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Eneas U de Queiroz 6b8b5e7248 build: kernel: avoid unnecessary package rebuilds 
The $(LINUX_DIR)/.config timesptamp changes between runs of
make target/compile and make target/install (which builds the image).

Kernel-dependent packages and out of tree modules are built in between
those runs, and they check the .config timestamp to decide if they need
to be rebuilt.

Save the target/compile .config to use its timestamp if the file does
not change between runs.  That way the subsequent kernel packages are
not unnecessarily rebuilt when you run 'make' back to back.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
 		2021-11-01 20:18:55 +01:00
..
site Revert "build: use config.site generated by autoconf-lean, drop hardcoded sitefiles" 2021-03-02 11:35:45 +00:00
autotools.mk build: prevent dupes in autotools.mk 2021-03-01 16:16:32 +00:00
bpf.mk build: fix bpf toolchain dependency for qosify 2021-11-01 18:41:20 +01:00
cmake.mk include/cmake.mk: fix host builds with CMAKE_BINARY_SUBDIR 2021-10-20 11:35:34 +02:00
debug.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
depends.mk build: introduce $(MKHASH) 2021-05-13 15:13:15 +02:00
device_table.txt image: ensure that /dev/console exist in rootfs images 2013-08-27 12:02:58 +00:00
download.mk download: improve handling of invalid local files 2021-11-01 20:18:55 +01:00
feeds.mk build: ensure that dash isn't prepended twice to abi version suffix 2021-06-15 09:58:33 +02:00
hardened-ld-pie.specs build: add hardened builds with PIE (ASLR) support 2018-01-27 16:46:45 +01:00
hardening.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
host-build.mk download: improve handling of invalid local files 2021-11-01 20:18:55 +01:00
image-commands.mk build: move elecom-wrc-gs-factory to image-commands.mk 2021-10-30 22:05:25 +02:00
image.mk image: define DEVICE_DTS_DELIMITER as per-device variable 2021-10-24 11:19:58 +02:00
kernel-build.mk generic: Kconfig: exit on unset symbol 2021-08-10 13:14:52 +02:00
kernel-defaults.mk build: kernel: avoid unnecessary package rebuilds 2021-11-01 20:18:55 +01:00
kernel-version.mk kernel: bump 5.10 to 5.10.76 2021-10-30 21:17:20 +02:00
kernel.mk build: use -nostdinc and -isystem in NOSTDINC_FLAGS for out-of-tree kernel modules 2021-03-18 10:53:26 +01:00
logo.png include: update logo with better kerning 2021-01-18 09:31:39 -10:00
logo.svg include: update logo with better kerning 2021-01-18 09:31:39 -10:00
meson.mk tools/meson: update to 0.60.0 2021-10-30 21:17:20 +02:00
netfilter.mk netfilter: remove no-op kconfig symbols 2021-05-01 00:37:15 +02:00
nls.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
package-bin.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
package-defaults.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
package-dumpinfo.mk build: drop ABI version from metadata 2021-02-14 19:41:52 +01:00
package-ipkg.mk build: prepend ABI suffixes with a dash if package name ends with digit 2021-06-14 15:14:19 +02:00
package-seccomp.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
package.mk download: improve handling of invalid local files 2021-11-01 20:18:55 +01:00
prereq-build.mk build: prereq detect Python 3.10 for `python3` binary 2021-10-10 15:25:58 +01:00
prereq.mk Revert "build: replace which with Bash command built-in" 2021-03-03 22:51:39 +01:00
quilt.mk build: introduce $(MKHASH) 2021-05-13 15:13:15 +02:00
rootfs.mk build: reduce cleanup binary calls in rootfs.mk 2020-12-05 22:07:00 -10:00
scan.awk build: propagate override information to .packageinfo 2015-02-09 12:09:31 +00:00
scan.mk build: introduce $(MKHASH) 2021-05-13 15:13:15 +02:00
shell.sh build: use mkhash to replace various quirky md5sum/openssl calls 2017-01-05 11:09:12 +01:00
subdir.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
target.mk buildsystem: add CONFIG_SECCOMP 2021-10-16 02:00:47 +01:00
toolchain-build.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
toplevel.mk toplevel.mk: remove legacy packages feed from 'make distclean' 2021-02-20 13:11:10 -10:00
trusted-firmware-a.mk trusted-firmware-a: fix project name spelling 2021-02-13 20:11:57 +00:00
u-boot.mk u-boot.mk: always link host libraries static 2021-10-24 18:00:49 +02:00
uclibc++.mk uclibc++: remove 2021-10-24 18:20:50 +02:00
unpack.mk include: use cpio from staging dir 2021-02-28 00:09:09 +00:00
verbose.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00
version.mk build: use SPDX license tags 2021-02-05 14:54:47 +01:00