cmake_minimum_required(VERSION 3.18)   # find_program(... REQUIRED)
project(vmi-engine C)

set(CMAKE_C_STANDARD 17)               # generation B uses no C23 feature
set(CMAKE_C_STANDARD_REQUIRED ON)
set(CMAKE_C_EXTENSIONS ON)             # deliberate: strnlen (POSIX) + void* arithmetic (GNU)
set(CMAKE_POSITION_INDEPENDENT_CODE ON) # -fPIC on all objects: static lib stays linkable into a shared object

option(VMIE_LTO "Enable LTO" OFF)      # build-only; shipped default is -O2, no LTO

# ---- host: VMI core as a static library ---------------------------------
add_library(vmie STATIC
        src/core/gpa.c
        src/engine/gva.c
        src/engine/sigphys.c
        src/engine/win32/host.c
        src/engine/win32/pe.c
        src/engine/win32/proc.c
        src/engine/win32/profile.c
        src/engine/win32/text.c
        src/handlers/scan.c
        src/handlers/sigscan.c
        src/handlers/sigset.c
        src/handlers/codescan.c
        src/handlers/codeanalysis.c
        src/handlers/siggen.c
        src/handlers/x86dec.c
        src/handlers/pmap.c
        src/handlers/snapdiff.c)
target_include_directories(vmie
        PUBLIC  ${CMAKE_CURRENT_SOURCE_DIR}/include              # public API: include/*.h
        PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src/core/include     # private: core.h
                ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/include   # private: engine-arch.h, pe.h
                ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32)    # private: engine-win32.h, contract.h
target_compile_options(vmie PRIVATE -O2 -Wall -Wextra)
if(VMIE_LTO)
    target_compile_options(vmie PRIVATE -flto)
    target_link_options(vmie PRIVATE -flto)
endif()

# ---- host: CLI demonstrator over the library ----------------------------
add_executable(vmie_cli src/cli.c)
target_link_libraries(vmie_cli PRIVATE vmie)   # public include/ comes via vmie (PUBLIC)
target_compile_options(vmie_cli PRIVATE -Wall -Wextra)

# ---- host: dump-scan demonstrator (OS-agnostic, no win32) ----------------
add_executable(vmie_scan src/scan_cli.c)
target_link_libraries(vmie_scan PRIVATE vmie)
target_compile_options(vmie_scan PRIVATE -Wall -Wextra)

# ---- guest: cross-compile to Windows x86-64 via mingw-w64 ---------------
find_program(MINGW_CC NAMES x86_64-w64-mingw32-gcc REQUIRED)
set(VMIE_STARTUP ${CMAKE_CURRENT_BINARY_DIR}/vmie-startup.exe)
add_custom_command(
        OUTPUT  ${VMIE_STARTUP}
        COMMAND ${MINGW_CC} -O2 -Wall -Wextra -static -s
                -I${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32
                -o ${VMIE_STARTUP} ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32/guest.c
        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32/guest.c
                ${CMAKE_CURRENT_SOURCE_DIR}/src/engine/win32/contract.h
        COMMENT "Cross-compiling vmie-startup.exe (mingw-w64, x86-64)"
        VERBATIM)
add_custom_target(vmie-startup ALL DEPENDS ${VMIE_STARTUP})