cmake_minimum_required(VERSION 3.13)
include(CheckFunctionExists)
include(CheckSymbolExists)

PROJECT(ucode C)
ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -ffunction-sections -D_GNU_SOURCE)

IF(CMAKE_C_COMPILER_VERSION VERSION_GREATER 6)
	ADD_DEFINITIONS(-Wextra -Werror=implicit-function-declaration)
	ADD_DEFINITIONS(-Wformat -Werror=format-security -Werror=format-nonliteral)
ENDIF()
ADD_DEFINITIONS(-Wmissing-declarations -Wno-error=unused-variable -Wno-unused-parameter)

OPTION(FS_SUPPORT "Filesystem plugin support" ON)
OPTION(MATH_SUPPORT "Math plugin support" ON)
OPTION(UBUS_SUPPORT "Ubus plugin support" ON)
OPTION(UCI_SUPPORT "UCI plugin support" ON)

OPTION(LEGACY_SUPPORT "Support deprecated syntax features" ON)

SET(LIB_SEARCH_PATH "${CMAKE_INSTALL_PREFIX}/lib/ucode/*.so:${CMAKE_INSTALL_PREFIX}/share/ucode/*.uc:./*.so:./*.uc" CACHE STRING "Default library search path")
STRING(REPLACE ":" "\", \"" LIB_SEARCH_DEFINE "${LIB_SEARCH_PATH}")
ADD_DEFINITIONS(-DLIB_SEARCH_PATH="${LIB_SEARCH_DEFINE}")

IF(NOT APPLE)
  SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "-Wl,--gc-sections")
ENDIF()

FIND_LIBRARY(json NAMES json-c json)

IF(DEBUG)
  ADD_DEFINITIONS(-DDEBUG -g3 -O0)
ELSE()
  ADD_DEFINITIONS(-DNDEBUG)
ENDIF()

IF(NOT LEGACY_SUPPORT)
  ADD_DEFINITIONS(-DNO_LEGACY)
ENDIF()

INCLUDE(FindPkgConfig)
PKG_CHECK_MODULES(JSONC json-c json)
IF(JSONC_FOUND)
  ADD_DEFINITIONS(-DJSONC)
  INCLUDE_DIRECTORIES(${JSONC_INCLUDE_DIRS})
ENDIF()

SET(UCODE_SOURCES main.c lexer.c lib.c vm.c chunk.c value.c compiler.c source.c types.c)
ADD_EXECUTABLE(ucode ${UCODE_SOURCES})
SET_PROPERTY(TARGET ucode PROPERTY ENABLE_EXPORTS 1)
TARGET_LINK_LIBRARIES(ucode ${json})

CHECK_FUNCTION_EXISTS(dlopen DLOPEN_FUNCTION_EXISTS)
IF (NOT DLOPEN_FUNCTION_EXISTS)
  TARGET_LINK_LIBRARIES(ucode dl)
ENDIF()

SET(CMAKE_REQUIRED_LIBRARIES json-c)
CHECK_SYMBOL_EXISTS(json_object_array_shrink "json.h" HAVE_ARRAY_SHRINK)
IF(HAVE_ARRAY_SHRINK)
  ADD_DEFINITIONS(-DHAVE_ARRAY_SHRINK)
ELSE()
  CHECK_SYMBOL_EXISTS(json_object_array_shrink "json-c/json.h" HAVE_ARRAY_SHRINK2)
  IF(HAVE_ARRAY_SHRINK2)
    ADD_DEFINITIONS(-DHAVE_ARRAY_SHRINK)
  ENDIF()
ENDIF()
UNSET(CMAKE_REQUIRED_LIBRARIES)

SET(LIBRARIES "")

IF(FS_SUPPORT)
  SET(LIBRARIES ${LIBRARIES} fs_lib)
  ADD_LIBRARY(fs_lib MODULE lib/fs.c)
  SET_TARGET_PROPERTIES(fs_lib PROPERTIES OUTPUT_NAME fs PREFIX "")
ENDIF()

IF(MATH_SUPPORT)
  SET(LIBRARIES ${LIBRARIES} math_lib)
  ADD_LIBRARY(math_lib MODULE lib/math.c)
  SET_TARGET_PROPERTIES(math_lib PROPERTIES OUTPUT_NAME math PREFIX "")
  CHECK_FUNCTION_EXISTS(ceil CEIL_FUNCTION_EXISTS)
  IF (NOT CEIL_FUNCTION_EXISTS)
    TARGET_LINK_LIBRARIES(math_lib m)
  ENDIF()
ENDIF()

IF(UBUS_SUPPORT)
  FIND_LIBRARY(ubus NAMES ubus)
  FIND_LIBRARY(blobmsg_json NAMES blobmsg_json)
  FIND_PATH(ubus_include_dir NAMES libubus.h)
  INCLUDE_DIRECTORIES(${ubus_include_dir})
  SET(LIBRARIES ${LIBRARIES} ubus_lib)
  ADD_LIBRARY(ubus_lib MODULE lib/ubus.c)
  SET_TARGET_PROPERTIES(ubus_lib PROPERTIES OUTPUT_NAME ubus PREFIX "")
  TARGET_LINK_LIBRARIES(ubus_lib ${ubus} ${blobmsg_json})
ENDIF()

IF(UCI_SUPPORT)
  FIND_LIBRARY(uci NAMES uci)
  FIND_LIBRARY(ubox NAMES ubox)
  FIND_PATH(uci_include_dir uci.h)
  INCLUDE_DIRECTORIES(${uci_include_dir})
  SET(LIBRARIES ${LIBRARIES} uci_lib)
  ADD_LIBRARY(uci_lib MODULE lib/uci.c)
  SET_TARGET_PROPERTIES(uci_lib PROPERTIES OUTPUT_NAME uci PREFIX "")
  TARGET_LINK_LIBRARIES(uci_lib ${uci} ${ubox})
ENDIF()

IF(UNIT_TESTING)
  ENABLE_TESTING()
  ADD_DEFINITIONS(-DUNIT_TESTING)
  ADD_SUBDIRECTORY(tests)
  LIST(APPEND CMAKE_CTEST_ARGUMENTS "--output-on-failure")

  IF(CMAKE_C_COMPILER_ID STREQUAL "Clang")
    ADD_EXECUTABLE(ucode-san ${UCODE_SOURCES})
    SET_PROPERTY(TARGET ucode-san PROPERTY ENABLE_EXPORTS 1)
    TARGET_LINK_LIBRARIES(ucode-san ${json})
    TARGET_COMPILE_OPTIONS(ucode-san PRIVATE -g -fno-omit-frame-pointer -fsanitize=undefined,address,leak -fno-sanitize-recover=all)
    TARGET_LINK_OPTIONS(ucode-san PRIVATE -fsanitize=undefined,address,leak)
  ENDIF()
ENDIF()

INSTALL(TARGETS ucode RUNTIME DESTINATION bin)
INSTALL(TARGETS ${LIBRARIES} LIBRARY DESTINATION lib/ucode)