linux-kernel - [PATCH v1 0/1] scripts: Fix "make gtags" for O= kernel builds

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Message-Id: <20230504201833.202494-1-darwi@linutronix.de>
Date:   Thu,  4 May 2023 22:18:32 +0200
From:   "Ahmed S. Darwish" <darwi@...utronix.de>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>
Cc:     Thomas Gleixner <tglx@...utronix.de>, linux-kbuild@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        "Ahmed S. Darwish" <darwi@...utronix.de>
Subject: [PATCH v1 0/1] scripts: Fix "make gtags" for O= kernel builds

Hi,

make gtags for O= kernel builds is currently broken. For example, when doing:

   make O=../build/ x86_64_defconfig
   make O=../build/ gtags

gtags generates a warning for each kernel source file to be indexed:

   make[1]: Entering directory '/home/darwi/build'
     GEN     gtags
   Warning: '/home/darwi/linux/arch/x86/include/asm/qspinlock.h' is out of source tree. ignored.
   Warning: '/home/darwi/linux/arch/x86/include/asm/hpet.h' is out of source tree. ignored.
   ...
   Warning: '/home/darwi/linux/virt/lib/irqbypass.c' is out of source tree. ignored.
   make[1]: Leaving directory '/home/darwi/build/'

and then generates an empty index:

   $ du -hs ~/build/G*
   16K	/home/darwi/build/GPATH
   16K	/home/darwi/build/GRTAGS
   16K	/home/darwi/build/GTAGS

This series includes a proposed fix. After applying it:

   $ make O=../build/ gtags
   make[1]: Entering directory '/home/darwi/build'
     GEN     gtags
   make[1]: Leaving directory '/home/darwi/build'

   $ du -hs ~/build/G*
   9.1M	/home/darwi/build/GPATH
   506M	/home/darwi/build/GRTAGS
   696M	/home/darwi/build/GTAGS

The generated files can then be integrated with editors or IDEs as
usual.

Thanks,

=>

Ahmed S. Darwish (1):
  scripts/tags.sh: Fix gtags generation for O= kernel builds

 scripts/tags.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

base-commit: 1a5304fecee523060f26e2778d9d8e33c0562df3
--
2.30.2