diff options
Diffstat (limited to 'cmake/module')
| -rw-r--r-- | cmake/module/ProcessConfigurations.cmake | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/cmake/module/ProcessConfigurations.cmake b/cmake/module/ProcessConfigurations.cmake new file mode 100644 index 0000000000..80e842f59c --- /dev/null +++ b/cmake/module/ProcessConfigurations.cmake @@ -0,0 +1,164 @@ +# Copyright (c) 2023-present The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or https://opensource.org/license/mit/. + +include_guard(GLOBAL) + +include(TryAppendCXXFlags) + +macro(normalize_string string) + string(REGEX REPLACE " +" " " ${string} "${${string}}") + string(STRIP "${${string}}" ${string}) +endmacro() + +function(are_flags_overridden flags_var result_var) + normalize_string(${flags_var}) + normalize_string(${flags_var}_INIT) + if(${flags_var} STREQUAL ${flags_var}_INIT) + set(${result_var} FALSE PARENT_SCOPE) + else() + set(${result_var} TRUE PARENT_SCOPE) + endif() +endfunction() + + +# Removes duplicated flags. The relative order of flags is preserved. +# If duplicates are encountered, only the last instance is preserved. +function(deduplicate_flags flags) + separate_arguments(${flags}) + list(REVERSE ${flags}) + list(REMOVE_DUPLICATES ${flags}) + list(REVERSE ${flags}) + list(JOIN ${flags} " " result) + set(${flags} "${result}" PARENT_SCOPE) +endfunction() + + +function(get_all_configs output) + get_property(is_multi_config GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG) + if(is_multi_config) + set(all_configs ${CMAKE_CONFIGURATION_TYPES}) + else() + get_property(all_configs CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS) + if(NOT all_configs) + # See https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html#default-and-custom-configurations + set(all_configs Debug Release RelWithDebInfo MinSizeRel) + endif() + endif() + set(${output} "${all_configs}" PARENT_SCOPE) +endfunction() + + +#[=[ +Set the default build configuration. + +See: https://cmake.org/cmake/help/latest/manual/cmake-buildsystem.7.html#build-configurations. + +On single-configuration generators, this function sets the CMAKE_BUILD_TYPE variable to +the default build configuration, which can be overridden by the user at configure time if needed. + +On multi-configuration generators, this function rearranges the CMAKE_CONFIGURATION_TYPES list, +ensuring that the default build configuration appears first while maintaining the order of the +remaining configurations. The user can choose a build configuration at build time. +]=] +function(set_default_config config) + get_all_configs(all_configs) + if(NOT ${config} IN_LIST all_configs) + message(FATAL_ERROR "The default config is \"${config}\", but must be one of ${all_configs}.") + endif() + + list(REMOVE_ITEM all_configs ${config}) + list(PREPEND all_configs ${config}) + + get_property(is_multi_config GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG) + if(is_multi_config) + get_property(help_string CACHE CMAKE_CONFIGURATION_TYPES PROPERTY HELPSTRING) + set(CMAKE_CONFIGURATION_TYPES "${all_configs}" CACHE STRING "${help_string}" FORCE) + # Also see https://gitlab.kitware.com/cmake/cmake/-/issues/19512. + set(CMAKE_TRY_COMPILE_CONFIGURATION "${config}" PARENT_SCOPE) + else() + set_property(CACHE CMAKE_BUILD_TYPE PROPERTY + STRINGS "${all_configs}" + ) + if(NOT CMAKE_BUILD_TYPE) + message(STATUS "Setting build type to \"${config}\" as none was specified") + get_property(help_string CACHE CMAKE_BUILD_TYPE PROPERTY HELPSTRING) + set(CMAKE_BUILD_TYPE "${config}" CACHE STRING "${help_string}" FORCE) + endif() + set(CMAKE_TRY_COMPILE_CONFIGURATION "${CMAKE_BUILD_TYPE}" PARENT_SCOPE) + endif() +endfunction() + +function(remove_cxx_flag_from_all_configs flag) + get_all_configs(all_configs) + foreach(config IN LISTS all_configs) + string(TOUPPER "${config}" config_uppercase) + set(flags "${CMAKE_CXX_FLAGS_${config_uppercase}}") + separate_arguments(flags) + list(FILTER flags EXCLUDE REGEX "${flag}") + list(JOIN flags " " new_flags) + set(CMAKE_CXX_FLAGS_${config_uppercase} "${new_flags}" PARENT_SCOPE) + set(CMAKE_CXX_FLAGS_${config_uppercase} "${new_flags}" + CACHE STRING + "Flags used by the CXX compiler during ${config_uppercase} builds." + FORCE + ) + endforeach() +endfunction() + +function(replace_cxx_flag_in_config config old_flag new_flag) + string(TOUPPER "${config}" config_uppercase) + string(REGEX REPLACE "(^| )${old_flag}( |$)" "\\1${new_flag}\\2" new_flags "${CMAKE_CXX_FLAGS_${config_uppercase}}") + set(CMAKE_CXX_FLAGS_${config_uppercase} "${new_flags}" PARENT_SCOPE) + set(CMAKE_CXX_FLAGS_${config_uppercase} "${new_flags}" + CACHE STRING + "Flags used by the CXX compiler during ${config_uppercase} builds." + FORCE + ) +endfunction() + +set_default_config(RelWithDebInfo) + +# Redefine/adjust per-configuration flags. +target_compile_definitions(core_interface_debug INTERFACE + DEBUG + DEBUG_LOCKORDER + DEBUG_LOCKCONTENTION + RPC_DOC_CHECK + ABORT_ON_FAILED_ASSUME +) +# We leave assertions on. +if(MSVC) + remove_cxx_flag_from_all_configs(/DNDEBUG) +else() + remove_cxx_flag_from_all_configs(-DNDEBUG) + + # Adjust flags used by the CXX compiler during RELEASE builds. + # Prefer -O2 optimization level. (-O3 is CMake's default for Release for many compilers.) + replace_cxx_flag_in_config(Release -O3 -O2) + + are_flags_overridden(CMAKE_CXX_FLAGS_DEBUG cxx_flags_debug_overridden) + if(NOT cxx_flags_debug_overridden) + # Redefine flags used by the CXX compiler during DEBUG builds. + try_append_cxx_flags("-g3" RESULT_VAR compiler_supports_g3) + if(compiler_supports_g3) + replace_cxx_flag_in_config(Debug -g -g3) + endif() + unset(compiler_supports_g3) + + try_append_cxx_flags("-ftrapv" RESULT_VAR compiler_supports_ftrapv) + if(compiler_supports_ftrapv) + string(PREPEND CMAKE_CXX_FLAGS_DEBUG "-ftrapv ") + endif() + unset(compiler_supports_ftrapv) + + string(PREPEND CMAKE_CXX_FLAGS_DEBUG "-O0 ") + + set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" + CACHE STRING + "Flags used by the CXX compiler during DEBUG builds." + FORCE + ) + endif() + unset(cxx_flags_debug_overridden) +endif() |