cmake_minimum_required(VERSION 3.21)
project(unshield C)

# Mimic CMP0048 which is avaliable only for cmake 3.0 and later
set(PROJECT_VERSION_MAJOR 1)
set(PROJECT_VERSION_MINOR 6)
set(PROJECT_VERSION_PATCH 2)
set(PROJECT_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")

option(BUILD_STATIC "Build static version of libunshield" OFF)

include(CheckIncludeFiles)
include(CheckSymbolExists)
include(CheckCSourceCompiles)
if(IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/test")
    include(CTest)
endif()
include(GNUInstallDirs)

check_include_files(dlfcn.h HAVE_DLFCN_H)
check_include_files(inttypes.h HAVE_INTTYPES_H)
check_include_files(memory.h HAVE_MEMORY_H)
check_include_files(stdbool.h HAVE_STDBOOL_H)
check_include_files(stdint.h HAVE_STDINT_H)
check_include_files(stdlib.h HAVE_STDLIB_H)
check_include_files(strings.h HAVE_STRINGS_H)
check_include_files(string.h HAVE_STRING_H)
check_include_files(sys/stat.h HAVE_SYS_STAT_H)
check_include_files(sys/types.h HAVE_SYS_TYPES_H)
check_include_files(unistd.h HAVE_UNISTD_H)
check_symbol_exists(fnmatch fnmatch.h HAVE_FNMATCH)
check_symbol_exists(iconv iconv.h HAVE_ICONV)

set(SIZE_FORMAT "zi")
check_c_source_compiles("#include <stdio.h>\nint main(int argc, char **argv) { size_t value = 0; printf(\"%${SIZE_FORMAT}\", value); return 0; }" SIZE_FORMAT_ZI)
if(NOT SIZE_FORMAT_ZI)
    set(SIZE_FORMAT "i")
    check_c_source_compiles("#include <stdio.h>\nint main(int argc, char **argv) { size_t value = 0; printf(\"%${SIZE_FORMAT}\", value); return 0; }" SIZE_FORMAT_I)
    if(NOT SIZE_FORMAT_I)
        set(SIZE_FORMAT "li")
        check_c_source_compiles("#include <stdio.h>\nint main(int argc, char **argv) { size_t value = 0; printf(\"%${SIZE_FORMAT}\", value); return 0; }" SIZE_FORMAT_LI)
        if(NOT SIZE_FORMAT_LI)
            message(FATAL_ERROR "You must be using a really weird platform!")
        endif()
    endif()
endif()

find_package(ZLIB REQUIRED)
find_package(OpenSSL)

if(${OPENSSL_FOUND})
    option(USE_OUR_OWN_MD5 "Build using own md5 implementation" OFF)
else()
    option(USE_OUR_OWN_MD5 "Build using own md5 implementation" ON)
endif()

message(STATUS "OPENSSL_FOUND: ${OPENSSL_FOUND}")
message(STATUS "USE_OUR_OWN_MD5: ${USE_OUR_OWN_MD5}")
message(STATUS "BUILD_STATIC: ${BUILD_STATIC}")
if(IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/test")
    message(STATUS "BUILD_TESTING: ${BUILD_TESTING}")
else()
    set(BUILD_TESTING OFF)
endif()

add_definitions(-DHAVE_CONFIG_H)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/lib/unshield_config.h.in ${CMAKE_CURRENT_BINARY_DIR}/lib/unshield_config.h)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libunshield.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libunshield.pc @ONLY)
include_directories(${CMAKE_CURRENT_BINARY_DIR})
include_directories(${CMAKE_CURRENT_BINARY_DIR}/lib)

# Function to change MSVC runtime linkage to static
function(set_msvc_runtime_static)
    foreach(flag_var
        CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
        CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
        if(${flag_var} MATCHES "/MD")
            string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
        endif()
    endforeach()
endfunction()

if (MSVC)
    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
    include_directories(${CMAKE_CURRENT_SOURCE_DIR}/win32_msvc)
endif ()

add_subdirectory(lib)
add_subdirectory(src)

install(FILES man/unshield.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libunshield.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
install(EXPORT unshieldConfig NAMESPACE unshield:: DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/unshield)

if(BUILD_TESTING)
    add_subdirectory(test)
endif()
