From 4d26b50c367653fe6b4f1cc8ed5394792a2bc9dc Mon Sep 17 00:00:00 2001
From: Marcus Holland-Moritz <github@mhxnet.de>
Date: Sun, 22 Nov 2020 17:48:19 +0100
Subject: [PATCH] Ease requirements on library versions

---
 CMakeLists.txt   | 10 +++++-----
 src/mkdwarfs.cpp | 13 +++++++++++--
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ef8b06c..051a27d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,7 +18,7 @@
 
 project(dwarfs)
 
-cmake_minimum_required(VERSION 3.18)
+cmake_minimum_required(VERSION 3.13.4)
 
 option(WITH_TESTS "build with tests" OFF)
 
@@ -43,10 +43,10 @@ find_package(PkgConfig REQUIRED)
 find_package(Boost 1.67 REQUIRED COMPONENTS date_time filesystem
                                             program_options system)
 
-pkg_check_modules(FUSE3 REQUIRED IMPORTED_TARGET fuse3>=3.9.1)
-pkg_check_modules(LIBLZ4 IMPORTED_TARGET liblz4>=1.9.2)
-pkg_check_modules(LIBLZMA IMPORTED_TARGET liblzma>=5.2.5)
-pkg_check_modules(LIBZSTD IMPORTED_TARGET libzstd>=1.4.4)
+pkg_check_modules(FUSE3 REQUIRED IMPORTED_TARGET fuse3>=3.4.1)
+pkg_check_modules(LIBLZ4 IMPORTED_TARGET liblz4>=1.8.3)
+pkg_check_modules(LIBLZMA IMPORTED_TARGET liblzma>=5.2.4)
+pkg_check_modules(LIBZSTD IMPORTED_TARGET libzstd>=1.3.8)
 
 add_subdirectory(folly EXCLUDE_FROM_ALL)
 
diff --git a/src/mkdwarfs.cpp b/src/mkdwarfs.cpp
index ff87ae95..88414e97 100644
--- a/src/mkdwarfs.cpp
+++ b/src/mkdwarfs.cpp
@@ -38,7 +38,7 @@
 #include <folly/Format.h>
 #include <folly/gen/String.h>
 
-#if DWARFS_HAVE_LIBZSTD
+#ifdef DWARFS_HAVE_LIBZSTD
 #include <zstd.h>
 #endif
 
@@ -63,6 +63,15 @@ using namespace dwarfs;
 
 namespace {
 
+#ifdef DWARFS_HAVE_LIBZSTD
+#if ZSTD_VERSION_MAJOR > 1 ||                                                  \
+    (ZSTD_VERSION_MAJOR == 1 && ZSTD_VERSION_MINOR >= 4)
+#define ZSTD_MIN_LEVEL ZSTD_minCLevel()
+#else
+#define ZSTD_MIN_LEVEL 1
+#endif
+#endif
+
 #ifdef DWARFS_HAVE_LUA
 constexpr const char* script_name = "dwarfs.lua";
 #endif
@@ -322,7 +331,7 @@ int mkdwarfs(int argc, char** argv) {
 #ifdef DWARFS_HAVE_LIBZSTD
                  "  zstd     ZSTD compression\n"
                  "               level=["
-              << ZSTD_minCLevel() << ".." << ZSTD_maxCLevel()
+              << ZSTD_MIN_LEVEL << ".." << ZSTD_maxCLevel()
               << "]\n"
 #endif
 #ifdef DWARFS_HAVE_LIBLZMA