# The directory where we're store intermediate artifacts.
OBJDIR ?= $(CURDIR)/build
+# When the length is no larger than this threshold, we consider the
+# overhead of bulk memory opcodes to outweigh the performance benefit,
+# and fall back to the original musl implementation. See
+# https://github.com/WebAssembly/wasi-libc/pull/263 for relevant
+# discussion
+BULK_MEMORY_THRESHOLD ?= 32
+
# Variables from this point on are not meant to be overridable via the
# make command-line.
env/unsetenv.c \
unistd/posix_close.c \
stat/futimesat.c \
+ legacy/getpagesize.c \
) \
$(filter-out %/procfdname.c %/syscall.c %/syscall_ret.c %/vdso.c %/version.c, \
$(wildcard $(LIBC_TOP_HALF_MUSL_SRC_DIR)/internal/*.c)) \
$(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdio/vfscanf.c \
$(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/strtod.c \
$(LIBC_TOP_HALF_MUSL_SRC_DIR)/stdlib/wcstod.c
+BULK_MEMORY_SOURCES = \
+ $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memcpy.c \
+ $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memmove.c \
+ $(LIBC_TOP_HALF_MUSL_SRC_DIR)/string/memset.c
LIBC_TOP_HALF_HEADERS_PRIVATE = $(LIBC_TOP_HALF_DIR)/headers/private
LIBC_TOP_HALF_SOURCES = $(LIBC_TOP_HALF_DIR)/sources
LIBC_TOP_HALF_ALL_SOURCES = \
MUSL_PRINTSCAN_OBJS = $(call objs,$(MUSL_PRINTSCAN_SOURCES))
MUSL_PRINTSCAN_LONG_DOUBLE_OBJS = $(patsubst %.o,%.long-double.o,$(MUSL_PRINTSCAN_OBJS))
MUSL_PRINTSCAN_NO_FLOATING_POINT_OBJS = $(patsubst %.o,%.no-floating-point.o,$(MUSL_PRINTSCAN_OBJS))
+BULK_MEMORY_OBJS = $(call objs,$(BULK_MEMORY_SOURCES))
LIBWASI_EMULATED_MMAN_OBJS = $(call objs,$(LIBWASI_EMULATED_MMAN_SOURCES))
LIBWASI_EMULATED_PROCESS_CLOCKS_OBJS = $(call objs,$(LIBWASI_EMULATED_PROCESS_CLOCKS_SOURCES))
LIBWASI_EMULATED_GETPID_OBJS = $(call objs,$(LIBWASI_EMULATED_GETPID_SOURCES))
-D__wasilibc_printscan_no_floating_point \
-D__wasilibc_printscan_floating_point_support_option="\"remove -lc-printscan-no-floating-point from the link command\""
+# TODO: apply -mbulk-memory globally, once
+# https://github.com/llvm/llvm-project/issues/52618 is resolved
+$(BULK_MEMORY_OBJS): CFLAGS += \
+ -mbulk-memory
+
+$(BULK_MEMORY_OBJS): CFLAGS += \
+ -DBULK_MEMORY_THRESHOLD=$(BULK_MEMORY_THRESHOLD)
+
$(LIBWASI_EMULATED_SIGNAL_MUSL_OBJS): CFLAGS += \
-D_WASI_EMULATED_SIGNAL
> "$(SYSROOT_LIB)/libc.imports"
#
- # Generate a test file that includes all public header files.
+ # Generate a test file that includes all public C header files.
#
cd "$(SYSROOT_INC)" && \
- for header in $$(find . -type f -not -name mman.h -not -name signal.h -not -name times.h -not -name resource.h |grep -v /bits/); do \
+ for header in $$(find . -type f -not -name mman.h -not -name signal.h -not -name times.h -not -name resource.h |grep -v /bits/ |grep -v /c++/); do \
echo '#include <'$$header'>' | sed 's/\.\///' ; \
done |LC_ALL=C sort >$(SYSROOT_SHARE)/include-all.c ; \
cd - >/dev/null