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Kbuild fixes for v6.2 (3rd) 

- Hide LDFLAGS_vmlinux from decompressor Makefiles to fix error messages
    when GNU Make 4.4 is used.
 
  - Fix 'make modules' build error when CONFIG_DEBUG_INFO_BTF_MODULES=y.
 
  - Fix warnings emitted by GNU Make 4.4 in scripts/kconfig/Makefile.
 
  - Support GNU Make 4.4 for scripts/jobserver-exec.
 
  - Show clearer error message when kernel/gen_kheaders.sh fails due to
    missing cpio.
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Merge tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Hide LDFLAGS_vmlinux from decompressor Makefiles to fix error
   messages when GNU Make 4.4 is used.

 - Fix 'make modules' build error when CONFIG_DEBUG_INFO_BTF_MODULES=y.

 - Fix warnings emitted by GNU Make 4.4 in scripts/kconfig/Makefile.

 - Support GNU Make 4.4 for scripts/jobserver-exec.

 - Show clearer error message when kernel/gen_kheaders.sh fails due to
   missing cpio.

* tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kheaders: explicitly validate existence of cpio command
  scripts: support GNU make 4.4 in jobserver-exec
  kconfig: Update all declared targets
  scripts: rpm: make clear that mkspec script contains 4.13 feature
  init/Kconfig: fix LOCALVERSION_AUTO help text
  kbuild: fix 'make modules' error when CONFIG_DEBUG_INFO_BTF_MODULES=y
  kbuild: export top-level LDFLAGS_vmlinux only to scripts/Makefile.vmlinux
  init/version-timestamp.c: remove unneeded #include <linux/version.h>
  docs: kbuild: remove mention to dropped $(objtree) feature
This commit is contained in:
Linus Torvalds 2023-01-21 10:56:37 -08:00
parent f3bbac3247 13e1df0928
commit 83cd5fd014
9 changed files with 35 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/kbuild/makefiles.rst
View File

@ -1042,7 +1042,7 @@ $(clean-files).
When executing "make clean", the file "crc32table.h" will be deleted.
Kbuild will assume files to be in the same relative directory as the
Makefile, except if prefixed with $(objtree).
Makefile.
To exclude certain files or directories from make clean, use the
$(no-clean-files) variable.

15
Makefile
View File

@ -549,7 +549,7 @@ LDFLAGS_MODULE =
CFLAGS_KERNEL =
RUSTFLAGS_KERNEL =
AFLAGS_KERNEL =
export LDFLAGS_vmlinux =
LDFLAGS_vmlinux =
# Use USERINCLUDE when you must reference the UAPI directories only.
USERINCLUDE := \
@ -1248,6 +1248,18 @@ vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
@:
PHONY += vmlinux
# LDFLAGS_vmlinux in the top Makefile defines linker flags for the top vmlinux,
# not for decompressors. LDFLAGS_vmlinux in arch/*/boot/compressed/Makefile is
# unrelated; the decompressors just happen to have the same base name,
# arch/*/boot/compressed/vmlinux.
# Export LDFLAGS_vmlinux only to scripts/Makefile.vmlinux.
#
# _LDFLAGS_vmlinux is a workaround for the 'private export' bug:
# https://savannah.gnu.org/bugs/?61463
# For Make > 4.4, the following simple code will work:
# vmlinux: private export LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
vmlinux: private _LDFLAGS_vmlinux := $(LDFLAGS_vmlinux)
vmlinux: export LDFLAGS_vmlinux = $(_LDFLAGS_vmlinux)
vmlinux: vmlinux.o $(KBUILD_LDS) modpost
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
@ -1533,6 +1545,7 @@ endif
# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES
# is an exception.
ifdef CONFIG_DEBUG_INFO_BTF_MODULES
KBUILD_BUILTIN := 1
modules: vmlinux
endif

2
init/Kconfig
View File

@ -204,7 +204,7 @@ config LOCALVERSION_AUTO
appended after any matching localversion* files, and after the value
set in CONFIG_LOCALVERSION.
(The actual string used here is the first eight characters produced
(The actual string used here is the first 12 characters produced
by running the command:
$ git rev-parse --verify HEAD

1
init/version-timestamp.c
View File

@ -2,7 +2,6 @@
#include <generated/compile.h>
#include <generated/utsrelease.h>
#include <linux/version.h>
#include <linux/proc_ns.h>
#include <linux/refcount.h>
#include <linux/uts.h>

2
kernel/gen_kheaders.sh
View File

@ -14,6 +14,8 @@ include/
arch/$SRCARCH/include/
"
type cpio > /dev/null
# Support incremental builds by skipping archive generation
# if timestamps of files being archived are not changed.

19
scripts/jobserver-exec
View File

@ -26,11 +26,20 @@ try:
# If the MAKEFLAGS variable contains multiple instances of the
# --jobserver-auth= option, the last one is relevant.
fds = opts[-1].split("=", 1)[1]
reader, writer = [int(x) for x in fds.split(",", 1)]
# Open a private copy of reader to avoid setting nonblocking
# on an unexpecting process with the same reader fd.
reader = os.open("/proc/self/fd/%d" % (reader),
os.O_RDONLY | os.O_NONBLOCK)
# Starting with GNU Make 4.4, named pipes are used for reader and writer.
# Example argument: --jobserver-auth=fifo:/tmp/GMfifo8134
_, _, path = fds.partition('fifo:')
if path:
reader = os.open(path, os.O_RDONLY | os.O_NONBLOCK)
writer = os.open(path, os.O_WRONLY)
else:
reader, writer = [int(x) for x in fds.split(",", 1)]
# Open a private copy of reader to avoid setting nonblocking
# on an unexpecting process with the same reader fd.
reader = os.open("/proc/self/fd/%d" % (reader),
os.O_RDONLY | os.O_NONBLOCK)
# Read out as many jobserver slots as possible.
while True:

2
scripts/kconfig/.gitignore vendored
View File

@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
/conf
/[gmnq]conf
/[gmnq]conf-bin
/[gmnq]conf-cflags
/[gmnq]conf-libs
/qconf-bin
/qconf-moc.cc

2
scripts/kconfig/Makefile
View File

@ -209,7 +209,7 @@ $(obj)/gconf: | $(obj)/gconf-libs
$(obj)/gconf.o: | $(obj)/gconf-cflags
# check if necessary packages are available, and configure build flags
cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin)
cmd_conf_cfg = $< $(addprefix $(obj)/$*conf-, cflags libs bin); touch $(obj)/$*conf-bin
$(obj)/%conf-cflags $(obj)/%conf-libs $(obj)/%conf-bin: $(src)/%conf-cfg.sh
$(call cmd,conf_cfg)

2
scripts/package/mkspec
View File

@ -1,7 +1,7 @@
#!/bin/sh
#
# Output a simple RPM spec file.
# This version assumes a minimum of RPM 4.0.3.
# This version assumes a minimum of RPM 4.13
#
# The only gothic bit here is redefining install_post to avoid
# stripping the symbols from files in the kernel which we want