CMake: Raise cmake_minimum_required from 3.12 to 3.15

Remove code that checks CMake versions lower than 3.15
2023-11-15 21:30:12 +01:00 · 2023-11-15 21:30:12 +01:00 · 6f021d4830
commit 6f021d4830
parent ed7c2f1464
8 changed files with 25 additions and 50 deletions
--- a/CMake/compatibility.cmake
+++ b/CMake/compatibility.cmake
@ -1,7 +1,7 @@
 #
 # CMake compatibility functions and macros for the Fast Light Tool Kit (FLTK)
 #
-# Copyright 1998-2021 by Bill Spitzak and others.
+# Copyright 1998-2023 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
@ -16,7 +16,7 @@

 ################################################################################
 #
-# The functions (and macros) in this file are defined to simplify CMake
+# The functions and maybe macros in this file are defined to simplify CMake
 # code that uses features not available in all supported CMake versions.
 # Functions should be preferred (rather than macros) because functions
 # have their own variable scope.
@ -33,6 +33,12 @@
 #
 ################################################################################

+
+# Right now we don't need compatibility functions
+# This file is currently "empty" but left for documentation purposes
+# An example function documentation follows...
+
+
 ################################################################################
 #
 # function fl_target_link_directories - add link directories to target
@ -62,13 +68,3 @@
 #   can be an empty list.
 #
 ################################################################################
-
-function (fl_target_link_directories TARGET SCOPE DIRS)
-
-  if (CMAKE_VERSION VERSION_LESS "3.13")
-    link_directories (${DIRS})
-  else ()
-    target_link_directories (${TARGET} ${SCOPE} ${DIRS})
-  endif ()
-
-endfunction () # fl_target_link_directories()
--- a/CMake/fl_create_example.cmake
+++ b/CMake/fl_create_example.cmake
@ -125,7 +125,7 @@ function (CREATE_EXAMPLE NAME SOURCES LIBRARIES)
  endif ()

  if (FLTK_HAVE_CAIRO AND PKG_CAIRO_LIBRARY_DIRS)
-    fl_target_link_directories (${TARGET_NAME} PUBLIC ${PKG_CAIRO_LIBRARY_DIRS})
+    target_link_directories (${TARGET_NAME} PUBLIC ${PKG_CAIRO_LIBRARY_DIRS})
  endif ()

  if (USE_GDIPLUS)        # can only be true on Windows
--- a/CMake/options.cmake
+++ b/CMake/options.cmake
@ -536,7 +536,7 @@ if (OPTION_USE_GL)
    unset(HAVE_GL_GLU_H CACHE)
    find_file (HAVE_GL_GLU_H GL/glu.h PATHS ${X11_INCLUDE_DIR})
  else()
-    include (FindOpenGL)
+    find_package(OpenGL)
    if (APPLE)
      set (HAVE_GL_GLU_H ${HAVE_OPENGL_GLU_H})
    endif (APPLE)
--- a/CMake/setup.cmake
+++ b/CMake/setup.cmake
@ -82,11 +82,9 @@ 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()
+  # Tell Xcode to regenerate scheme information automatically whenever the
+  # CMake configuration changes without asking the user
+  set (CMAKE_XCODE_GENERATE_SCHEME 1)
 endif()

 if (APPLE)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -25,23 +25,9 @@
 #         at least CMake 3.12.0
 # Note 2: Used in fluid since 05/2023,
 #         used for Windows (MSVC) shared lib builds much earlier
+# Note 3: More modern CMake features require 3.13...3.15 (Nov 2023)

-cmake_minimum_required (VERSION 3.12.0 FATAL_ERROR) # 05/2023
-
-#######################################################################
-
-# Use "legacy mode" of FindOpenGL (avoid CMake developer warning).
-# Note: we're using FindOpenGL with `OPENGL_LIBRARIES` and not (yet)
-# the `OpenGL::GL` target. This may be changed in the future.
-# See https://cmake.org/cmake/help/latest/policy/CMP0072.html
-# Update Feb 28, 2021: To avoid a warning about "OLD" policies we set
-# OpenGL_GL_PREFERENCE directly to "LEGACY" (other option: "GLVND").
-
-# if (POLICY CMP0072)
-#   cmake_policy (SET CMP0072 OLD)
-# endif ()
-
-set (OpenGL_GL_PREFERENCE LEGACY)
+cmake_minimum_required (VERSION 3.15.0 FATAL_ERROR)

 #######################################################################
 # define the FLTK project and version
@ -56,7 +42,9 @@ project (FLTK VERSION 1.4.0)
 include (CMake/fl_debug_var.cmake)
 include (CMake/fl_debug_pkg.cmake)
 include (CMake/fl_add_library.cmake)
-include (CMake/compatibility.cmake)
+
+# right now we don't use compatibility functions
+# include (CMake/compatibility.cmake)

 if (0)
  fl_debug_var (FLTK_VERSION_MAJOR)
--- a/fltk-options/CMakeLists.txt
+++ b/fltk-options/CMakeLists.txt
@ -53,7 +53,7 @@ endif ()

 # we must link fltk-optons with cairo if option CAIRO is enabled
 if (FLTK_HAVE_CAIRO)
-  fl_target_link_directories (fltk-options PRIVATE "${PKG_CAIRO_LIBRARY_DIRS}")
+  target_link_directories (fltk-options PRIVATE ${PKG_CAIRO_LIBRARY_DIRS})
 endif (FLTK_HAVE_CAIRO)

 if (USE_GDIPLUS)        # can only be true on Windows
@ -71,7 +71,7 @@ if (WIN32)
  add_executable (fltk-options-cmd ${CPPFILES} ${HEADERFILES})
  target_link_libraries (fltk-options-cmd ${FLTK_OPTIONS_LIBS})
  if (FLTK_HAVE_CAIRO)
-    fl_target_link_directories (fltk-options-cmd PRIVATE "${PKG_CAIRO_LIBRARY_DIRS}")
+    target_link_directories (fltk-options-cmd PRIVATE ${PKG_CAIRO_LIBRARY_DIRS})
  endif (FLTK_HAVE_CAIRO)
 endif ()

--- a/fluid/CMakeLists.txt
+++ b/fluid/CMakeLists.txt
@ -168,7 +168,7 @@ endif ()
 if (FLTK_HAVE_CAIRO)
  target_include_directories (fluid PRIVATE ${PKG_CAIRO_INCLUDE_DIRS})
  if (PKG_CAIRO_LIBRARY_DIRS)
-    fl_target_link_directories (fluid PRIVATE ${PKG_CAIRO_LIBRARY_DIRS})
+    target_link_directories (fluid PRIVATE ${PKG_CAIRO_LIBRARY_DIRS})
  endif ()
 endif (FLTK_HAVE_CAIRO)

@ -191,7 +191,7 @@ if (WIN32)
  if (FLTK_HAVE_CAIRO)
    target_include_directories (fluid-cmd PRIVATE ${PKG_CAIRO_INCLUDE_DIRS})
    if (PKG_CAIRO_LIBRARY_DIRS)
-      fl_target_link_directories (fluid-cmd PRIVATE ${PKG_CAIRO_LIBRARY_DIRS})
+      target_link_directories (fluid-cmd PRIVATE ${PKG_CAIRO_LIBRARY_DIRS})
    endif ()
  endif (FLTK_HAVE_CAIRO)
 endif (WIN32)
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@ -644,14 +644,7 @@ if (USE_XFT)
 endif (USE_XFT)

 if (UNIX AND OPTION_USE_WAYLAND)
-  if (NOT (CMAKE_VERSION VERSION_LESS 3.4))
-    pkg_get_variable(PROTOCOLS wayland-protocols pkgdatadir) # requires cmake 3.4
-  else()
-    execute_process(COMMAND pkg-config --variable=pkgdatadir wayland-protocols
-      OUTPUT_VARIABLE PROTOCOLS)
-    # strip trailing newline
-    string (REPLACE "\n" "" PROTOCOLS ${PROTOCOLS})
-  endif (NOT (CMAKE_VERSION VERSION_LESS 3.4))
+  pkg_get_variable(PROTOCOLS wayland-protocols pkgdatadir)
  # replace "//" with "/"
  string (REPLACE "//" "/" PROTOCOLS ${PROTOCOLS})
  if (NOT(EXISTS ${PROTOCOLS}/stable/xdg-shell/xdg-shell.xml))
@ -737,7 +730,7 @@ FL_ADD_LIBRARY (fltk STATIC "${STATIC_FILES}")
 target_link_libraries (fltk ${OPTIONAL_LIBS})

 if (FLTK_HAVE_CAIRO)
-  fl_target_link_directories (fltk PUBLIC "${PKG_CAIRO_LIBRARY_DIRS}")
+  target_link_directories (fltk PUBLIC ${PKG_CAIRO_LIBRARY_DIRS})
 endif()

 #######################################################################
@ -785,7 +778,7 @@ if (OPTION_BUILD_SHARED_LIBS AND NOT MSVC)

  FL_ADD_LIBRARY (fltk SHARED "${SHARED_FILES}")
  target_link_libraries (fltk_SHARED ${OPTIONAL_LIBS} ${PKG_CAIRO_LIBRARIES})
-  fl_target_link_directories (fltk_SHARED PUBLIC "${PKG_CAIRO_LIBRARY_DIRS}")
+  target_link_directories (fltk_SHARED PUBLIC ${PKG_CAIRO_LIBRARY_DIRS})

  ###################################################################