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Merge topic 'doc-toolchains' 

27022166 Help: Add Windows Phone/Store cross-compiling to cmake-toolchains.7
db54d872 Help: Add Windows CE cross-compiling to cmake-toolchains.7 manual
0d72451a Help: Add Cross Compiling subsections in cmake-toolchains.7 manual
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Brad King 2014-09-22 09:13:17 -04:00 committed by CMake Topic Stage
parent 405b92d031 2702216637
commit 829e9eca04
1 changed files with 75 additions and 11 deletions
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Help/manual/cmake-toolchains.7.rst
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@ -97,12 +97,20 @@ Cross Compiling
If :manual:`cmake(1)` is invoked with the command line parameter
``-DCMAKE_TOOLCHAIN_FILE=path/to/file``, the file will be loaded early to set
values for the compilers. A typical cross-compiling toolchain has content such
values for the compilers.
The :variable:`CMAKE_CROSSCOMPILING` variable is set to true when CMake is
cross-compiling.
Cross Compiling for Linux
-------------------------
A typical cross-compiling toolchain for Linux has content such
as:
.. code-block:: cmake
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_SYSROOT /home/devel/rasp-pi-rootfs)
set(CMAKE_STAGING_PREFIX /home/devel/stage)
@ -118,6 +126,9 @@ as:
The :variable:`CMAKE_SYSTEM_NAME` is the CMake-identifier of the target platform
to build for.
The :variable:`CMAKE_SYSTEM_PROCESSOR` is the CMake-identifier of the target architecture
to build for.
The :variable:`CMAKE_SYSROOT` is optional, and may be specified if a sysroot
is available.
@ -139,13 +150,17 @@ target system prefixes, whereas executables which must be run as part of the bui
should be found only on the host and not on the target. This is the purpose of
the ``CMAKE_FIND_ROOT_PATH_MODE_*`` variables.
Some compilers are inherently cross compilers, such as Clang and the QNX QCC
compiler. The :variable:`CMAKE_<LANG>_COMPILER_TARGET` can be set to pass a
Cross Compiling using Clang
---------------------------
Some compilers such as Clang are inherently cross compilers.
The :variable:`CMAKE_<LANG>_COMPILER_TARGET` can be set to pass a
value to those supported compilers when compiling:
.. code-block:: cmake
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(triple arm-linux-gnueabihf)
@ -154,7 +169,18 @@ value to those supported compilers when compiling:
set(CMAKE_CXX_COMPILER clang++)
set(CMAKE_CXX_COMPILER_TARGET ${triple})
Or, for QCC:
Similarly, some compilers do not ship their own supplementary utilities
such as linkers, but provide a way to specify the location of the external
toolchain which will be used by the compiler driver. The
:variable:`CMAKE_<LANG>_COMPILER_EXTERNAL_TOOLCHAIN` variable can be set in a
toolchain file to pass the path to the compiler driver.
Cross Compiling for QNX
-----------------------
As the Clang compiler the QNX QCC compile is inherently a cross compiler.
And the :variable:`CMAKE_<LANG>_COMPILER_TARGET` can be set to pass a
value to those supported compilers when compiling:
.. code-block:: cmake
@ -167,12 +193,50 @@ Or, for QCC:
set(CMAKE_CXX_COMPILER QCC)
set(CMAKE_CXX_COMPILER_TARGET ${arch})
Cross Compiling for Windows CE
------------------------------
Similarly, some compilers do not ship their own supplementary utilities
such as linkers, but provide a way to specify the location of the external
toolchain which will be used by the compiler driver. The
:variable:`CMAKE_<LANG>_COMPILER_EXTERNAL_TOOLCHAIN` variable can be set in a
toolchain file to pass the path to the compiler driver.
Cross compiling for Windows CE requires the corresponding SDK being
installed on your system. These SDKs are usually installed under
``C:/Program Files (x86)/Windows CE Tools/SDKs``.
The :variable:`CMAKE_CROSSCOMPILING` variable is set to true when CMake is
cross-compiling.
A toolchain file to configure a Visual Studio generator for
Windows CE may look like this:
.. code-block:: cmake
set(CMAKE_SYSTEM_NAME WindowsCE)
set(CMAKE_SYSTEM_VERSION 8.0)
set(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_GENERATOR_TOOLSET CE800) # Can be omitted for 8.0
set(CMAKE_GENERATOR_PLATFORM SDK_AM335X_SK_WEC2013_V310)
The :variable:`CMAKE_GENERATOR_PLATFORM` tells the generator which SDK to use.
Further :variable:`CMAKE_SYSTEM_VERSION` tells the generator what version of
Windows CE to use. Currently version 8.0 (Windows Embedded Compact 2013) is
supported out of the box. Other versions may require one to set
:variable:`CMAKE_GENERATOR_TOOLSET` to the correct value.
Cross Compiling for Windows Phone
---------------------------------
A toolchain file to configure a Visual Studio generator for
Windows Phone may look like this:
.. code-block:: cmake
set(CMAKE_SYSTEM_NAME WindowsPhone)
set(CMAKE_SYSTEM_VERSION 8.1)
Cross Compiling for Windows Store
---------------------------------
A toolchain file to configure a Visual Studio generator for
Windows Store may look like this:
.. code-block:: cmake
set(CMAKE_SYSTEM_NAME WindowsStore)
set(CMAKE_SYSTEM_VERSION 8.1)