1ECM-TOOLCHAINS(7) Extra CMake Modules ECM-TOOLCHAINS(7)
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6 ecm-toolchains - ECM Toolchains Reference
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9 Extra CMake Modules (ECM) provides some toolchain modules. Unlike nor‐
10 mal modules, these are not included directly in projects, but specified
11 with the CMAKE_TOOLCHAIN_FILE cache variable on the commandline.
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14 AndroidToolchain
15 Enable easy compilation of cmake projects on Android.
16 By using this android toolchain, the projects will be set up to compile
18 the specified project targeting an Android platform, depending on its
19 input. Furthermore, if desired, an APK can be directly generated by
20 using the androiddeployqt tool.
21 CMake upstream has Android support now. This module will still give us
23 some useful features offering androiddeployqt integration and adequate
24 executables format for our Android applications.
25 Since we are using CMake Android support, any information from CMake
27 documentation still applies:
28 https://cmake.org/cmake/help/v3.7/manual/cmake-toolchains.7.html#cross-compiling-for-android
29 NOTE:
31 This module requires CMake 3.18.
32 Since 1.7.0.
34 Usage
36 To use this file, you need to set the CMAKE_TOOLCHAIN_FILE to point to
37 Android.cmake on the command line:
38 cmake -DCMAKE_TOOLCHAIN_FILE=/usr/share/ECM/toolchain/Android.cmake
40 You will also need to provide the locations of the Android NDK and SDK.
42 This can be done on the commandline or with environment variables; in
43 either case the variable names are:
44 CMAKE_ANDROID_NDK
46 The NDK root path.
47 ANDROID_SDK_ROOT
49 The SDK root path.
50 Additional options are specified as cache variables (eg: on the command
52 line):
53 ANDROID_ABI
55 The ABI to use. See the sources/cxx-stl/gnu-libstdc++/*/libs di‐
56 rectories in the NDK. Default: armeabi-v7a.
57 ANDROID_SDK_COMPILE_API
59 The platform API level to compile against. May be different from
60 the NDK target. Default: newest installed version (e.g. an‐
61 droid-30).
62 ANDROID_SDK_BUILD_TOOLS_REVISION
64 The build tools version to use. Default: newest installed ver‐
65 sion (e.g. 30.0.2).
66 ANDROID_EXTRA_LIBS
68 The “;”-separated list of full paths to libs to include in re‐
69 sulting APK.
70 For integrating other libraries which are not part of the Android
72 toolchain, like Qt5, and installed to a separate prefix on the host
73 system, the install prefixes of those libraries would be passed as al‐
74 ternative roots as list via ECM_ADDITIONAL_FIND_ROOT_PATH. Since
75 5.30.0.
76 For example, for integrating a Qt5 for Android present at
78 ~/Qt/5.14.2/android/ and some other libraries installed to the prefix
79 /opt/android/foo, you would use:
80 cmake \
82 -DCMAKE_TOOLCHAIN_FILE=/usr/share/ECM/toolchain/Android.cmake \
83 -DECM_ADDITIONAL_FIND_ROOT_PATH="~/Qt/5.14.2/android/;/opt/android/foo"
84 If your project uses find_package() to locate build tools on the host
86 system, make sure to pass CMAKE_FIND_ROOT_PATH_BOTH or
87 NO_CMAKE_FIND_ROOT_PATH as argument in the call. See the find_package()
88 documentation for more details.
89 Deploying Qt Applications
91 After building the application, you will need to generate an APK that
92 can be deployed to an Android device. This module integrates androidde‐
93 ployqt support to help with this for Qt-based projects. To enable this,
94 set the QTANDROID_EXPORTED_TARGET variable to the targets you wish to
95 export as an APK (in a ;-separed list), as well as ANDROID_APK_DIR to a
96 directory containing some basic information. This will create a cre‐
97 ate-apk-<target> target that will generate the APK file. See the Qt on
98 Android deployment documentation for more information.
99 For example, you could do:
101 cmake \
103 -DCMAKE_TOOLCHAIN_FILE=/usr/share/ECM/toolchain/Android.cmake \
104 -DQTANDROID_EXPORTED_TARGET=myapp \
105 -DANDROID_APK_DIR=myapp-apk
106 make
107 make create-apk-myapp
108 You can specify the APK output directory by setting ANDROID_APK_OUT‐
110 PUT_DIR. Otherwise the APK can be found in myapp_build_apk/ in the
111 build directory.
112 The create-apk-myapp target will be able to take an ARGS parameter with
114 further arguments for androiddeployqt. For example, one can use:
115 make create-apk-myapp ARGS="--install"
117 To install the apk to test. To generate a signed apk, one can do it
119 with the following syntax:
120 make create-apk-myapp ARGS="--sign ~/my.keystore alias_name"
122 In case it’s needed for your application to set the APK directory from
124 cmake scripting you can also set the directory as the ANDROID_APK_DIR
125 property of the create-apk-myapp target.
126 See Android documentation on how to create a keystore to use
128 Advanced Options
130 The following packaging options are mainly interesting for automation
131 or integration with CI/CD pipelines: ANDROID_APK_OUTPUT_DIR
132 Specifies a folder where the generated APK files should be placed.
133 ANDROID_FASTLANE_METADATA_OUTPUT_DIR
135 Specifies a folder where the generated metadata for the F-Droid
136 store should be placed.
137 ANDROIDDEPLOYQT_EXTRA_ARGS
139 Allows to pass additional arguments to androiddeployqt. This is
140 an alternative to the ARGS= argument for make and unlike that
141 works with all CMake generators.
142
144 ecm(7)
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147 KDE Developers
1485.82 May 03, 2021 ECM-TOOLCHAINS(7)