Merge tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy...

Pull Kbuild updates from Masahiro Yamada:

 - Support 'make compile_commands.json' to generate the compilation
   database more easily, avoiding stale entries

 - Support 'make clang-analyzer' and 'make clang-tidy' for static checks
   using clang-tidy

 - Preprocess scripts/modules.lds.S to allow CONFIG options in the
   module linker script

 - Drop cc-option tests from compiler flags supported by our minimal
   GCC/Clang versions

 - Use always 12-digits commit hash for CONFIG_LOCALVERSION_AUTO=y

 - Use sha1 build id for both BFD linker and LLD

 - Improve deb-pkg for reproducible builds and rootless builds

 - Remove stale, useless scripts/namespace.pl

 - Turn -Wreturn-type warning into error

 - Fix build error of deb-pkg when CONFIG_MODULES=n

 - Replace 'hostname' command with more portable 'uname -n'

 - Various Makefile cleanups

* tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
  kbuild: Use uname for LINUX_COMPILE_HOST detection
  kbuild: Only add -fno-var-tracking-assignments for old GCC versions
  kbuild: remove leftover comment for filechk utility
  treewide: remove DISABLE_LTO
  kbuild: deb-pkg: clean up package name variables
  kbuild: deb-pkg: do not build linux-headers package if CONFIG_MODULES=n
  kbuild: enforce -Werror=return-type
  scripts: remove namespace.pl
  builddeb: Add support for all required debian/rules targets
  builddeb: Enable rootless builds
  builddeb: Pass -n to gzip for reproducible packages
  kbuild: split the build log of kallsyms
  kbuild: explicitly specify the build id style
  scripts/setlocalversion: make git describe output more reliable
  kbuild: remove cc-option test of -Werror=date-time
  kbuild: remove cc-option test of -fno-stack-check
  kbuild: remove cc-option test of -fno-strict-overflow
  kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles
  kbuild: remove redundant CONFIG_KASAN check from scripts/Makefile.kasan
  kbuild: do not create built-in objects for external module builds
  ...

diff --cc Documentation/process/submit-checklist.rst
Simple merge

diff --cc MAINTAINERS
Simple merge

diff --cc Makefile
index ebbd34801476a657a7c80f3077cd279296dbd5e5,17a62e365a38062ab41ad7df2b18e143e16a4272..e71979882e4fcf92fb0f14fbe4284f901492e6a7
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -919,10 -932,19 +928,10 @@@ KBUILD_CFLAGS += $(call cc-disable-warn
  KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
  
  # disable invalid "can't wrap" optimizations for signed / pointers
- KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
+ KBUILD_CFLAGS += -fno-strict-overflow
  
 -# clang sets -fmerge-all-constants by default as optimization, but this
 -# is non-conforming behavior for C and in fact breaks the kernel, so we
 -# need to disable it here generally.
 -KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
 -
 -# for gcc -fno-merge-all-constants disables everything, but it is fine
 -# to have actual conforming behavior enabled.
 -KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
 -
  # Make sure -fstack-check isn't enabled (like gentoo apparently did)
- KBUILD_CFLAGS  += $(call cc-option,-fno-stack-check,)
+ KBUILD_CFLAGS  += -fno-stack-check
  
  # conserve stack if available
  KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)

diff --cc arch/arm/Makefile
index c4301437ca72e0b61cdea449ef33551c98bffc3e,a0cb15de96778572cb1513850da28f9c046f4a4f..2874cd9923b7aef17924b2e32ff89385a32a7de0
--- 1/arch/arm/Makefile
--- 2/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@@ -16,14 -16,6 +16,10 @@@ LDFLAGS_vmlinux     += --be
  KBUILD_LDFLAGS_MODULE += --be8
  endif
  
- ifeq ($(CONFIG_ARM_MODULE_PLTS),y)
- KBUILD_LDS_MODULE     += $(srctree)/arch/arm/kernel/module.lds
- endif
- 
 +# We never want expected sections to be placed heuristically by the
 +# linker. All sections should be explicitly named in the linker script.
 +LDFLAGS_vmlinux += $(call ld-option, --orphan-handling=warn)
 +
  GZFLAGS               :=-9
  #KBUILD_CFLAGS        +=-pipe
  

diff --cc arch/arm64/Makefile
Simple merge

diff --cc arch/arm64/kernel/vdso/Makefile
Simple merge

diff --cc arch/powerpc/Makefile
Simple merge

diff --cc arch/powerpc/kernel/vdso32/Makefile
Simple merge

diff --cc arch/powerpc/kernel/vdso64/Makefile
Simple merge

diff --cc arch/riscv/Makefile
Simple merge

diff --cc arch/s390/kernel/vdso64/Makefile
Simple merge

diff --cc include/asm-generic/Kbuild
Simple merge

diff --cc kernel/Makefile
Simple merge

diff --cc lib/Kconfig.debug
Simple merge

diff --cc scripts/Makefile.kcsan
index c37f9518d5d957316fb6c663af76ddb9fb50aee3,cec50d74e0d0a6faa1778bed07949f2c030c1179..37cb504c77e136e6838a166d184978c4e5e0d97a
--- 1/scripts/Makefile.kcsan
--- 2/scripts/Makefile.kcsan
+++ b/scripts/Makefile.kcsan
@@@ -9,7 -9,7 +9,7 @@@ endi
  
  # Keep most options here optional, to allow enabling more compilers if absence
  # of some options does not break KCSAN nor causes false positive reports.
- CFLAGS_KCSAN := -fsanitize=thread \
+ export CFLAGS_KCSAN := -fsanitize=thread \
        $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0) -fno-optimize-sibling-calls) \
 -      $(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1)) \
 +      $(call cc-option,$(call cc-param,tsan-compound-read-before-write=1),$(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1))) \
        $(call cc-param,tsan-distinguish-volatile=1)

diff --cc scripts/Makefile.ubsan
Simple merge

diff --cc scripts/link-vmlinux.sh
Simple merge

diff --cc tools/testing/selftests/bpf/Makefile
Simple merge