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# CMake support macros and functions for the libical project
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
# Call option() and then add_feature_info()
function(libical_option option description)
set(extra_option_arguments ${ARGN})
option(${option} "${description}" ${extra_option_arguments})
add_feature_info("Option ${option}" ${option} "${description}")
endfunction()
# Warn about deprecated cmake options then call libical_option
function(libical_deprecated_option deprecated_option option description)
set(extra_option_arguments ${ARGN})
if(${deprecated_option})
message(WARNING "${deprecated_option} is deprecated. Use ${option} instead")
set(${option} ${deprecated_option} CACHE BOOL "${description}")
endif()
libical_option(${option} "${description}" ${extra_option_arguments})
endfunction()
# If condition is True, append the specified value to each ARGN
function(libical_append_if condition value)
if(${condition})
foreach(variable ${ARGN})
set(${variable} "${${variable}} ${value}" PARENT_SCOPE)
endforeach()
endif()
endfunction()
# Create a variable C_SUPPORTS_<flag> with a boolean denoting
# if the C compiler supports that flag; if so, append the flag
# to the global CMAKE_C_FLAGS variable.
macro(libical_add_cflag flag name)
check_c_compiler_flag("${flag}" "C_SUPPORTS_${name}")
libical_append_if("C_SUPPORTS_${name}" "${flag}" CMAKE_C_FLAGS)
endmacro()
# Create a variable CXX_SUPPORTS_<flag> with a boolean denoting
# if the C++ compiler supports that flag; if so, append the flag
# to the global CMAKE_CXX_FLAGS variable.
macro(libical_add_cxxflag flag name)
check_cxx_compiler_flag("${flag}" "CXX_SUPPORTS_${name}")
libical_append_if("CXX_SUPPORTS_${name}" "${flag}" CMAKE_CXX_FLAGS)
endmacro()
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