mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
f6c7234e39
Running `make` in the wasm example modifies the `hello_prebuild.wasm`
example, making it easy to sneak in unwanted changes. This reverts such
an instance and modifies the Makefile to only recreate/update
`hello_prebuild.wasm` with:
make hello_prebuild.wasm
121 lines
2.6 KiB
Makefile
121 lines
2.6 KiB
Makefile
#sometimes there might not be a wasm-ld (Ubuntu:focal)
|
|
#lets check if we can find a specific version
|
|
|
|
#this is a kind of crazy which from
|
|
#https://www.gnu.org/software/make/manual/html_node/Call-Function.html#Call-Function
|
|
#see https://github.com/RIOT-OS/RIOT/pull/16806 and /16807 and /16776 for why
|
|
search_fn = $(firstword $(wildcard $(addsuffix /$(1),$(subst :, ,$(PATH)))))
|
|
|
|
ifneq ($(call search_fn,wasm-ld),)
|
|
WASM-LD ?= wasm-ld
|
|
else
|
|
ifneq ($(call search_fn,wasm-ld-11),)
|
|
LLVM_VERSION := 11
|
|
else
|
|
ifneq ($(call search_fn,wasm-ld-10),)
|
|
LLVM_VERSION := 10
|
|
else
|
|
ifneq ($(call search_fn,wasm-ld-9),)
|
|
LLVM_VERSION := 9
|
|
else
|
|
ifneq ($(call search_fn,wasm-ld-8),)
|
|
LLVM_VERSION := 8
|
|
endif
|
|
endif
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
ifneq ($(LLVM_VERSION),)
|
|
CLANG ?= clang-$(LLVM_VERSION)
|
|
CLANGPP ?= clang++-$(LLVM_VERSION)
|
|
WASM-LD ?= wasm-ld-$(LLVM_VERSION)
|
|
else
|
|
CLANG ?= clang
|
|
CLANGPP ?= clang++
|
|
endif
|
|
|
|
ifeq ($(WASM-LD),)
|
|
WASM-LD ?= echo "!! NO wasm-ld(-VERSION) found !!"; false
|
|
COPY_HELLO := YES
|
|
endif
|
|
|
|
LINK_FLAGS := -z stack-size=4096 \
|
|
--export main \
|
|
--export=__heap_base \
|
|
--export=__data_end \
|
|
--allow-undefined \
|
|
--strip-all \
|
|
--export-dynamic \
|
|
-error-limit=0 \
|
|
--lto-O3 \
|
|
-O3 \
|
|
--gc-sections\
|
|
--initial-memory=65536 \
|
|
--no-entry \
|
|
#
|
|
|
|
# --initial-memory may only be set in 64kB steps (pagesize of WASM)
|
|
# even though this one page is 64kB
|
|
# - data starts at 0, (1024 is chosen by lld)
|
|
# - stack starts at 4kB growing down
|
|
# - heap at 4kB growing up (see stack-size option)
|
|
# -> memory can be smaller than first page
|
|
# without stack-size option stack will start at 64kB
|
|
# -> heap needs a second page
|
|
# wasm-ld 8 and 11 do not need --initial-memory=64kB
|
|
|
|
COMPILE_FLAGS := -Wall \
|
|
--target=wasm32-unknown-unknown-wasm \
|
|
-emit-llvm \
|
|
-Os \
|
|
-flto \
|
|
-fvisibility=hidden \
|
|
-ffunction-sections \
|
|
-fdata-sections \
|
|
|
|
#one might consider adding these
|
|
# -nostartfiles \
|
|
# --nostdlib \
|
|
# --nostdinc \
|
|
# -std=c++14 \
|
|
|
|
%.show: %.wasm
|
|
wasm2wat $<
|
|
|
|
%.wasm: %.o Makefile
|
|
$(WASM-LD) -o $@ $(LINK_FLAGS) $<
|
|
|
|
|
|
%.o: %.cpp Makefile FORCE
|
|
$(CLANGPP) \
|
|
-c \
|
|
$(COMPILE_FLAGS) \
|
|
-o $@ \
|
|
$<
|
|
|
|
%.o: %.c Makefile FORCE
|
|
$(CLANG)\
|
|
-c \
|
|
$(COMPILE_FLAGS) \
|
|
-o $@ \
|
|
$<
|
|
|
|
%.wat: %.wasm Makefile
|
|
wasm2wat -o $@ $<
|
|
|
|
hello.wasm:
|
|
|
|
ifeq ($(COPY_HELLO),YES)
|
|
hello.wasm: hello_prebuild.wasm
|
|
@echo "!! NO wasm-ld(-VERSION) found !!"
|
|
@echo "!! copying hello_prebuild.wasm !! "
|
|
cp hello_prebuild.wasm hello.wasm
|
|
else
|
|
hello_prebuild.wasm: hello.wasm
|
|
cp hello.wasm hello_prebuild.wasm
|
|
endif
|
|
|
|
|
|
.PHONY: FORCE
|