X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=Makefile;h=26307fd4a65648be2a291056a369efa9f6b7fbd4;hb=7787330200526023f49b4d60869a1c91e908132a;hp=fa687f13a588cea01afc1edc69db3c72742f7f6f;hpb=dde1b75e9526d887a9aba9d4b30eb62ad2f22013;p=oweals%2Fu-boot.git

diff --git a/Makefile b/Makefile
index fa687f13a5..26307fd4a6 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 VERSION = 2020
 PATCHLEVEL = 04
 SUBLEVEL =
-EXTRAVERSION = -rc3
+EXTRAVERSION =
 NAME =
 
 # *DOCUMENTATION*
@@ -271,11 +271,17 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 	  else if [ -x /bin/bash ]; then echo /bin/bash; \
 	  else echo sh; fi ; fi)
 
+HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
+HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
+HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
+
 HOSTCC       = cc
 HOSTCXX      = c++
-HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
-		$(if $(CONFIG_TOOLS_DEBUG),-g)
-HOSTCXXFLAGS = -O2
+KBUILD_HOSTCFLAGS   := -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
+		$(if $(CONFIG_TOOLS_DEBUG),-g) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
+KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
+KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
+KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
 
 # With the move to GCC 6, we have implicitly upgraded our language
 # standard to GNU11 (see https://gcc.gnu.org/gcc-5/porting_to.html).
@@ -284,11 +290,11 @@ HOSTCXXFLAGS = -O2
 # these that our host tools are GNU11 (i.e. C11 w/ GNU extensions).
 CSTD_FLAG := -std=gnu11
 ifeq ($(HOSTOS),linux)
-HOSTCFLAGS += $(CSTD_FLAG)
+KBUILD_HOSTCFLAGS += $(CSTD_FLAG)
 endif
 
 ifeq ($(HOSTOS),cygwin)
-HOSTCFLAGS	+= -ansi
+KBUILD_HOSTCFLAGS	+= -ansi
 endif
 
 # Mac OS X / Darwin's C preprocessor is Apple specific.  It
@@ -315,17 +321,17 @@ os_x_after = $(shell if [ $(DARWIN_MAJOR_VERSION) -ge $(1) -a \
 
 # Snow Leopards build environment has no longer restrictions as described above
 HOSTCC       = $(call os_x_before, 10, 5, "cc", "gcc")
-HOSTCFLAGS  += $(call os_x_before, 10, 4, "-traditional-cpp")
-HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
+KBUILD_HOSTCFLAGS  += $(call os_x_before, 10, 4, "-traditional-cpp")
+KBUILD_HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
 
 # since Lion (10.7) ASLR is on by default, but we use linker generated lists
 # in some host tools which is a problem then ... so disable ASLR for these
 # tools
-HOSTLDFLAGS += $(call os_x_before, 10, 7, "", "-Xlinker -no_pie")
+KBUILD_HOSTLDFLAGS += $(call os_x_before, 10, 7, "", "-Xlinker -no_pie")
 
 # macOS Mojave (10.14.X) 
 # Undefined symbols for architecture x86_64: "_PyArg_ParseTuple"
-HOSTLDFLAGS += $(call os_x_after, 10, 14, "-lpython -dynamclib", "")
+KBUILD_HOSTLDFLAGS += $(call os_x_after, 10, 14, "-lpython -dynamclib", "")
 endif
 
 # Decide whether to build built-in, modular, or both.
@@ -417,6 +423,23 @@ KBUILD_CFLAGS   := -Wall -Wstrict-prototypes \
 		   -fno-builtin -ffreestanding $(CSTD_FLAG)
 KBUILD_CFLAGS	+= -fshort-wchar -fno-strict-aliasing
 KBUILD_AFLAGS   := -D__ASSEMBLY__
+KBUILD_LDFLAGS  :=
+
+ifeq ($(cc-name),clang)
+ifneq ($(CROSS_COMPILE),)
+CLANG_TARGET	:= --target=$(notdir $(CROSS_COMPILE:%-=%))
+GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD)))
+CLANG_PREFIX	:= --prefix=$(GCC_TOOLCHAIN_DIR)
+GCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
+endif
+ifneq ($(GCC_TOOLCHAIN),)
+CLANG_GCC_TC	:= --gcc-toolchain=$(GCC_TOOLCHAIN)
+endif
+KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
+KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
+KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
+KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
+endif
 
 # Don't generate position independent code
 KBUILD_CFLAGS	+= $(call cc-option,-fno-PIE)
@@ -428,14 +451,16 @@ UBOOTVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SU
 
 export VERSION PATCHLEVEL SUBLEVEL UBOOTRELEASE UBOOTVERSION
 export ARCH CPU BOARD VENDOR SOC CPUDIR BOARDDIR
-export CONFIG_SHELL HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE AS LD CC
-export CPP AR NM LDR STRIP OBJCOPY OBJDUMP
+export CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
+export CPP AR NM LDR STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
 export MAKE LEX YACC AWK PERL PYTHON PYTHON2 PYTHON3
-export HOSTCXX HOSTCXXFLAGS CHECK CHECKFLAGS DTC DTC_FLAGS
+export HOSTCXX KBUILD_HOSTCXXFLAGS CHECK CHECKFLAGS DTC DTC_FLAGS
 
-export KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE OBJCOPYFLAGS LDFLAGS
+export KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
 export KBUILD_CFLAGS KBUILD_AFLAGS
 
+export CC_VERSION_TEXT := $(shell $(CC) --version | head -n 1)
+
 # When compiling out-of-tree modules, put MODVERDIR in the module
 # tree rather than in the kernel tree. The kernel tree might
 # even be read-only.
@@ -483,6 +508,7 @@ endif
 version_h := include/generated/version_autogenerated.h
 timestamp_h := include/generated/timestamp_autogenerated.h
 defaultenv_h := include/generated/defaultenv_autogenerated.h
+dt_h := include/generated/dt.h
 
 no-dot-config-targets := clean clobber mrproper distclean \
 			 help %docs check% coccicheck \
@@ -654,6 +680,9 @@ endif
 KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks)
 
+# disable stringop warnings in gcc 8+
+KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
+
 # change __FILE__ to the relative path from the srctree
 KBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
 
@@ -678,7 +707,19 @@ ifeq ($(cc-name),clang)
 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
+KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
+# Quiet clang warning: comparison of unsigned expression < 0 is always false
+KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
+# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
+# source of a reference will be _MergedGlobals and not on of the whitelisted names.
+# See modpost pattern 2
+KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
+else
+
+# These warnings generated too much noise in a regular build.
+# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
 endif
 
 # turn jbsr into jsr for m68k
@@ -710,7 +751,6 @@ UBOOTINCLUDE    := \
 		-include $(srctree)/include/linux/kconfig.h
 
 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
-CHECKFLAGS     += $(NOSTDINC_FLAGS)
 
 # FIX ME
 cpp_flags := $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) $(UBOOTINCLUDE) \
@@ -924,6 +964,12 @@ ifeq ($(CONFIG_ARC)$(CONFIG_NIOS2)$(CONFIG_X86)$(CONFIG_XTENSA),)
 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
 endif
 
+# insure the checker run with the right endianness
+CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
+
+# the checker needs the correct machine size
+CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
+
 # Normally we fill empty space with 0xff
 quiet_cmd_objcopy = OBJCOPY $@
 cmd_objcopy = $(OBJCOPY) --gap-fill=0xff $(OBJCOPYFLAGS) \
@@ -1647,18 +1693,17 @@ OBJCOPYFLAGS_u-boot-img-spl-at-end.bin := -I binary -O binary \
 u-boot-img-spl-at-end.bin: u-boot.img spl/u-boot-spl.bin FORCE
 	$(call if_changed,pad_cat)
 
-# Create a new ELF from a raw binary file.
-ifndef PLATFORM_ELFENTRY
-  PLATFORM_ELFENTRY = "_start"
-endif
 quiet_cmd_u-boot-elf ?= LD      $@
 	cmd_u-boot-elf ?= $(LD) u-boot-elf.o -o $@ \
-	--defsym=$(PLATFORM_ELFENTRY)=$(CONFIG_SYS_TEXT_BASE) \
+	-T u-boot-elf.lds --defsym=$(CONFIG_PLATFORM_ELFENTRY)=$(CONFIG_SYS_TEXT_BASE) \
 	-Ttext=$(CONFIG_SYS_TEXT_BASE)
-u-boot.elf: u-boot.bin
+u-boot.elf: u-boot.bin u-boot-elf.lds
 	$(Q)$(OBJCOPY) -I binary $(PLATFORM_ELFFLAGS) $< u-boot-elf.o
 	$(call if_changed,u-boot-elf)
 
+u-boot-elf.lds: arch/u-boot-elf.lds prepare FORCE
+	$(call if_changed_dep,cpp_lds)
+
 # MediaTek's ARM-based u-boot needs a header to contains its load address
 # which is parsed by the BootROM.
 # If the SPL build is enabled, the header will be added to the spl binary,
@@ -1684,7 +1729,7 @@ ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(ARCH)/Makefile.postlink)
 # Rule to link u-boot
 # May be overridden by arch/$(ARCH)/config.mk
 quiet_cmd_u-boot__ ?= LD      $@
-      cmd_u-boot__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_u-boot) -o $@ \
+      cmd_u-boot__ ?= $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_u-boot) -o $@ \
       -T u-boot.lds $(u-boot-init)                             \
       --start-group $(u-boot-main) --end-group                 \
       $(PLATFORM_LIBS) -Map u-boot.map;                        \
@@ -1768,7 +1813,7 @@ endif
 # prepare2 creates a makefile if using a separate output directory
 prepare2: prepare3 outputmakefile cfg
 
-prepare1: prepare2 $(version_h) $(timestamp_h) \
+prepare1: prepare2 $(version_h) $(timestamp_h) $(dt_h) \
                    include/config/auto.conf
 ifeq ($(wildcard $(LDSCRIPT)),)
 	@echo >&2 "  Could not find linker script."
@@ -1834,12 +1879,23 @@ define filechk_defaultenv.h
 	 xxd -i ; echo ", 0x00" ; )
 endef
 
+define filechk_dt.h
+	(if test -n "$${DEVICE_TREE}"; then \
+		echo \#define DEVICE_TREE \"$(DEVICE_TREE)\"; \
+	else \
+		echo \#define DEVICE_TREE CONFIG_DEFAULT_DEVICE_TREE; \
+	fi)
+endef
+
 $(version_h): include/config/uboot.release FORCE
 	$(call filechk,version.h)
 
 $(timestamp_h): $(srctree)/Makefile FORCE
 	$(call filechk,timestamp.h)
 
+$(dt_h): $(srctree)/Makefile FORCE
+	$(call filechk,dt.h)
+
 $(defaultenv_h): $(CONFIG_DEFAULT_ENV_FILE:"%"=%) FORCE
 	$(call filechk,defaultenv.h)
 
@@ -2196,6 +2252,6 @@ endif	# skip-makefile
 PHONY += FORCE
 FORCE:
 
-# Declare the contents of the .PHONY variable as phony.  We keep that
+# Declare the contents of the PHONY variable as phony.  We keep that
 # information in a variable so we can use it in if_changed and friends.
 .PHONY: $(PHONY)