Commit 3e9ce09a authored by Brad King's avatar Brad King Committed by Kitware Robot

Merge topic 'ios-docs'

376138fe Help: CMAKE_MACOSX_BUNDLE is ON for iOS/tvOS/watchOS
f7d602b5 Help: Example of tweaking iOS/tvOS/watchOS build
4a9e2e4f Help: find_package with fat iOS libraries
Acked-by: Kitware Robot's avatarKitware Robot <kwrobot@kitware.com>
Merge-request: !3047
parents 742339a7 376138fe
......@@ -556,6 +556,54 @@ command is sufficient:
cmake .. -GXcode -DCMAKE_SYSTEM_NAME=iOS
Variable :variable:`CMAKE_OSX_ARCHITECTURES` can be used to set architectures
for both device and simulator. Variable :variable:`CMAKE_OSX_DEPLOYMENT_TARGET`
can be used to set an iOS/tvOS/watchOS deployment target.
Next configuration will install fat 5 architectures iOS library
and add the ``-miphoneos-version-min=9.3``/``-mios-simulator-version-min=9.3``
flags to the compiler:
.. code-block:: console
$ cmake -S. -B_builds -GXcode \
-DCMAKE_SYSTEM_NAME=iOS \
"-DCMAKE_OSX_ARCHITECTURES=armv7;armv7s;arm64;i386;x86_64" \
-DCMAKE_OSX_DEPLOYMENT_TARGET=9.3 \
-DCMAKE_INSTALL_PREFIX=`pwd`/_install \
-DCMAKE_XCODE_ATTRIBUTE_ONLY_ACTIVE_ARCH=NO \
-DCMAKE_IOS_INSTALL_COMBINED=YES
Example:
.. code-block:: cmake
# CMakeLists.txt
cmake_minimum_required(VERSION 3.14)
project(foo)
add_library(foo foo.cpp)
install(TARGETS foo DESTINATION lib)
Install:
.. code-block:: console
$ cmake --build _builds --config Release --target install
Check library:
.. code-block:: console
$ lipo -info _install/lib/libfoo.a
Architectures in the fat file: _install/lib/libfoo.a are: i386 armv7 armv7s x86_64 arm64
.. code-block:: console
$ otool -l _install/lib/libfoo.a | grep -A2 LC_VERSION_MIN_IPHONEOS
cmd LC_VERSION_MIN_IPHONEOS
cmdsize 16
version 9.3
Code Signing
^^^^^^^^^^^^
......@@ -592,4 +640,14 @@ Please note that checks made during configuration were performed against
the configure-time SDK and might not hold true for other SDKs. Commands
like :command:`find_package`, :command:`find_library`, etc. store and use
details only for the configured SDK/platform, so they can be problematic
if wanting to switch between device and simulator builds.
if wanting to switch between device and simulator builds. You can follow
the next rules to make device + simulator configuration work:
- Use explicit ``-l`` linker flag,
e.g. ``target_link_libraries(foo PUBLIC "-lz")``
- Use explicit ``-framework`` linker flag,
e.g. ``target_link_libraries(foo PUBLIC "-framework CoreFoundation")``
- Use :command:`find_package` only for libraries installed with
:variable:`CMAKE_IOS_INSTALL_COMBINED` feature
......@@ -5,3 +5,6 @@ Default value for :prop_tgt:`MACOSX_BUNDLE` of targets.
This variable is used to initialize the :prop_tgt:`MACOSX_BUNDLE` property on
all the targets. See that target property for additional information.
This variable is set to ``ON`` by default if :variable:`CMAKE_SYSTEM_NAME`
equals to :ref:`iOS, tvOS or watchOS <Cross Compiling for iOS, tvOS, or watchOS>`.
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