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# Shared CMake logic for every platform that builds the V library from source.
# Included by android/, linux/ and windows/.
cmake_minimum_required(VERSION 3.15)
project(vflutter LANGUAGES C)

find_program(V_EXECUTABLE v REQUIRED
  DOC "The V compiler. Set -DV_EXECUTABLE=/path/to/v to override.")

set(VF_SRC "${CMAKE_CURRENT_LIST_DIR}/vflutter.v")

# V cross-compiles by emitting C, so the reliable pattern is:
#   V source -> C  (V's job)      C -> object/library  (the platform's toolchain)
# This keeps the NDK / MSVC / clang in charge of ABI, sysroot and flags.
set(VF_GENERATED_C "${CMAKE_CURRENT_BINARY_DIR}/vflutter.gen.c")

add_custom_command(
  OUTPUT "${VF_GENERATED_C}"
  COMMAND "${V_EXECUTABLE}" -shared -gc none -no-parallel -o "${VF_GENERATED_C}" "${VF_SRC}"
  DEPENDS "${VF_SRC}"
  COMMENT "v -shared -> C (${CMAKE_SYSTEM_NAME}/${CMAKE_SYSTEM_PROCESSOR})"
  VERBATIM)

add_library(vflutter SHARED "${VF_GENERATED_C}")

target_include_directories(vflutter PUBLIC "${CMAKE_CURRENT_LIST_DIR}")

# V's generated C is machine output: silence the noise, keep real errors.
#
# -O2 is set unconditionally, including in Debug. This library is a numeric
# kernel with no Dart-visible debugger story of its own, and at -O0 the
# Mandelbrot path runs several times slower than the equivalent Dart — which
# makes a debug run of the example wildly misrepresent the bridge.
if(MSVC)
  target_compile_options(vflutter PRIVATE /O2)
else()
  target_compile_options(vflutter PRIVATE
    -O2 -w -fPIC -Wno-int-conversion -Wno-incompatible-pointer-types)
endif()

# Boehm GC ships with V and is linked statically by the V toolchain on desktop;
# on Android it must come from the NDK-built copy. See tool/build_gc.sh.
if(ANDROID)
  target_link_libraries(vflutter PRIVATE log)
endif()

set_target_properties(vflutter PROPERTIES
  OUTPUT_NAME "vflutter"
  C_VISIBILITY_PRESET hidden)