KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
&& /bin/pwd)
$(if $(KBUILD_OUTPUT),, \
- $(error output directory "$(saved-output)" does not exist))
+ $(error failed to create output directory "$(saved-output)"))
PHONY += $(MAKECMDGOALS) sub-make
else echo sh; fi ; fi)
HOSTCC = gcc
+HOSTCXX = g++
HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCXXFLAGS = -O2
+
+ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
+HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
+ -Wno-missing-field-initializers -fno-delete-null-pointer-checks
+endif
ifeq ($(HOSTOS),cygwin)
HOSTCFLAGS += -ansi
# If the user is running make -s (silent mode), suppress echoing of
# commands
+ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
+ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
+ quiet=silent_
+endif
+else # make-3.8x
ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
quiet=silent_
endif
+endif
export quiet Q KBUILD_VERBOSE
+ifneq ($(CC),)
+ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
+COMPILER := clang
+else
+COMPILER := gcc
+endif
+export COMPILER
+endif
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(srctree)
# Files to ignore in find ... statements
-RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
- -o -name .pc -o -name .hg -o -name .git \) -prune -o
+export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
+ -name CVS -o -name .pc -o -name .hg -o -name .git \) \
+ -prune -o
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
--exclude CVS --exclude .pc --exclude .hg --exclude .git
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
+ifeq ($(COMPILER),clang)
+KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
+KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
+KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
+KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
+# 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,)
+endif
+
KBUILD_CFLAGS += -g
# $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
# option to the assembler.
CLOBBER_FILES += u-boot* MLO* SPL System.map nand_spl/u-boot*
# Directories & files removed with 'make mrproper'
-MRPROPER_DIRS += include/config include/generated
+MRPROPER_DIRS += include/config include/generated \
+ .tmp_objdiff
MRPROPER_FILES += .config .config.old \
tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
include/config.h include/config.mk
@find $(srctree) $(RCS_FIND_IGNORE) \
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
- -o -name '.*.rej' -o -name '*.pyc' \
- -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
+ -o -name '.*.rej' -o -name '*%' -o -name 'core' \
+ -o -name '*.pyc' \) \
-type f -print | xargs rm -f
backup:
# Convenient variables
comma := ,
+quote := "
squote := '
empty :=
space := $(empty) $(empty)
# Important: no spaces around options
ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
+# ld-version
+# Usage: $(call ld-version)
+# Note this is mainly for HJ Lu's 3 number binutil versions
+ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
+
+# ld-ifversion
+# Usage: $(call ld-ifversion, -ge, 22252, y)
+ld-ifversion = $(shell [ $(call ld-version) $(1) $(2) ] && echo $(3))
+
######
###
# These targets are used internally to avoid "is up to date" messages
PHONY += build_docproc
-build_docproc: scripts/docproc
+build_docproc: $(obj)/docproc
@:
# Let clean descend into subdirs
warning-1 := -Wextra -Wunused -Wno-unused-parameter
warning-1 += -Wmissing-declarations
warning-1 += -Wmissing-format-attribute
-warning-1 += -Wmissing-prototypes
+warning-1 += $(call cc-option, -Wmissing-prototypes)
warning-1 += -Wold-style-definition
warning-1 += $(call cc-option, -Wmissing-include-dirs)
warning-1 += $(call cc-option, -Wunused-but-set-variable)
warning-1 += $(call cc-disable-warning, missing-field-initializers)
+# Clang
+warning-1 += $(call cc-disable-warning, initializer-overrides)
+warning-1 += $(call cc-disable-warning, unused-value)
+warning-1 += $(call cc-disable-warning, format)
+warning-1 += $(call cc-disable-warning, unknown-warning-option)
+warning-1 += $(call cc-disable-warning, sign-compare)
+warning-1 += $(call cc-disable-warning, format-zero-length)
+warning-1 += $(call cc-disable-warning, uninitialized)
+warning-1 += $(call cc-option, -fcatch-undefined-behavior)
+
warning-2 := -Waggregate-return
warning-2 += -Wcast-align
warning-2 += -Wdisabled-optimization
$(multi-objs-y:.o=.lst) : modname = $(modname-multi)
quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
-cmd_cc_s_c = $(CC) $(c_flags) -fverbose-asm -S -o $@ $<
+cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
$(obj)/%.s: $(src)/%.c FORCE
$(call if_changed_dep,cc_s_c)
dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
+# Helper targets for Installing DTBs into the boot directory
+quiet_cmd_dtb_install = INSTALL $<
+ cmd_dtb_install = cp $< $(2)
+
+_dtbinst_pre_:
+ $(Q)if [ -d $(INSTALL_DTBS_PATH).old ]; then rm -rf $(INSTALL_DTBS_PATH).old; fi
+ $(Q)if [ -d $(INSTALL_DTBS_PATH) ]; then mv $(INSTALL_DTBS_PATH) $(INSTALL_DTBS_PATH).old; fi
+ $(Q)mkdir -p $(INSTALL_DTBS_PATH)
+
+%.dtb_dtbinst_: $(obj)/%.dtb _dtbinst_pre_
+ $(call cmd,dtb_install,$(INSTALL_DTBS_PATH))
+
# Bzip2
# ---------------------------------------------------------------------------
cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
(rm -f $@ ; false)
-
-# misc stuff
-# ---------------------------------------------------------------------------
-quote:="
--- /dev/null
+#!/usr/bin/awk -f
+# extract linker version number from stdin and turn into single number
+ {
+ gsub(".*)", "");
+ split($1,a, ".");
+ print a[1]*10000000 + a[2]*100000 + a[3]*10000 + a[4]*100 + a[5];
+ exit
+ }
--- /dev/null
+#!/bin/bash
+
+# objdiff - a small script for validating that a commit or series of commits
+# didn't change object code.
+#
+# Copyright 2014, Jason Cooper <jason@lakedaemon.net>
+#
+# Licensed under the terms of the GNU GPL version 2
+
+# usage example:
+#
+# $ git checkout COMMIT_A
+# $ <your fancy build command here>
+# $ ./scripts/objdiff record path/to/*.o
+#
+# $ git checkout COMMIT_B
+# $ <your fancy build command here>
+# $ ./scripts/objdiff record path/to/*.o
+#
+# $ ./scripts/objdiff diff COMMIT_A COMMIT_B
+# $
+
+# And to clean up (everything is in .tmp_objdiff/*)
+# $ ./scripts/objdiff clean all
+#
+# Note: 'make mrproper' will also remove .tmp_objdiff
+
+GIT_DIR="`git rev-parse --git-dir`"
+
+if [ -d "$GIT_DIR" ]; then
+ TMPD="${GIT_DIR%git}tmp_objdiff"
+
+ [ -d "$TMPD" ] || mkdir "$TMPD"
+else
+ echo "ERROR: git directory not found."
+ exit 1
+fi
+
+usage() {
+ echo "Usage: $0 <command> <args>"
+ echo " record <list of object files>"
+ echo " diff <commitA> <commitB>"
+ echo " clean all | <commit>"
+ exit 1
+}
+
+dorecord() {
+ [ $# -eq 0 ] && usage
+
+ FILES="$*"
+
+ CMT="`git rev-parse --short HEAD`"
+
+ OBJDUMP="${CROSS_COMPILE}objdump"
+ OBJDIFFD="$TMPD/$CMT"
+
+ [ ! -d "$OBJDIFFD" ] && mkdir -p "$OBJDIFFD"
+
+ for f in $FILES; do
+ dn="${f%/*}"
+ bn="${f##*/}"
+
+ [ ! -d "$OBJDIFFD/$dn" ] && mkdir -p "$OBJDIFFD/$dn"
+
+ # remove addresses for a more clear diff
+ # http://dummdida.tumblr.com/post/60924060451/binary-diff-between-libc-from-scientificlinux-and
+ $OBJDUMP -D "$f" | sed "s/^[[:space:]]\+[0-9a-f]\+//" \
+ >"$OBJDIFFD/$dn/$bn"
+ done
+}
+
+dodiff() {
+ [ $# -ne 2 ] && [ $# -ne 0 ] && usage
+
+ if [ $# -eq 0 ]; then
+ SRC="`git rev-parse --short HEAD^`"
+ DST="`git rev-parse --short HEAD`"
+ else
+ SRC="`git rev-parse --short $1`"
+ DST="`git rev-parse --short $2`"
+ fi
+
+ DIFF="`which colordiff`"
+
+ if [ ${#DIFF} -eq 0 ] || [ ! -x "$DIFF" ]; then
+ DIFF="`which diff`"
+ fi
+
+ SRCD="$TMPD/$SRC"
+ DSTD="$TMPD/$DST"
+
+ if [ ! -d "$SRCD" ]; then
+ echo "ERROR: $SRCD doesn't exist"
+ exit 1
+ fi
+
+ if [ ! -d "$DSTD" ]; then
+ echo "ERROR: $DSTD doesn't exist"
+ exit 1
+ fi
+
+ $DIFF -Nurd $SRCD $DSTD
+}
+
+doclean() {
+ [ $# -eq 0 ] && usage
+ [ $# -gt 1 ] && usage
+
+ if [ "x$1" = "xall" ]; then
+ rm -rf $TMPD/*
+ else
+ CMT="`git rev-parse --short $1`"
+
+ if [ -d "$TMPD/$CMT" ]; then
+ rm -rf $TMPD/$CMT
+ else
+ echo "$CMT not found"
+ fi
+ fi
+}
+
+[ $# -eq 0 ] && usage
+
+case "$1" in
+ record)
+ shift
+ dorecord $*
+ ;;
+ diff)
+ shift
+ dodiff $*
+ ;;
+ clean)
+ shift
+ doclean $*
+ ;;
+ *)
+ echo "Unrecognized command '$1'"
+ exit 1
+ ;;
+esac
projects / u-boot / commitdiff