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CMake/Tests/Module/WriteCompilerDetectionHeader/CMakeLists.txt

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Features: Quote all compiler names when comparing with COMPILER_ID In preparation of adding MSVC support we need to quote all compiler names, as MSVC is also a CMake variable.
2015-01-06 21:31:30 +03:00
cmake_minimum_required(VERSION 3.1.0)
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
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project(WriteCompilerDetectionHeader)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
include(WriteCompilerDetectionHeader)
get_property(cxx_known_features GLOBAL PROPERTY CMAKE_CXX_KNOWN_FEATURES)
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.
2013-11-04 04:15:43 +04:00
get_property(c_known_features GLOBAL PROPERTY CMAKE_C_KNOWN_FEATURES)
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
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write_compiler_detection_header(
FILE "${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h"
PREFIX TEST
Features: Record for MSVC 2010-2015 Also, in WCDH add MSVC Compatibility for cxx_align{of,as}. Co-Author: Stephen Kelly <steveire@gmail.com> Co-Author: Brad King <brad.king@kitware.com>
2015-01-19 23:49:06 +03:00
COMPILERS GNU Clang AppleClang MSVC SunPro
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
2013-10-21 18:59:40 +04:00
VERSION 3.1
PROLOG "// something"
EPILOG "// more"
FEATURES
Features: Extend concept to C language. Add properties and variables corresponding to CXX equivalents. Add features for c_function_prototypes (C90), c_restrict (C99), c_variadic_macros (C99) and c_static_assert (C11). This feature set can be extended later. Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader to conditionally represent the c_restrict feature.
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${cxx_known_features} ${c_known_features}
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
2013-10-21 18:59:40 +04:00
)
Features: Extend concept to C language. Add properties and variables corresponding to CXX equivalents. Add features for c_function_prototypes (C90), c_restrict (C99), c_variadic_macros (C99) and c_static_assert (C11). This feature set can be extended later. Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader to conditionally represent the c_restrict feature.
2013-11-04 04:15:43 +04:00
if (NOT CMAKE_CXX_COMPILE_FEATURES AND NOT CMAKE_C_COMPILE_FEATURES)
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
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file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp"
"int main(int,char**) { return 0; }\n"
)
add_executable(WriteCompilerDetectionHeader "${CMAKE_CURRENT_BINARY_DIR}/dummy.cpp")
Features: Wrap failure-test in UNIX condition. The use of GNU on non-UNIX for 'compile features' is not tested and is not well defined.
2015-01-18 16:59:40 +03:00
if(UNIX OR NOT CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
include(CheckCXXSourceCompiles)
check_cxx_source_compiles("#include \"${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h\"\nint main() { return 0; }\n"
file_include_works
)
if (file_include_works)
message(SEND_ERROR "Inclusion of ${CMAKE_CURRENT_BINARY_DIR}/test_compiler_detection.h was expected to cause an error, but did not.")
endif()
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
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endif()
return()
endif()
Features: Add compiler version support to WriteCompilerDetectionHeader.
2014-06-05 15:16:56 +04:00
string(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.[0-9]+.*" "\\1" COMPILER_VERSION_MAJOR "${CMAKE_CXX_COMPILER_VERSION}")
string(REGEX REPLACE "^[0-9]+\\.([0-9]+)\\.[0-9]+.*" "\\1" COMPILER_VERSION_MINOR "${CMAKE_CXX_COMPILER_VERSION}")
string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" COMPILER_VERSION_PATCH "${CMAKE_CXX_COMPILER_VERSION}")
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
2013-10-21 18:59:40 +04:00
macro(set_defines target true_defs false_defs)
set(defines)
foreach(def ${true_defs})
list(APPEND defines ${def}=1)
endforeach()
foreach(def ${false_defs})
list(APPEND defines ${def}=0)
endforeach()
target_compile_definitions(${target}
PRIVATE
${defines}
Features: Add compiler version support to WriteCompilerDetectionHeader.
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EXPECTED_COMPILER_VERSION_MAJOR=${COMPILER_VERSION_MAJOR}
EXPECTED_COMPILER_VERSION_MINOR=${COMPILER_VERSION_MINOR}
EXPECTED_COMPILER_VERSION_PATCH=${COMPILER_VERSION_PATCH}
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
2013-10-21 18:59:40 +04:00
)
endmacro()
Features: Quote all compiler names when comparing with COMPILER_ID In preparation of adding MSVC support we need to quote all compiler names, as MSVC is also a CMake variable.
2015-01-06 21:31:30 +03:00
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
Features: Record for SolarisStudio 12.4. It has similar C++11 capabilities compared to GCC 4.8.
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OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang"
OR CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
2013-10-21 18:59:40 +04:00
# False for C++98 mode.
list(APPEND false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
list(APPEND false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
endif()
Features: Record for MSVC 2010-2015 Also, in WCDH add MSVC Compatibility for cxx_align{of,as}. Co-Author: Stephen Kelly <steveire@gmail.com> Co-Author: Brad King <brad.king@kitware.com>
2015-01-19 23:49:06 +03:00
# for msvc the compiler version determines which c++11 features are available.
if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
if(";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_delegating_constructors;")
list(APPEND true_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
list(APPEND true_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
else()
list(APPEND false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
list(APPEND false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
endif()
endif()
Features: Quote all compiler names when comparing with COMPILER_ID In preparation of adding MSVC support we need to quote all compiler names, as MSVC is also a CMake variable.
2015-01-06 21:31:30 +03:00
if (CMAKE_C_COMPILER_ID STREQUAL "GNU"
OR CMAKE_C_COMPILER_ID STREQUAL "Clang"
OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
WCDH: Make the header -Wundef safe for the C language. The __STDC_VERSION__ macro may be defined or not depending on the implementation dialect of C. Test that it is defined before testing its value. The CXX tests do not need such a change because they define __cplusplus in all dialects.
2014-11-24 23:47:48 +03:00
add_executable(C_undefined c_undefined.c)
WCDH: Fix the C_STANDARD property in the tests. The CXX_STANDARD property validates the values allowed for it, and '90' is not a valid value for it. However, the validation is only done for languages enabled for the target, and as C_undefined has no CXX files, that language is not enabled for it. This amends commit v3.1.0-rc3~23^2 (WCDH: Make the header -Wundef safe for the C language., 2014-11-24).
2015-01-19 21:43:04 +03:00
set_property(TARGET C_undefined PROPERTY C_STANDARD 90)
WCDH: Make the header -Wundef safe for the C language. The __STDC_VERSION__ macro may be defined or not depending on the implementation dialect of C. Test that it is defined before testing its value. The CXX tests do not need such a change because they define __cplusplus in all dialects.
2014-11-24 23:47:48 +03:00
target_compile_options(C_undefined PRIVATE -Werror=undef)
Features: Fix C90 feature detection. This bug caused c_function_prototypes to not be recorded at configure time when compiling with -std=gnu99 or similar. In the case of feature recording, that was not a problem, because the logic in CMakeDetermineCompileFeatures.cmake currently assumes that a feature present for an earlier standard is present for a later standard. However, the detection strings are also used in WriteCompilerDetectionHeader, so the feature macro has been defined to '0' when using a later language dialect. Fix that by not checking the existence of the __STDC_VERSION__ macro at all when detecting C90 features.
2015-02-03 23:47:45 +03:00
add_executable(WriteCompilerDetectionHeader_C main.c)
set_property(TARGET WriteCompilerDetectionHeader_C PROPERTY C_STANDARD 90)
set_defines(WriteCompilerDetectionHeader_C "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES" "EXPECTED_COMPILER_C_RESTRICT")
add_executable(WriteCompilerDetectionHeader_C_multi main_multi.c)
set_property(TARGET WriteCompilerDetectionHeader_C_multi PROPERTY C_STANDARD 90)
set_defines(WriteCompilerDetectionHeader_C_multi "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES" "EXPECTED_COMPILER_C_RESTRICT")
target_include_directories(WriteCompilerDetectionHeader_C_multi PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
WCDH: Make the header -Wundef safe for the C language. The __STDC_VERSION__ macro may be defined or not depending on the implementation dialect of C. Test that it is defined before testing its value. The CXX tests do not need such a change because they define __cplusplus in all dialects.
2014-11-24 23:47:48 +03:00
endif()
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
2013-10-21 18:59:40 +04:00
add_executable(WriteCompilerDetectionHeader main.cpp)
set_property(TARGET WriteCompilerDetectionHeader PROPERTY CXX_STANDARD 98)
set_defines(WriteCompilerDetectionHeader "${true_defs}" "${false_defs}")
WCDH: Make it possible to generate multiple files. Extend the write_compiler_detection_header interface to allow specifying a location for supplementary files, and getting the list of resulting files as a variable.
2014-10-31 02:41:53 +03:00
write_compiler_detection_header(
FILE "${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files/multi_file_compiler_detection.h"
PREFIX MULTI
OUTPUT_FILES_VAR multi_files
OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files/compiler_support"
Features: Record for MSVC 2010-2015 Also, in WCDH add MSVC Compatibility for cxx_align{of,as}. Co-Author: Stephen Kelly <steveire@gmail.com> Co-Author: Brad King <brad.king@kitware.com>
2015-01-19 23:49:06 +03:00
COMPILERS GNU Clang AppleClang MSVC SunPro
WCDH: Make it possible to generate multiple files. Extend the write_compiler_detection_header interface to allow specifying a location for supplementary files, and getting the list of resulting files as a variable.
2014-10-31 02:41:53 +03:00
VERSION 3.1
FEATURES
${cxx_known_features} ${c_known_features}
)
add_executable(multi_files multi_files.cpp)
set_property(TARGET multi_files PROPERTY CXX_STANDARD 98)
target_include_directories(multi_files PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
set_defines(multi_files "${true_defs}" "${false_defs}")
Add the WriteCompilerDetectionHeader module. Provide a function to write a portable header to detect compiler features. Generate a preprocessor #error for unknown compilers and compiler versions whose features are not yet recorded. This error condition might be relaxed in the future, but for now it is useful for verification of expectations.
2013-10-21 18:59:40 +04:00
if(MSVC)
return() # MSVC has only one mode.
endif()
# Since GNU 4.7
if (";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_delegating_constructors;")
list(APPEND true_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
list(REMOVE_ITEM false_defs EXPECTED_COMPILER_CXX_DELEGATING_CONSTRUCTORS)
endif()
# Since GNU 4.4
if (";${CMAKE_CXX_COMPILE_FEATURES};" MATCHES ";cxx_variadic_templates;")
list(APPEND true_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
list(REMOVE_ITEM false_defs EXPECTED_COMPILER_CXX_VARIADIC_TEMPLATES)
endif()
add_executable(WriteCompilerDetectionHeader_11 main.cpp)
set_property(TARGET WriteCompilerDetectionHeader_11 PROPERTY CXX_STANDARD 11)
set_defines(WriteCompilerDetectionHeader_11 "${true_defs}" "${false_defs}")
WCDH: Make it possible to generate multiple files. Extend the write_compiler_detection_header interface to allow specifying a location for supplementary files, and getting the list of resulting files as a variable.
2014-10-31 02:41:53 +03:00
add_executable(multi_files_11 multi_files.cpp)
set_property(TARGET multi_files_11 PROPERTY CXX_STANDARD 11)
target_include_directories(multi_files_11 PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
set_defines(multi_files_11 "${true_defs}" "${false_defs}")
Features: Fix C90 feature detection. This bug caused c_function_prototypes to not be recorded at configure time when compiling with -std=gnu99 or similar. In the case of feature recording, that was not a problem, because the logic in CMakeDetermineCompileFeatures.cmake currently assumes that a feature present for an earlier standard is present for a later standard. However, the detection strings are also used in WriteCompilerDetectionHeader, so the feature macro has been defined to '0' when using a later language dialect. Fix that by not checking the existence of the __STDC_VERSION__ macro at all when detecting C90 features.
2015-02-03 23:47:45 +03:00
if (CMAKE_C_COMPILER_ID STREQUAL "GNU"
OR CMAKE_C_COMPILER_ID STREQUAL "Clang"
OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
add_executable(WriteCompilerDetectionHeader_C11 main.c)
set_property(TARGET WriteCompilerDetectionHeader_C11 PROPERTY C_STANDARD 11)
set_defines(WriteCompilerDetectionHeader_C11 "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES;EXPECTED_COMPILER_C_RESTRICT" "")
add_executable(WriteCompilerDetectionHeader_C11_multi main_multi.c)
set_property(TARGET WriteCompilerDetectionHeader_C11_multi PROPERTY C_STANDARD 11)
set_defines(WriteCompilerDetectionHeader_C11_multi "EXPECTED_COMPILER_C_FUNCTION_PROTOTYPES;EXPECTED_COMPILER_C_RESTRICT" "")
target_include_directories(WriteCompilerDetectionHeader_C11_multi PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/compiler_multi_files)
endif()