Merge branch 'bugfix/even_more_cmake_fixes' into 'master'

Even more CMake fixes

See merge request idf/esp-idf!5097

CMakeLists.txt

@@ -74,35 +74,9 @@ foreach(component_target ${build_component_targets})
     idf_build_get_property(build_prefix __PREFIX)
     set(__idf_component_context 1)
     if(NOT prefix STREQUAL build_prefix)
-        add_subdirectory(${dir} ${prefix}_${_name} EXCLUDE_FROM_ALL)
+        add_subdirectory(${dir} ${prefix}_${_name})
     else()
-        add_subdirectory(${dir} ${_name} EXCLUDE_FROM_ALL)
+        add_subdirectory(${dir} ${_name})
     endif()
     set(__idf_component_context 0)
-endforeach()
-
-# Establish dependencies between components
-idf_build_get_property(build_components BUILD_COMPONENTS)
-foreach(build_component ${build_components})
-    __component_get_target(component_target ${build_component})
-    __component_get_property(component_lib ${component_target} COMPONENT_LIB)
-    __component_get_property(reqs ${component_target} __REQUIRES)
-    foreach(req ${reqs})
-        __component_get_property(req_lib ${req} COMPONENT_LIB)
-        if(TARGET ${req_lib})
-            set_property(TARGET ${component_lib} APPEND PROPERTY INTERFACE_LINK_LIBRARIES ${req_lib})
-        endif()
-    endforeach()
-
-    get_property(type TARGET ${component_lib} PROPERTY TYPE)
-    if(type STREQUAL STATIC_LIBRARY)
-        __component_get_property(reqs ${component_target} __REQUIRES)
-        __component_get_property(priv_reqs ${component_target} __PRIV_REQUIRES)
-        foreach(req ${reqs} ${priv_reqs})
-            __component_get_property(req_lib ${req} COMPONENT_LIB)
-            if(TARGET ${req_lib})
-                set_property(TARGET ${component_lib} APPEND PROPERTY LINK_LIBRARIES ${req_lib})
-            endif()
-        endforeach()
-    endif()
-endforeach()
+endforeach()

components/app_trace/CMakeLists.txt

@@ -31,4 +31,4 @@ register_component()
 # disable --coverage for this component, as it is used as transport
 # for gcov
 target_compile_options(${COMPONENT_LIB} PRIVATE "-fno-profile-arcs" "-fno-test-coverage")
-target_link_libraries(${COMPONENT_LIB} gcov ${LIBC} ${LIBM} gcc)
+target_link_libraries(${COMPONENT_LIB} PUBLIC gcov ${LIBC} ${LIBM} gcc)

components/app_update/CMakeLists.txt

@@ -8,7 +8,7 @@ register_component()
 
 # esp_app_desc structure is added as an undefined symbol because otherwise the
 # linker will ignore this structure as it has no other files depending on it.
-target_link_libraries(${COMPONENT_LIB} "-u esp_app_desc")
+target_link_libraries(${COMPONENT_LIB} INTERFACE "-u esp_app_desc")
 
 # cut PROJECT_VER and PROJECT_NAME to required 32 characters.
 idf_build_get_property(project_ver PROJECT_VER)

components/bootloader/subproject/main/CMakeLists.txt

@@ -7,4 +7,4 @@ idf_build_get_property(target IDF_TARGET)
 set(scripts "${target}.bootloader.ld"
             "${target}.bootloader.rom.ld")
 
-target_linker_script(${COMPONENT_LIB} "${scripts}")
+target_linker_script(${COMPONENT_LIB} INTERFACE "${scripts}")

components/bootloader_support/CMakeLists.txt

@@ -9,8 +9,8 @@ set(COMPONENT_SRCS "src/bootloader_clock.c"
 
 if(BOOTLOADER_BUILD)
     set(COMPONENT_ADD_INCLUDEDIRS "include include_bootloader")
-    set(COMPONENT_REQUIRES spi_flash soc) #unfortunately the header directly uses SOC registers
-    set(COMPONENT_PRIV_REQUIRES micro-ecc efuse)
+    set(COMPONENT_REQUIRES soc) #unfortunately the header directly uses SOC registers
+    set(COMPONENT_PRIV_REQUIRES micro-ecc spi_flash efuse)
     list(APPEND COMPONENT_SRCS "src/bootloader_init.c"
                                "src/${IDF_TARGET}/bootloader_sha.c"
                                "src/${IDF_TARGET}/flash_encrypt.c"
@@ -55,8 +55,8 @@ else()
                                "src/idf/secure_boot_signatures.c")
     set(COMPONENT_ADD_INCLUDEDIRS "include")
     set(COMPONENT_PRIV_INCLUDEDIRS "include_bootloader")
-    set(COMPONENT_REQUIRES mbedtls soc) #unfortunately the header directly uses SOC registers
-    set(COMPONENT_PRIV_REQUIRES spi_flash efuse)
+    set(COMPONENT_REQUIRES soc) #unfortunately the header directly uses SOC registers
+    set(COMPONENT_PRIV_REQUIRES spi_flash mbedtls efuse)
 endif()
 
 register_component()

components/bt/CMakeLists.txt

@@ -295,6 +295,6 @@ if(CONFIG_BT_ENABLED)
         target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-implicit-fallthrough -Wno-unused-const-variable)
     endif()
 
-    target_link_libraries(${COMPONENT_LIB} "-L${CMAKE_CURRENT_LIST_DIR}/lib")
-    target_link_libraries(${COMPONENT_LIB} btdm_app)
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-L${CMAKE_CURRENT_LIST_DIR}/lib")
+    target_link_libraries(${COMPONENT_LIB} PUBLIC btdm_app)
 endif()

components/cxx/CMakeLists.txt

@@ -2,9 +2,9 @@ set(COMPONENT_SRCS "cxx_exception_stubs.cpp"
                    "cxx_guards.cpp")
 register_component()
 
-target_link_libraries(${COMPONENT_LIB} stdc++ gcc)
-target_link_libraries(${COMPONENT_LIB} "-u __cxa_guard_dummy")
+target_link_libraries(${COMPONENT_LIB} PUBLIC stdc++ gcc)
+target_link_libraries(${COMPONENT_LIB} INTERFACE "-u __cxa_guard_dummy")
 
 if(NOT CONFIG_COMPILER_CXX_EXCEPTIONS)
-    target_link_libraries(${COMPONENT_LIB} "-u __cxx_fatal_exception")
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-u __cxx_fatal_exception")
 endif()

components/esp32/CMakeLists.txt

@@ -4,7 +4,7 @@ if(BOOTLOADER_BUILD)
     # For bootloader, all we need from esp32 is headers
     set(COMPONENT_ADD_INCLUDEDIRS include)
     register_component()
-    target_linker_script(${COMPONENT_LIB} "ld/esp32.peripherals.ld")
+    target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.peripherals.ld")
 else()
     # Regular app build
 
@@ -34,40 +34,41 @@ else()
                    "task_wdt.c")
     set(COMPONENT_ADD_INCLUDEDIRS "include")
 
-    set(COMPONENT_REQUIRES app_update driver esp_event efuse pthread soc) #unfortunately rom/uart uses SOC registers directly
+    set(COMPONENT_REQUIRES driver esp_event efuse soc) #unfortunately rom/uart uses SOC registers directly
 
     # driver is a public requirement because esp_sleep.h uses gpio_num_t & touch_pad_t
     # app_update is added here because cpu_start.c uses esp_ota_get_app_description() function.
     set(COMPONENT_PRIV_REQUIRES
-        app_trace app_update bootloader_support log mbedtls nvs_flash
+        app_trace app_update bootloader_support log mbedtls nvs_flash pthread
         smartconfig_ack spi_flash vfs wpa_supplicant espcoredump esp_common esp_wifi)
 
     set(COMPONENT_ADD_LDFRAGMENTS linker.lf ld/esp32_fragments.lf)
 
     register_component()
 
-    target_linker_script(${COMPONENT_LIB} "${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld")
+    target_linker_script(${COMPONENT_LIB} INTERFACE "${CMAKE_CURRENT_BINARY_DIR}/esp32_out.ld")
 
     # Rely on user code to define app_main
-    target_link_libraries(${COMPONENT_LIB} "-u app_main")
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-u app_main")
 
     if(CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY)
         # This has to be linked before esp32.project.ld
-        target_linker_script(${COMPONENT_LIB} "ld/esp32.extram.bss.ld")
+        target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.extram.bss.ld")
     endif()
 
     # Process the template file through the linker script generation mechanism, and use the output for linking the
     # final binary
-    target_linker_script(${COMPONENT_LIB} "${CMAKE_CURRENT_LIST_DIR}/ld/esp32.project.ld.in" PROCESS)
+    target_linker_script(${COMPONENT_LIB} INTERFACE "${CMAKE_CURRENT_LIST_DIR}/ld/esp32.project.ld.in" 
+                        PROCESS "${CMAKE_CURRENT_BINARY_DIR}/ld/esp32.project.ld")
 
-    target_linker_script(${COMPONENT_LIB} "ld/esp32.peripherals.ld")
-    target_link_libraries(${COMPONENT_LIB} gcc)
-    target_link_libraries(${COMPONENT_LIB} "-u call_user_start_cpu0")
+    target_linker_script(${COMPONENT_LIB} INTERFACE "ld/esp32.peripherals.ld")
+    target_link_libraries(${COMPONENT_LIB} PUBLIC gcc)
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-u call_user_start_cpu0")
 
     #ld_include_panic_highint_hdl is added as an undefined symbol because otherwise the
     #linker will ignore panic_highint_hdl.S as it has no other files depending on any
     #symbols in it.
-    target_link_libraries(${COMPONENT_LIB} "-u ld_include_panic_highint_hdl")
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-u ld_include_panic_highint_hdl")
 
     idf_build_get_property(sdkconfig_header SDKCONFIG_HEADER)
     get_filename_component(config_dir ${sdkconfig_header} DIRECTORY)
@@ -95,6 +96,6 @@ else()
         # To handle some corner cases, the same flag is set in project_include.cmake
         target_compile_options(${COMPONENT_LIB} PUBLIC -mfix-esp32-psram-cache-issue)
         # also, make sure we link with this option so correct toolchain libs are pulled in
-        target_link_libraries(${COMPONENT_LIB} -mfix-esp32-psram-cache-issue)
+        target_link_libraries(${COMPONENT_LIB} PUBLIC -mfix-esp32-psram-cache-issue)
     endif()
 endif()

components/esp_rom/CMakeLists.txt

@@ -9,7 +9,7 @@ if(BOOTLOADER_BUILD)
         "esp32/ld/esp32.rom.newlib-funcs.ld"
         "esp32/ld/esp32.rom.libgcc.ld"
         )
-    target_linker_script(${COMPONENT_LIB} "${scripts}")
+    target_linker_script(${COMPONENT_LIB} INTERFACE "${scripts}")
 else()
     # Regular app build
     set(COMPONENT_SRCS "esp_rom.c")
@@ -23,21 +23,21 @@ else()
         "esp32/ld/esp32.rom.syscalls.ld"
         "esp32/ld/esp32.rom.newlib-data.ld"
         )
-    target_linker_script(${COMPONENT_LIB} "${scripts}")
+    target_linker_script(${COMPONENT_LIB} INTERFACE "${scripts}")
 
     if(NOT CONFIG_SPIRAM_CACHE_WORKAROUND)
-        target_linker_script(${COMPONENT_LIB} "esp32/ld/esp32.rom.newlib-funcs.ld")
+        target_linker_script(${COMPONENT_LIB} INTERFACE "esp32/ld/esp32.rom.newlib-funcs.ld")
     endif()
 
     if(CONFIG_NEWLIB_NANO_FORMAT)
-        target_linker_script(${COMPONENT_LIB} "esp32/ld/esp32.rom.newlib-nano.ld")
+        target_linker_script(${COMPONENT_LIB} INTERFACE "esp32/ld/esp32.rom.newlib-nano.ld")
     endif()
 
     if(NOT GCC_NOT_5_2_0)
-        target_linker_script(${COMPONENT_LIB} "esp32/ld/esp32.rom.newlib-locale.ld")
+        target_linker_script(${COMPONENT_LIB} INTERFACE "esp32/ld/esp32.rom.newlib-locale.ld")
     endif()
 
     if(NOT CONFIG_SPI_FLASH_ROM_DRIVER_PATCH)
-        target_linker_script(${COMPONENT_LIB} "esp32/ld/esp32.rom.spiflash.ld")
+        target_linker_script(${COMPONENT_LIB} INTERFACE "esp32/ld/esp32.rom.spiflash.ld")
     endif()
 endif()

components/esp_wifi/CMakeLists.txt

@@ -8,22 +8,21 @@ set(COMPONENT_SRCS
     "src/wifi_init.c")
 set(COMPONENT_ADD_INCLUDEDIRS "include")
 set(COMPONENT_PRIV_INCLUDEDIRS)
-set(COMPONENT_REQUIRES wpa_supplicant smartconfig_ack)
-set(COMPONENT_PRIV_REQUIRES "nvs_flash")
+set(COMPONENT_PRIV_REQUIRES wpa_supplicant nvs_flash)
 
 if(NOT CONFIG_ESP32_NO_BLOBS)
     set(COMPONENT_ADD_LDFRAGMENTS "linker.lf")
 endif()
 
 register_component()
-target_link_libraries(${COMPONENT_LIB} "-L ${CMAKE_CURRENT_SOURCE_DIR}/lib_${IDF_TARGET}")
+target_link_libraries(${COMPONENT_LIB} PUBLIC "-L ${CMAKE_CURRENT_SOURCE_DIR}/lib_${IDF_TARGET}")
 
 if(NOT CONFIG_ESP32_NO_BLOBS)
     set(blobs coexist core espnow mesh net80211 phy pp rtc smartconfig wpa2 wpa wps)
     foreach(blob ${blobs})
         add_library(${blob} STATIC IMPORTED)
         set_property(TARGET ${blob} PROPERTY IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/lib_${IDF_TARGET}/lib${blob}.a)
-        target_link_libraries(${COMPONENT_LIB} ${blob})
+        target_link_libraries(${COMPONENT_LIB} PUBLIC ${blob})
 
         foreach(_blob ${blobs})
             if(NOT _blob STREQUAL ${blob})

components/freertos/CMakeLists.txt

@@ -25,7 +25,7 @@ set(COMPONENT_ADD_LDFRAGMENTS linker.lf)
 
 register_component()
 
-target_link_libraries(${COMPONENT_LIB} "-Wl,--undefined=uxTopUsedPriority")
+target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--undefined=uxTopUsedPriority")
 
 set_source_files_properties(
     tasks.c

components/heap/CMakeLists.txt

@@ -32,7 +32,7 @@ if(CONFIG_HEAP_TRACING)
         heap_caps_realloc_default)
 
     foreach(wrap ${WRAP_FUNCTIONS})
-        target_link_libraries(${COMPONENT_LIB} "-Wl,--wrap=${wrap}")
+        target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--wrap=${wrap}")
     endforeach()
 
 endif()

components/libsodium/CMakeLists.txt

@@ -126,7 +126,7 @@ endif()
 set(COMPONENT_ADD_INCLUDEDIRS ${SRC}/include port_include)
 set(COMPONENT_PRIV_INCLUDEDIRS ${SRC}/include/sodium port_include/sodium port)
 
-set(COMPONENT_REQUIRES mbedtls vfs)
+set(COMPONENT_REQUIRES mbedtls)
 register_component()
 
 target_compile_definitions(${COMPONENT_LIB} PRIVATE 

components/mbedtls/CMakeLists.txt

@@ -2,8 +2,6 @@ set(COMPONENT_ADD_INCLUDEDIRS "port/include" "mbedtls/include")
 set(COMPONENT_SRCS "mbedtls.c")
 set(COMPONENT_REQUIRES lwip)
 
-set(MBEDTLS_PRIV_REQUIRES ${IDF_COMPONENT_REQUIRES_COMMON} soc)
-
 register_component()
 
 # Only build mbedtls libraries
@@ -96,9 +94,4 @@ foreach(target ${mbedtls_targets})
 endforeach()
 
 # Link mbedtls libraries to component library
-target_link_libraries(${COMPONENT_LIB} ${mbedtls_targets})
-
-# Catch usage of deprecated mbedTLS functions when building tests
-if(mbedtls_test IN_LIST BUILD_TEST_COMPONENTS)
-    add_definitions(-DMBEDTLS_DEPRECATED_WARNING)
-endif()
+target_link_libraries(${COMPONENT_LIB} INTERFACE ${mbedtls_targets})

components/mbedtls/test/CMakeLists.txt

@@ -4,3 +4,9 @@ set(COMPONENT_ADD_INCLUDEDIRS ".")
 set(COMPONENT_REQUIRES unity test_utils mbedtls)
 
 register_component()
+
+idf_component_get_property(mbedtls mbedtls COMPONENT_LIB)
+target_compile_definitions(${mbedtls} PUBLIC "-DMBEDTLS_DEPRECATED_WARNING")
+target_compile_definitions(mbedtls PUBLIC "-DMBEDTLS_DEPRECATED_WARNING")
+target_compile_definitions(mbedcrypto PUBLIC "-DMBEDTLS_DEPRECATED_WARNING")
+target_compile_definitions(mbedx509 PUBLIC "-DMBEDTLS_DEPRECATED_WARNING")

components/newlib/CMakeLists.txt

@@ -42,8 +42,8 @@ list(APPEND COMPONENT_ADD_LDFRAGMENTS newlib.lf)
 
 register_component()
 
-if (LIB_PATH)
-    target_link_libraries(${COMPONENT_LIB} "-L ${LIB_PATH}")
+if(LIB_PATH)
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-L ${LIB_PATH}")
 endif()
 
 if(GCC_NOT_5_2_0)
@@ -51,13 +51,13 @@ if(GCC_NOT_5_2_0)
     add_library(extra INTERFACE)
     idf_component_get_property(newlib newlib COMPONENT_LIB)
     target_link_libraries(extra INTERFACE ${LIBC} ${LIBM} gcc "$<TARGET_FILE:${newlib}>")
-    target_link_libraries(${COMPONENT_LIB} extra)
+    target_link_libraries(${COMPONENT_LIB} PUBLIC extra)
 else()
-    target_link_libraries(${COMPONENT_LIB} ${LIBC} ${LIBM} gcc)
+    target_link_libraries(${COMPONENT_LIB} PUBLIC ${LIBC} ${LIBM} gcc)
 endif()
 
 set_source_files_properties(heap.c PROPERTIES COMPILE_FLAGS -fno-builtin)
 
 if(EXTRA_LINK_FLAGS)
-    target_link_libraries(${COMPONENT_LIB} "${EXTRA_LINK_FLAGS}")
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "${EXTRA_LINK_FLAGS}")
 endif()

components/protocomm/CMakeLists.txt

@@ -12,8 +12,7 @@ set(COMPONENT_SRCS  "src/common/protocomm.c"
                     "src/transports/protocomm_console.c"
                     "src/transports/protocomm_httpd.c")
 
-set(COMPONENT_REQUIRES protobuf-c bt)
-set(COMPONENT_PRIV_REQUIRES mbedtls console esp_http_server)
+set(COMPONENT_PRIV_REQUIRES protobuf-c mbedtls console esp_http_server bt)
 
 if(CONFIG_BT_ENABLED)
     if(CONFIG_BT_BLUEDROID_ENABLED)

components/spi_flash/CMakeLists.txt

@@ -9,8 +9,7 @@ else()
                    "flash_ops.c"
                    "partition.c"
                    "spi_flash_rom_patch.c")
-    set(COMPONENT_REQUIRES app_update)
-    set(COMPONENT_PRIV_REQUIRES bootloader_support soc)
+    set(COMPONENT_PRIV_REQUIRES bootloader_support app_update soc)
 endif()
 
 set(COMPONENT_ADD_INCLUDEDIRS include)

components/ulp/project_include.cmake

@@ -61,7 +61,7 @@ function(ulp_embed_binary app_name s_sources exp_dep_srcs)
 
         add_dependencies(${COMPONENT_LIB} ${app_name}_artifacts)
 
-        target_linker_script(${COMPONENT_LIB} ${CMAKE_CURRENT_BINARY_DIR}/${app_name}/${app_name}.ld)
+        target_linker_script(${COMPONENT_LIB} INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/${app_name}/${app_name}.ld)
         target_add_binary_data(${COMPONENT_LIB} ${CMAKE_CURRENT_BINARY_DIR}/${app_name}/${app_name}.bin BINARY)
     endif()
 endfunction()

components/vfs/CMakeLists.txt

@@ -6,4 +6,4 @@ register_component()
 
 # Some newlib syscalls are implemented in vfs.c, make sure these are always
 # seen by the linker
-target_link_libraries(${COMPONENT_LIB} "-u vfs_include_syscalls_impl")
+target_link_libraries(${COMPONENT_LIB} INTERFACE "-u vfs_include_syscalls_impl")

components/xtensa/CMakeLists.txt

@@ -7,4 +7,4 @@ set(COMPONENT_PRIV_REQUIRES soc)
 
 register_component()
 
-target_link_libraries(${COMPONENT_LIB} "${CMAKE_CURRENT_SOURCE_DIR}/${IDF_TARGET}/libhal.a")
+target_link_libraries(${COMPONENT_LIB} PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/${IDF_TARGET}/libhal.a")

examples/build_system/cmake/import_lib/main/CMakeLists.txt

@@ -23,4 +23,4 @@ endfunction()
 add_subdirectory(lib/tinyxml2)
 
 # Link tinyxml2 to main component
-target_link_libraries(${COMPONENT_LIB} tinyxml2)
+target_link_libraries(${COMPONENT_LIB} PUBLIC tinyxml2)

tools/cmake/build.cmake

@@ -195,7 +195,8 @@ function(__build_expand_requirements component_target)
     # Since there are circular dependencies, make sure that we do not infinitely
     # expand requirements for each component.
     idf_build_get_property(component_targets_seen __COMPONENT_TARGETS_SEEN)
-    if(component_target IN_LIST component_targets_seen)
+    __component_get_property(component_registered ${component_target} __COMPONENT_REGISTERED)
+    if(component_target IN_LIST component_targets_seen OR NOT component_registered)
         return()
     endif()
 
@@ -365,56 +366,13 @@ macro(idf_build_process target)
     # Check for required Python modules
     __build_check_python()
 
-    # Generate config values in different formats
-    idf_build_get_property(sdkconfig SDKCONFIG)
-    idf_build_get_property(sdkconfig_defaults SDKCONFIG_DEFAULTS)
-    __kconfig_generate_config("${sdkconfig}" "${sdkconfig_defaults}")
-    __build_import_configs()
-
-    # Write the partial build properties to a temporary file.
-    # The path to this generated file is set to a short-lived build
-    # property BUILD_PROPERTIES_FILE.
-    idf_build_get_property(build_dir BUILD_DIR)
-    set(build_properties_file ${build_dir}/build_properties.temp.cmake)
-    idf_build_set_property(BUILD_PROPERTIES_FILE ${build_properties_file})
-    __build_write_properties(${build_properties_file})
+    idf_build_set_property(__COMPONENT_REQUIRES_COMMON ${target} APPEND)
+    __component_get_requirements()
 
     # Perform early expansion of component CMakeLists.txt in CMake scripting mode.
     # It is here we retrieve the public and private requirements of each component.
     # It is also here we add the common component requirements to each component's
     # own requirements.
-    idf_build_get_property(component_targets __COMPONENT_TARGETS)
-    idf_build_set_property(__COMPONENT_REQUIRES_COMMON ${target} APPEND)
-    idf_build_get_property(common_reqs __COMPONENT_REQUIRES_COMMON)
-    foreach(component_target ${component_targets})
-        get_property(component_dir TARGET ${component_target} PROPERTY COMPONENT_DIR)
-        __component_get_requirements(error reqs priv_reqs ${component_dir})
-        if(error)
-            message(FATAL_ERROR "${error}")
-        endif()
-
-        list(APPEND reqs "${common_reqs}")
-
-        # Remove duplicates and the component itself from its requirements
-        __component_get_property(alias ${component_target} COMPONENT_ALIAS)
-        __component_get_property(_name ${component_target} COMPONENT_NAME)
-
-        # Prevent component from linking to itself.
-        if(reqs)
-            list(REMOVE_DUPLICATES reqs)
-            list(REMOVE_ITEM reqs ${alias} ${_name})
-        endif()
-
-        if(priv_reqs)
-            list(REMOVE_DUPLICATES priv_reqs)
-            list(REMOVE_ITEM priv_reqs ${alias} ${_name})
-        endif()
-
-        __component_set_property(${component_target} REQUIRES "${reqs}")
-        __component_set_property(${component_target} PRIV_REQUIRES "${priv_reqs}")
-    endforeach()
-    idf_build_unset_property(BUILD_PROPERTIES_FILE)
-    file(REMOVE ${build_properties_file})
 
     # Finally, do component expansion. In this case it simply means getting a final list
     # of build component targets given the requirements set by each component.
@@ -436,12 +394,19 @@ macro(idf_build_process target)
 
     # Get a list of common component requirements in component targets form (previously
     # we just have a list of component names)
+    idf_build_get_property(common_reqs __COMPONENT_REQUIRES_COMMON)
     foreach(common_req ${common_reqs})
         __component_get_target(component_target ${common_req})
         __component_get_property(lib ${component_target} COMPONENT_LIB)
         idf_build_set_property(___COMPONENT_REQUIRES_COMMON ${lib} APPEND)
     endforeach()
 
+    # Generate config values in different formats
+    idf_build_get_property(sdkconfig SDKCONFIG)
+    idf_build_get_property(sdkconfig_defaults SDKCONFIG_DEFAULTS)
+    __kconfig_generate_config("${sdkconfig}" "${sdkconfig_defaults}")
+    __build_import_configs()
+
     # Temporary trick to support both gcc5 and gcc8 builds
     if(CMAKE_C_COMPILER_VERSION VERSION_EQUAL 5.2.0)
         set(GCC_NOT_5_2_0 0 CACHE STRING "GCC is 5.2.0 version")
@@ -471,29 +436,8 @@ endmacro()
 # generating additional binary files, generating files related to flashing, etc.)
 function(idf_build_executable elf)
     # Propagate link dependencies from component library targets to the executable
-    idf_build_get_property(build_components BUILD_COMPONENTS)
-    foreach(build_component ${build_components})
-        get_target_property(type ${build_component} TYPE)
-        if(type STREQUAL "INTERFACE_LIBRARY")
-            get_target_property(iface_link_depends ${build_component} INTERFACE_LINK_DEPENDS)
-        else()
-            get_target_property(link_depends ${build_component} LINK_DEPENDS)
-            get_target_property(iface_link_depends ${build_component} INTERFACE_LINK_DEPENDS)
-        endif()
-        if(iface_link_depends)
-            list(APPEND _link_depends ${iface_link_depends})
-        endif()
-        if(link_depends)
-            list(APPEND _link_depends ${link_depends})
-        endif()
-    endforeach()
-
-    idf_build_get_property(link_depends LINK_DEPENDS)
-    if(link_depends)
-        list(APPEND _link_depends ${link_depends})
-    endif()
-
-    set_property(TARGET ${elf} APPEND PROPERTY LINK_DEPENDS "${_link_depends}")
+    idf_build_get_property(link_depends __LINK_DEPENDS)
+    set_property(TARGET ${elf} APPEND PROPERTY LINK_DEPENDS "${link_depends}")
 
     # Set the EXECUTABLE_NAME and EXECUTABLE properties since there are generator expression
     # from components that depend on it

tools/cmake/component.cmake

@@ -125,6 +125,23 @@ function(__component_dir_quick_check var component_dir)
     set(${var} ${res} PARENT_SCOPE)
 endfunction()
 
+#
+# Write a CMake file containing all component and their properties. This is possible because each component
+# keeps a list of all its properties.
+#
+function(__component_write_properties output_file)
+    idf_build_get_property(component_targets __COMPONENT_TARGETS)
+    foreach(component_target ${component_targets})
+        __component_get_property(component_properties ${component_target} __COMPONENT_PROPERTIES)
+        foreach(property ${component_properties})
+            __component_get_property(val ${component_target} ${property})
+            set(component_properties_text
+                "${component_properties_text}\nset(__component_${component_target}_${property} ${val})")
+        endforeach()
+        file(WRITE ${output_file} "${component_properties_text}")
+    endforeach()
+endfunction()
+
 #
 # Add a component to process in the build. The components are keeped tracked of in property
 # __COMPONENT_TARGETS in component target form.
@@ -184,44 +201,35 @@ endfunction()
 # Given a component directory, get the requirements by expanding it early. The expansion is performed
 # using a separate CMake script (the expansion is performed in a separate instance of CMake in scripting mode).
 #
-function(__component_get_requirements error requires_var priv_requires_var component_dir)
+function(__component_get_requirements)
     idf_build_get_property(idf_path IDF_PATH)
-    idf_build_get_property(build_properties_file BUILD_PROPERTIES_FILE)
-    idf_build_get_property(idf_target IDF_TARGET)
 
-    # This function assumes that the directory has been checked to contain a component, thus
-    # no check is performed here.
+    idf_build_get_property(build_dir BUILD_DIR)
+    set(build_properties_file ${build_dir}/build_properties.temp.cmake)
+    set(component_properties_file ${build_dir}/component_properties.temp.cmake)
+    set(component_requires_file ${build_dir}/component_requires.temp.cmake)
+
+    __build_write_properties(${build_properties_file})
+    __component_write_properties(${component_properties_file})
+
     execute_process(COMMAND "${CMAKE_COMMAND}"
-        -D "IDF_PATH=${idf_path}"
-        -D "IDF_TARGET=${idf_target}"
-        -D "COMPONENT_DIR=${component_dir}"
         -D "BUILD_PROPERTIES_FILE=${build_properties_file}"
-        -D "CMAKE_BUILD_EARLY_EXPANSION=1"
+        -D "COMPONENT_PROPERTIES_FILE=${component_properties_file}"
+        -D "COMPONENT_REQUIRES_FILE=${component_requires_file}"
         -P "${idf_path}/tools/cmake/scripts/component_get_requirements.cmake"
         RESULT_VARIABLE result
         ERROR_VARIABLE error
         )
 
     if(NOT result EQUAL 0)
-        set(error "${error}" PARENT_SCOPE)
-        return()
+        message(FATAL_ERROR "${error}")
     endif()
 
-    string(REGEX REPLACE ";" "\\\\;" _output "${error}")
-    string(REGEX REPLACE "\n" ";" _output "${_output}")
-    list(REVERSE _output)
-
-    if(_output)
-        list(GET _output 1 _output)
-
-        string(REGEX MATCH "\(.*\):::\(.*\)" _output "${_output}")
+    include(${component_requires_file})
 
-        string(REPLACE ":" ";" requires "${CMAKE_MATCH_1}")
-        string(REPLACE ":" ";" priv_requires "${CMAKE_MATCH_2}")
-    endif()
-
-    set(${requires_var} ${requires} PARENT_SCOPE)
-    set(${priv_requires_var} ${priv_requires} PARENT_SCOPE)
+    file(REMOVE ${build_properties_file})
+    file(REMOVE ${component_properties_file})
+    file(REMOVE ${component_requires_file})
 endfunction()
 
 # __component_add_sources, __component_check_target
@@ -280,6 +288,39 @@ macro(__component_check_target)
     endif()
 endmacro()
 
+# __component_set_dependencies, __component_set_all_dependencies
+#
+#  Links public and private requirements for the currently processed component
+macro(__component_set_dependencies reqs type)
+    foreach(req ${reqs})
+        if(req IN_LIST build_component_targets)
+            __component_get_property(req_lib ${req} COMPONENT_LIB)
+            target_link_libraries(${component_lib} ${type} ${req_lib})
+        endif()
+    endforeach()
+endmacro()
+
+macro(__component_set_all_dependencies)
+    __component_get_property(type ${component_target} COMPONENT_TYPE)
+    idf_build_get_property(build_component_targets __BUILD_COMPONENT_TARGETS)
+
+    if(NOT type STREQUAL CONFIG_ONLY)
+        __component_get_property(reqs ${component_target} __REQUIRES)
+        __component_set_dependencies("${reqs}" PUBLIC)
+
+        __component_get_property(priv_reqs ${component_target} __PRIV_REQUIRES)
+        __component_set_dependencies("${priv_reqs}" PRIVATE)
+    else()
+        __component_get_property(reqs ${component_target} __REQUIRES)
+        foreach(req ${reqs})
+            if(req IN_LIST build_component_targets)
+                __component_get_property(req_lib ${req} COMPONENT_LIB)
+                target_link_libraries(${component_lib} INTERFACE ${req_lib})
+            endif()
+        endforeach()
+    endif()
+endmacro()
+
 # idf_component_get_property
 #
 # @brief Retrieve the value of the specified component property
@@ -323,6 +364,7 @@ function(idf_component_set_property component property val)
     endif()
 endfunction()
 
+
 # idf_component_register
 #
 # @brief Register a component to the build, creating component library targets etc.
@@ -423,6 +465,9 @@ function(idf_component_register)
         __ldgen_add_fragment_files("${__LDFRAGMENTS}")
     endif()
 
+    # Set dependencies
+    __component_set_all_dependencies()
+
     # Add the component to built components
     idf_build_set_property(__BUILD_COMPONENTS ${component_lib} APPEND)
     idf_build_set_property(BUILD_COMPONENTS ${component_alias} APPEND)

tools/cmake/kconfig.cmake

@@ -88,14 +88,17 @@ endfunction()
 function(__kconfig_generate_config sdkconfig sdkconfig_defaults)
     # List all Kconfig and Kconfig.projbuild in known components
     idf_build_get_property(component_targets __COMPONENT_TARGETS)
+    idf_build_get_property(build_component_targets __BUILD_COMPONENT_TARGETS)
     foreach(component_target ${component_targets})
-        __component_get_property(kconfig ${component_target} KCONFIG)
-        __component_get_property(kconfig_projbuild ${component_target} KCONFIG_PROJBUILD)
-        if(kconfig)
-            list(APPEND kconfigs ${kconfig})
-        endif()
-        if(kconfig_projbuild)
-            list(APPEND kconfig_projbuilds ${kconfig_projbuild})
+        if(component_target IN_LIST build_component_targets)
+            __component_get_property(kconfig ${component_target} KCONFIG)
+            __component_get_property(kconfig_projbuild ${component_target} KCONFIG_PROJBUILD)
+            if(kconfig)
+                list(APPEND kconfigs ${kconfig})
+            endif()
+            if(kconfig_projbuild)
+                list(APPEND kconfig_projbuilds ${kconfig_projbuild})
+            endif()
         endif()
     endforeach()
 

tools/cmake/ldgen.cmake

@@ -27,7 +27,7 @@ endfunction()
 #
 # Passes a linker script template to the linker script generation tool for
 # processing
-function(__ldgen_process_template output_var template)
+function(__ldgen_process_template template output)
     idf_build_get_property(idf_target IDF_TARGET)
     idf_build_get_property(idf_path IDF_PATH)
 
@@ -36,11 +36,6 @@ function(__ldgen_process_template output_var template)
     file(GENERATE OUTPUT ${build_dir}/ldgen_libraries.in CONTENT $<JOIN:${ldgen_libraries},\n>)
     file(GENERATE OUTPUT ${build_dir}/ldgen_libraries INPUT ${build_dir}/ldgen_libraries.in)
 
-    get_filename_component(filename "${template}" NAME)
-
-    set(output ${CMAKE_CURRENT_BINARY_DIR}/${filename}.ld)
-    set(${output_var} ${output} PARENT_SCOPE)
-
     set_property(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
         APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES
         "${build_dir}/ldgen_libraries.in"
@@ -80,5 +75,5 @@ function(__ldgen_process_template output_var template)
     get_filename_component(_name ${output} NAME)
     add_custom_target(__ldgen_output_${_name} DEPENDS ${output})
     add_dependencies(__idf_build_target __ldgen_output_${_name})
-    idf_build_set_property(LINK_DEPENDS ${output} APPEND)
+    idf_build_set_property(__LINK_DEPENDS ${output} APPEND)
 endfunction()

tools/cmake/scripts/component_get_requirements.cmake

@@ -1,10 +1,5 @@
-include(${IDF_PATH}/tools/cmake/utilities.cmake)
-
 include("${BUILD_PROPERTIES_FILE}")
-include("${SDKCONFIG_CMAKE}")
-
-macro(require_idf_targets)
-endmacro()
+include("${COMPONENT_PROPERTIES_FILE}")
 
 function(idf_build_get_property var property)
     cmake_parse_arguments(_ "GENERATOR_EXPRESSION" "" "" ${ARGN})
@@ -12,17 +7,20 @@ function(idf_build_get_property var property)
         message(FATAL_ERROR "Getting build property generator expression not
                 supported before idf_component_register().")
     endif()
-    set(${var} ${property} PARENT_SCOPE)
+    set(${var} ${${property}} PARENT_SCOPE)
 endfunction()
 
-function(print_requires requires priv_requires)
-    spaces2list(requires)
-    spaces2list(priv_requires)
-    string(REPLACE ";" ":" requires "${requires}")
-    string(REPLACE ";" ":" priv_requires "${priv_requires}")
-    message("${requires}:::${priv_requires}")
+idf_build_get_property(idf_path IDF_PATH)
+include(${idf_path}/tools/cmake/utilities.cmake)
+
+function(__component_get_property var component_target property)
+    set(_property __component_${component_target}_${property})
+    set(${var} ${${_property}} PARENT_SCOPE)
 endfunction()
 
+macro(require_idf_targets)
+endmacro()
+
 macro(idf_component_register)
     set(options)
     set(single_value)
@@ -30,14 +28,16 @@ macro(idf_component_register)
                     INCLUDE_DIRS PRIV_INCLUDE_DIRS LDFRAGMENTS REQUIRES
                     PRIV_REQUIRES REQUIRED_IDF_TARGETS EMBED_FILES EMBED_TXTFILES)
     cmake_parse_arguments(_ "${options}" "${single_value}" "${multi_value}" "${ARGN}")
-    print_requires("${__REQUIRES}" "${__PRIV_REQUIRES}")
-    set(__is_component 1)
+    set(__component_requires "${__REQUIRES}")
+    set(__component_priv_requires "${__PRIV_REQUIRES}")
+    set(__component_registered 1)
     return()
 endmacro()
 
 macro(register_component)
-    print_requires("${COMPONENT_REQUIRES}" "${COMPONENT_PRIV_REQUIRES}")
-    set(__is_component 1)
+    set(__component_requires "${COMPONENT_REQUIRES}")
+    set(__component_priv_requires "${COMPONENT_PRIV_REQUIRES}")
+    set(__component_registered 1)
     return()
 endmacro()
 
@@ -45,5 +45,55 @@ macro(register_config_only_component)
     register_component()
 endmacro()
 
-set(CMAKE_BUILD_EARLY_EXPANSION)
-include(${COMPONENT_DIR}/CMakeLists.txt OPTIONAL)
+idf_build_get_property(__common_reqs __COMPONENT_REQUIRES_COMMON)
+idf_build_get_property(__component_targets __COMPONENT_TARGETS)
+
+function(__component_get_requirements)
+    # This is in a function (separate variable context) so that variables declared
+    # and set by the included CMakeLists.txt does not bleed into the next inclusion.
+    # We are only interested in the public and private requirements of components
+    __component_get_property(__component_dir ${__component_target} COMPONENT_DIR)
+    include(${__component_dir}/CMakeLists.txt OPTIONAL)
+
+    spaces2list(__component_requires)
+    spaces2list(__component_priv_requires)
+
+    set(__component_requires "${__component_requires}" PARENT_SCOPE)
+    set(__component_priv_requires "${__component_priv_requires}" PARENT_SCOPE)
+    set(__component_registered ${__component_registered} PARENT_SCOPE)
+endfunction()
+
+set(CMAKE_BUILD_EARLY_EXPANSION 1)
+foreach(__component_target ${__component_targets})
+    set(__component_requires "")
+    set(__component_priv_requires "")
+    set(__component_registered 0)
+
+    __component_get_requirements()
+
+    list(APPEND __component_requires "${__common_reqs}")
+
+    # Remove duplicates and the component itself from its requirements
+    __component_get_property(__component_alias ${__component_target} COMPONENT_ALIAS)
+    __component_get_property(__component_name ${__component_target} COMPONENT_NAME)
+
+    # Prevent component from linking to itself.
+    if(__component_requires)
+        list(REMOVE_DUPLICATES __component_requires)
+        list(REMOVE_ITEM __component_requires ${__component_alias} ${__component_name})
+    endif()
+
+    if(__component_requires)
+        list(REMOVE_DUPLICATES __component_priv_requires)
+        list(REMOVE_ITEM __component_priv_requires ${__component_alias} ${__component_name})
+    endif()
+
+    set(__contents
+"__component_set_property(${__component_target} REQUIRES \"${__component_requires}\")
+__component_set_property(${__component_target} PRIV_REQUIRES \"${__component_priv_requires}\")
+__component_set_property(${__component_target} __COMPONENT_REGISTERED ${__component_registered})"
+    )
+    set(__component_requires_contents "${__component_requires_contents}\n${__contents}")
+endforeach()
+
+file(WRITE ${COMPONENT_REQUIRES_FILE} "${__component_requires_contents}")

tools/cmake/utilities.cmake

@@ -130,26 +130,22 @@ endfunction()
 # Automatically adds a -L search path for the containing directory (if found),
 # and then adds -T with the filename only. This allows INCLUDE directives to be
 # used to include other linker scripts in the same directory.
-function(target_linker_script target scriptfiles)
-    cmake_parse_arguments(_ "PROCESS" "" "" ${ARGN})
+function(target_linker_script target deptype scriptfiles)
+    cmake_parse_arguments(_ "" "PROCESS" "" ${ARGN})
     foreach(scriptfile ${scriptfiles})
         get_filename_component(abs_script "${scriptfile}" ABSOLUTE)
         message(STATUS "Adding linker script ${abs_script}")
 
         if(__PROCESS)
-            __ldgen_process_template(output ${abs_script})
+            get_filename_component(output "${__PROCESS}" ABSOLUTE)
+            __ldgen_process_template(${abs_script} ${output})
             set(abs_script ${output})
         endif()
 
         get_filename_component(search_dir "${abs_script}" DIRECTORY)
         get_filename_component(scriptname "${abs_script}" NAME)
 
-        get_target_property(type ${target} TYPE)
-        if(type STREQUAL "INTERFACE_LIBRARY")
-            set(is_interface "INTERFACE")
-        endif()
-
-        if(is_interface)
+        if(deptype STREQUAL INTERFACE OR deptype STREQUAL PUBLIC)
             get_target_property(link_libraries "${target}" INTERFACE_LINK_LIBRARIES)
         else()
             get_target_property(link_libraries "${target}" LINK_LIBRARIES)
@@ -157,10 +153,10 @@ function(target_linker_script target scriptfiles)
 
         list(FIND "${link_libraries}" "-L ${search_dir}" found_search_dir)
         if(found_search_dir EQUAL "-1")  # not already added as a search path
-            target_link_libraries("${target}" "${is_interface}" "-L ${search_dir}")
+            target_link_libraries("${target}" "${deptype}" "-L ${search_dir}")
         endif()
 
-        target_link_libraries("${target}" "${is_interface}" "-T ${scriptname}")
+        target_link_libraries("${target}" "${deptype}" "-T ${scriptname}")
 
         # Note: In ESP-IDF, most targets are libraries and libary LINK_DEPENDS don't propagate to
         # executable(s) the library is linked to. Attach manually to executable once it is known.
@@ -168,11 +164,7 @@ function(target_linker_script target scriptfiles)
         # Property INTERFACE_LINK_DEPENDS is available in CMake 3.13 which should propagate link
         # dependencies.
         if(NOT __PROCESS)
-            if(is_interface)
-                set_property(TARGET ${target} APPEND PROPERTY INTERFACE_LINK_DEPENDS ${abs_script})
-            else()
-                set_property(TARGET ${target} APPEND PROPERTY LINK_DEPENDS ${abs_script})
-            endif()
+            idf_build_set_property(__LINK_DEPENDS ${abs_script} APPEND)
         endif()
     endforeach()
 endfunction()

tools/ldgen/ldgen.py

@@ -19,6 +19,8 @@ import argparse
 import sys
 import tempfile
 import subprocess
+import os
+import errno
 
 from fragments import FragmentFile
 from sdkconfig import SDKConfig
@@ -111,6 +113,14 @@ def main():
         with tempfile.TemporaryFile("w+") as output:
             script_model.write(output)
             output.seek(0)
+
+            if not os.path.exists(os.path.dirname(output_path)):
+                try:
+                    os.makedirs(os.path.dirname(output_path))
+                except OSError as exc:
+                    if exc.errno != errno.EEXIST:
+                        raise
+
             with open(output_path, "w") as f:  # only create output file after generation has suceeded
                 f.write(output.read())
     except LdGenFailure as e: