# Copyright (c) 2008-2023 the Urho3D project
# License: MIT

include (CheckIncludeFiles)

# Define target name
set (TARGET_NAME ik)

check_include_files (stdint.h IK_HAVE_STDINT_H)

option (IK_MEMORY_DEBUGGING "Global switch for memory options. Keep track of the number of allocations and de-allocations and prints a report when the program shuts down" FALSE)
cmake_dependent_option (IK_MEMORY_BACKTRACE "Generate backtraces for every malloc(), making it easy to track down memory leaks" FALSE "IK_MEMORY_DEBUGGING AND UNIX AND NOT WEB AND NOT ANDROID" FALSE)

# Need to set IK_PLATFORM for dllimport/dllexport
if (WIN32)
    set (IK_PLATFORM "WINDOWS")
elseif (APPLE AND ${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
    set (IK_PLATFORM "OSX")
elseif (IOS)
    set (IK_PLATFORM "IOS")
elseif (UNIX)
    set (IK_PLATFORM "LINUX")
else ()
    set (IK_PLATFORM "ANDROID")
endif ()

# Enable restrict keyword in quaternion and vector operations if not in debug
# Only do this if IK_RESTRICT is not cached yet.
get_cmake_property (CACHED_VARS VARIABLES)
list (FIND CACHED_VARS "IK_RESTRICT" RESULT)
if (${RESULT} MATCHES -1)
    foreach (RESTRICT_KEYWORD restrict __restrict __restrict__)
        check_c_source_compiles ("int test (void *${RESTRICT_KEYWORD} x); int main (void) {return 0;}" IK_RESTRICT_${RESTRICT_KEYWORD})
        if (IK_RESTRICT_${RESTRICT_KEYWORD})
            set (IK_RESTRICT ${RESTRICT_KEYWORD})
            break ()
        endif ()
    endforeach ()
    set (IK_RESTRICT ${IK_RESTRICT} CACHE STRING "Restrict Keyword (may be empty)")
endif ()

set (IK_REAL float CACHE STRING "Type to use for real numbers")
option (IK_DOT_OUTPUT "When enabled, the generated chains are dumped to DOT for debug purposes" OFF)

# Define source files
define_source_files (GLOB_CPP_PATTERNS src/*.c GLOB_H_PATTERNS include/ik/*.h)
if (IK_MEMORY_BACKTRACE)
    list (APPEND SOURCE_FILES src/platform/linux/backtrace_linux.c)
endif ()

# Define generated source files
set (IK_LIB_TYPE STATIC)      # Urho always builds its 3rd-party as STATIC lib
configure_file (include/ik/export.h.in ${CMAKE_CURRENT_BINARY_DIR}/include/generated/ik/export.h)
configure_file (include/ik/config.h.in ${CMAKE_CURRENT_BINARY_DIR}/include/generated/ik/config.h)

# Define dependency libs
set (INCLUDE_DIRS ${CMAKE_CURRENT_BINARY_DIR}/include/generated include)

# Setup target
setup_library ()

# Install headers for building the Urho3D library
install_header_files (DIRECTORY include/ik/ DESTINATION ${DEST_INCLUDE_DIR}/ThirdParty/ik FILES_MATCHING PATTERN *.h USE_FILE_SYMLINK BUILD_TREE_ONLY)  # Note: the trailing slash is significant
install_header_files (FILES ${CMAKE_CURRENT_BINARY_DIR}/include/generated/ik/export.h ${CMAKE_CURRENT_BINARY_DIR}/include/generated/ik/config.h DESTINATION ${DEST_INCLUDE_DIR}/ThirdParty/ik BUILD_TREE_ONLY)