Android.mk

   1 #
   2 # Copyright (C) 2019 The Android-x86 Open Source Project
   3 #
   4 # Licensed under the standard MIT license.
   5 # See the COPYRIGHT in the same directory.
   6 #
   7
   8 LOCAL_PATH := $(call my-dir)
   9
  10 include $(CLEAR_VARS)
  11
  12 LOCAL_MODULE := libc-musl
  13 LOCAL_CC := $(TARGET_CC)
  14
  15 include $(LOCAL_PATH)/common.mk
  16
  17 MUSL_ARCH := $(TARGET_ARCH)
  18 MUSL_SRC_DIRS := $(addprefix $(LOCAL_PATH)/,src/* crt ldso)
  19 MUSL_BASE_SRCS := $(sort $(wildcard $(addsuffix /*.c,$(MUSL_SRC_DIRS))))
  20 MUSL_ARCH_SRCS := $(sort $(wildcard $(addsuffix /$(MUSL_ARCH)/*.[csS],$(MUSL_SRC_DIRS))))
  21 MUSL_REPLACED_SRCS := $(addsuffix .c,$(subst $(MUSL_ARCH)/,,$(basename $(MUSL_ARCH_SRCS))))
  22 MUSL_LDSO_PATHNAME := $(TARGET_OUT_VENDOR_SHARED_LIBRARIES)/$(LOCAL_MODULE).so
  23 MUSL_EMPTY_LIB_NAMES := m rt pthread crypt util xnet resolv dl
  24
  25 MUSL_SRC_FILES := $(subst $(LOCAL_PATH)/,,$(filter-out $(MUSL_REPLACED_SRCS),$(MUSL_BASE_SRCS)) $(MUSL_ARCH_SRCS))
  26 MUSL_CRT_SRCS := $(filter crt/%,$(MUSL_SRC_FILES))
  27 LOCAL_SRC_FILES := $(filter-out $(MUSL_CRT_SRCS),$(MUSL_SRC_FILES))
  28
  29 LOCAL_C_INCLUDES := $(addprefix $(LOCAL_PATH)/, \
  30         arch/$(MUSL_ARCH) \
  31         arch/generic \
  32         src/include \
  33         src/internal \
  34         include)
  35
  36 LOCAL_CFLAGS := -std=c99 -nostdinc \
  37         -ffreestanding -fexcess-precision=standard -frounding-math \
  38         -Wa,--noexecstack -D_XOPEN_SOURCE=700 -fomit-frame-pointer \
  39         -fno-unwind-tables -fno-asynchronous-unwind-tables \
  40         -ffunction-sections -fdata-sections \
  41         -Werror=implicit-function-declaration -Werror=implicit-int \
  42         -Werror=pointer-sign -Werror=pointer-arith -fno-stack-protector \
  43         -Os -pipe
  44
  45 intermediates := $(call local-intermediates-dir)
  46 MUSL_LIBC_SYS := $(intermediates)
  47
  48 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_C_INCLUDES)
  49
  50 LOCAL_GENERATED_SOURCES := \
  51         $(intermediates)/bits/alltypes.h \
  52         $(intermediates)/bits/syscall.h \
  53         $(intermediates)/version.h
  54
  55 $(intermediates)/bits/alltypes.h: $(LOCAL_PATH)/tools/mkalltypes.sed $(LOCAL_PATH)/arch/$(MUSL_ARCH)/bits/alltypes.h.in $(LOCAL_PATH)/include/alltypes.h.in
  56         sed -f $^ > $@
  57
  58 $(intermediates)/bits/syscall.h: $(LOCAL_PATH)/arch/$(MUSL_ARCH)/bits/syscall.h.in | $(ACP)
  59         $(ACP) $< $@
  60         sed -n -e s/__NR_/SYS_/p < $< >> $@
  61
  62 $(intermediates)/version.h: $(wildcard $(LOCAL_PATH)/VERSION $(LOCAL_PATH)/.git)
  63         echo "#define VERSION \"$$(cd $(<D); sh tools/version.sh)\"" > $@
  64
  65 MUSL_CRT_OBJS := $(addsuffix .o,$(basename $(MUSL_CRT_SRCS:%=$(intermediates)/%)))
  66 $(MUSL_CRT_OBJS): PRIVATE_CFLAGS := $(LOCAL_CFLAGS) $(addprefix -I,$(intermediates) $(LOCAL_C_INCLUDES)) -DCRT
  67 $(filter $(intermediates)/crt/$(MUSL_ARCH)/%.o,$(MUSL_CRT_OBJS)): $(intermediates)/%.o: $(LOCAL_PATH)/%.s
  68         $(TARGET_CC) $(PRIVATE_CFLAGS) -o $@ -c $< && ln -sf crt/$(MUSL_ARCH)/$(@F) $(@D)/../..
  69 $(filter-out $(intermediates)/crt/$(MUSL_ARCH)/%.o,$(MUSL_CRT_OBJS)): $(intermediates)/%.o: $(LOCAL_PATH)/%.c
  70         $(TARGET_CC) $(PRIVATE_CFLAGS) $(if $(filter %/crt1.c,$<),,-fPIC) -o $@ -c $< && ln -sf crt/$(@F) $(@D)/..
  71
  72 LOCAL_ADDITIONAL_DEPENDENCIES := $(MUSL_CRT_OBJS)
  73
  74 LOCAL_LDFLAGS := \
  75         -Wl,--sort-common \
  76         -Wl,--gc-sections \
  77         -Wl,--hash-style=both \
  78         -Wl,--no-undefined \
  79         -Wl,--exclude-libs=ALL \
  80         -Wl,--dynamic-list=$(LOCAL_PATH)/dynamic.list \
  81         -Wl,-e,_dlstart
  82
  83 LOCAL_POST_INSTALL_CMD := ln -sf $(LOCAL_MODULE).so $(MUSL_LIBC_SYS)/libc.so
  84
  85 include $(BUILD_SHARED_LIBRARY)
  86
  87 include $(CLEAR_VARS)
  88
  89 LOCAL_MODULE := musl-gcc
  90 LOCAL_MODULE_CLASS := EXECUTABLES
  91 LOCAL_IS_HOST_MODULE := true
  92
  93 intermediates := $(call local-generated-sources-dir)
  94 MUSL_GCC_SPECS := $(intermediates)/$(LOCAL_MODULE).specs
  95 LOCAL_PREBUILT_MODULE_FILE := $(basename $(MUSL_GCC_SPECS))
  96 LOCAL_GENERATED_SOURCES := $(LOCAL_PREBUILT_MODULE_FILE)
  97
  98 $(MUSL_GCC_SPECS): $(LOCAL_PATH)/tools/musl-gcc.specs.sh
  99         sh $< "$(MUSL_LIBC_SYS)" "$(MUSL_LIBC_SYS)" "$(subst $(PRODUCT_OUT),,$(MUSL_LDSO_PATHNAME))" > $@
 100
 101 $(LOCAL_PREBUILT_MODULE_FILE): $(MUSL_GCC_SPECS)
 102         echo -e "#!/bin/sh\ncd \$$(dirname \$$0)/../../../..\nexec $(TARGET_CC) \$$(cat $(MUSL_LIBC_SYS)/export_includes) -specs $(MUSL_GCC_SPECS) \"\$$@\"\n" > $@
 103
 104 MUSL_EMPTY_LIBS := $(MUSL_EMPTY_LIB_NAMES:%=$(MUSL_LIBC_SYS)/lib%.a)
 105 $(MUSL_EMPTY_LIBS):
 106         $(hide) rm -f $@; $(LLVM_PREBUILTS_PATH)/llvm-ar rc $@
 107
 108 LOCAL_ADDITIONAL_DEPENDENCIES := $(MUSL_EMPTY_LIBS)
 109
 110 include $(BUILD_PREBUILT)
 111
 112 MUSL_GCC := $(LOCAL_INSTALLED_MODULE)
 113
 114 include $(call all-makefiles-under,$(LOCAL_PATH))