#
# CMakeLists.txt to build the FLTK project using CMake (www.cmake.org)
# Originally written by Michael Surette
#
# Copyright 1998-2022 by Bill Spitzak and others.
#
# This library is free software. Distribution and use rights are outlined in
# the file "COPYING" which should have been included with this file.  If this
# file is missing or damaged, see the license at:
#
#     https://www.fltk.org/COPYING.php
#
# Please see the following page on how to report bugs and issues:
#
#     https://www.fltk.org/bugs.php
#

#######################################################################
# basic setup
#######################################################################

set (EXECUTABLE_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR}/bin)
set (LIBRARY_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR}/lib)
set (ARCHIVE_OUTPUT_PATH ${CMAKE_CURRENT_BINARY_DIR}/lib)

# Search for modules in the FLTK source dir first
set (CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake")

set (FLTK_INCLUDE_DIRS ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
include_directories (${FLTK_INCLUDE_DIRS})

# Remember root of FLTK source directory in case we're in a subdirectory.
# Used for instance to find the source directory for doxygen docs
set (FLTK_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})

# Setup install locations (requires CMake 2.8.4)

include(GNUInstallDirs)

set (FLTK_BINDIR ${CMAKE_INSTALL_BINDIR} CACHE PATH
  "Binary install path relative to CMAKE_INSTALL_PREFIX unless set to an absolute path.")
set (FLTK_LIBDIR ${CMAKE_INSTALL_LIBDIR} CACHE PATH
  "Library install path relative to CMAKE_INSTALL_PREFIX unless set to an absolute path.")
set (FLTK_INCLUDEDIR ${CMAKE_INSTALL_INCLUDEDIR} CACHE PATH
  "Public header install path relative to CMAKE_INSTALL_PREFIX unless set to an absolute path.")
set (FLTK_DATADIR ${CMAKE_INSTALL_DATADIR} CACHE PATH
  "Non-arch data install path relative to CMAKE_INSTALL_PREFIX unless set to an absolute path.")
set (FLTK_MANDIR ${CMAKE_INSTALL_MANDIR} CACHE PATH
  "Manual install path relative to CMAKE_INSTALL_PREFIX unless set to an absolute path.")
set (FLTK_DOCDIR ${CMAKE_INSTALL_DATADIR}/doc CACHE PATH
  "Non-arch doc install path relative to CMAKE_INSTALL_PREFIX unless set to an absolute path.")


#######################################################################
# initialize internally used variables
# some of these variables are used to *append* other values later
#######################################################################

set (FLTK_LDLIBS "")
set (FLTK_LIBRARIES "")
set (GLLIBS "")
set (IMAGELIBS "")
set (LDFLAGS "")
set (LIBS "")
set (LINK_LIBS "")
set (STATICIMAGELIBS "")

#######################################################################
# platform dependent information
#######################################################################

# set where config files go
if (WIN32 AND NOT CYGWIN)
  set (FLTK_CONFIG_PATH CMake)
elseif (APPLE AND NOT OPTION_APPLE_X11)
  set (FLTK_CONFIG_PATH FLTK.framework/Resources/CMake)
else ()
  set (FLTK_CONFIG_PATH ${FLTK_DATADIR}/fltk)
endif (WIN32 AND NOT CYGWIN)

include(TestBigEndian)
TEST_BIG_ENDIAN(WORDS_BIGENDIAN)

if (CMAKE_GENERATOR MATCHES "Xcode")
  if (NOT (CMAKE_VERSION VERSION_LESS 3.9)) # CMake 3.9 and up
    # Tell Xcode to regenerate scheme information automatically whenever the
    # CMake configuration changes without asking the user
    set (CMAKE_XCODE_GENERATE_SCHEME 1)
  endif()
endif()

if (APPLE)
  set (HAVE_STRCASECMP 1)
  set (HAVE_DIRENT_H 1)
  set (HAVE_SNPRINTF 1)
  set (HAVE_VSNPRINTF 1)
  set (HAVE_SCANDIR 1)
  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated")
  if (OPTION_APPLE_X11)
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -U__APPLE__")
    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -U__APPLE__")
    if (NOT(${CMAKE_SYSTEM_VERSION} VERSION_LESS 17.0.0)) # a.k.a. macOS version ≥ 10.13
      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LIBCPP_HAS_THREAD_API_PTHREAD")
    endif (NOT(${CMAKE_SYSTEM_VERSION} VERSION_LESS 17.0.0))
  else ()
    set (__APPLE_QUARTZ__ 1)
    set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -framework Cocoa")
    set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -framework Cocoa")
  endif (OPTION_APPLE_X11)
endif (APPLE)

if (WIN32)
  # we do no longer define WIN32 or _WIN32 (since FLTK 1.4.0)
  # ... but if we did, we'd define _WIN32 (since FLTK 1.4.0)
  # add_definitions (-D_WIN32)
  if (MSVC)
    add_definitions (-DWIN32_LEAN_AND_MEAN)
    add_definitions (-D_CRT_SECURE_NO_WARNINGS)
    if (NOT MSVC_VERSION VERSION_LESS 1900) # Visual Studio 2015
      add_compile_options (/utf-8)          # equivalent to `/source-charset:utf-8 /execution-charset:utf-8`
    endif ()
    set (BORDER_WIDTH 2)
  endif (MSVC)
  if (MINGW AND EXISTS /mingw)
    list(APPEND CMAKE_PREFIX_PATH /mingw)
  endif (MINGW AND EXISTS /mingw)
endif (WIN32)

#######################################################################
# size of ints
include(CheckTypeSize)

CHECK_TYPE_SIZE(short SIZEOF_SHORT)
CHECK_TYPE_SIZE(int   SIZEOF_INT)
CHECK_TYPE_SIZE(long  SIZEOF_LONG)
CHECK_TYPE_SIZE("long long" HAVE_LONG_LONG)

if (${SIZEOF_SHORT} MATCHES "^2$")
  set (U16 "unsigned short")
endif (${SIZEOF_SHORT} MATCHES "^2$")

if (${SIZEOF_INT} MATCHES "^4$")
  set (U32 "unsigned")
else ()
  if (${SIZEOF_LONG} MATCHES "^4$")
    set (U32 "unsigned long")
  endif (${SIZEOF_LONG} MATCHES "^4$")
endif (${SIZEOF_INT} MATCHES "^4$")

if (${SIZEOF_INT} MATCHES "^8$")
   set (U64 "unsigned")
else ()
   if (${SIZEOF_LONG} MATCHES "^8$")
    set (U64 "unsigned long")
   endif (${SIZEOF_LONG} MATCHES "^8$")
endif (${SIZEOF_INT} MATCHES "^8$")