1
2
3TARGET_DIR=$(PWD)/.build
4ROM_ELF_FILE ?= /tmp/eagle.pro.rom.out
5
6all: newlib check_common_syms
7
8newlib_xtensa-2.2.0:
9	git submodule update --init
10
11newlib: newlib_xtensa-2.2.0
12
13newlib:
14	cd newlib_xtensa-2.2.0 && \
15	./configure \
16		--with-newlib \
17		--enable-multilib \
18		--disable-newlib-io-c99-formats \
19		--disable-newlib-supplied-syscalls  \
20		--enable-newlib-nano-formatted-io \
21		--enable-newlib-reent-small \
22		--enable-target-optspace \
23		--program-transform-name="s&^&xtensa-esp108-elf-&" \
24		--disable-option-checking \
25		--with-target-subdir=xtensa-esp108-elf \
26		--target=xtensa-esp108-elf \
27		--prefix=$(TARGET_DIR) \
28	&& CROSS_CFLAGS="-DSIGNAL_PROVIDED -DABORT_PROVIDED -DMALLOC_PROVIDED" make all install || true
29	cp -r $(TARGET_DIR)/xtensa-esp108-elf/{include,lib} ./
30	cp lib/libc.a lib/libc_rom.a
31	xtensa-esp108-elf-ar d lib/libc_rom.a lib_a-nano-vfprintf_float.o
32	xtensa-esp108-elf-ar d lib/libc_rom.a lib_a-nano-vfscanf_float.o
33	while read obj; do xtensa-esp108-elf-ar d lib/libc.a $$obj; done <libc_discard.list
34
35
36clean:
37	rm -rf newlib_xtensa-2.2.0 .build include lib
38
39check_common_syms:
40	@# get symbols in libc.a, except for _printf_float and _scanf_float
41	@xtensa-esp108-elf-nm lib/libc.a | grep -v -E "\W+U\W+" | awk '{print $$3}' | grep -v -E '^$$' | grep -v '_printf_float' | grep -v '_scanf_float' | sort >libc.syms
42	@# get symbols in ROM
43	@xtensa-esp108-elf-nm $(ROM_ELF_FILE) | grep -v -E '\W+U\W+' | awk '{print $$3}' | sort >rom.syms
44	@# check that there are no common symbols
45	@test $$(comm -12 rom.syms libc.syms | tee common.syms | wc -l) -eq 0
46
47.PHONY: all clean newlib
48