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-rw-r--r--cmake/Modules/HandleLibcxxabiFlags.cmake208
1 files changed, 208 insertions, 0 deletions
diff --git a/cmake/Modules/HandleLibcxxabiFlags.cmake b/cmake/Modules/HandleLibcxxabiFlags.cmake
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+# HandleLibcxxFlags - A set of macros used to setup the flags used to compile
+# and link libc++abi. These macros add flags to the following CMake variables.
+# - LIBCXXABI_COMPILE_FLAGS: flags used to compile libc++abi
+# - LIBCXXABI_LINK_FLAGS: flags used to link libc++abi
+# - LIBCXXABI_LIBRARIES: libraries to link libc++abi to.
+
+include(CheckCXXCompilerFlag)
+
+unset(add_flag_if_supported)
+
+# Mangle the name of a compiler flag into a valid CMake identifier.
+# Ex: --std=c++11 -> STD_EQ_CXX11
+macro(mangle_name str output)
+ string(STRIP "${str}" strippedStr)
+ string(REGEX REPLACE "^/" "" strippedStr "${strippedStr}")
+ string(REGEX REPLACE "^-+" "" strippedStr "${strippedStr}")
+ string(REGEX REPLACE "-+$" "" strippedStr "${strippedStr}")
+ string(REPLACE "-" "_" strippedStr "${strippedStr}")
+ string(REPLACE "=" "_EQ_" strippedStr "${strippedStr}")
+ string(REPLACE "+" "X" strippedStr "${strippedStr}")
+ string(TOUPPER "${strippedStr}" ${output})
+endmacro()
+
+# Remove a list of flags from all CMake variables that affect compile flags.
+# This can be used to remove unwanted flags specified on the command line
+# or added in other parts of LLVM's cmake configuration.
+macro(remove_flags)
+ foreach(var ${ARGN})
+ string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
+ string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
+ string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+ string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
+ string(REPLACE "${var}" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+ string(REPLACE "${var}" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
+ string(REPLACE "${var}" "" CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
+ string(REPLACE "${var}" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
+ string(REPLACE "${var}" "" CMAKE_SHARED_MODULE_FLAGS "${CMAKE_SHARED_MODULE_FLAGS}")
+ remove_definitions(${var})
+ endforeach()
+endmacro(remove_flags)
+
+macro(check_flag_supported flag)
+ mangle_name("${flag}" flagname)
+ check_cxx_compiler_flag("${flag}" "LIBCXXABI_SUPPORTS_${flagname}_FLAG")
+endmacro()
+
+# Add a macro definition if condition is true.
+macro(define_if condition def)
+ if (${condition})
+ add_definitions(${def})
+ endif()
+endmacro()
+
+# Add a macro definition if condition is not true.
+macro(define_if_not condition def)
+ if (NOT ${condition})
+ add_definitions(${def})
+ endif()
+endmacro()
+
+# Add a macro definition to the __config_site file if the specified condition
+# is 'true'. Note that '-D${def}' is not added. Instead it is expected that
+# the build include the '__config_site' header.
+macro(config_define_if condition def)
+ if (${condition})
+ set(${def} ON)
+ set(LIBCXXABI_NEEDS_SITE_CONFIG ON)
+ endif()
+endmacro()
+
+macro(config_define_if_not condition def)
+ if (NOT ${condition})
+ set(${def} ON)
+ set(LIBCXXABI_NEEDS_SITE_CONFIG ON)
+ endif()
+endmacro()
+
+macro(config_define value def)
+ set(${def} ${value})
+ set(LIBCXXABI_NEEDS_SITE_CONFIG ON)
+endmacro()
+
+# Add a list of flags to all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS',
+# 'LIBCXXABI_COMPILE_FLAGS' and 'LIBCXXABI_LINK_FLAGS'.
+macro(add_target_flags)
+ foreach(value ${ARGN})
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${value}")
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${value}")
+ list(APPEND LIBCXXABI_COMPILE_FLAGS ${value})
+ list(APPEND LIBCXXABI_LINK_FLAGS ${value})
+ endforeach()
+endmacro()
+
+# If the specified 'condition' is true then add a list of flags to
+# all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS', 'LIBCXXABI_COMPILE_FLAGS'
+# and 'LIBCXXABI_LINK_FLAGS'.
+macro(add_target_flags_if condition)
+ if (${condition})
+ add_target_flags(${ARGN})
+ endif()
+endmacro()
+
+# Add a specified list of flags to both 'LIBCXXABI_COMPILE_FLAGS' and
+# 'LIBCXXABI_LINK_FLAGS'.
+macro(add_flags)
+ foreach(value ${ARGN})
+ list(APPEND LIBCXXABI_COMPILE_FLAGS ${value})
+ list(APPEND LIBCXXABI_LINK_FLAGS ${value})
+ endforeach()
+endmacro()
+
+# If the specified 'condition' is true then add a list of flags to both
+# 'LIBCXXABI_COMPILE_FLAGS' and 'LIBCXXABI_LINK_FLAGS'.
+macro(add_flags_if condition)
+ if (${condition})
+ add_flags(${ARGN})
+ endif()
+endmacro()
+
+# Add each flag in the list to LIBCXXABI_COMPILE_FLAGS and LIBCXXABI_LINK_FLAGS
+# if that flag is supported by the current compiler.
+macro(add_flags_if_supported)
+ foreach(flag ${ARGN})
+ mangle_name("${flag}" flagname)
+ check_cxx_compiler_flag("${flag}" "LIBCXXABI_SUPPORTS_${flagname}_FLAG")
+ add_flags_if(LIBCXXABI_SUPPORTS_${flagname}_FLAG ${flag})
+ endforeach()
+endmacro()
+
+# Add a list of flags to 'LIBCXXABI_COMPILE_FLAGS'.
+macro(add_compile_flags)
+ foreach(f ${ARGN})
+ list(APPEND LIBCXXABI_COMPILE_FLAGS ${f})
+ endforeach()
+endmacro()
+
+# If 'condition' is true then add the specified list of flags to
+# 'LIBCXXABI_COMPILE_FLAGS'
+macro(add_compile_flags_if condition)
+ if (${condition})
+ add_compile_flags(${ARGN})
+ endif()
+endmacro()
+
+# For each specified flag, add that flag to 'LIBCXXABI_COMPILE_FLAGS' if the
+# flag is supported by the C++ compiler.
+macro(add_compile_flags_if_supported)
+ foreach(flag ${ARGN})
+ mangle_name("${flag}" flagname)
+ check_cxx_compiler_flag("${flag}" "LIBCXXABI_SUPPORTS_${flagname}_FLAG")
+ add_compile_flags_if(LIBCXXABI_SUPPORTS_${flagname}_FLAG ${flag})
+ endforeach()
+endmacro()
+
+# For each specified flag, add that flag to 'LIBCXXABI_COMPILE_FLAGS' if the
+# flag is supported by the C compiler.
+macro(add_c_compile_flags_if_supported)
+ foreach(flag ${ARGN})
+ mangle_name("${flag}" flagname)
+ check_c_compiler_flag("${flag}" "LIBCXXABI_SUPPORTS_${flagname}_FLAG")
+ add_compile_flags_if(LIBCXXABI_SUPPORTS_${flagname}_FLAG ${flag})
+ endforeach()
+endmacro()
+
+# Add a list of flags to 'LIBCXXABI_LINK_FLAGS'.
+macro(add_link_flags)
+ foreach(f ${ARGN})
+ list(APPEND LIBCXXABI_LINK_FLAGS ${f})
+ endforeach()
+endmacro()
+
+# If 'condition' is true then add the specified list of flags to
+# 'LIBCXXABI_LINK_FLAGS'
+macro(add_link_flags_if condition)
+ if (${condition})
+ add_link_flags(${ARGN})
+ endif()
+endmacro()
+
+# For each specified flag, add that flag to 'LIBCXXABI_LINK_FLAGS' if the
+# flag is supported by the C++ compiler.
+macro(add_link_flags_if_supported)
+ foreach(flag ${ARGN})
+ mangle_name("${flag}" flagname)
+ check_cxx_compiler_flag("${flag}" "LIBCXXABI_SUPPORTS_${flagname}_FLAG")
+ add_link_flags_if(LIBCXXABI_SUPPORTS_${flagname}_FLAG ${flag})
+ endforeach()
+endmacro()
+
+# Add a list of libraries or link flags to 'LIBCXXABI_LIBRARIES'.
+macro(add_library_flags)
+ foreach(lib ${ARGN})
+ list(APPEND LIBCXXABI_LIBRARIES ${lib})
+ endforeach()
+endmacro()
+
+# if 'condition' is true then add the specified list of libraries and flags
+# to 'LIBCXXABI_LIBRARIES'.
+macro(add_library_flags_if condition)
+ if(${condition})
+ add_library_flags(${ARGN})
+ endif()
+endmacro()
+
+# Turn a comma separated CMake list into a space separated string.
+macro(split_list listname)
+ string(REPLACE ";" " " ${listname} "${${listname}}")
+endmacro()