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James Clark bd044ae163 libperf: Don't remove -g when EXTRA_CFLAGS are used 
[ Upstream commit f5b07010c1 ]

When using EXTRA_CFLAGS, for example "EXTRA_CFLAGS=-DREFCNT_CHECKING=1",
this construct stops setting -g which you'd expect would not be affected
by adding extra flags. Additionally, EXTRA_CFLAGS should be the last
thing to be appended so that it can be used to undo any defaults. And no
condition is required, just += appends to any existing CFLAGS and also
appends or doesn't append EXTRA_CFLAGS if they are or aren't set.

It's not clear why DEBUG=1 is required for -g in Perf when in libperf
it's always on, but I don't think we need to change that behavior now
because someone may be depending on it.

Signed-off-by: James Clark <james.clark@linaro.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250319114009.417865-1-james.clark@linaro.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Stable-dep-of: 8c5b40678c ("libperf build: Always place libperf includes first")
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:19:55 -05:00
arch MIPS: Work around LLVM bug when gp is used as global register variable 2026-03-04 07:19:54 -05:00
block block,bfq: fix aux stat accumulation destination 2026-02-11 13:35:29 +01:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec 2026-02-06 16:41:53 +01:00
Documentation PCI: endpoint: Automatically create a function specific attributes group 2026-02-19 16:21:46 +01:00
drivers ata: pata_ftide010: Fix some DMA timings 2026-03-04 07:19:55 -05:00
fs ext4: use optimized mballoc scanning regardless of inode format 2026-03-04 07:19:54 -05:00
include ipv6: fix a race in ip6_sock_set_v6only() 2026-03-04 07:19:51 -05:00
init init: handle bootloader identifier in kernel parameters 2025-10-19 16:21:45 +02:00
io_uring io_uring: fix filename leak in __io_openat_prep() 2026-01-19 13:09:54 +01:00
ipc ipc: fix to protect IPCS lookups using RCU 2025-06-27 11:05:26 +01:00
kernel tracing: Remove duplicate ENABLE_EVENT_STR and DISABLE_EVENT_STR macros 2026-03-04 07:19:44 -05:00
lib lib/crypto: aes: Fix missing MMU protection for AES S-box 2026-01-19 13:10:13 +01:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm/kfence: randomize the freelist on initialization 2026-02-11 13:35:27 +01:00
net SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path 2026-03-04 07:19:55 -05:00
samples samples: mei: Fix building on musl libc 2025-08-28 16:24:07 +02:00
scripts kbuild: Use CRC32 and a 1MiB dictionary for XZ compressed modules 2026-01-19 13:10:05 +01:00
security apparmor: fix invalid deref of rawdata when export_binary is unset 2026-03-04 07:19:53 -05:00
sound ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put() 2026-03-04 07:19:53 -05:00
tools libperf: Don't remove -g when EXTRA_CFLAGS are used 2026-03-04 07:19:55 -05:00
usr kbuild: hdrcheck: fix cross build with clang 2025-06-27 11:05:22 +01:00
virt KVM: Don't clobber irqfd routing type when deassigning irqfd 2026-02-11 13:35:27 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Remove *.orig pattern from .gitignore 2024-10-17 15:11:10 +02:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS staging: rtl8712: Remove driver using deprecated API wext 2025-12-07 06:09:36 +09:00
Makefile Linux 5.15.201 2026-02-19 16:21:47 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.