Makefile

   1 # These variables are specifically meant to be overridable via
   2 # the make command-line.
   3 WASM_CC = clang
   4 WASM_CFLAGS = -O2
   5 WASM_TARGET_FLAGS = --target=wasm32
   6 SYSROOT = sysroot
   7 # single or posix
   8 THREAD_MODEL = single
   9
  10 # These variables describe the locations of various files and
  11 # directories in the source tree.
  12 BASICS_DIR = basics
  13 BASICS_INC = $(BASICS_DIR)/include
  14 BASICS_LIBC_DIR = $(BASICS_DIR)/libc
  15 BASICS_LIBC_SOURCES = $(BASICS_LIBC_DIR)/string.c
  16 DLMALLOC_DIR = dlmalloc
  17 DLMALLOC_SRC_DIR = $(DLMALLOC_DIR)/src
  18 DLMALLOC_SOURCES = $(DLMALLOC_SRC_DIR)/wrapper.c
  19 DLMALLOC_INC = $(DLMALLOC_DIR)/include
  20
  21 # Configure support for threads.
  22 ifeq ($(THREADS), single)
  23 WASM_CFLAGS += -mthread-model single -DWASM_THREAD_MODEL_SINGLE
  24 endif
  25 ifeq ($(THREADS), posix)
  26 WASM_CFLAGS += -mthread-model posix -DWASM_THREAD_MODEL_POSIX
  27 endif
  28
  29 .PHONY: $(SYSROOT)
  30 $(SYSROOT):
  31         $(RM) -r "$(SYSROOT)"
  32         mkdir -p "$(SYSROOT)/usr"
  33
  34         #
  35         # Install the include files.
  36         #
  37         cp -r  "$(BASICS_INC)" "$(SYSROOT)/usr"
  38
  39         #
  40         # Build the C startup files.
  41         #
  42         $(RM) *.o
  43         "$(WASM_CC)" $(WASM_CFLAGS) $(WASM_TARGET_FLAGS) --sysroot="$(SYSROOT)" -c $(BASICS_LIBC_DIR)/crt*.s
  44         mkdir -p "$(SYSROOT)/lib"
  45         mv *.o "$(SYSROOT)/lib"
  46
  47         #
  48         # Compile and install the libc-subset source files.
  49         #
  50         $(RM) *.o
  51         "$(WASM_CC)" $(WASM_CFLAGS) $(WASM_TARGET_FLAGS) --sysroot="$(SYSROOT)" -c $(BASICS_LIBC_SOURCES)
  52         mkdir -p "$(SYSROOT)/lib"
  53         $(AR) crs "$(SYSROOT)/lib/libc-basics.a" *.o
  54         $(RM) *.o
  55
  56         #
  57         # Compile and install the dlmalloc source files.
  58         #
  59         $(RM) *.o
  60         "$(WASM_CC)" $(WASM_CFLAGS) $(WASM_TARGET_FLAGS) --sysroot="$(SYSROOT)" -c $(DLMALLOC_SOURCES) -I $(DLMALLOC_INC)
  61         mkdir -p "$(SYSROOT)/lib"
  62         $(AR) crs "$(SYSROOT)/lib/libc-dlmalloc.a" *.o
  63         $(RM) *.o