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Commit e965b8ce authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 

Pull kbuild updates from Michal Marek:
 "Just a few kbuild core commits this time:

   - kallsyms fix for CONFIG_XIP_KERNEL

   - bashisms in scripts/link-vmlinux.sh fixed

   - workaround to make DEBUG_INFO_REDUCED more useful yet still space
     efficient

   - clang is not wrongly detected when cross-compiling"

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kbuild: include core debug info when DEBUG_INFO_REDUCED
  scripts: link-vmlinux: Don't pass page offset to kallsyms if XIP Kernel
  scripts: fix link-vmlinux.sh bash-ism
  Makefile: Fix detection of clang when cross-compiling
parents a95cb3cd 50ab9a69

Makefile

+7 −9
Original line number Diff line number Diff line
@@ -335,15 +335,6 @@ endif 
export KBUILD_MODULES KBUILD_BUILTIN

export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD



ifneq ($(CC),)

ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)

COMPILER := clang

else

COMPILER := gcc

endif

export COMPILER

endif



# We need some generic definitions (do not try to remake the file).

scripts/Kbuild.include: ;

include scripts/Kbuild.include
@@ -670,6 +661,13 @@ endif 
endif

KBUILD_CFLAGS += $(stackp-flag)



ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)

COMPILER := clang

else

COMPILER := gcc

endif

export COMPILER



ifeq ($(COMPILER),clang)

KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)

KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)

lib/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -45,6 +45,9 @@ CFLAGS_kobject.o += -DDEBUG 
CFLAGS_kobject_uevent.o += -DDEBUG

endif



obj-$(CONFIG_DEBUG_INFO_REDUCED) += debug_info.o

CFLAGS_debug_info.o += $(call cc-option, -femit-struct-debug-detailed=any)



obj-$(CONFIG_GENERIC_IOMAP) += iomap.o

obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o

obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o

lib/debug_info.c

0 → 100644
+27 −0
Original line number Diff line number Diff line 
/*

 * This file exists solely to ensure debug information for some core

 * data structures is included in the final image even for

 * CONFIG_DEBUG_INFO_REDUCED. Please do not add actual code. However,

 * adding appropriate #includes is fine.

 */

#include <stdarg.h>



#include <linux/cred.h>

#include <linux/crypto.h>

#include <linux/dcache.h>

#include <linux/device.h>

#include <linux/fs.h>

#include <linux/fscache-cache.h>

#include <linux/io.h>

#include <linux/kallsyms.h>

#include <linux/kernel.h>

#include <linux/kobject.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/net.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/types.h>

#include <net/addrconf.h>

#include <net/sock.h>

#include <net/tcp.h>

scripts/link-vmlinux.sh

+15 −3
Original line number Diff line number Diff line
@@ -82,7 +82,7 @@ kallsyms() 
		kallsymopt="${kallsymopt} --all-symbols"

	fi



	if [ -n "${CONFIG_ARM}" ] && [ -n "${CONFIG_PAGE_OFFSET}" ]; then

	if [ -n "${CONFIG_ARM}" ] && [ -z "${CONFIG_XIP_KERNEL}" ] && [ -n "${CONFIG_PAGE_OFFSET}" ]; then

		kallsymopt="${kallsymopt} --page-offset=$CONFIG_PAGE_OFFSET"

	fi
@@ -111,7 +111,6 @@ sortextable() 
}



# Delete output files in case of error

trap cleanup SIGHUP SIGINT SIGQUIT SIGTERM ERR

cleanup()

{

	rm -f .old_version
@@ -124,6 +123,20 @@ cleanup() 
	rm -f vmlinux.o

}



on_exit()

{

	if [ $? -ne 0 ]; then

		cleanup

	fi

}

trap on_exit EXIT



on_signals()

{

	exit 1

}

trap on_signals HUP INT QUIT TERM



#

#

# Use "make V=1" to debug this script
@@ -231,7 +244,6 @@ if [ -n "${CONFIG_KALLSYMS}" ]; then 
	if ! cmp -s System.map .tmp_System.map; then

		echo >&2 Inconsistent kallsyms data

		echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround

		cleanup

		exit 1

	fi

fi