#

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# conditions and the following disclaimer in the documentation and/or other materials provided

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cmake_minimum_required(VERSION 3.22)

project(libbz2)

function(require_var var)

if (NOT DEFINED ${var})

message(FATAL_ERROR "${var} needs to be set; was '${var}'")

endif()

endfunction()

require_var(BZIP2_ROOT)

require_var(BZIP2_VERSION_MAJOR)

require_var(BZIP2_VERSION_MINOR)

require_var(BZIP2_VERSION_PATCH)

set(BZIP2_VERSION "${BZIP2_VERSION_MAJOR}.${BZIP2_VERSION_MINOR}.${BZIP2_VERSION_PATCH}")

message(VERBOSE "Building libbz2 version: ${BZIP2_VERSION}")

set(PACKAGE_NAME "bzip2")

set(TARGET_LIBBZ2 "bz2")

set(BZIP2_SRC "${BZIP2_ROOT}/${PACKAGE_NAME}-${BZIP2_VERSION}")

add_library(${TARGET_LIBBZ2} STATIC)

# we want '-fPIC' even for the static lib

set_target_properties(${TARGET_LIBBZ2} PROPERTIES POSITION_INDEPENDENT_CODE TRUE)

# preprocessor defines for all platforms

target_compile_definitions(${TARGET_LIBBZ2} PRIVATE _FILE_OFFSET_BITS=64)

if(WIN32)

target_compile_options(${TARGET_LIBBZ2} PRIVATE /O2 /Wall)

else()

target_compile_options(${TARGET_LIBBZ2} PRIVATE -Wall -Winline -O2)

endif()

# don't install into the system but into the MX project's output dir

set(CMAKE_INSTALL_PREFIX ${CMAKE_BINARY_DIR})

# using glob patterns is not recommended: https://cmake.org/cmake/help/latest/command/file.html#glob

target_sources(${TARGET_LIBBZ2} PRIVATE

"${BZIP2_SRC}/bzlib.h"

"${BZIP2_SRC}/blocksort.c"

"${BZIP2_SRC}/huffman.c"

"${BZIP2_SRC}/crctable.c"

"${BZIP2_SRC}/randtable.c"

"${BZIP2_SRC}/compress.c"

"${BZIP2_SRC}/decompress.c"

"${BZIP2_SRC}/bzlib.c"

)