bzip2 only provides a Makefile which is not very usable on Windows,
and it is a pretty simple project, so we create CMakeLists.txt file to
compile the project on all platforms.

diff -rupN orig/CMakeLists.txt patched/CMakeLists.txt
--- orig/CMakeLists.txt	1970-01-01 01:00:00.000000000 +0100
+++ patched/CMakeLists.txt	2020-03-31 21:51:58.000000000 +0200
@@ -0,0 +1,27 @@
+cmake_minimum_required(VERSION 3.7)
+
+project(bzip2)
+
+set(SOURCES blocksort.c
+            huffman.c
+            crctable.c
+            randtable.c
+            compress.c
+            decompress.c
+            bzlib.c)
+
+set(PUBLIC_HEADERS bzlib.h)
+
+add_library(bz2 STATIC ${SOURCES})
+
+set_property(TARGET bz2 PROPERTY POSITION_INDEPENDENT_CODE ON)
+
+target_compile_definitions(bz2
+                            PRIVATE
+                              _FILE_OFFSET_BITS=64)
+
+install(TARGETS bz2
+    ARCHIVE DESTINATION lib
+)
+
+install(FILES ${PUBLIC_HEADERS} DESTINATION include)