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Masahiro Yamada faa91c472b fixdep: avoid parsing the same file over again 
The dep files (*.d files) emitted by C compilers usually contain the
deduplicated list of included files.

One exceptional case is when a header is included by the -include
command line option, and also by #include directive.

For example, the top Makefile adds the command line option,
"-include $(srctree)/include/linux/kconfig.h". You do not need to
include <linux/kconfig.h> in every source file.

In fact, include/linux/kconfig.h is listed twice in many .*.cmd files
due to include/linux/xarray.h having "#include <linux/kconfig.h>".
I did not fix that since it is a small redundancy.

However, this is more annoying for rustc. rustc emits the dependency
for each emission type.

For example, cmd_rustc_library emits dep-info, obj, and metadata.
So, the emitted *.d file contains the dependency for those 3 targets,
which makes fixdep parse the same file 3 times.

  $ grep rust/alloc/raw_vec.rs rust/.alloc.o.cmd
    rust/alloc/raw_vec.rs \
    rust/alloc/raw_vec.rs \
    rust/alloc/raw_vec.rs \

To skip the second parsing, this commit adds a hash table for parsed
files, just like we did for CONFIG options.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Tested-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
2023-01-22 23:43:33 +09:00
..
atomic kbuild: check sha1sum just once for each atomic header 2022-09-29 04:40:14 +09:00
basic fixdep: avoid parsing the same file over again 2023-01-22 23:43:33 +09:00
clang-tools kbuild: rename cmd_$@ to savedcmd_$@ in *.cmd files 2023-01-22 23:43:33 +09:00
coccinelle update Coccinelle URL 2022-08-07 21:30:36 +02:00
dtc scripts/dtc: Update to upstream version v1.6.1-63-g55778a03df61 2022-11-10 08:37:19 -06:00
dummy-tools kbuild: dummy-tools: pretend we understand __LONG_DOUBLE_128__ 2022-08-21 02:47:48 +09:00
gcc-plugins
gdb Updates to various subsystems which I help look after. lib, ocfs2, 2022-08-07 10:03:24 -07:00
genksyms
kconfig kconfig: Update all declared targets 2023-01-13 16:29:52 +09:00
ksymoops
mod Kbuild updates for v6.2 2022-12-19 12:33:32 -06:00
package scripts: rpm: make clear that mkspec script contains 4.13 feature 2023-01-11 20:42:34 +09:00
selinux selinux: remove runtime disable message in the install_policy.sh script 2022-09-20 14:12:25 -04:00
tracing
.gitignore scripts: add generate_rust_target.rs 2022-09-28 09:02:06 +02:00
adjust_autoksyms.sh
as-version.sh
asn1_compiler.c kbuild: do not print extra logs for V=2 2023-01-22 23:43:32 +09:00
bin2c.c
bloat-o-meter
bootgraph.pl
bpf_doc.py bpf: Rework process_dynptr_func 2022-12-08 18:25:31 -08:00
cc-can-link.sh
cc-version.sh Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
check_extable.sh
check-local-export kbuild: rewrite check-local-export in sh/awk 2022-09-29 04:40:15 +09:00
check-sysctl-docs
checkdeclares.pl
checkincludes.pl
checkkconfigsymbols.py
checkpatch.pl checkpatch: add check for array allocator family argument order 2022-11-30 16:13:16 -08:00
checkstack.pl
checksyscalls.sh
checkversion.pl
cleanfile
cleanpatch
coccicheck scripts: coccicheck: use "grep -E" instead of "egrep" 2022-09-21 21:23:56 +02:00
config
const_structs.checkpatch
decode_stacktrace.sh scripts: decode_stacktrace: demangle Rust symbols 2022-09-28 09:01:40 +02:00
decodecode scripts/decodecode: improve faulting line determination 2022-09-11 21:55:05 -07:00
depmod.sh
dev-needs.sh
diffconfig
documentation-file-ref-check
export_report.pl
extract_xc3028.pl
extract-ikconfig scripts/extract-ikconfig: add zstd compression support 2022-08-29 13:58:47 +09:00
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
faddr2line scripts/faddr2line: Fix regression in name resolution on ppc64le 2022-11-16 10:42:10 +01:00
file-size.sh
find-unused-docs.sh
gcc-x86_32-has-stack-protector.sh
gcc-x86_64-has-stack-protector.sh
gen_autoksyms.sh kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
gen_ksymdeps.sh
gen-randstruct-seed.sh
generate_initcall_order.pl
generate_rust_analyzer.py rust: add build_error crate 2022-12-04 01:59:16 +01:00
generate_rust_target.rs x86: enable initial Rust support 2022-09-28 09:02:45 +02:00
get_abi.pl
get_dvb_firmware
get_feat.pl
get_maintainer.pl
gfp-translate
head-object-list.txt RISC-V Patches for the 6.2 Merge Window, Part 1 2022-12-14 15:23:49 -08:00
headerdep.pl
headers_install.sh
insert-sys-cert.c
install.sh
is_rust_module.sh scripts: add is_rust_module.sh 2022-09-28 09:02:06 +02:00
jobserver-exec scripts: support GNU make 4.4 in jobserver-exec 2023-01-16 20:15:20 +09:00
kallsyms.c Char/Misc driver changes for 6.2-rc1 2022-12-16 03:49:24 -08:00
Kbuild.include kbuild: add more comments for KBUILD_NOCMDDEP=1 2023-01-22 23:43:33 +09:00
Kconfig.include Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
kernel-doc kbuild: do not print extra logs for V=2 2023-01-22 23:43:32 +09:00
ld-version.sh
leaking_addresses.pl
Lindent
link-vmlinux.sh kallsyms: Correctly sequence symbols when CONFIG_LTO_CLANG=y 2022-11-12 18:47:36 -08:00
Makefile Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
Makefile.asm-generic kbuild: add kbuild-file macro 2022-11-22 23:40:02 +09:00
Makefile.build kbuild: remove sed commands after rustc rules 2023-01-22 23:43:33 +09:00
Makefile.clang
Makefile.clean kbuild: add kbuild-file macro 2022-11-22 23:40:02 +09:00
Makefile.compiler kbuild: add test-{ge,gt,le,lt} macros 2022-12-13 22:21:14 +09:00
Makefile.debug Makefile.debug: support for -gz=zstd 2022-11-21 10:18:39 +09:00
Makefile.dtbinst kbuild: add kbuild-file macro 2022-11-22 23:40:02 +09:00
Makefile.extrawarn kbuild: add -Wundef to KBUILD_CPPFLAGS for W=1 builds 2022-12-11 17:28:32 +09:00
Makefile.gcc-plugins gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file 2022-08-16 12:25:53 -07:00
Makefile.headersinst
Makefile.host kbuild: remove sed commands after rustc rules 2023-01-22 23:43:33 +09:00
Makefile.kasan
Makefile.kcov
Makefile.kcsan
Makefile.kmsan kmsan: add KMSAN runtime core 2022-10-03 14:03:19 -07:00
Makefile.lib kbuild: unify cmd_dt_S_dtb and cmd_dt_S_dtbo 2023-01-22 23:43:33 +09:00
Makefile.modfinal kbuild: rename cmd_$@ to savedcmd_$@ in *.cmd files 2023-01-22 23:43:33 +09:00
Makefile.modinst kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
Makefile.modpost kbuild: readd -w option when vmlinux.o or Module.symver is missing 2023-01-05 16:53:48 +09:00
Makefile.package kbuild: add a missing line for help message 2022-12-30 17:22:14 +09:00
Makefile.randstruct
Makefile.ubsan
Makefile.userprogs
Makefile.vmlinux kbuild: Fix CFI hash randomization with KASAN 2023-01-13 15:22:03 -08:00
Makefile.vmlinux_o kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o 2022-10-03 03:52:58 +09:00
makelst
markup_oops.pl
min-tool-version.sh Documentation: raise minimum supported version of binutils to 2.25 2022-12-13 22:21:14 +09:00
misc-check kbuild: make W=1 warn files that are tracked but ignored by git 2023-01-22 23:43:33 +09:00
mkcompile_h Revert "kbuild: Make scripts/compile.h when sh != bash" 2022-09-29 04:40:15 +09:00
mksysmap kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols 2022-10-03 03:51:58 +09:00
mkuboot.sh
module.lds.S arm64: unwind: add asynchronous unwind tables to kernel and modules 2022-11-09 18:06:35 +00:00
modules-check.sh kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
nsdeps
objdiff
objdump-func
pahole-flags.sh
pahole-version.sh
parse-maintainers.pl
patch-kernel
profile2linkerlist.pl
prune-kernel
recordmcount.c LoongArch/ftrace: Add recordmcount support 2022-12-14 08:41:53 +08:00
recordmcount.h
recordmcount.pl
remove-stale-files kbuild: clean up stale file removal 2023-01-22 23:43:32 +09:00
rust_is_available_bindgen_libclang.h scripts: add rust_is_available.sh 2022-09-28 09:02:06 +02:00
rust_is_available.sh scripts: add rust_is_available.sh 2022-09-28 09:02:06 +02:00
setlocalversion
show_delta
sign-file.c sign-file: Fix confusing error messages 2022-08-03 23:56:20 +03:00
sorttable.c LoongArch: extable: Add type and data fields 2022-12-14 08:36:11 +08:00
sorttable.h
spdxcheck-test.sh
spdxcheck.py
spdxexclude
spelling.txt scripts/spelling.txt: add more spellings to spelling.txt 2022-11-18 13:55:09 -08:00
sphinx-pre-install docs: sphinx-pre-install: don't require the RTD theme 2022-10-13 11:14:43 -06:00
split-man.pl
stackdelta
stackusage
subarch.include
syscallhdr.sh
syscallnr.sh
syscalltbl.sh
tags.sh kbuild: allow to combine multiple V= levels 2023-01-22 23:43:32 +09:00
test_fortify.sh
tools-support-relr.sh
unifdef.c
ver_linux
xen-hypercalls.sh
xz_wrap.sh