Masahiro Yamada d6ac46c7db kbuild: add .DELETE_ON_ERROR special target ... [ Upstream commit 9c2af1c737 ] If Make gets a fatal signal while a shell is executing, it may delete the target file that the recipe was supposed to update. This is needed to make sure that it is remade from scratch when Make is next run; if Make is interrupted after the recipe has begun to write the target file, it results in an incomplete file whose time stamp is newer than that of the prerequisites files. Make automatically deletes the incomplete file on interrupt unless the target is marked .PRECIOUS. The situation is just the same as when the shell fails for some reasons. Usually when a recipe line fails, if it has changed the target file at all, the file is corrupted, or at least it is not completely updated. Yet the file’s time stamp says that it is now up to date, so the next time Make runs, it will not try to update that file. However, Make does not cater to delete the incomplete target file in this case. We need to add .DELETE_ON_ERROR somewhere in the Makefile to request it. scripts/Kbuild.include seems a suitable place to add it because it is included from almost all sub-makes. Please note .DELETE_ON_ERROR is not effective for phony targets. The external module building should never ever touch the kernel tree. The following recipe fails if include/generated/autoconf.h is missing. However, include/config/auto.conf is not deleted since it is a phony target. PHONY += include/config/auto.conf include/config/auto.conf: $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ echo >&2; \ echo >&2 " ERROR: Kernel configuration is invalid."; \ echo >&2 " include/generated/autoconf.h or $@ are missing.";\ echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo >&2 ; \ /bin/false) Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-26 08:35:05 +02:00
..
basic
coccinelle
dtc
gdb
genksyms
kconfig	kconfig: Avoid format overflow warning from GCC 8.1	2018-06-13 16:15:27 +02:00
ksymoops
mod	scripts: modpost: check memory allocation results	2018-09-15 09:40:38 +02:00
package
selinux
tracing
.gitignore
analyze_suspend.py
asn1_compiler.c
bloat-o-meter
bootgraph.pl
check_extable.sh
check-lc_ctype.c
checkincludes.pl
checkkconfigsymbols.py
checkpatch.pl
checkstack.pl
checksyscalls.sh
checkversion.pl
cleanfile
cleanpatch
coccicheck
config
conmakehash.c
decode_stacktrace.sh
decodecode
depmod.sh	kbuild: make missing $DEPMOD a Warning instead of an Error	2018-09-15 09:40:40 +02:00
diffconfig
docproc.c
export_report.pl
extract-cert.c
extract-ikconfig
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
gcc-goto.sh
gcc-ld
gcc-version.sh
gcc-x86_32-has-stack-protector.sh
gcc-x86_64-has-stack-protector.sh
gen_initramfs_list.sh
get_maintainer.pl
gfp-translate
headerdep.pl
headers_check.pl
headers_install.sh
headers.sh
kallsyms.c
Kbuild.include	kbuild: add .DELETE_ON_ERROR special target	2018-09-26 08:35:05 +02:00
kernel-doc
kernel-doc-xml-ref
ld-version.sh
Lindent
link-vmlinux.sh
Makefile
Makefile.asm-generic
Makefile.build
Makefile.clean
Makefile.dtbinst
Makefile.extrawarn
Makefile.fwinst
Makefile.headersinst
Makefile.help
Makefile.host
Makefile.kasan	kasan: don't emit builtin calls when sanitization is off	2018-08-17 20:56:44 +02:00
Makefile.lib	kasan: don't emit builtin calls when sanitization is off	2018-08-17 20:56:44 +02:00
Makefile.modbuiltin
Makefile.modinst
Makefile.modpost
Makefile.modsign
makelst
markup_oops.pl
mkcompile_h
mkmakefile
mksysmap
mkuboot.sh
mkversion
module-common.lds
namespace.pl
objdiff
patch-kernel
pnmtologo.c
profile2linkerlist.pl
recordmcount.c
recordmcount.h
recordmcount.pl
setlocalversion
show_delta
sign-file.c
sortextable.c
sortextable.h
spelling.txt
stackdelta
stackusage
tags.sh
unifdef.c
ver_linux
xen-hypercalls.sh
xz_wrap.sh