CMake: refactor and reformat CMake files

- raise minimum CMake version from 2.6.3 to 3.2.3 (Jun 01, 2015)
- indent all CMake files according to the CMP (2 col.)
- refactor FLTK version number definitions and usage
- unify CMake and autoconf/configure variable names:
  - FL_VERSION -> FLTK_VERSION
  - FL_MAJOR_VERSION -> FLTK_VERSION_MAJOR
  - etc. for _MINOR_ and _PATCH_, respectively
  - note: this does not affect FL_VERSION etc. in source code
- generate "export headers" for all libraries (experimental: OFF)
- port some forgotten goodies from branch-1.3 to master
- merge and improve macro 'create_example' (WIP)
- remove "temporary" options and code for older CMake versions
- include and use 'GenerateExportHeader' (experimental, WIP: OFF)
  - note: created header files are not yet used
- build only *one* DLL with Visual Studio (tested, works)
  - similar to the bundled IDE projects in 1.3.x
- add some dynamically linked test/demo programs ('*-shared')
  if shared libraries are built (WIP)
- split 'macros.cmake': use one file per macro

1 files changed, 0 insertions, 204 deletions

diff --git a/CMake/macros.cmake b/CMake/macros.cmake
deleted file mode 100644
index b91b80b89..000000000
--- a/CMake/macros.cmake
+++ /dev/null
@@ -1,204 +0,0 @@
-#
-# Macros used by the CMake build system for the Fast Light Tool Kit (FLTK).
-# Written by Michael Surette
-#
-# Copyright 1998-2018 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
-#
-
-#######################################################################
-# macros used for debugging purposes
-#######################################################################
-
-# This macro displays the name and value of a CMake variable.
-# The variable name is expanded with spaces to be (at least)
-# <min_len> (currently 24) characters wide for better readability.
-# VARNAME must be a string literal, e.g. WIN32 or "WIN32".
-#
-# Syntax:
-#   fl_debug_var(VARNAME)
-#
-# Example:
-#   fl_debug_var(WIN32)
-#   fl_debug_var("UNIX")
-#
-
-macro (fl_debug_var name)
-  set (min_len 24)
-  set (var "${name}")
-  string(LENGTH "${var}" len)
-  while (len LESS min_len)
-    # add one space until min_len is reached
-    # ** string(APPEND var " ") # requires CMake 3.4.x (otherwise loop...)
-    set (var "${var} ")
-    string(LENGTH "${var}" len)
-  endwhile (len LESS min_len)
-  message (STATUS "${var} = '${${name}}'")
-endmacro (fl_debug_var)
-
-#######################################################################
-# macros used by the build system
-#######################################################################
-macro(FL_ADD_LIBRARY LIBNAME LIBTYPE LIBFILES)
-
-    if (${LIBTYPE} STREQUAL "SHARED")
-      set (TARGET_NAME ${LIBNAME}_SHARED)
-    else ()
-      set (TARGET_NAME ${LIBNAME})
-    endif (${LIBTYPE} STREQUAL "SHARED")
-
-    if (MSVC)
-        set (DEBUG_OUTPUT_NAME "${LIBNAME}d")
-    else ()
-        set (DEBUG_OUTPUT_NAME "${LIBNAME}")
-    endif (MSVC)
-
-    add_library(${TARGET_NAME} ${LIBTYPE} ${LIBFILES})
-
-    set_target_properties(${TARGET_NAME}
-        PROPERTIES
-        OUTPUT_NAME ${LIBNAME}
-        DEBUG_OUTPUT_NAME ${DEBUG_OUTPUT_NAME}
-        CLEAN_DIRECT_OUTPUT TRUE
-        COMPILE_DEFINITIONS "FL_LIBRARY"
-        )
-
-    if (${LIBTYPE} STREQUAL "SHARED")
-        set_target_properties(${TARGET_NAME}
-            PROPERTIES
-            OUTPUT_NAME ${LIBNAME}
-            DEBUG_OUTPUT_NAME ${DEBUG_OUTPUT_NAME}
-            VERSION ${FLTK_VERSION_FULL}
-            SOVERSION ${FLTK_VERSION_MAJOR}.${FLTK_VERSION_MINOR}
-            PREFIX "lib"    # for MSVC static/shared coexistence
-            )
-    endif (${LIBTYPE} STREQUAL "SHARED")
-
-    if (MSVC)
-        if (OPTION_LARGE_FILE)
-            set_target_properties(${TARGET_NAME}
-                PROPERTIES
-                LINK_FLAGS /LARGEADDRESSAWARE
-                )
-        endif (OPTION_LARGE_FILE)
-
-        if (${LIBTYPE} STREQUAL "SHARED")
-            set_target_properties(${TARGET_NAME}
-                PROPERTIES
-                COMPILE_DEFINITIONS "FL_DLL"
-                )
-        endif (${LIBTYPE} STREQUAL "SHARED")
-    endif (MSVC)
-
-    install(TARGETS ${TARGET_NAME}
-        EXPORT FLTK-Targets
-        RUNTIME DESTINATION ${FLTK_BINDIR}
-        LIBRARY DESTINATION ${FLTK_LIBDIR}
-        ARCHIVE DESTINATION ${FLTK_LIBDIR}
-        )
-
-    list(APPEND FLTK_LIBRARIES "${TARGET_NAME}")
-    set (FLTK_LIBRARIES ${FLTK_LIBRARIES} PARENT_SCOPE)
-
-endmacro(FL_ADD_LIBRARY LIBNAME LIBTYPE LIBFILES)
-
-#######################################################################
-# USAGE: FLTK_RUN_FLUID TARGET_NAME "FLUID_SOURCE [.. FLUID_SOURCE]"
-function(FLTK_RUN_FLUID TARGET SOURCES)
-    set (CXX_FILES)
-    foreach(src ${SOURCES})
-        if ("${src}" MATCHES "\\.fl$")
-            string(REGEX REPLACE "(.*).fl" \\1 basename ${src})
-            add_custom_command(
-                OUTPUT "${basename}.cxx" "${basename}.h"
-                COMMAND fluid -c ${CMAKE_CURRENT_SOURCE_DIR}/${src}
-                DEPENDS ${src}
-                MAIN_DEPENDENCY ${src}
-                )
-            list(APPEND CXX_FILES "${basename}.cxx")
-        endif ("${src}" MATCHES "\\.fl$")
-        set (${TARGET} ${CXX_FILES} PARENT_SCOPE)
-    endforeach(src)
-endfunction(FLTK_RUN_FLUID TARGET SOURCES)
-
-#######################################################################
-macro(CREATE_EXAMPLE NAME SOURCES LIBRARIES)
-
-    set (srcs)                  # source files
-    set (flsrcs)                # fluid source files
-
-    set (tname ${NAME})         # target name
-    set (oname ${NAME})         # output (executable) name
-
-    foreach(src ${SOURCES})
-        if ("${src}" MATCHES "\\.fl$")
-            list(APPEND flsrcs ${src})
-        else ()
-            list(APPEND srcs ${src})
-        endif ("${src}" MATCHES "\\.fl$")
-    endforeach(src)
-
-    set (FLUID_SOURCES)
-    if (flsrcs)
-        FLTK_RUN_FLUID(FLUID_SOURCES "${flsrcs}")
-    endif (flsrcs)
-
-    if (APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
-      unset (RESOURCE_PATH)
-      if (${tname} STREQUAL "blocks" OR ${tname} STREQUAL "checkers" OR ${tname} STREQUAL "sudoku")
-        set (ICON_NAME ${tname}.icns)
-        set (RESOURCE_PATH "${PROJECT_SOURCE_DIR}/test/${tname}.app/Contents/Resources/${ICON_NAME}")
-      elseif (${tname} STREQUAL "demo")
-        set (RESOURCE_PATH "${PROJECT_SOURCE_DIR}/test/demo.menu")
-      endif (${tname} STREQUAL "blocks" OR ${tname} STREQUAL "checkers" OR ${tname} STREQUAL "sudoku")
-
-      if (DEFINED RESOURCE_PATH)
-        add_executable(${tname} MACOSX_BUNDLE ${srcs} ${FLUID_SOURCES} ${RESOURCE_PATH})
-        if (${tname} STREQUAL "demo")
-          target_compile_definitions(demo PUBLIC USING_XCODE)
-        endif (${tname} STREQUAL "demo")
-      else ()
-        add_executable(${tname} MACOSX_BUNDLE ${srcs} ${FLUID_SOURCES})
-      endif (DEFINED RESOURCE_PATH)
-    else ()
-      add_executable(${tname} WIN32 ${srcs} ${FLUID_SOURCES})
-    endif (APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL))
-
-    set_target_properties(${tname}
-      PROPERTIES OUTPUT_NAME ${oname}
-    )
-    if (APPLE AND DEFINED RESOURCE_PATH)
-      if (NOT ${tname} STREQUAL "demo")
-        set_target_properties(${tname} PROPERTIES MACOSX_BUNDLE_ICON_FILE ${ICON_NAME})
-      endif (NOT ${tname} STREQUAL "demo")
-      set_target_properties(${tname} PROPERTIES RESOURCE ${RESOURCE_PATH})
-    endif (APPLE AND DEFINED RESOURCE_PATH)
-    if (APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL) AND ${tname} STREQUAL "editor")
-      set_target_properties("editor" PROPERTIES MACOSX_BUNDLE_INFO_PLIST "${PROJECT_SOURCE_DIR}/test/editor-Info.plist" )
-    endif(APPLE AND (NOT OPTION_APPLE_X11) AND (NOT OPTION_APPLE_SDL) AND ${tname} STREQUAL "editor")
-
-    target_link_libraries(${tname} ${LIBRARIES})
-
-    # CREATE_EXAMPLE can have an optional fourth argument with a list of options
-    # - the option ANDROID_OK is set if CREATE_EXAMPLE creates code for Androids
-    #   builds in addition to the native build
-    if (${ARGC} GREATER 3)
-      foreach(OPTION ${ARGV3})
-        if (${OPTION} STREQUAL ANDROID_OK AND OPTION_CREATE_ANDROID_STUDIO_IDE)
-          CREATE_ANDROID_IDE_FOR_TEST(${NAME} ${SOURCES} ${LIBRARIES})
-        endif()
-      endforeach()
-    endif()
-
-endmacro(CREATE_EXAMPLE NAME SOURCES LIBRARIES)
-
-#######################################################################