diff options
Diffstat (limited to 'Makefile.toolchain')
| -rw-r--r-- | Makefile.toolchain | 57 |
1 files changed, 50 insertions, 7 deletions
diff --git a/Makefile.toolchain b/Makefile.toolchain index c2e952d43b..e26bf2c8a2 100644 --- a/Makefile.toolchain +++ b/Makefile.toolchain @@ -1,5 +1,5 @@ # -*- makefile -*- -# Copyright 2012 The Chromium OS Authors. All rights reserved. +# Copyright 2012 The ChromiumOS Authors # Use of this source code is governed by a BSD-style license that can be # found in the LICENSE file. # @@ -23,8 +23,25 @@ ifneq ($(TEST_FUZZ)$(TEST_ASAN)$(TEST_MSAN)$(TEST_UBSAN),) CC=clang endif +# When set to 1, use the subset of the C standard library implemented in EC +# (the "builtin" directory). +# When set to 0, link against the toolchain's implementation of the C standard +# library. +USE_BUILTIN_STDLIB:=1 + +# Set the prefix for the compiler if specified (e.g., "x86_64-pc-linux-gnu-"). +ifeq ($(origin BUILDCC_PREFIX),undefined) +# If building with Portage use the environment variable it provides. +# https://wiki.gentoo.org/wiki/Embedded_Handbook/General/Introduction#Environment_variables +ifneq ($(CBUILD),) +BUILDCC_PREFIX:=$(CBUILD)- +else +BUILDCC_PREFIX:=x86_64-pc-linux-gnu- +endif +endif + # Extract cc-name -cc-name:=$(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc) +cc-name:=$(shell $(BUILDCC_PREFIX)$(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc) # Assume we want to use same compiler for both C and C++ ifeq ($(cc-name),gcc) @@ -36,8 +53,14 @@ endif # Try not to assume too much about optional tools and prefixes CCACHE:=$(shell which ccache 2>/dev/null) ifeq ($(origin HOST_CROSS_COMPILE),undefined) +# If building with Portage use the environment variable it provides. +# https://wiki.gentoo.org/wiki/Embedded_Handbook/General/Introduction#Environment_variables +ifneq ($(CHOST),) +HOST_CROSS_COMPILE:=$(CHOST)- +else HOST_CROSS_COMPILE:=$(if $(shell which x86_64-pc-linux-gnu-$(cc-name) 2>/dev/null),x86_64-pc-linux-gnu-,) endif +endif AR=$(CROSS_COMPILE)ar CC=$(CCACHE) $(CROSS_COMPILE)$(cc-name) @@ -49,13 +72,17 @@ OBJCOPY=$(CROSS_COMPILE)objcopy OBJDUMP=$(CROSS_COMPILE)objdump ADDR2LINE=$(CROSS_COMPILE)addr2line PKG_CONFIG?=pkg-config -BUILDCC?=$(CCACHE) $(cc-name) +BUILDCC?=$(CCACHE) $(BUILDCC_PREFIX)$(cc-name) HOSTCC?=$(CCACHE) $(HOST_CROSS_COMPILE)$(cc-name) HOSTCXX?=$(CCACHE) $(HOST_CROSS_COMPILE)clang++ HOST_PKG_CONFIG?=$(HOST_CROSS_COMPILE)pkg-config PROTOC?=protoc GCOV=$(CROSS_COMPILE)gcov +ifeq ($(cc-name),gcc) +HOSTGCOV=$(HOST_CROSS_COMPILE)gcov +else HOSTGCOV=$(CURDIR)/util/llvm-gcov.sh +endif C_WARN = -Wstrict-prototypes -Wdeclaration-after-statement -Wno-pointer-sign COMMON_WARN = -Wall -Wundef -Werror-implicit-function-declaration \ @@ -89,7 +116,7 @@ CFLAGS_WARN = $(COMMON_WARN) $(C_WARN) CXXFLAGS_WARN = $(COMMON_WARN) CFLAGS_DEBUG= -g CFLAGS_DEBUG+=$(CFLAGS_DEBUG_CHIP) -CFLAGS_INCLUDE=$(foreach i,$(includes),-I$(i) ) -I. +CFLAGS_INCLUDE=$(foreach i,$(filter-out builtin, $(includes)),-I$(i) ) -I. CFLAGS_TEST=$(if $(TEST_BUILD),-DTEST_BUILD=$(EMPTY) \ -DTEST_TASKFILE=$(PROJECT).tasklist,) \ $(if $(CTS_MODULE), $(CFLAGS_CTS)) \ @@ -98,7 +125,8 @@ CFLAGS_TEST=$(if $(TEST_BUILD),-DTEST_BUILD=$(EMPTY) \ $(if $(TEST_ASAN),-fsanitize=address) \ $(if $(TEST_MSAN),-fsanitize=memory) \ $(if $(TEST_UBSAN),$(UBSAN_FLAGS)) \ - $(if $(TEST_FUZZ),-fsanitize=fuzzer-no-link -DTEST_FUZZ=$(EMPTY)) + $(if $(TEST_FUZZ),-fsanitize=fuzzer-no-link -fno-PIE \ + -DTEST_FUZZ=$(EMPTY)) CFLAGS_COVERAGE=$(if $(TEST_COVERAGE),--coverage \ -DTEST_COVERAGE=$(EMPTY),) CFLAGS_HOSTTEST=$(if $(TEST_HOSTTEST),-DTEST_HOSTTEST=$(EMPTY),) -Iinclude/driver @@ -123,8 +151,11 @@ HOST_CPPFLAGS=$(CFLAGS_DEFINE) $(CFLAGS_INCLUDE) $(CFLAGS_TEST) \ $(EXTRA_CFLAGS) $(CFLAGS_COVERAGE) $(CFLAGS_HOSTTEST) $(LATE_CFLAGS_DEFINE) \ -DSECTION_IS_$(BLD)=$(EMPTY) -DSECTION=$(BLD) $(CPPFLAGS_$(BLD)) ifneq ($(BOARD),host) +CPPFLAGS+=-fno-PIC +ifeq ($(USE_BUILTIN_STDLIB), 1) CPPFLAGS+=-ffreestanding -fno-builtin -nostdinc -nostdlib CPPFLAGS+=-Ibuiltin/ +endif else CPPFLAGS+=-Og endif @@ -132,11 +163,15 @@ CPPFLAGS+= -DCHROMIUM_EC=$(EMPTY) CFLAGS=$(CPPFLAGS) $(CFLAGS_CPU) $(CFLAGS_DEBUG) $(COMMON_WARN) $(CFLAGS_y) CFLAGS+= -ffunction-sections -fshort-wchar CFLAGS+= -fno-delete-null-pointer-checks +CFLAGS+= -fno-PIC ifneq ($(cc-name),clang) CFLAGS+= -ffat-lto-objects CFLAGS+= -fconserve-stack endif CXXFLAGS+=-DPROTOBUF_INLINE_NOT_IN_HEADERS=0 +ifeq ($(USE_BUILTIN_STDLIB), 1) +CPPFLAGS+=-DUSE_BUILTIN_STDLIB +endif ifeq ($(LIBFTDI_NAME),) FTDIVERSION:=$(shell $(PKG_CONFIG) --modversion libftdi1 2>/dev/null) @@ -171,16 +206,24 @@ HOST_CXXFLAGS=$(HOST_CFLAGS) ifneq (${SYSROOT},) LDFLAGS_EXTRA+=--sysroot=${SYSROOT} endif -LDFLAGS=-nostdlib -g -Wl,-X -Wl,--gc-sections -Wl,--build-id=none \ +LDFLAGS=-g -no-pie -Wl,-X -Wl,--gc-sections -Wl,--build-id=none \ $(LDFLAGS_EXTRA) $(CFLAGS_CPU) +ifeq ($(USE_BUILTIN_STDLIB), 1) +LDFLAGS+=-nostdlib +else +LDFLAGS+=-lnosys +endif MEMSIZE_FLAGS= ifeq ($(cc-name),gcc) MEMSIZE_FLAGS+=-Wl,--print-memory-usage endif BUILD_LDFLAGS=$(LIBFTDIUSB_LDLIBS) HOST_LDFLAGS=$(LIBFTDIUSB_LDLIBS) +ifneq (${HOST_SYSROOT},) + HOST_LDFLAGS+=--sysroot=${HOST_SYSROOT} +endif HOST_TEST_LDFLAGS=-Wl,-T core/host/host_exe.lds -lrt -pthread -rdynamic -lm\ - -fuse-ld=bfd \ + -fuse-ld=bfd -no-pie \ $(if $(TEST_COVERAGE), --coverage,) \ $(if $(TEST_ASAN), -fsanitize=address) \ $(if $(TEST_MSAN), -fsanitize=memory) \ |