lpc32xx: ea-lpc3250devkitv2: enable i2c (DM)

[platform/kernel/u-boot.git] / Makefile

diff --git a/Makefile b/Makefile
index 03f74ab..2ab9c53 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 VERSION = 2021
 PATCHLEVEL = 07
 SUBLEVEL =
-EXTRAVERSION = -rc2
+EXTRAVERSION =
 NAME =
 
 # *DOCUMENTATION*
@@ -676,6 +676,31 @@ else
 KBUILD_CFLAGS  += -O2
 endif
 
+LTO_CFLAGS :=
+LTO_FINAL_LDFLAGS :=
+export LTO_CFLAGS LTO_FINAL_LDFLAGS
+ifdef CONFIG_LTO
+       ifeq ($(cc-name),clang)
+               LTO_CFLAGS              += -flto
+               LTO_FINAL_LDFLAGS       += -flto
+
+               AR                      = $(shell $(CC) -print-prog-name=llvm-ar)
+               NM                      = $(shell $(CC) -print-prog-name=llvm-nm)
+       else
+               NPROC                   := $(shell nproc 2>/dev/null || echo 1)
+               LTO_CFLAGS              += -flto=$(NPROC)
+               LTO_FINAL_LDFLAGS       += -fuse-linker-plugin -flto=$(NPROC)
+
+               # use plugin aware tools
+               AR                      = $(CROSS_COMPILE)gcc-ar
+               NM                      = $(CROSS_COMPILE)gcc-nm
+       endif
+
+       CFLAGS_NON_EFI                  += $(LTO_CFLAGS)
+
+       KBUILD_CFLAGS                   += $(LTO_CFLAGS)
+endif
+
 ifeq ($(CONFIG_STACKPROTECTOR),y)
 KBUILD_CFLAGS += $(call cc-option,-fstack-protector-strong)
 CFLAGS_EFI += $(call cc-option,-fno-stack-protector)
@@ -972,6 +997,8 @@ LDFLAGS_u-boot += $(LDFLAGS_FINAL)
 # Avoid 'Not enough room for program headers' error on binutils 2.28 onwards.
 LDFLAGS_u-boot += $(call ld-option, --no-dynamic-linker)
 
+LDFLAGS_u-boot += --build-id=none
+
 ifeq ($(CONFIG_ARC)$(CONFIG_NIOS2)$(CONFIG_X86)$(CONFIG_XTENSA),)
 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
 endif
@@ -1708,8 +1735,45 @@ u-boot-swap.bin: u-boot.bin FORCE
 
 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(ARCH)/Makefile.postlink)
 
+# Generate linker list symbols references to force compiler to not optimize
+# them away when compiling with LTO
+ifdef CONFIG_LTO
+u-boot-keep-syms-lto := keep-syms-lto.o
+u-boot-keep-syms-lto_c := $(patsubst %.o,%.c,$(u-boot-keep-syms-lto))
+
+quiet_cmd_keep_syms_lto = KSL     $@
+      cmd_keep_syms_lto = \
+       NM=$(NM) $(srctree)/scripts/gen_ll_addressable_symbols.sh $^ >$@
+
+quiet_cmd_keep_syms_lto_cc = KSLCC   $@
+      cmd_keep_syms_lto_cc = \
+       $(CC) $(filter-out $(LTO_CFLAGS),$(c_flags)) -c -o $@ $<
+
+$(u-boot-keep-syms-lto_c): $(u-boot-main)
+       $(call if_changed,keep_syms_lto)
+$(u-boot-keep-syms-lto): $(u-boot-keep-syms-lto_c)
+       $(call if_changed,keep_syms_lto_cc)
+else
+u-boot-keep-syms-lto :=
+endif
+
 # Rule to link u-boot
 # May be overridden by arch/$(ARCH)/config.mk
+ifdef CONFIG_LTO
+quiet_cmd_u-boot__ ?= LTO     $@
+      cmd_u-boot__ ?=                                                          \
+               $(CC) -nostdlib -nostartfiles                                   \
+               $(LTO_FINAL_LDFLAGS) $(c_flags)                                 \
+               $(KBUILD_LDFLAGS:%=-Wl,%) $(LDFLAGS_u-boot:%=-Wl,%) -o $@       \
+               -T u-boot.lds $(u-boot-init)                                    \
+               -Wl,--whole-archive                                             \
+                       $(u-boot-main)                                          \
+                       $(u-boot-keep-syms-lto)                                 \
+                       $(PLATFORM_LIBS)                                        \
+               -Wl,--no-whole-archive                                          \
+               -Wl,-Map,u-boot.map;                                            \
+               $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
+else
 quiet_cmd_u-boot__ ?= LD      $@
       cmd_u-boot__ ?= $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_u-boot) -o $@          \
                -T u-boot.lds $(u-boot-init)                                    \
@@ -1718,6 +1782,7 @@ quiet_cmd_u-boot__ ?= LD      $@
                --no-whole-archive                                              \
                $(PLATFORM_LIBS) -Map u-boot.map;                               \
                $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
+endif
 
 quiet_cmd_smap = GEN     common/system_map.o
 cmd_smap = \
@@ -1726,7 +1791,7 @@ cmd_smap = \
        $(CC) $(c_flags) -DSYSTEM_MAP="\"$${smap}\"" \
                -c $(srctree)/common/system_map.c -o common/system_map.o
 
-u-boot:        $(u-boot-init) $(u-boot-main) u-boot.lds FORCE
+u-boot:        $(u-boot-init) $(u-boot-main) $(u-boot-keep-syms-lto) u-boot.lds FORCE
        +$(call if_changed,u-boot__)
 ifeq ($(CONFIG_KALLSYMS),y)
        $(call cmd,smap)
@@ -2009,7 +2074,7 @@ CLEAN_FILES += include/bmp_logo.h include/bmp_logo_data.h tools/version.h \
               boot* u-boot* MLO* SPL System.map fit-dtb.blob* \
               u-boot-ivt.img.log u-boot-dtb.imx.log SPL.log u-boot.imx.log \
               lpc32xx-* bl31.c bl31.elf bl31_*.bin image.map tispl.bin* \
-              idbloader.img flash.bin flash.log defconfig
+              idbloader.img flash.bin flash.log defconfig keep-syms-lto.c
 
 # Directories & files removed with 'make mrproper'
 MRPROPER_DIRS  += include/config include/generated spl tpl \
@@ -2214,7 +2279,7 @@ endif
        $(build)=$(build-dir) $(@:.ko=.o)
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 
-quiet_cmd_genenv = GENENV $@
+quiet_cmd_genenv = GENENV  $@
 cmd_genenv = $(OBJCOPY) --dump-section .rodata.default_environment=$@ env/common.o; \
        sed --in-place -e 's/\x00/\x0A/g' $@