esp-idf/components/newlib/component.mk

ifdef CONFIG_NEWLIB_NANO_FORMAT
LIBC := c_nano
else  # CONFIG_NEWLIB_NANO_FORMAT
LIBC := c
endif  # CONFIG_NEWLIB_NANO_FORMAT

# Order of linking matters: libnewlib.a should go before libc.a
COMPONENT_ADD_LDFLAGS := -lnewlib -l$(LIBC) -lm
COMPONENT_ADD_INCLUDEDIRS := platform_include

ifdef CONFIG_SPIRAM_CACHE_WORKAROUND
COMPONENT_ADD_LDFRAGMENTS := esp32-spiram-rom-functions-c.lf
endif

COMPONENT_PRIV_INCLUDEDIRS := priv_include
COMPONENT_SRCDIRS := . port

# Forces the linker to include heap, syscalls, and pthread from this component,
# instead of the implementations provided by newlib.
COMPONENT_ADD_LDFLAGS += -u newlib_include_heap_impl
COMPONENT_ADD_LDFLAGS += -u newlib_include_syscalls_impl

COMPONENT_ADD_LDFRAGMENTS += newlib.lf

heap.o: CFLAGS += -fno-builtin
newlib: when compiling with GCC8, use newlib headers and libraries from toolchain 2019-03-08 02:07:50 -05:00			`ifdef CONFIG_NEWLIB_NANO_FORMAT`
			`LIBC := c_nano`
			`else # CONFIG_NEWLIB_NANO_FORMAT`
			`LIBC := c`
			`endif # CONFIG_NEWLIB_NANO_FORMAT`

newlib: when compiling with GCC8, use newlib headers and libraries from toolchain 2019-04-01 03:21:12 -04:00			`# Order of linking matters: libnewlib.a should go before libc.a`
			`COMPONENT_ADD_LDFLAGS := -lnewlib -l$(LIBC) -lm`
newlib: when compiling with GCC8, use newlib headers and libraries from toolchain 2019-03-08 02:07:50 -05:00			`COMPONENT_ADD_INCLUDEDIRS := platform_include`

			`ifdef CONFIG_SPIRAM_CACHE_WORKAROUND`
			`COMPONENT_ADD_LDFRAGMENTS := esp32-spiram-rom-functions-c.lf`
			`endif`

newlib: separate low-level code in time.c implementation 2020-06-22 23:53:58 -04:00			`COMPONENT_PRIV_INCLUDEDIRS := priv_include`
			`COMPONENT_SRCDIRS := . port`

newlib: add _RETARGETABLE_LOCKING support This adds support for the retargetable locking implementation in newlib 3. This feature will be enabled in the future toolchain builds. With the present version of the toolchain, this code doesn't get used. When _RETARGETABLE_LOCKING gets enabled, newlib locking implementation will be modified as follows: - Legacy ESP-specific _lock_xxx functions are preserved. This is done because ROM copies of newlib in ESP32 and ESP32-S2 rely on these functions through the function pointer table. Also there is some code in IDF which still uses these locking functions. - New __retarget_lock_xxx functions are introduced. Newlib expects these functions to be provided by the system. These functions work pretty much the same way as the ESP-specific _lock_xxx functions, except one major difference: _lock_acquire receives the lock pointer by value, and as such doesn't support lazy initialization. - Static locks used by newlib are now explicitly initialized at startup. Since it is unlikely that these static locks are used at the same time, all compatible locks are set to point to the same mutex. This saves a bit of RAM. Note that there are still many locks not initialized statically, in particular those inside FILE structures. 2020-06-10 14:03:32 -04:00			`# Forces the linker to include heap, syscalls, and pthread from this component,`
newlib: when compiling with GCC8, use newlib headers and libraries from toolchain 2019-04-01 03:21:12 -04:00			`# instead of the implementations provided by newlib.`
			`COMPONENT_ADD_LDFLAGS += -u newlib_include_heap_impl`
			`COMPONENT_ADD_LDFLAGS += -u newlib_include_syscalls_impl`
newlib: force including IDF locks implementation 2019-03-17 23:47:00 -04:00
newlib: when compiling with GCC8, use newlib headers and libraries from toolchain 2019-04-01 03:21:12 -04:00			`COMPONENT_ADD_LDFRAGMENTS += newlib.lf`

			`heap.o: CFLAGS += -fno-builtin`