Commit e0890d03 authored by Stephen Kelly's avatar Stephen Kelly

Features: Extend concept to C language.

Add properties and variables corresponding to CXX equivalents.

Add features for c_function_prototypes (C90), c_restrict (C99),
c_variadic_macros (C99) and c_static_assert (C11). This feature
set can be extended later.

Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader
to conditionally represent the c_restrict feature.
parent 775458de
......@@ -8,7 +8,8 @@ Add expected compiler features to a target.
target_compile_features(<target> <PRIVATE|PUBLIC|INTERFACE> <feature> [...])
Specify compiler features required when compiling a given target. If the
feature is not listed in the :variable:`CMAKE_CXX_COMPILE_FEATURES` variable,
feature is not listed in the :variable:`CMAKE_C_COMPILE_FEATURES` variable
or :variable:`CMAKE_CXX_COMPILE_FEATURES` variable,
then an error will be reported by CMake. If the use of the feature requires
an additional compiler flag, such as ``-std=c++11``, the flag will be added
automatically.
......
......@@ -16,6 +16,7 @@ Properties of Global Scope
/prop_gbl/ALLOW_DUPLICATE_CUSTOM_TARGETS
/prop_gbl/AUTOGEN_TARGETS_FOLDER
/prop_gbl/AUTOMOC_TARGETS_FOLDER
/prop_gbl/CMAKE_C_KNOWN_FEATURES
/prop_gbl/CMAKE_CXX_KNOWN_FEATURES
/prop_gbl/DEBUG_CONFIGURATIONS
/prop_gbl/DISABLED_FEATURES
......@@ -93,6 +94,9 @@ Properties on Targets
/prop_tgt/BUILD_WITH_INSTALL_RPATH
/prop_tgt/BUNDLE_EXTENSION
/prop_tgt/BUNDLE
/prop_tgt/C_EXTENSIONS
/prop_tgt/C_STANDARD
/prop_tgt/C_STANDARD_REQUIRED
/prop_tgt/COMPATIBLE_INTERFACE_BOOL
/prop_tgt/COMPATIBLE_INTERFACE_NUMBER_MAX
/prop_tgt/COMPATIBLE_INTERFACE_NUMBER_MIN
......
......@@ -260,6 +260,10 @@ Variables for Languages
:maxdepth: 1
/variable/CMAKE_COMPILER_IS_GNULANG
/variable/CMAKE_C_COMPILE_FEATURES
/variable/CMAKE_C_EXTENSIONS
/variable/CMAKE_C_STANDARD
/variable/CMAKE_C_STANDARD_REQUIRED
/variable/CMAKE_CXX_COMPILE_FEATURES
/variable/CMAKE_CXX_EXTENSIONS
/variable/CMAKE_CXX_STANDARD
......
CMAKE_C_KNOWN_FEATURES
----------------------
List of C features known to this version of CMake.
The features listed in this global property may be known to be available to the
C compiler. If the feature is available with the C compiler, it will
be listed in the :variable:`CMAKE_C_COMPILE_FEATURES` variable.
The features listed here may be used with the :command:`target_compile_features`
command.
The features known to this version of CMake are:
``c_function_prototypes``
Function prototypes, as defined in ``ISO/IEC 9899:1990``.
``c_restrict``
``restrict`` keyword, as defined in ``ISO/IEC 9899:1999``.
``c_static_assert``
Static assert, as defined in ``ISO/IEC 9899:2011``.
``c_variadic_macros``
Variadic macros, as defined in ``ISO/IEC 9899:1999``.
C_EXTENSIONS
------------
Boolean specifying whether compiler specific extensions are requested.
This property specifies whether compiler specific extensions should be
used. For some compilers, this results in adding a flag such
as ``-std=gnu11`` instead of ``-std=c11`` to the compile line.
C_STANDARD
----------
The C standard whose features are requested to build this target.
This property specifies the C standard whose features are requested
to build this target. For some compilers, this results in adding a
flag such as ``-std=c11`` to the compile line.
Supported values are ``90``, ``99`` and ``11``.
If the value requested does not result in a compile flag being added for
the compiler in use, a previous standard flag will be added instead. This
means that using:
.. code-block:: cmake
set_property(TARGET tgt PROPERTY C_STANDARD 11)
with a compiler which does not support ``-std=c11`` or an equivalent
flag will not result in an error or warning, but will instead add the
``-std=c99`` or ``-std=c90`` flag if supported. This "decay" behavior may
be controlled with the :prop_tgt:`C_STANDARD_REQUIRED` target property.
This property is initialized by the value of
the :variable:`CMAKE_C_STANDARD` variable if it is set when a target
is created.
C_STANDARD_REQUIRED
-------------------
Boolean describing whether the value of :prop_tgt:`C_STANDARD` is a requirement.
If this property is set to ``ON``, then the value of the
:prop_tgt:`C_STANDARD` target property is treated as a requirement. If this
property is ``OFF`` or unset, the :prop_tgt:`C_STANDARD` target property is
treated as optional and may "decay" to a previous standard if the requested is
not available.
This property is initialized by the value of
the :variable:`CMAKE_C_STANDARD_REQUIRED` variable if it is set when a
target is created.
......@@ -7,6 +7,12 @@ target-language-features
:variable:`CMAKE_CXX_STANDARD` and :variable:`CMAKE_CXX_EXTENSIONS`
variables may be set to initialize the target properties.
* New :prop_tgt:`C_STANDARD` and :prop_tgt:`C_EXTENSIONS` target
properties may specify values which CMake uses to compute required
compile options such as ``-std=c11`` or ``-std=gnu11``. The
:variable:`CMAKE_C_STANDARD` and :variable:`CMAKE_C_EXTENSIONS`
variables may be set to initialize the target properties.
* New :prop_tgt:`COMPILE_FEATURES` target property may contain a list
of features required to compile a target. CMake uses this
information to ensure that the compiler in use is capable of building
......
CMAKE_C_COMPILE_FEATURES
------------------------
List of features known to the C compiler
These features are known to be available for use with the C compiler. This
list is a subset of the features listed in the :prop_gbl:`CMAKE_C_KNOWN_FEATURES`
global property.
CMAKE_C_EXTENSIONS
------------------
Default value for ``C_EXTENSIONS`` property of targets.
This variable is used to initialize the :prop_tgt:`C_EXTENSIONS`
property on all targets. See that target property for additional
information.
CMAKE_C_STANDARD
----------------
Default value for ``C_STANDARD`` property of targets.
This variable is used to initialize the :prop_tgt:`C_STANDARD`
property on all targets. See that target property for additional
information.
CMAKE_C_STANDARD_REQUIRED
-------------------------
Default value for ``C_STANDARD_REQUIRED`` property of targets.
This variable is used to initialize the :prop_tgt:`C_STANDARD_REQUIRED`
property on all targets. See that target property for additional
information.
......@@ -2,6 +2,11 @@ set(CMAKE_C_COMPILER "@CMAKE_C_COMPILER@")
set(CMAKE_C_COMPILER_ARG1 "@CMAKE_C_COMPILER_ARG1@")
set(CMAKE_C_COMPILER_ID "@CMAKE_C_COMPILER_ID@")
set(CMAKE_C_COMPILER_VERSION "@CMAKE_C_COMPILER_VERSION@")
set(CMAKE_C_COMPILE_FEATURES "@CMAKE_C_COMPILE_FEATURES@")
set(CMAKE_C90_COMPILE_FEATURES "@CMAKE_C90_COMPILE_FEATURES@")
set(CMAKE_C99_COMPILE_FEATURES "@CMAKE_C99_COMPILE_FEATURES@")
set(CMAKE_C11_COMPILE_FEATURES "@CMAKE_C11_COMPILE_FEATURES@")
set(CMAKE_C_PLATFORM_ID "@CMAKE_C_PLATFORM_ID@")
set(CMAKE_C_SIMULATE_ID "@CMAKE_C_SIMULATE_ID@")
set(CMAKE_C_SIMULATE_VERSION "@CMAKE_C_SIMULATE_VERSION@")
......
......@@ -14,7 +14,45 @@
function(cmake_determine_compile_features lang)
if(lang STREQUAL CXX AND COMMAND cmake_record_cxx_compile_features)
if(lang STREQUAL C AND COMMAND cmake_record_c_compile_features)
message(STATUS "Detecting ${lang} compile features")
set(CMAKE_C90_COMPILE_FEATURES)
set(CMAKE_C99_COMPILE_FEATURES)
set(CMAKE_C11_COMPILE_FEATURES)
include("${CMAKE_ROOT}/Modules/Internal/FeatureTesting.cmake")
cmake_record_c_compile_features()
if(NOT _result EQUAL 0)
message(STATUS "Detecting ${lang} compile features - failed")
return()
endif()
if (CMAKE_C99_COMPILE_FEATURES AND CMAKE_C11_COMPILE_FEATURES)
list(REMOVE_ITEM CMAKE_C11_COMPILE_FEATURES ${CMAKE_C99_COMPILE_FEATURES})
endif()
if (CMAKE_C90_COMPILE_FEATURES AND CMAKE_C99_COMPILE_FEATURES)
list(REMOVE_ITEM CMAKE_C99_COMPILE_FEATURES ${CMAKE_C90_COMPILE_FEATURES})
endif()
if(NOT CMAKE_C_COMPILE_FEATURES)
set(CMAKE_C_COMPILE_FEATURES
${CMAKE_C90_COMPILE_FEATURES}
${CMAKE_C99_COMPILE_FEATURES}
${CMAKE_C11_COMPILE_FEATURES}
)
endif()
set(CMAKE_C_COMPILE_FEATURES ${CMAKE_C_COMPILE_FEATURES} PARENT_SCOPE)
set(CMAKE_C90_COMPILE_FEATURES ${CMAKE_C90_COMPILE_FEATURES} PARENT_SCOPE)
set(CMAKE_C99_COMPILE_FEATURES ${CMAKE_C99_COMPILE_FEATURES} PARENT_SCOPE)
set(CMAKE_C11_COMPILE_FEATURES ${CMAKE_C11_COMPILE_FEATURES} PARENT_SCOPE)
message(STATUS "Detecting ${lang} compile features - done")
elseif(lang STREQUAL CXX AND COMMAND cmake_record_cxx_compile_features)
message(STATUS "Detecting ${lang} compile features")
set(CMAKE_CXX98_COMPILE_FEATURES)
......
......@@ -73,6 +73,9 @@ else()
# Try to identify the ABI and configure it into CMakeCCompiler.cmake
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
CMAKE_DETERMINE_COMPILER_ABI(C ${CMAKE_ROOT}/Modules/CMakeCCompilerABI.c)
# Try to identify the compiler features
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake)
CMAKE_DETERMINE_COMPILE_FEATURES(C)
# Re-configure to save learned information.
configure_file(
......
set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 407")
set(GNU46_C11 "${_cmake_oldestSupported} && __STDC_VERSION__ >= 201112L")
set(_cmake_feature_test_c_static_assert "${GNU46_C11}")
# Since 4.4 at least:
set(GNU44_C99 "${_cmake_oldestSupported} && __STDC_VERSION__ >= 199901L")
set(_cmake_feature_test_c_restrict "${GNU44_C99}")
set(_cmake_feature_test_c_variadic_macros "${GNU44_C99}")
set(GNU_C90 "${_cmake_oldestSupported} && !defined(__STDC_VERSION__)")
set(_cmake_feature_test_c_function_prototypes "${GNU_C90}")
include(Compiler/GNU)
__compiler_gnu(C)
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
endif()
# This may change in a future GNU version.
set(CMAKE_C_STANDARD_DEFAULT 90)
macro(cmake_record_c_compile_features)
macro(_get_gcc_features std_version list)
record_compiler_features(C "-std=${std_version}" ${list})
endmacro()
if (UNIX AND NOT APPLE AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
_get_gcc_features(c90 CMAKE_C90_COMPILE_FEATURES)
if (_result EQUAL 0)
_get_gcc_features(c99 CMAKE_C99_COMPILE_FEATURES)
endif()
if (_result EQUAL 0)
_get_gcc_features(c11 CMAKE_C11_COMPILE_FEATURES)
endif()
else()
set(_result 0)
endif()
endmacro()
......@@ -43,7 +43,8 @@
# Possible compiler identifiers are documented with the
# :variable:`CMAKE_<LANG>_COMPILER_ID` variable.
# Available features in this version of CMake are listed in the
# :prop_gbl:`CMAKE_CXX_KNOWN_FEATURES` global property.
# :prop_gbl:`CMAKE_C_KNOWN_FEATURES` and
# :prop_gbl:`CMAKE_CXX_KNOWN_FEATURES` global properties.
#
# Feature Test Macros
# ===================
......@@ -102,6 +103,7 @@
# ========================== =================================== =================
# Feature Define Symbol
# ========================== =================================== =================
# ``c_restrict`` ``<PREFIX>_RESTRICT`` ``restrict``
# ``cxx_constexpr`` ``<PREFIX>_CONSTEXPR`` ``constexpr``
# ``cxx_deleted_functions`` ``<PREFIX>_DELETED_FUNCTION`` ``= delete``
# ``cxx_extern_templates`` ``<PREFIX>_EXTERN_TEMPLATE`` ``extern``
......@@ -221,6 +223,9 @@ function(write_compiler_detection_header
if (feature MATCHES "^cxx_")
list(APPEND _langs CXX)
list(APPEND CXX_features ${feature})
elseif (feature MATCHES "^c_")
list(APPEND _langs C)
list(APPEND C_features ${feature})
else()
message(FATAL_ERROR "Unsupported feature ${feature}.")
endif()
......@@ -239,6 +244,8 @@ function(write_compiler_detection_header
if(_lang STREQUAL CXX)
set(file_content "${file_content}\n#ifdef __cplusplus\n")
else()
set(file_content "${file_content}\n#ifndef __cplusplus\n")
endif()
compiler_id_detection(ID_CONTENT ${_lang} PREFIX ${prefix_arg}_
......@@ -279,6 +286,16 @@ function(write_compiler_detection_header
string(TOUPPER ${feature} feature_upper)
set(feature_PP "COMPILER_${feature_upper}")
set(def_name ${prefix_arg}_${feature_PP})
if (feature STREQUAL c_restrict)
set(def_value "${prefix_arg}_RESTRICT")
set(file_content "${file_content}
# if ${def_name}
# define ${def_value} restrict
# else
# define ${def_value}
# endif
\n")
endif()
if (feature STREQUAL cxx_constexpr)
set(def_value "${prefix_arg}_DECL_${feature_upper}")
set(file_content "${file_content}
......@@ -382,9 +399,8 @@ function(write_compiler_detection_header
\n")
endif()
endforeach()
if(_lang STREQUAL CXX)
set(file_content "${file_content}#endif\n")
endif()
set(file_content "${file_content}#endif\n")
endforeach()
......
......@@ -2201,6 +2201,10 @@ AddCompilerRequirementFlag(std::string &flags, cmTarget* target,
// Maintain sorted order, most recent first.
langStdMap["CXX"].push_back("11");
langStdMap["CXX"].push_back("98");
langStdMap["C"].push_back("11");
langStdMap["C"].push_back("99");
langStdMap["C"].push_back("90");
}
std::string standard(standardProp);
......
......@@ -4973,6 +4973,10 @@ void cmMakefile::RecordPolicies(cmPolicies::PolicyMap& pm)
}
#define FEATURE_STRING(F) , #F
static const char * const C_FEATURES[] = {
0
FOR_EACH_C_FEATURE(FEATURE_STRING)
};
static const char * const CXX_FEATURES[] = {
0
......@@ -4980,6 +4984,11 @@ static const char * const CXX_FEATURES[] = {
};
#undef FEATURE_STRING
static const char * const C_STANDARDS[] = {
"90"
, "99"
, "11"
};
static const char * const CXX_STANDARDS[] = {
"98"
, "11"
......@@ -4995,10 +5004,13 @@ AddRequiredTargetFeature(cmTarget *target, const std::string& feature,
target->AppendProperty("COMPILE_FEATURES", feature.c_str());
return true;
}
bool isCFeature = std::find_if(cmArrayBegin(C_FEATURES) + 1,
cmArrayEnd(C_FEATURES), cmStrCmp(feature))
!= cmArrayEnd(C_FEATURES);
bool isCxxFeature = std::find_if(cmArrayBegin(CXX_FEATURES) + 1,
cmArrayEnd(CXX_FEATURES), cmStrCmp(feature))
!= cmArrayEnd(CXX_FEATURES);
if (!isCxxFeature)
if (!isCFeature && !isCxxFeature)
{
cmOStringStream e;
if (error)
......@@ -5022,7 +5034,7 @@ AddRequiredTargetFeature(cmTarget *target, const std::string& feature,
return false;
}
std::string lang = "CXX";
std::string lang = isCFeature ? "C" : "CXX";
const char* featuresKnown =
this->GetDefinition("CMAKE_" + lang + "_COMPILE_FEATURES");
......@@ -5071,6 +5083,16 @@ AddRequiredTargetFeature(cmTarget *target, const std::string& feature,
target->AppendProperty("COMPILE_FEATURES", feature.c_str());
return isCFeature
? this->AddRequiredTargetCFeature(target, feature)
: this->AddRequiredTargetCxxFeature(target, feature);
}
//----------------------------------------------------------------------------
bool cmMakefile::
AddRequiredTargetCxxFeature(cmTarget *target,
const std::string& feature) const
{
bool needCxx98 = false;
bool needCxx11 = false;
......@@ -5136,3 +5158,93 @@ AddRequiredTargetFeature(cmTarget *target, const std::string& feature,
}
return true;
}
//----------------------------------------------------------------------------
bool cmMakefile::
AddRequiredTargetCFeature(cmTarget *target, const std::string& feature) const
{
bool needC90 = false;
bool needC99 = false;
bool needC11 = false;
if (const char *propC90 =
this->GetDefinition("CMAKE_C90_COMPILE_FEATURES"))
{
std::vector<std::string> props;
cmSystemTools::ExpandListArgument(propC90, props);
needC90 = std::find(props.begin(), props.end(), feature) != props.end();
}
if (const char *propC99 =
this->GetDefinition("CMAKE_C99_COMPILE_FEATURES"))
{
std::vector<std::string> props;
cmSystemTools::ExpandListArgument(propC99, props);
needC99 = std::find(props.begin(), props.end(), feature) != props.end();
}
if (const char *propC11 =
this->GetDefinition("CMAKE_C11_COMPILE_FEATURES"))
{
std::vector<std::string> props;
cmSystemTools::ExpandListArgument(propC11, props);
needC11 = std::find(props.begin(), props.end(), feature) != props.end();
}
const char *existingCStandard = target->GetProperty("C_STANDARD");
if (existingCStandard)
{
if (std::find_if(cmArrayBegin(C_STANDARDS), cmArrayEnd(C_STANDARDS),
cmStrCmp(existingCStandard)) == cmArrayEnd(C_STANDARDS))
{
cmOStringStream e;
e << "The C_STANDARD property on target \"" << target->GetName()
<< "\" contained an invalid value: \"" << existingCStandard << "\".";
this->IssueMessage(cmake::FATAL_ERROR, e.str().c_str());
return false;
}
}
const char * const *existingCIt = existingCStandard
? std::find_if(cmArrayBegin(C_STANDARDS),
cmArrayEnd(C_STANDARDS),
cmStrCmp(existingCStandard))
: cmArrayEnd(C_STANDARDS);
bool setC90 = needC90 && !existingCStandard;
bool setC99 = needC99 && !existingCStandard;
bool setC11 = needC11 && !existingCStandard;
if (needC11 && existingCStandard && existingCIt <
std::find_if(cmArrayBegin(C_STANDARDS),
cmArrayEnd(C_STANDARDS),
cmStrCmp("11")))
{
setC11 = true;
}
else if(needC99 && existingCStandard && existingCIt <
std::find_if(cmArrayBegin(C_STANDARDS),
cmArrayEnd(C_STANDARDS),
cmStrCmp("99")))
{
setC99 = true;
}
else if(needC90 && existingCStandard && existingCIt <
std::find_if(cmArrayBegin(C_STANDARDS),
cmArrayEnd(C_STANDARDS),
cmStrCmp("90")))
{
setC90 = true;
}
if (setC11)
{
target->SetProperty("C_STANDARD", "11");
}
else if (setC99)
{
target->SetProperty("C_STANDARD", "99");
}
else if (setC90)
{
target->SetProperty("C_STANDARD", "90");
}
return true;
}
......@@ -1098,6 +1098,12 @@ private:
std::vector<cmSourceFile*> QtUiFilesWithOptions;
unsigned int NumLastMatches;
bool AddRequiredTargetCFeature(cmTarget *target,
const std::string& feature) const;
bool AddRequiredTargetCxxFeature(cmTarget *target,
const std::string& feature) const;
};
//----------------------------------------------------------------------------
......
......@@ -314,6 +314,9 @@ void cmTarget::SetMakefile(cmMakefile* mf)
this->SetPropertyDefault("MACOSX_BUNDLE", 0);
this->SetPropertyDefault("MACOSX_RPATH", 0);
this->SetPropertyDefault("NO_SYSTEM_FROM_IMPORTED", 0);
this->SetPropertyDefault("C_STANDARD", 0);
this->SetPropertyDefault("C_STANDARD_REQUIRED", 0);
this->SetPropertyDefault("C_EXTENSIONS", 0);
this->SetPropertyDefault("CXX_STANDARD", 0);
this->SetPropertyDefault("CXX_STANDARD_REQUIRED", 0);
this->SetPropertyDefault("CXX_EXTENSIONS", 0);
......
......@@ -2273,12 +2273,16 @@ const char *cmake::GetProperty(const std::string& prop,
}
this->SetProperty("ENABLED_LANGUAGES", lang.c_str());
}
#define STRING_LIST_ELEMENT(F) ";" #F
if (prop == "CMAKE_C_KNOWN_FEATURES")
{
return FOR_EACH_C_FEATURE(STRING_LIST_ELEMENT) + 1;
}
if (prop == "CMAKE_CXX_KNOWN_FEATURES")
{
#define STRING_LIST_ELEMENT(F) ";" #F
return FOR_EACH_CXX_FEATURE(STRING_LIST_ELEMENT) + 1;
#undef STRING_LIST_ELEMENT
}
#undef STRING_LIST_ELEMENT
return this->Properties.GetPropertyValue(prop, scope, chain);
}
......
......@@ -458,6 +458,12 @@ private:
{"-Wno-dev", "Suppress developer warnings."},\
{"-Wdev", "Enable developer warnings."}
#define FOR_EACH_C_FEATURE(F) \
F(c_function_prototypes) \
F(c_restrict) \
F(c_static_assert) \
F(c_variadic_macros)
#define FOR_EACH_CXX_FEATURE(F) \
F(cxx_alias_templates) \
F(cxx_alignas) \
......
cmake_minimum_required(VERSION 3.0)
project(target_compile_features)
if (NOT CMAKE_CXX_COMPILE_FEATURES)
if (NOT CMAKE_CXX_COMPILE_FEATURES AND NOT CMAKE_C_COMPILE_FEATURES)
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/test_dummy.cpp"
"int main(int,char**) { return 0; }\n"
)
......@@ -11,15 +11,35 @@ endif()
set(CMAKE_VERBOSE_MAKEFILE ON)
add_executable(target_compile_features main.cpp)
target_compile_features(target_compile_features
PRIVATE cxx_auto_type
)
if (CMAKE_C_COMPILE_FEATURES)
add_executable(target_compile_features main.c)
target_compile_features(target_compile_features
PRIVATE c_restrict
)
add_library(lib_auto_type lib_auto_type.cpp)
target_compile_features(lib_auto_type
PUBLIC cxx_auto_type
)
add_library(lib_restrict lib_restrict.c)
target_compile_features(lib_restrict
PUBLIC c_restrict
)
add_executable(lib_user lib_user.cpp)
target_link_libraries(lib_user lib_auto_type)
add_executable(restrict_user restrict_user.c)
target_link_libraries(restrict_user lib_restrict)
endif()
if (CMAKE_CXX_COMPILE_FEATURES)
if (CMAKE_C_COMPILE_FEATURES)
set(target_suffix _cxx)
endif()
add_executable(target_compile_features${target_suffix} main.cpp)
target_compile_features(target_compile_features${target_suffix}
PRIVATE cxx_auto_type
)
add_library(lib_auto_type lib_auto_type.cpp)
target_compile_features(lib_auto_type
PUBLIC cxx_auto_type
)
add_executable(lib_user lib_user.cpp)
target_link_libraries(lib_user lib_auto_type)
endif()
#include "lib_restrict.h"
int foo(int * restrict a, int * restrict b)
{
(void)a;
(void)b;
return 0;
}
#ifndef LIB_RESTRICT_H
#define LIB_RESTRICT_H
int foo(int * restrict a, int * restrict b);
#endif
int foo(int * restrict a, int * restrict b)
{
(void)a;
(void)b;
return 0;
}
int main()
{
return 0;
}
#include "lib_restrict.h"
int bar(int * restrict a, int * restrict b)
{
(void)a;
(void)b;
return foo(a, b);
}
int main()
{
return 0;
}
......@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.0)
project(CompileFeatures)
if (NOT CMAKE_CXX_COMPILE_FEATURES)
if (NOT CMAKE_C_COMPILE_FEATURES AND NOT CMAKE_CXX_COMPILE_FEATURES)
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp"
"int main(int,char**) { return 0; }\n"
)
......@@ -22,6 +22,10 @@ macro(run_test feature lang)
endif()
endmacro()
get_property(c_features GLOBAL PROPERTY CMAKE_C_KNOWN_FEATURES)
foreach(feature ${c_features})
run_test(${feature} C)
endforeach()
get_property(cxx_features GLOBAL PROPERTY CMAKE_CXX_KNOWN_FEATURES)
foreach(feature ${cxx_features})
run_test(${feature} CXX)
......@@ -34,9 +38,11 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL GNU
)
endif()
set(C_ext c)
set(C_standard_flag 11)
set(CXX_ext cpp)
set(CXX_standard_flag 11)
foreach(lang CXX)
foreach(lang CXX C)
if (CMAKE_${lang}_COMPILE_FEATURES)
foreach(feature ${${lang}_non_features})
message("Testing feature : ${feature}")
......