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# Some common Makefile stuff
# Look for wasi-sysroot in some common places, falling back
# to provided WASI_SYSROOT
ifneq ("$(wildcard /usr/wasm32-wasi)", "")
# Fedora
WASI_SYSROOT ?= /usr/wasm32-wasi
else ifneq ("$(wildcard /usr/local/share/wasi-sysroot)", "")
# FreeBSD
WASI_SYSROOT ?= /usr/local/share/wasi-sysroot
endif
export WASI_SYSROOT
# By default compiler etc output is hidden, use
# make V=1 ...
# to show it
v = @
ifeq ($V,1)
v =
endif
# Optionally enable debugging builds with
# make D=1 ...
# -g is always used, this just changes the optimisation level.
# On GCC this would be -Og, however according to the clang-16(1)
# man page, -O0 'generates the most debuggable code'.
ifeq ($D,1)
CFLAGS += -O0
else
CFLAGS += -O2
endif
# Optionally enable Werror with
# make E=1 ...
ifeq ($E,1)
CFLAGS += -Werror
endif
# Pretty print compiler etc actions...
PP_CC = @echo ' CC '
PP_AR = @echo ' AR '
PP_CCLNK = @echo ' CCLNK '
PP_GEN = @echo ' GEN '
CC = clang
CFLAGS += -Wall -Wextra -Wdeclaration-after-statement -Wvla \
-Wmissing-prototypes -Wstrict-prototypes -Wold-style-definition \
-Wimplicit-function-declaration -Wimplicit-int -Wint-conversion \
-std=gnu11 -g -fno-common -fno-strict-aliasing \
--target=wasm32-wasi --sysroot=$(WASI_SYSROOT)
LDFLAGS = -Wl,--no-entry,--export=__heap_base,--export=__data_end,--export=malloc,--export=free,--stack-first,-z,stack-size=$$((8*1024*1024)) \
-mexec-model=reactor --rtlib=compiler-rt
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