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Basic CMakeLists.txt file to build FLTK-based user program. 

The change is mostly concerned with showing how to build
a macOS bundled app, in addition to X11 and Windows support.
This commit is contained in:
ManoloFLTK 2020-11-23 17:22:45 +01:00
parent 018134161d
commit c7274294ae
1 changed files with 14 additions and 11 deletions
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25
README.CMake.txt
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@ -454,7 +454,7 @@ Here is a basic CMakeLists.txt file using FLTK.
------
cmake_minimum_required(VERSION 2.6.3)
cmake_minimum_required(VERSION 3.2.3)
project(hello)
@ -471,10 +471,14 @@ set(FLTK_DIR /path/to/fltk)
find_package(FLTK REQUIRED NO_MODULE)
include_directories(${FLTK_INCLUDE_DIRS})
if (APPLE)
add_executable(hello MACOSX_BUNDLE hello.cxx)
target_link_libraries(hello "-framework cocoa")
else ()
add_executable(hello WIN32 hello.cxx)
endif (APPLE)
add_executable(hello WIN32 hello.cxx)
# target_include_directories(hello PUBLIC ${FLTK_INCLUDE_DIRS})
target_include_directories(hello PUBLIC ${FLTK_INCLUDE_DIRS})
target_link_libraries(hello fltk)
@ -487,16 +491,15 @@ means that it is an error if it's not found. NO_MODULE tells it to search
only for the FLTKConfig file, not using the FindFLTK.cmake supplied with
CMake, which doesn't work with this version of FLTK.
The add_executable() command takes one form for the macOS platform
and another for other platforms (Yes, WIN32 can be used also for the X11 platform).
Once the package is found the CMake variable FLTK_INCLUDE_DIRS is defined
which can be used to add the FLTK include directories to the definitions
used to compile your program. In older CMake versions you may need to use
`include_directories()` as shown above. In more recent CMake versions you
can use the (commented) `target_include_directories()` command. The latter
should be preferred (YMMV, see the CMake docs).
used to compile your program using the `target_include_directories()` command.
The WIN32 in the add_executable tells your Windows compiler that this is
a Windows GUI app. It is ignored on other platforms and should always be
present with FLTK GUI programs for better portability.
The target_link_libraries() command is used to specify all necessary FLTK
libraries. Thus, you may have to add fltk_images, fltk_gl, etc…
Note: the variable FLTK_USE_FILE used to include another file in
previous FLTK versions was deprecated since FLTK 1.3.4 and will be