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Features: Add cxx_template_template_parameters. 

Extend the existing feature infrastructure as needed to support
both C++11 and C++98 features.
This commit is contained in:
Stephen Kelly 2014-04-06 11:40:11 +02:00
parent 8472ef243f
commit a36b957fc4
8 changed files with 56 additions and 0 deletions
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3
Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst
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@ -236,3 +236,6 @@ The features known to this version of CMake are:
Variadic templates, as defined in N2242_.
.. _N2242: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2242.pdf
``cxx_template_template_parameters``
Template template parameters, as defined in ``ISO/IEC 14882:1998``.

1
Modules/CMakeCXXCompiler.cmake.in
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@ -3,6 +3,7 @@ set(CMAKE_CXX_COMPILER_ARG1 "@CMAKE_CXX_COMPILER_ARG1@")
set(CMAKE_CXX_COMPILER_ID "@CMAKE_CXX_COMPILER_ID@")
set(CMAKE_CXX_COMPILER_VERSION "@CMAKE_CXX_COMPILER_VERSION@")
set(CMAKE_CXX_COMPILE_FEATURES "@CMAKE_CXX_COMPILE_FEATURES@")
set(CMAKE_CXX98_COMPILE_FEATURES "@CMAKE_CXX98_COMPILE_FEATURES@")
set(CMAKE_CXX11_COMPILE_FEATURES "@CMAKE_CXX11_COMPILE_FEATURES@")
set(CMAKE_CXX_PLATFORM_ID "@CMAKE_CXX_PLATFORM_ID@")

7
Modules/CMakeDetermineCompileFeatures.cmake
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@ -17,6 +17,7 @@ function(cmake_determine_compile_features lang)
if(lang STREQUAL CXX AND COMMAND cmake_record_cxx_compile_features)
message(STATUS "Detecting ${lang} compile features")
set(CMAKE_CXX98_COMPILE_FEATURES)
set(CMAKE_CXX11_COMPILE_FEATURES)
include("${CMAKE_ROOT}/Modules/Internal/FeatureTesting.cmake")
@ -28,13 +29,19 @@ function(cmake_determine_compile_features lang)
return()
endif()
if (CMAKE_CXX98_COMPILE_FEATURES)
list(REMOVE_ITEM CMAKE_CXX11_COMPILE_FEATURES ${CMAKE_CXX98_COMPILE_FEATURES})
endif()
if(NOT CMAKE_CXX_COMPILE_FEATURES)
set(CMAKE_CXX_COMPILE_FEATURES
${CMAKE_CXX98_COMPILE_FEATURES}
${CMAKE_CXX11_COMPILE_FEATURES}
)
endif()
set(CMAKE_CXX_COMPILE_FEATURES ${CMAKE_CXX_COMPILE_FEATURES} PARENT_SCOPE)
set(CMAKE_CXX98_COMPILE_FEATURES ${CMAKE_CXX98_COMPILE_FEATURES} PARENT_SCOPE)
set(CMAKE_CXX11_COMPILE_FEATURES ${CMAKE_CXX11_COMPILE_FEATURES} PARENT_SCOPE)
message(STATUS "Detecting ${lang} compile features - done")

1
Modules/Compiler/GNU-CXX-FeatureTests.cmake
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@ -74,4 +74,5 @@ set(_cmake_feature_test_cxx_extern_templates "${_oldestSupported} && __cplusplus
# TODO: Should be supported forever?
set(_cmake_feature_test_cxx_func_identifier "${_oldestSupported} && __cplusplus >= 201103L")
set(_cmake_feature_test_cxx_variadic_macros "${_oldestSupported} && __cplusplus >= 201103L")
set(_cmake_feature_test_cxx_template_template_parameters "${_oldestSupported} && __cplusplus >= 199711L")
set(_oldestSupported)

4
Modules/Compiler/GNU-CXX.cmake
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@ -27,10 +27,14 @@ endif()
macro(cmake_record_cxx_compile_features)
macro(_get_gcc_features std_version list)
record_compiler_features(CXX "-std=${std_version}" ${list})
if (NOT _result EQUAL 0)
return()
endif()
endmacro()
if (UNIX AND NOT APPLE AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
_get_gcc_features(c++11 CMAKE_CXX11_COMPILE_FEATURES)
_get_gcc_features(c++98 CMAKE_CXX98_COMPILE_FEATURES)
else()
set(_result 0)
endif()

21
Source/cmMakefile.cxx
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@ -79,6 +79,7 @@
F(cxx_sizeof_member) \
F(cxx_static_assert) \
F(cxx_strong_enums) \
F(cxx_template_template_parameters) \
F(cxx_thread_local) \
F(cxx_trailing_return_types) \
F(cxx_unicode_literals) \
@ -4626,8 +4627,16 @@ AddRequiredTargetFeature(cmTarget *target, const std::string& feature,
target->AppendProperty("COMPILE_FEATURES", feature.c_str());
bool needCxx98 = false;
bool needCxx11 = false;
if (const char *propCxx98 =
this->GetDefinition("CMAKE_CXX98_COMPILE_FEATURES"))
{
std::vector<std::string> props;
cmSystemTools::ExpandListArgument(propCxx98, props);
needCxx98 = std::find(props.begin(), props.end(), feature) != props.end();
}
if (const char *propCxx11 =
this->GetDefinition("CMAKE_CXX11_COMPILE_FEATURES"))
{
@ -4655,6 +4664,7 @@ AddRequiredTargetFeature(cmTarget *target, const std::string& feature,
cmStrCmp(existingCxxStandard))
: cmArrayEnd(CXX_STANDARDS);
bool setCxx98 = needCxx98 && !existingCxxStandard;
bool setCxx11 = needCxx11 && !existingCxxStandard;
if (needCxx11 && existingCxxStandard && existingCxxIt <
@ -4664,10 +4674,21 @@ AddRequiredTargetFeature(cmTarget *target, const std::string& feature,
{
setCxx11 = true;
}
else if(needCxx98 && existingCxxStandard && existingCxxIt <
std::find_if(cmArrayBegin(CXX_STANDARDS),
cmArrayEnd(CXX_STANDARDS),
cmStrCmp("98")))
{
setCxx98 = true;
}
if (setCxx11)
{
target->SetProperty("CXX_STANDARD", "11");
}
else if (setCxx98)
{
target->SetProperty("CXX_STANDARD", "98");
}
return true;
}

18
Tests/CompileFeatures/cxx_template_template_parameters.cpp Normal file
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@ -0,0 +1,18 @@
template<template <typename> class T, typename U>
void someFunc(T<U>)
{
}
template<typename T>
struct A
{
};
void otherFunc()
{
A<int> a;
someFunc(a);
}

1
Tests/SystemInformation/SystemInformation.in
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@ -26,6 +26,7 @@ CMAKE_CXX11_STANDARD_COMPILE_OPTION == "${CMAKE_CXX11_STANDARD_COMPILE_OPTION}"
CMAKE_CXX98_EXTENSION_COMPILE_OPTION == "${CMAKE_CXX98_EXTENSION_COMPILE_OPTION}"
CMAKE_CXX11_EXTENSION_COMPILE_OPTION == "${CMAKE_CXX11_EXTENSION_COMPILE_OPTION}"
CMAKE_CXX_COMPILE_FEATURES == "${CMAKE_CXX_COMPILE_FEATURES}"
CMAKE_CXX98_COMPILE_FEATURES == "${CMAKE_CXX98_COMPILE_FEATURES}"
CMAKE_CXX11_COMPILE_FEATURES == "${CMAKE_CXX11_COMPILE_FEATURES}"
// C shared library flag