[GIT PULL 1/2] Kbuild updates for v5.8-rc1

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Hi Linus,

Please pull Kbuild updates for v5.8-rc1

Some commit dates are very new because I fixed up some
typos in a comment line and commit description.
That is why some commit hashes are missing in linux-next.
Other than the typos, they were tested in linux-next.





The following changes since commit 2ef96a5bb12be62ef75b5828c0aab838ebb29cb8:

  Linux 5.7-rc5 (2020-05-10 15:16:58 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
tags/kbuild-v5.8

for you to fetch changes up to 8dfb61dcbaceb19a5ded5e9c9dcf8d05acc32294:

  kbuild: add variables for compression tools (2020-06-06 23:42:01 +0900)

----------------------------------------------------------------
Kbuild updates for v5.8

 - fix warnings in 'make clean' for ARCH=um, hexagon, h8300, unicore32

 - ensure to rebuild all objects when the compiler is upgraded

 - exclude system headers from dependency tracking and fixdep processing

 - fix potential bit-size mismatch between the kernel and BPF user-mode
   helper

 - add the new syntax 'userprogs' to build user-space programs for the
   target architecture (the same arch as the kernel)

 - compile user-space sample code under samples/ for the target arch
   instead of the host arch

 - make headers_install fail if a CONFIG option is leaked to user-space

 - sanitize the output format of scripts/checkstack.pl

 - handle ARM 'push' instruction in scripts/checkstack.pl

 - error out before modpost if a module name conflict is found

 - error out when multiple directories are passed to M= because this
   feature is broken for a long time

 - add CONFIG_DEBUG_INFO_COMPRESSED to support compressed debug info

 - a lot of cleanups of modpost

 - dump vmlinux symbols out into vmlinux.symvers, and reuse it in the
   second pass of modpost

 - do not run the second pass of modpost if nothing in modules is updated

 - install modules.builtin(.modinfo) by 'make install' as well as by
   'make modules_install' because it is useful even when CONFIG_MODULES=n

 - add new command line variables, GZIP, BZIP2, LZOP, LZMA, LZ4, and XZ
   to allow users to use alternatives such as pigz, pbzip2, etc.

----------------------------------------------------------------
Denis Efremov (1):
      kbuild: add variables for compression tools

Gustavo A. R. Silva (1):
      modpost,fixdep: Replace zero-length array with flexible-array

Jonas Zeiger (1):
      Makefile: install modules.builtin even if CONFIG_MODULES=n

Maninder Singh (4):
      scripts/checkstack.pl: don't display $dre as different entity
      scripts/checkstack.pl: Add argument to print stacks greather than value.
      scripts/checkstack.pl: add arm push handling for stack usage
      scripts/checkstack.pl: fix arm sp regex

Masahiro Yamada (84):
      um: do not evaluate compiler's library path when cleaning
      hexagon: suppress error message for 'make clean'
      h8300: suppress error messages for 'make clean'
      unicore32: do not evaluate compiler's library path when cleaning
      kbuild: use $(CC_VERSION_TEXT) to evaluate CC_IS_GCC and CC_IS_CLANG
      kbuild: ensure full rebuild when the compiler is updated
      kbuild: use -MMD instead of -MD to exclude system headers from dependency
      kbuild: use CONFIG_CC_VERSION_TEXT to construct LINUX_COMPILER macro
      Revert "objtool: Skip samples subdirectory"
      kbuild: remove '/' target
      kbuild: remove unused AS assignment
      kbuild: determine the output format of DTC by the target suffix
      kbuild: warn if always, hostprogs-y, or hostprogs-m is used
      bpfilter: match bit size of bpfilter_umh to that of the kernel
      bpfilter: check if $(CC) can link static libc in Kconfig
      kbuild: add infrastructure to build userspace programs
      bpfilter: use 'userprogs' syntax to build bpfilter_umh
      samples: seccomp: build sample programs for target architecture
      kbuild: doc: document the new syntax 'userprogs'
      samples: uhid: build sample program for target architecture
      samples: hidraw: build sample program for target architecture
      samples: connector: build sample program for target architecture
      samples: vfs: build sample programs for target architecture
      samples: pidfd: build sample program for target architecture
      samples: mei: build sample program for target architecture
      samples: auxdisplay: use 'userprogs' syntax
      samples: timers: use 'userprogs' syntax
      samples: watchdog: use 'userprogs' syntax
      kbuild: invoke syncconfig if autoconf.h is missing
      kbuild: remove misleading stale FIXME comment
      kbuild: remove {CLEAN,MRPROPER,DISTCLEAN}_DIRS
      gcc-plugins: remove always-false $(if ...) in Makefile
      kbuild: add this-makefile as a shorthand for $(lastword $(MAKEFILE_LIST))
      kbuild: error out if targets prefixed with '__' are directly run
      kbuild: make module name conflict fatal error
      kbuild: doc: remove documentation about copying Module.symvers around
      kbuild: remove ifdef builtin-target / lib-target
      kbuild: clear KBUILD_MODULES in top Makefile if CONFIG_MODULES=n
      kbuild: move subdir-obj-y to scripts/Makefile.build
      kbuild: rename subdir-obj-y to subdir-builtin
      kbuild: make modules.order rule consistent with built-in.a
      kbuild: disallow multi-word in M= or KBUILD_EXTMOD
      modpost: fix potential segmentation fault for addend_i386_rel()
      modpost: refactor sech_name()
      kbuild: force to build vmlinux if CONFIG_MODVERSION=y
      kbuild: merge two 'ifdef CONFIG_TRIM_UNUSED_KSYMS' blocks
      kbuild: refactor subdir-ym calculation
      kbuild: refactor tagets caluculation for KBUILD_{BUILTIN,KBUILD_MODULES}
      kbuild: merge init-y into core-y
      kbuild: merge net-y and virt-y into drivers-y
      kbuild: refactor KBUILD_VMLINUX_{OBJS,LIBS} calculation
      kbuild: update modules.order only when contained modules are updated
      modpost: fix -i (--ignore-errors) MAKEFLAGS detection
      modpost: move -T option close to the modpost command
      modpost: pass -N option only for modules modpost
      modpost: load KBUILD_EXTRA_SYMBOLS files in order
      modpost: track if the symbol origin is a dump file or ELF object
      modpost: allow to pass -i option multiple times to remove -e option
      modpost: rename ext_sym_list to dump_list
      modpost: re-add -e to set external_module flag
      modpost: print symbol dump file as the build target in short log
      modpost: refactor -i option calculation
      modpost: generate vmlinux.symvers and reuse it for the second modpost
      modpost: invoke modpost only when input files are updated
      modpost: show warning if vmlinux is not found when processing modules
      modpost: show warning if any of symbol dump files is missing
      modpost: drop RCS/CVS $Revision handling in MODULE_VERSION()
      modpost: do not call get_modinfo() for vmlinux(.o)
      modpost: add read_text_file() and get_line() helpers
      modpost: fix potential mmap'ed file overrun in get_src_version()
      modpost: avoid false-positive file open error
      modpost: use read_text_file() and get_line() for reading text files
      modpost: remove get_next_text() and make {grab,release_}file static
      modpost: remove -s option
      modpost: move -d option in scripts/Makefile.modpost
      modpost: remove mod->is_dot_o struct member
      modpost: remove is_vmlinux() call in check_for_{gpl_usage,unused}()
      modpost: add mod->is_vmlinux struct member
      modpost: remove mod->skip struct member
      modpost: set have_vmlinux in new_module()
      modpost: strip .o from modname before calling new_module()
      modpost: remove is_vmlinux() helper
      modpost: change elf_info->size to size_t
      kbuild: doc: rename LDFLAGS to KBUILD_LDFLAGS

Nick Desaulniers (1):
      Makefile: support compressed debug info

Sam Ravnborg (1):
      samples: uhid: fix warnings in uhid-example

Siddharth Gupta (1):
      scripts: headers_install: Exit with error on config leak

Valdis Kletnieks (1):
      bpfilter: document build requirements for bpfilter_umh

ashimida (1):
      mksysmap: Fix the mismatch of '.L' symbols in System.map

 .gitignore                          |   1 +
 Documentation/dontdiff              |   1 +
 Documentation/kbuild/makefiles.rst  | 187 +++++++++++----
 Documentation/kbuild/modules.rst    |  12 -
 Kconfig                             |   2 -
 Makefile                            | 217 ++++++++++-------
 arch/arm/Makefile                   |   2 -
 arch/arm/boot/deflate_xip_data.sh   |   2 +-
 arch/arm64/Makefile                 |   2 -
 arch/h8300/boot/compressed/Makefile |   2 +-
 arch/hexagon/Makefile               |   2 +-
 arch/ia64/Makefile                  |   2 +-
 arch/m68k/Makefile                  |   8 +-
 arch/parisc/Makefile                |   2 +-
 arch/um/Makefile                    |   2 +-
 arch/um/drivers/Makefile            |   4 +-
 arch/unicore32/lib/Makefile         |   4 +-
 include/linux/kconfig.h             |   2 +
 init/Kconfig                        |  30 ++-
 init/Makefile                       |   2 +-
 kernel/gen_kheaders.sh              |   2 +-
 lib/Kconfig.debug                   |  17 ++
 net/bpfilter/Kconfig                |   6 +-
 net/bpfilter/Makefile               |  11 +-
 samples/Kconfig                     |  26 +-
 samples/Makefile                    |   5 +-
 samples/auxdisplay/Makefile         |  11 +-
 samples/connector/Makefile          |  12 +-
 samples/hidraw/Makefile             |   9 +-
 samples/mei/Makefile                |   9 +-
 samples/pidfd/Makefile              |   8 +-
 samples/seccomp/Makefile            |  42 +---
 samples/timers/Makefile             |  17 +-
 samples/uhid/.gitignore             |   2 +
 samples/uhid/Makefile               |   9 +-
 samples/uhid/uhid-example.c         |   4 +-
 samples/vfs/Makefile                |  11 +-
 samples/watchdog/Makefile           |  10 +-
 scripts/Kbuild.include              |   2 +-
 scripts/Makefile.build              |  67 +++---
 scripts/Makefile.clean              |   2 +-
 scripts/Makefile.host               |   4 +-
 scripts/Makefile.lib                |  79 +++---
 scripts/Makefile.modpost            |  75 ++++--
 scripts/Makefile.package            |   8 +-
 scripts/Makefile.userprogs          |  45 ++++
 scripts/basic/fixdep.c              |   2 +-
 scripts/checkstack.pl               |  87 ++++---
 scripts/gcc-plugins/Makefile        |   2 +-
 scripts/headers_install.sh          |  11 +-
 scripts/link-vmlinux.sh             |   2 -
 scripts/mkcompile_h                 |   3 +-
 scripts/mksysmap                    |   2 +-
 scripts/mod/modpost.c               | 386 ++++++++++++++----------------
 scripts/mod/modpost.h               |  19 +-
 scripts/mod/sumversion.c            | 117 ++-------
 scripts/modules-check.sh            |  16 +-
 scripts/package/buildtar            |   6 +-
 scripts/xz_wrap.sh                  |   2 +-
 usr/include/Makefile                |   6 +-
 60 files changed, 883 insertions(+), 757 deletions(-)
 create mode 100644 samples/uhid/.gitignore
 create mode 100644 scripts/Makefile.userprogs



-- 
Best Regards
Masahiro Yamada



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