All mobile-compatible examples now successfully link

CMakeLists.txt

@@ -84,7 +84,7 @@ if(SFML_BUILD_WINDOW)
     sfml_set_option(SFML_OPENGL_ES ${OPENGL_ES} BOOL "TRUE to use an OpenGL ES implementation, FALSE to use a desktop OpenGL implementation")
 endif()
 
-# Mac OS X specific options
+# macOS specific options
 if(SFML_OS_MACOSX)
     # add an option to build frameworks instead of dylibs (release only)
     sfml_set_option(SFML_BUILD_FRAMEWORKS FALSE BOOL "TRUE to build SFML as frameworks libraries (release only), FALSE to build according to BUILD_SHARED_LIBS")
@@ -99,6 +99,14 @@ else()
     sfml_set_option(SFML_DEPENDENCIES_INSTALL_PREFIX "." PATH "External libraries (FLAC, Freetype, Vorbis, ...) installation directory")
 endif()
 
+# iOS specific options
+if(SFML_OS_IOS)
+    # At the moment the minimal deployement target version is 10.2 only because the externals for iOS were built with that requirement.
+    sfml_set_option(SFML_IOS_DEPLOYMENT_TARGET "10.2" STRING "The minimal iOS version that will be able to run the built binaries. Cannot be lower than 10.2.")
+
+    sfml_set_option(SFML_CODE_SIGN_IDENTITY "iPhone Developer" STRING "The code signing identity to use when building for a real device")
+endif()
+
 # Android options
 if(SFML_OS_ANDROID)
     # make sure there's the android library available

cmake/Macros.cmake

@@ -27,6 +27,23 @@ function(sfml_set_stdlib target)
     endif()
 endfunction()
 
+function(sfml_set_common_ios_properties target)
+    # enable automatic reference counting on iOS
+    sfml_set_xcode_property(${target} CLANG_ENABLE_OBJC_ARC YES)
+    sfml_set_xcode_property(${target} IPHONEOS_DEPLOYMENT_TARGET "${SFML_IOS_DEPLOYMENT_TARGET}")
+    sfml_set_xcode_property(${target} CODE_SIGN_IDENTITY "${SFML_CODE_SIGN_IDENTITY}")
+
+    get_target_property(target_type ${target} TYPE)
+    if (target_type STREQUAL "EXECUTABLE")
+        set_target_properties(${target} PROPERTIES
+            MACOSX_BUNDLE TRUE # Bare executables are not usable on iOS, only bundle applications
+            MACOSX_BUNDLE_GUI_IDENTIFIER "org.sfml-dev.${target}" # If missing, trying to launch an example in simulator will make Xcode < 9.3 crash
+            MACOSX_BUNDLE_BUNDLE_NAME "${target}"
+            MACOSX_BUNDLE_LONG_VERSION_STRING "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}"
+        )
+    endif()
+endfunction()
+
 # add a new target which is a SFML library
 # example: sfml_add_library(sfml-graphics
 #                           SOURCES sprite.cpp image.cpp ...
@@ -140,9 +157,8 @@ macro(sfml_add_library target)
         endif()
     endif()
 
-    # enable automatic reference counting on iOS
     if (SFML_OS_IOS)
-        set_target_properties(${target} PROPERTIES XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_ARC YES)
+        sfml_set_common_ios_properties(${target})
     endif()
 
     # sfml-activity library is our bootstrap activity and must not depend on stlport_shared
@@ -241,6 +257,10 @@ macro(sfml_add_example target)
                               INSTALL_RPATH "$ORIGIN/${rel_lib_dir}")
     endif()
 
+    if (SFML_OS_IOS)
+        sfml_set_common_ios_properties(${target})
+    endif()
+
     # add the install rule
     install(TARGETS ${target}
             RUNTIME DESTINATION ${target_install_dir} COMPONENT examples
@@ -266,12 +286,13 @@ macro(sfml_add_example target)
 endmacro()
 
 
-# Find the requested package and make an INTERFACE library from it
-# Usage: sfml_find_package(wanted_target_name
-#                          [INCLUDE "OPENGL_INCLUDE_DIR"]
-#                          [LINK "OPENGL_gl_LIBRARY"])
-function(sfml_find_package)
-    set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/Modules/")
+# Create an interface library for an external dependency. This virtual target can provide
+# link specifications and include directories to be used by dependees.
+# The created INTERFACE library is tagged for export to be part of the generated SFMLConfig
+# Usage: sfml_add_external(target_name
+#                          [INCLUDE "extlibs/include"]
+#                          [LINK "extlibs/libfoo/libfoo.a"])
+function(sfml_add_external)
     list(GET ARGN 0 target)
     list(REMOVE_AT ARGN 0)
 
@@ -284,16 +305,10 @@ function(sfml_find_package)
         message(FATAL_ERROR "Unknown arguments when calling sfml_import_library: ${THIS_UNPARSED_ARGUMENTS}")
     endif()
 
-    if (SFML_OS_IOS)
-        find_host_package(${target} REQUIRED)
-    else()
-        find_package(${target} REQUIRED)
-    endif()
-
     add_library(${target} INTERFACE)
 
     if (THIS_INCLUDE)
-        foreach(include_dir IN LISTS "${THIS_INCLUDE}")
+        foreach(include_dir IN LISTS THIS_INCLUDE)
             if (NOT include_dir)
                 message(FATAL_ERROR "No path given for include dir ${THIS_INCLUDE}")
             endif()
@@ -302,16 +317,61 @@ function(sfml_find_package)
     endif()
 
     if (THIS_LINK)
-        foreach(link_item IN LISTS ${THIS_LINK})
+        foreach(link_item IN LISTS THIS_LINK)
             if (NOT link_item)
                 message(FATAL_ERROR "Missing item in ${THIS_LINK}")
             endif()
             target_link_libraries(${target} INTERFACE "$<BUILD_INTERFACE:${link_item}>")
         endforeach()
     endif()
+
     install(TARGETS ${target} EXPORT SFMLConfigExport)
 endfunction()
 
+# Find the requested package and make an INTERFACE library from it
+# The created INTERFACE library is tagged for export to be part of the generated SFMLConfig
+# Usage: sfml_find_package(wanted_target_name
+#                          [INCLUDE "OPENGL_INCLUDE_DIR"]
+#                          [LINK "OPENGL_gl_LIBRARY"])
+function(sfml_find_package)
+    list(GET ARGN 0 target)
+    list(REMOVE_AT ARGN 0)
+
+    if (TARGET ${target})
+        message(FATAL_ERROR "Target '${target}' is already defined")
+    endif()
+
+    cmake_parse_arguments(THIS "" "" "INCLUDE;LINK" ${ARGN})
+    if (THIS_UNPARSED_ARGUMENTS)
+        message(FATAL_ERROR "Unknown arguments when calling sfml_import_library: ${THIS_UNPARSED_ARGUMENTS}")
+    endif()
+
+    set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/Modules/")
+    if (SFML_OS_IOS)
+        find_host_package(${target} REQUIRED)
+    else()
+        find_package(${target} REQUIRED)
+    endif()
+
+    # Make sure to interpret the items in INCLUDE and LINK parameters. sfml_add_external()
+    # does not interpret given items in order to also accept parameters that must not be interpreted
+    set(LINK_LIST "")
+    if (THIS_LINK)
+        foreach(link_item IN LISTS THIS_LINK)
+            list(APPEND LINK_LIST "${${link_item}}")
+        endforeach()
+    endif()
+
+    set(INCLUDE_LIST "")
+    if (THIS_INCLUDE)
+        foreach(include_dir IN LISTS THIS_INCLUDE)
+            list(APPEND INCLUDE_LIST "${${include_dir}}")
+        endforeach()
+    endif()
+
+    sfml_add_external(${target} INCLUDE ${INCLUDE_LIST} LINK ${LINK_LIST})
+endfunction()
+
 # Generate a SFMLConfig.cmake file (and associated files) from the targets registered against
 # the EXPORT name "SFMLConfigExport" (EXPORT parameter of install(TARGETS))
 function(sfml_export_targets)

examples/CMakeLists.txt

@@ -1,10 +1,7 @@
 
-# iOS Demo
-if(SFML_OS_IOS)
-    add_subdirectory(iOS)
-else(SFML_OS_IOS)
 
-    # add the examples subdirectories
+# CLI based examples
+if (NOT SFML_OS_IOS)
     if(SFML_BUILD_NETWORK)
         add_subdirectory(ftp)
         add_subdirectory(sockets)
@@ -16,13 +13,19 @@ else(SFML_OS_IOS)
         add_subdirectory(sound)
         add_subdirectory(sound_capture)
     endif()
-    if(SFML_BUILD_WINDOW)
+endif()
+
+# GUI based examples
+if(SFML_BUILD_WINDOW)
     add_subdirectory(window)
-    endif()
-    if(SFML_BUILD_GRAPHICS)
-        add_subdirectory(joystick)
+endif()
+
+if(SFML_BUILD_GRAPHICS)
     add_subdirectory(opengl)
+    if (NOT SFML_OS_IOS)
+        add_subdirectory(joystick)
         add_subdirectory(shader)
+    endif()
     add_subdirectory(island)
     if(SFML_OS_WINDOWS)
         add_subdirectory(win32)
@@ -31,8 +34,12 @@ else(SFML_OS_IOS)
     elseif(SFML_OS_MACOSX)
         add_subdirectory(cocoa)
     endif()
-    endif()
-    if(SFML_BUILD_GRAPHICS AND SFML_BUILD_AUDIO)
+endif()
+if(SFML_BUILD_GRAPHICS AND SFML_BUILD_AUDIO)
     add_subdirectory(pong)
-    endif()
-endif(SFML_OS_IOS)
+endif()
+
+# Mobile specific examples
+if(SFML_OS_IOS)
+    add_subdirectory(iOS)
+endif()

examples/opengl/OpenGL.cpp

@@ -5,6 +5,15 @@
 #include <SFML/Graphics.hpp>
 #include <SFML/OpenGL.hpp>
 
+#ifdef SFML_SYSTEM_IOS
+#include <SFML/Main.hpp>
+#endif
+
+#ifdef SFML_OPENGL_ES
+#define glClearDepth glClearDepthf
+#define glFrustum glFrustumf
+#endif
+
 #ifndef GL_SRGB8_ALPHA8
 #define GL_SRGB8_ALPHA8 0x8C43
 #endif

examples/window/Window.cpp

@@ -4,6 +4,14 @@
 #include <SFML/Window.hpp>
 #include <SFML/OpenGL.hpp>
 
+#ifdef SFML_SYSTEM_IOS
+#include <SFML/Main.hpp>
+#endif
+
+#ifdef SFML_OPENGL_ES
+#define glClearDepth glClearDepthf
+#define glFrustum glFrustumf
+#endif
 
 ////////////////////////////////////////////////////////////
 /// Entry point of application

src/SFML/Graphics/CMakeLists.txt

@@ -132,6 +132,8 @@ endif()
 
 if(SFML_OS_ANDROID)
     target_link_libraries(sfml-graphics PRIVATE z EGL GLESv1_CM)
+elseif(SFML_OS_IOS)
+    target_link_libraries(sfml-graphics PRIVATE z bz2)
 endif()
 
 sfml_find_package(Freetype INCLUDE "FREETYPE_INCLUDE_DIRS" LINK "FREETYPE_LIBRARY")

src/SFML/Window/CMakeLists.txt

@@ -251,14 +251,14 @@ endif()
 
 if(SFML_OPENGL_ES)
     if(SFML_OS_IOS)
-        target_link_libraries(sfml-window PRIVATE "-framework OpenGLES")
+        sfml_add_external(OpenGL LINK "-framework OpenGLES")
     elseif(SFML_OS_ANDROID)
-        target_link_libraries(sfml-window PRIVATE EGL GLESv1_CM)
+        sfml_add_external(OpenGL LINK "EGL" "GLESv1_CM")
     endif()
 else()
-    sfml_find_package(OpenGL INCLUDE "OPENGL_INCLUDE_DIR" LINK "OPENGL_LIBRARIES")
-    target_link_libraries(sfml-window PRIVATE OpenGL)
+    sfml_find_package(OpenGL INCLUDE "OPENGL_INCLUDE_DIR" LINK "OPENGL_gl_LIBRARY")
 endif()
+target_link_libraries(sfml-window PRIVATE OpenGL)
 
 if(SFML_OS_WINDOWS AND NOT SFML_COMPILER_MSVC)
     include(CheckIncludeFile)