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

From: Masahiro Yamada
Date: Sat Jun 06 2020 - 11:19:34 EST

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