feat(esp8266): Bring esp32 component.mk from esp-idf

Prepare to modify for ESP8266.

components/esp8266/component.mk

@@ -0,0 +1,62 @@
+#
+# Component Makefile
+#
+
+COMPONENT_SRCDIRS := . hwcrypto
+LIBS ?=
+ifndef CONFIG_NO_BLOBS
+LIBS += core rtc net80211 pp wpa smartconfig coexist wps wpa2 espnow phy
+endif
+
+#Linker scripts used to link the final application.
+#Warning: These linker scripts are only used when the normal app is compiled; the bootloader
+#specifies its own scripts.
+LINKER_SCRIPTS += esp32.common.ld esp32.rom.ld esp32.peripherals.ld
+
+#SPI-RAM incompatible functions can be used in when the SPI RAM 
+#workaround is not enabled.
+ifndef CONFIG_SPIRAM_CACHE_WORKAROUND
+LINKER_SCRIPTS += esp32.rom.spiram_incompatible_fns.ld
+endif
+
+ifdef CONFIG_NEWLIB_NANO_FORMAT
+LINKER_SCRIPTS += esp32.rom.nanofmt.ld
+endif
+
+ifndef CONFIG_SPI_FLASH_ROM_DRIVER_PATCH
+LINKER_SCRIPTS += esp32.rom.spiflash.ld
+endif
+
+#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.
+COMPONENT_ADD_LDFLAGS += $(COMPONENT_PATH)/libhal.a \
+                         -L$(COMPONENT_PATH)/lib \
+                         $(addprefix -l,$(LIBS)) \
+                         -L $(COMPONENT_PATH)/ld \
+                         -T esp32_out.ld \
+                         -u ld_include_panic_highint_hdl \
+                         $(addprefix -T ,$(LINKER_SCRIPTS))
+
+ALL_LIB_FILES := $(patsubst %,$(COMPONENT_PATH)/lib/lib%.a,$(LIBS))
+
+COMPONENT_SUBMODULES += lib
+
+# final linking of project ELF depends on all binary libraries, and
+# all linker scripts (except esp32_out.ld, as this is code generated here.)
+COMPONENT_ADD_LINKER_DEPS := $(ALL_LIB_FILES) $(addprefix ld/,$(LINKER_SCRIPTS))
+
+# Preprocess esp32.ld linker script into esp32_out.ld
+#
+# The library doesn't really depend on esp32_out.ld, but it
+# saves us from having to add the target to a Makefile.projbuild
+$(COMPONENT_LIBRARY): esp32_out.ld
+
+esp32_out.ld: $(COMPONENT_PATH)/ld/esp32.ld ../include/sdkconfig.h
+	$(CC) -I ../include -C -P -x c -E $< -o $@
+
+COMPONENT_EXTRA_CLEAN := esp32_out.ld
+
+# disable stack protection in files which are involved in initialization of that feature
+stack_check.o: CFLAGS := $(filter-out -fstack-protector%, $(CFLAGS))
+cpu_start.o: CFLAGS := $(filter-out -fstack-protector%, $(CFLAGS))