alex/esp-idf
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3a6b665b90
esp-idf/CMakeLists.txt
Mahavir Jain 3dc80527ab
feat: add compiler config for not merging const sections 
Probably GCC-13.x and on-wards uses "-fmerge-constants" to merge
the const section (string/floating-point) across compilation units.
This makes it difficult to properly analyze the size output of rodata
section across libraries, the merged section (big in size) is showed
across a single library.

The config option added here can help to disable this compiler behavior
and help to provide better size analysis. It can be used during
development phase only as it increases rodata section size.
2024-07-15 10:04:55 +05:30

289 lines
12 KiB
CMake
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cmake_minimum_required(VERSION 3.16)
project(esp-idf C CXX ASM)
if(CMAKE_CURRENT_LIST_DIR STREQUAL CMAKE_SOURCE_DIR)
message(FATAL_ERROR "Current directory '${CMAKE_CURRENT_LIST_DIR}' is not buildable. "
"Change directories to one of the example projects in '${CMAKE_CURRENT_LIST_DIR}/examples' and try "
"again.")
endif()
# Variables compile_options, c_compile_options, cxx_compile_options, compile_definitions, link_options shall
# not be unset as they may already contain flags, set by toolchain-TARGET.cmake files.
# Add the following build specifications here, since these seem to be dependent
# on config values on the root Kconfig.
if(NOT BOOTLOADER_BUILD)
if(CONFIG_COMPILER_OPTIMIZATION_SIZE)
list(APPEND compile_options "-Os")
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
list(APPEND compile_options "-freorder-blocks")
endif()
elseif(CONFIG_COMPILER_OPTIMIZATION_DEBUG)
list(APPEND compile_options "-Og")
if(CMAKE_C_COMPILER_ID MATCHES "GNU" AND NOT CONFIG_IDF_TARGET_LINUX)
list(APPEND compile_options "-fno-shrink-wrap") # Disable shrink-wrapping to reduce binary size
endif()
elseif(CONFIG_COMPILER_OPTIMIZATION_NONE)
list(APPEND compile_options "-O0")
elseif(CONFIG_COMPILER_OPTIMIZATION_PERF)
list(APPEND compile_options "-O2")
endif()
else() # BOOTLOADER_BUILD
if(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_SIZE)
list(APPEND compile_options "-Os")
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
list(APPEND compile_options "-freorder-blocks")
endif()
elseif(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_DEBUG)
list(APPEND compile_options "-Og")
if(CMAKE_C_COMPILER_ID MATCHES "GNU" AND NOT CONFIG_IDF_TARGET_LINUX)
list(APPEND compile_options "-fno-shrink-wrap") # Disable shrink-wrapping to reduce binary size
endif()
elseif(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_NONE)
list(APPEND compile_options "-O0")
elseif(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_PERF)
list(APPEND compile_options "-O2")
endif()
endif()
if(CONFIG_COMPILER_CXX_EXCEPTIONS)
list(APPEND cxx_compile_options "-fexceptions")
else()
list(APPEND cxx_compile_options "-fno-exceptions")
endif()
if(CONFIG_COMPILER_CXX_RTTI)
list(APPEND cxx_compile_options "-frtti")
else()
list(APPEND cxx_compile_options "-fno-rtti")
list(APPEND link_options "-fno-rtti") # used to invoke correct multilib variant (no-rtti) during linking
endif()
if(CONFIG_COMPILER_SAVE_RESTORE_LIBCALLS)
list(APPEND compile_options "-msave-restore")
endif()
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
list(APPEND c_compile_options "-Wno-old-style-declaration")
endif()
# Clang finds some warnings in IDF code which GCC doesn't.
# All these warnings should be fixed before Clang is presented
# as a toolchain choice for users.
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
# Clang checks Doxygen comments for being in sync with function prototype.
# There are some inconsistencies, especially in ROM headers.
list(APPEND compile_options "-Wno-documentation")
# GCC allows repeated typedefs when the source and target types are the same.
# Clang doesn't allow this. This occurs in many components due to forward
# declarations.
list(APPEND compile_options "-Wno-typedef-redefinition")
# This issue is seemingly related to newlib's char type functions.
# Fix is not clear yet.
list(APPEND compile_options "-Wno-char-subscripts")
# Clang seems to notice format string issues which GCC doesn't.
list(APPEND compile_options "-Wno-format-security")
# Logic bug in essl component
list(APPEND compile_options "-Wno-tautological-overlap-compare")
# Some pointer checks in mDNS component check addresses which can't be NULL
list(APPEND compile_options "-Wno-tautological-pointer-compare")
# Similar to the above, in tcp_transport
list(APPEND compile_options "-Wno-pointer-bool-conversion")
# mbedTLS md5.c triggers this warning in md5_test_buf (false positive)
list(APPEND compile_options "-Wno-string-concatenation")
# multiple cases of implicit conversions between unrelated enum types
list(APPEND compile_options "-Wno-enum-conversion")
# When IRAM_ATTR is specified both in function declaration and definition,
# it produces different section names, since section names include __COUNTER__.
# Occurs in multiple places.
list(APPEND compile_options "-Wno-section")
# Multiple cases of attributes unknown to clang, for example
# __attribute__((optimize("-O3")))
list(APPEND compile_options "-Wno-unknown-attributes")
# Disable Clang warnings for atomic operations with access size
# more then 4 bytes
list(APPEND compile_options "-Wno-atomic-alignment")
# several warnings in wpa_supplicant component
list(APPEND compile_options "-Wno-unused-but-set-variable")
# Clang also produces many -Wunused-function warnings which GCC doesn't.
list(APPEND compile_options "-Wno-unused-function")
# many warnings in bluedroid code
# warning: field 'hdr' with variable sized type 'BT_HDR' not at the end of a struct or class is a GNU extension
list(APPEND compile_options "-Wno-gnu-variable-sized-type-not-at-end")
# several warnings in bluedroid code
list(APPEND compile_options "-Wno-constant-logical-operand")
# warning: '_Static_assert' with no message is a C2x extension
list(APPEND compile_options "-Wno-c2x-extensions")
# warning on xMPU_SETTINGS for esp32s2 has size 0 for C and 1 for C++
list(APPEND compile_options "-Wno-extern-c-compat")
if(NOT (CONFIG_IDF_TARGET_LINUX AND CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin"))
# warning: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1
list(APPEND compile_options "-Wno-single-bit-bitfield-constant-conversion")
endif()
endif()
# More warnings may exist in unit tests and example projects.
if(CONFIG_COMPILER_WARN_WRITE_STRINGS)
list(APPEND compile_options "-Wwrite-strings")
endif()
if(CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE)
list(APPEND compile_definitions "-DNDEBUG")
endif()
if(CONFIG_COMPILER_NO_MERGE_CONSTANTS)
list(APPEND compile_options "-fno-merge-constants")
endif()
if(CONFIG_COMPILER_STACK_CHECK_MODE_NORM)
list(APPEND compile_options "-fstack-protector")
elseif(CONFIG_COMPILER_STACK_CHECK_MODE_STRONG)
list(APPEND compile_options "-fstack-protector-strong")
elseif(CONFIG_COMPILER_STACK_CHECK_MODE_ALL)
list(APPEND compile_options "-fstack-protector-all")
endif()
if(CONFIG_COMPILER_DUMP_RTL_FILES)
list(APPEND compile_options "-fdump-rtl-expand")
endif()
if(NOT ${CMAKE_C_COMPILER_VERSION} VERSION_LESS 8.0.0)
if(CONFIG_COMPILER_HIDE_PATHS_MACROS)
list(APPEND compile_options "-fmacro-prefix-map=${CMAKE_SOURCE_DIR}=.")
list(APPEND compile_options "-fmacro-prefix-map=${IDF_PATH}=/IDF")
endif()
if(CONFIG_APP_REPRODUCIBLE_BUILD)
idf_build_set_property(DEBUG_PREFIX_MAP_GDBINIT "${BUILD_DIR}/prefix_map_gdbinit")
list(APPEND compile_options "-fdebug-prefix-map=${IDF_PATH}=/IDF")
list(APPEND compile_options "-fdebug-prefix-map=${PROJECT_DIR}=/IDF_PROJECT")
list(APPEND compile_options "-fdebug-prefix-map=${BUILD_DIR}=/IDF_BUILD")
# component dirs
idf_build_get_property(python PYTHON)
idf_build_get_property(idf_path IDF_PATH)
idf_build_get_property(component_dirs BUILD_COMPONENT_DIRS)
execute_process(
COMMAND ${python}
"${idf_path}/tools/generate_debug_prefix_map.py"
"${BUILD_DIR}"
"${component_dirs}"
OUTPUT_VARIABLE result
RESULT_VARIABLE ret
)
if(NOT ret EQUAL 0)
message(FATAL_ERROR "This is a bug. Please report to https://github.com/espressif/esp-idf/issues")
endif()
spaces2list(result)
list(LENGTH component_dirs length)
math(EXPR max_index "${length} - 1")
foreach(index RANGE ${max_index})
list(GET component_dirs ${index} folder)
list(GET result ${index} after)
list(APPEND compile_options "-fdebug-prefix-map=${folder}=${after}")
endforeach()
endif()
endif()
if(CONFIG_COMPILER_DISABLE_GCC12_WARNINGS)
list(APPEND compile_options "-Wno-address"
"-Wno-use-after-free")
endif()
if(CONFIG_COMPILER_DISABLE_GCC13_WARNINGS)
list(APPEND compile_options "-Wno-xor-used-as-pow")
list(APPEND c_compile_options "-Wno-enum-int-mismatch")
list(APPEND cxx_compile_options "-Wno-self-move"
"-Wno-dangling-reference")
endif()
if(CONFIG_COMPILER_DISABLE_DEFAULT_ERRORS)
if(NOT CMAKE_C_COMPILER_ID MATCHES "Clang")
idf_build_replace_option_from_property(COMPILE_OPTIONS "-Werror" "-Werror=all")
endif()
endif()
# GCC-specific options
if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
list(APPEND compile_options "-fstrict-volatile-bitfields")
if(CONFIG_COMPILER_STATIC_ANALYZER)
list(APPEND compile_options "-fanalyzer")
endif()
endif()
if(CONFIG_ESP_SYSTEM_USE_EH_FRAME)
list(APPEND compile_options "-fasynchronous-unwind-tables")
list(APPEND link_options "-Wl,--eh-frame-hdr")
endif()
list(APPEND link_options "-fno-lto")
if(CONFIG_IDF_TARGET_LINUX AND CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
list(APPEND link_options "-Wl,-dead_strip")
list(APPEND link_options "-Wl,-warn_commons")
else()
list(APPEND link_options "-Wl,--gc-sections")
list(APPEND link_options "-Wl,--warn-common")
endif()
# SMP FreeRTOS user provided minimal idle hook. This allows the user to provide
# their own copy of vApplicationPassiveIdleHook()
if(CONFIG_FREERTOS_USE_PASSIVE_IDLE_HOOK)
list(APPEND link_options "-Wl,--wrap=vApplicationPassiveIdleHook")
endif()
# Placing jump tables in flash would cause issues with code that required
# to be placed in IRAM
list(APPEND compile_options "-fno-jump-tables")
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
# This flag is GCC-specific.
# Not clear yet if some other flag should be used for Clang.
list(APPEND compile_options "-fno-tree-switch-conversion")
endif()
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
list(APPEND compile_options "-fno-use-cxa-atexit")
endif()
if(COMPILER_RT_LIB_NAME)
list(APPEND link_options "-rtlib=${CONFIG_COMPILER_RT_LIB_NAME}")
endif()
idf_build_set_property(COMPILE_OPTIONS "${compile_options}" APPEND)
idf_build_set_property(C_COMPILE_OPTIONS "${c_compile_options}" APPEND)
idf_build_set_property(CXX_COMPILE_OPTIONS "${cxx_compile_options}" APPEND)
idf_build_set_property(ASM_COMPILE_OPTIONS "${asm_compile_options}" APPEND)
idf_build_set_property(COMPILE_DEFINITIONS "${compile_definitions}" APPEND)
idf_build_set_property(LINK_OPTIONS "${link_options}" APPEND)
idf_build_get_property(build_component_targets __BUILD_COMPONENT_TARGETS)
# Add each component as a subdirectory, processing each component's CMakeLists.txt
foreach(component_target ${build_component_targets})
__component_get_property(dir ${component_target} COMPONENT_DIR)
__component_get_property(_name ${component_target} COMPONENT_NAME)
__component_get_property(prefix ${component_target} __PREFIX)
__component_get_property(alias ${component_target} COMPONENT_ALIAS)
set(COMPONENT_NAME ${_name})
set(COMPONENT_DIR ${dir})
set(COMPONENT_ALIAS ${alias})
set(COMPONENT_PATH ${dir}) # for backward compatibility only, COMPONENT_DIR is preferred
idf_build_get_property(build_prefix __PREFIX)
set(__idf_component_context 1)
if(NOT prefix STREQUAL build_prefix)
add_subdirectory(${dir} ${prefix}_${_name})
else()
add_subdirectory(${dir} ${_name})
endif()
set(__idf_component_context 0)
endforeach()
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