--- a/QGCExternalLibs.pri
+++ b/QGCExternalLibs.pri
@@ -119,6 +119,24 @@ WindowsBuild {
 }
 
 #
+# [REQUIRED] LZMA decompression library
+HEADERS+= \
+    libs/xz-embedded/linux/include/linux/xz.h \
+    libs/xz-embedded/linux/lib/xz/xz_lzma2.h \
+    libs/xz-embedded/linux/lib/xz/xz_private.h \
+    libs/xz-embedded/linux/lib/xz/xz_stream.h \
+    libs/xz-embedded/userspace/xz_config.h
+SOURCES += \
+    libs/xz-embedded/linux/lib/xz/xz_crc32.c \
+    libs/xz-embedded/linux/lib/xz/xz_crc64.c \
+    libs/xz-embedded/linux/lib/xz/xz_dec_lzma2.c \
+    libs/xz-embedded/linux/lib/xz/xz_dec_stream.c
+INCLUDEPATH += \
+    libs/xz-embedded/userspace \
+    libs/xz-embedded/linux/include/linux
+DEFINES += XZ_DEC_ANY_CHECK XZ_USE_CRC64
+
+#
 # [REQUIRED] SDL dependency. Provides joystick/gamepad support.
 # The SDL is packaged with QGC for the Mac and Windows. Linux support requires installing the SDL
 # library (development libraries and static binaries).
diff --git a/libs/xz-embedded b/libs/xz-embedded
new file mode 160000
index 0000000..090e6a0
--- /dev/null
+++ b/libs/xz-embedded
@@ -0,0 +1 @@
+Subproject commit 090e6a054d6283b144d20f5783852b95eade90ee