Commit 17cef380 authored by Brad King's avatar Brad King

VS: Add support for explicit 32-bit toolset selection via host=x86

Generalize the ``host=x64`` option in `CMAKE_GENERATOR_TOOLSET`
to also support ``host=x86``.
parent bf774e52
For each toolset that comes with this version of Visual Studio, there are
variants that are themselves compiled for 32-bit (x86) and 64-bit (x64) hosts
(independent of the architecture they target). By default Visual Studio
chooses the 32-bit variant even on a 64-bit host. One may request use of the
64-bit host tools by adding a ``host=x64`` option to the toolset specification.
(independent of the architecture they target).
|VS_TOOLSET_HOST_ARCH_DEFAULT|
One may explicitly request use of either the 32-bit or 64-bit host tools
by adding either ``host=x86`` or ``host=x64`` to the toolset specification.
See the :variable:`CMAKE_GENERATOR_TOOLSET` variable for details.
......@@ -42,4 +42,7 @@ The ``v120`` toolset that comes with Visual Studio 12 2013 is selected by
default. The :variable:`CMAKE_GENERATOR_TOOLSET` option may be set, perhaps
via the :manual:`cmake(1)` ``-T`` option, to specify another toolset.
.. |VS_TOOLSET_HOST_ARCH_DEFAULT| replace::
By default this generator uses the 32-bit variant even on a 64-bit host.
.. include:: VS_TOOLSET_HOST_ARCH.txt
......@@ -39,4 +39,7 @@ The ``v140`` toolset that comes with Visual Studio 14 2015 is selected by
default. The :variable:`CMAKE_GENERATOR_TOOLSET` option may be set, perhaps
via the :manual:`cmake(1)` ``-T`` option, to specify another toolset.
.. |VS_TOOLSET_HOST_ARCH_DEFAULT| replace::
By default this generator uses the 32-bit variant even on a 64-bit host.
.. include:: VS_TOOLSET_HOST_ARCH.txt
......@@ -56,4 +56,7 @@ The ``v141`` toolset that comes with Visual Studio 15 2017 is selected by
default. The :variable:`CMAKE_GENERATOR_TOOLSET` option may be set, perhaps
via the :manual:`cmake(1)` ``-T`` option, to specify another toolset.
.. |VS_TOOLSET_HOST_ARCH_DEFAULT| replace::
By default this generator uses the 32-bit variant even on a 64-bit host.
.. include:: VS_TOOLSET_HOST_ARCH.txt
......@@ -46,4 +46,7 @@ The ``v142`` toolset that comes with Visual Studio 16 2019 is selected by
default. The :variable:`CMAKE_GENERATOR_TOOLSET` option may be set, perhaps
via the :manual:`cmake(1)` ``-T`` option, to specify another toolset.
.. |VS_TOOLSET_HOST_ARCH_DEFAULT| replace::
By default this generator uses the 32-bit variant even on a 64-bit host.
.. include:: VS_TOOLSET_HOST_ARCH.txt
......@@ -44,8 +44,8 @@ Supported pairs are:
and above with the CUDA toolkit VS integration installed.
See the :variable:`CMAKE_VS_PLATFORM_TOOLSET_CUDA` variable.
``host=x64``
Request use of the native ``x64`` toolchain on ``x64`` hosts.
``host=<arch>``
Specify the host tools architecture as ``x64`` or ``x86``.
Supported by VS 2013 and above.
See the :variable:`CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE`
variable.
......
......@@ -3,8 +3,8 @@ CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE
Visual Studio preferred tool architecture.
The :ref:`Visual Studio Generators` for VS 2013 and above support optional
selection of a 64-bit toolchain on 64-bit hosts by specifying a ``host=x64``
value in the :variable:`CMAKE_GENERATOR_TOOLSET` option. CMake provides
the selected toolchain architecture preference in this variable (either
``x64`` or empty).
The :ref:`Visual Studio Generators` for VS 2013 and above support using
either the 32-bit or 64-bit host toolchains by specifying a ``host=x86``
or ``host=x64`` value in the :variable:`CMAKE_GENERATOR_TOOLSET` option.
CMake provides the selected toolchain architecture preference in this
variable (``x86``, ``x64``, or empty).
......@@ -126,8 +126,8 @@ bool cmGlobalVisualStudio12Generator::MatchesGeneratorName(
bool cmGlobalVisualStudio12Generator::ProcessGeneratorToolsetField(
std::string const& key, std::string const& value)
{
if (key == "host" && value == "x64") {
this->GeneratorToolsetHostArchitecture = "x64";
if (key == "host" && (value == "x64" || value == "x86")) {
this->GeneratorToolsetHostArchitecture = value;
return true;
}
return this->cmGlobalVisualStudio11Generator::ProcessGeneratorToolsetField(
......
......@@ -5,6 +5,6 @@ CMake Error at CMakeLists.txt:[0-9]+ \(project\):
given toolset specification
Test Toolset,host=x64,host=x64
Test Toolset,host=x64,host=x86
that contains duplicate field key 'host'\.$
......@@ -16,14 +16,16 @@ if("${RunCMake_GENERATOR}" MATCHES "Visual Studio 1[012456]")
set(RunCMake_GENERATOR_TOOLSET "Test Toolset,host=x64")
run_cmake(TestToolsetHostArchBoth)
set(RunCMake_GENERATOR_TOOLSET ",host=x64")
run_cmake(TestToolsetHostArchOnly)
run_cmake(TestToolsetHostArchOnly_x64)
set(RunCMake_GENERATOR_TOOLSET "host=x64")
run_cmake(TestToolsetHostArchOnly)
run_cmake(TestToolsetHostArchOnly_x64)
set(RunCMake_GENERATOR_TOOLSET "host=x86")
run_cmake(TestToolsetHostArchOnly_x86)
set(RunCMake_GENERATOR_TOOLSET "Test Toolset")
run_cmake(TestToolsetHostArchNone)
set(RunCMake_GENERATOR_TOOLSET "Test Toolset,host=x65")
run_cmake(BadToolsetHostArch)
set(RunCMake_GENERATOR_TOOLSET "Test Toolset,host=x64,host=x64")
set(RunCMake_GENERATOR_TOOLSET "Test Toolset,host=x64,host=x86")
run_cmake(BadToolsetHostArchTwice)
if("${RunCMake_GENERATOR}" MATCHES "Visual Studio 1[56]")
set(RunCMake_GENERATOR_TOOLSET "Test Toolset,version=Test Toolset Version")
......
-- CMAKE_VS_PLATFORM_TOOLSET='v[0-9]+'
-- CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE='x86'
message(STATUS "CMAKE_VS_PLATFORM_TOOLSET='${CMAKE_VS_PLATFORM_TOOLSET}'")
message(STATUS "CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE='${CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE}'")
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