Masahiro Yamada
394053f4a4
kbuild: make single targets work more correctly ...
Currently, the single target build directly descends into the directory
of the target. For example,
$ make foo/bar/baz.o
... directly descends into foo/bar/.
On the other hand, the normal build usually descends one directory at
a time, i.e. descends into foo/, and then foo/bar/.
This difference causes some problems.
[1] miss subdir-asflags-y, subdir-ccflags-y in upper Makefiles
The options in subdir-{as,cc}flags-y take effect in the current
and its sub-directories. In other words, they are inherited
downward. In the example above, the single target will miss
subdir-{as,cc}flags-y if they are defined in foo/Makefile.
[2] could be built in a different directory
As Documentation/kbuild/modules.rst section 4.3 says, Kbuild can
handle files that are spread over several sub-directories.
The build rule of foo/bar/baz.o may not necessarily be specified in
foo/bar/Makefile. It might be specifies in foo/Makefile as follows:
[foo/Makefile]
obj-y := bar/baz.o
This often happens when a module is so big that its source files
are divided into sub-directories.
In this case, there is no Makefile in the foo/bar/ directory, yet
the single target descends into foo/bar/, then fails due to the
missing Makefile. You can still do 'make foo/bar/' for partial
building, but cannot do 'make foo/bar/baz.s'. I believe the single
target '%.s' is a useful feature for inspecting the compiler output.
Some modules work around this issue by putting an empty Makefile
in every sub-directory.
This commit fixes those problems by making the single target build
descend in the same way as the normal build does.
Another change is the single target build will observe the CONFIG
options. Previously, it allowed users to build the foo.o even when
the corresponding CONFIG_FOO is disabled:
obj-$(CONFIG_FOO) += foo.o
In the new behavior, the single target build will just fail and show
"No rule to make target ..." (or "Nothing to be done for ..." if the
stale object already exists, but cannot be updated).
The disadvantage of this commit is the build speed. Now that the
single target build visits every directory and parses lots of
Makefiles, it is slower than before. (But, I hope it will not be
too slow.)
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-08-21 21:05:21 +09:00
locking/atomics: Use sed(1) instead of non-standard head(1) option
2019-06-25 10:17:07 +02:00
fixdep: check return value of printf() and putchar()
2019-07-01 10:30:39 +09:00
Kbuild updates for v5.3 (2nd)
2019-07-20 09:34:55 -07:00
Devicetree updates for v5.3:
2019-07-11 18:35:30 -07:00
docs: move gcc_plugins.txt to core-api and rename to .rst
2019-07-15 09:20:27 -03:00
scripts/gdb: add helpers to find and list devices
2019-07-16 19:23:24 -07:00
kbuild: make bison create C file and header in a single pattern rule
2019-08-14 01:10:42 +09:00
kconfig: Clear "written" flag to avoid data loss
2019-08-04 12:44:15 +09:00
modpost: check for static EXPORT_SYMBOL* functions
2019-08-14 01:10:18 +09:00
kbuild: create *.mod with full directory path and remove MODVERDIR
2019-07-18 02:19:31 +09:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166
2019-05-30 11:26:39 -07:00
scripts: remove unnecessary ihex2fw and check-lc_ctypes from .gitignore
2018-12-22 00:37:52 +09:00
kbuild: remove the first line of *.mod files
2019-07-18 02:19:31 +09:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
bloat-o-meter: ignore __addressable_ symbols
2018-12-28 12:11:44 -08:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 391
2019-06-05 17:37:11 +02:00
bpf: fix script for generating man page on BPF helpers
2019-05-13 01:12:45 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166
2019-05-30 11:26:39 -07:00
checkpatch.pl: warn on duplicate sysctl local variable
2019-07-16 19:23:22 -07:00
scripts/checkstack.pl: Fix arm64 wrong or unknown architecture
2019-06-05 02:33:10 +09:00
checksyscalls: fix up mq_timedreceive and stat exceptions
2019-02-19 21:27:53 +01:00
kbuild: update comment block of scripts/clang-version.sh
2019-03-04 22:34:54 +09:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 54
2019-05-24 17:36:42 +02:00
scripts/decode_stacktrace: Accept dash/underscore in modules
2019-07-12 11:05:41 -07:00
scripts/decodecode: set ARCH when running natively on arm/arm64
2018-12-28 12:11:44 -08:00
scripts/documentation-file-ref-check: ignore output dir
2019-06-14 14:43:01 -06:00
kbuild: export_report: read modules.order instead of .tmp_versions/*.mod
2019-07-18 02:19:31 +09:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378
2019-06-05 17:37:10 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 339
2019-06-05 17:37:07 +02:00
scripts/faddr2line: fix location of start_kernel in comment
2018-11-18 10:15:09 -08:00
jump_label: move 'asm goto' support test to Kconfig
2019-01-06 09:46:51 +09:00
kbuild: clean up scripts/gcc-version.sh
2019-03-04 22:35:04 +09:00
gen_compile_commands: lower the entry count threshold
2019-07-27 12:18:19 +09:00
kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS
2018-12-01 23:13:14 +09:00
doc: ABI scripts: add a SPDX header file
2019-06-21 16:58:37 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61
2019-05-24 17:36:45 +02:00
get_maintainer: add ability to skip moderated mailing lists
2019-07-16 19:23:22 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166
2019-05-30 11:26:39 -07:00
kbuild: re-implement detection of CONFIG options leaked to user-space
2019-08-21 21:05:21 +09:00
kallsyms: exclude kasan local symbols on s390
2019-07-08 02:25:59 +09:00
kbuild: remove unused objectify macro
2019-07-27 12:18:19 +09:00
kbuild: Fail if gold linker is detected
2019-08-14 01:10:42 +09:00
kernel-doc: Don't try to mark up function names
2019-06-26 11:14:15 -06:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166
2019-05-30 11:26:39 -07:00
kbuild: Parameterize kallsyms generation and correct reporting
2019-08-21 21:05:21 +09:00
kbuild: remove build_unifdef target in scripts/Makefile
2019-06-15 19:57:01 +09:00
kbuild: force all architectures except um to include mandatory-y
2019-03-17 12:56:32 +09:00
kbuild: make single targets work more correctly
2019-08-21 21:05:21 +09:00
kbuild: Remove unnecessary -Wno-unused-value
2019-06-24 03:43:03 +09:00
gcc-plugins: structleak: Generalize to all variable types
2019-03-04 09:29:41 -08:00
kbuild: fix 'No such file or directory' warning for headers_install
2019-06-24 03:43:03 +09:00
kbuild: move flex and bison rules to Makefile.host
2019-08-14 01:10:42 +09:00
kasan: remove use after scope bugs detection.
2019-03-05 21:07:13 -08:00
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
kbuild: treat an object as multi-used when $(foo-) is set
2019-08-15 02:25:11 +09:00
kbuild: get rid of kernel/ prefix from in-tree modules.{order,builtin}
2019-07-17 22:39:27 +09:00
kbuild: modinst: read modules.order instead of $(MODVERDIR)/*.mod
2019-07-17 22:39:27 +09:00
kbuild: add [M] marker for build log of *.mod.o
2019-08-14 01:10:42 +09:00
kbuild: modsign: read modules.order instead of $(MODVERDIR)/*.mod
2019-07-17 22:39:27 +09:00
ubsan: Remove vla bound checks.
2019-05-06 11:12:09 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 373
2019-06-05 17:37:10 +02:00
Kbuild: Handle PREEMPT_RT for version string and magic
2019-08-14 01:10:42 +09:00
kbuild: mkmakefile: generate a simple wrapper of top Makefile
2019-04-02 23:27:38 +09:00
kbuild: get rid of kernel/ prefix from in-tree modules.{order,builtin}
2019-07-17 22:39:27 +09:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 199
2019-05-30 11:29:23 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378
2019-06-05 17:37:10 +02:00
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166
2019-05-30 11:26:39 -07:00
scripts/setlocalversion: Improve -dirty check with git-status --no-optional-locks
2018-11-21 23:57:33 +09:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 438
2019-06-05 17:37:17 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378
2019-06-05 17:37:10 +02:00
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378
2019-06-05 17:37:10 +02:00
scripts: add spdxcheck.py self test
2018-12-28 12:11:44 -08:00
spdxcheck.py: fix directory structures
2019-06-01 15:51:31 -07:00
scripts/spelling.txt: add more spellings to spelling.txt
2019-07-12 11:05:41 -07:00
scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output
2019-07-17 06:57:52 -03:00
kbuild: add a flag to force absolute path for srctree
2019-07-11 00:05:09 +09:00
unifdef: use memcpy instead of strncpy
2018-11-30 14:45:01 -08:00
ver_linux: Assign constant RE to variable name for clarity
2019-01-22 13:34:35 +01:00
394053f4a4