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If pkg-config is not installed when libtraceevent is linked, the build fails.
The error information is as follows:
$ make
<SNIP>
In file included from /home/yjh/projects_linux/perf-tool-next/linux/tools/perf/util/evsel.c:43:
/home/yjh/projects_linux/perf-tool-next/linux/tools/perf/util/trace-event.h:149:62: error: operator '&&' has no right operand
149 | #if defined(LIBTRACEEVENT_VERSION) && LIBTRACEEVENT_VERSION >= MAKE_LIBTRACEEVENT_VERSION(1, 5, 0)
| ^~
error: command '/usr/bin/gcc' failed with exit code 1
cp: cannot stat 'python_ext_build/lib/perf*.so': No such file or directory
make[2]: *** [Makefile.perf:668: python/perf.cpython-310-x86_64-linux-gnu.so] Error 1
make[2]: *** Waiting for unfinished jobs....
Because pkg-config is not installed, fail to get libtraceevent version in
Makefile.config file. As a result, LIBTRACEEVENT_VERSION is empty.
However, the preceding error information is not user-friendly.
Identify errors in advance by checking that pkg-config is installed at
compile time.
The build results of various scenarios are as follows:
1. build successful when libtraceevent is not linked and pkg-config is not installed
$ pkg-config --version
-bash: /usr/bin/pkg-config: No such file or directory
$ make clean >/dev/null
$ make NO_LIBTRACEEVENT=1 >/dev/null
Makefile.config:1133: No alternatives command found, you need to set JDIR= to point to the root of your Java directory
PERF_VERSION = 6.7.rc6.gd988c9f511af
$ echo $?
0
2. dummy pkg-config is missing when libtraceevent is linked
$ pkg-config --version
-bash: /usr/bin/pkg-config: No such file or directory
$ make clean >/dev/null
$ make >/dev/null
Makefile.config:221: *** Error: pkg-config needed by libtraceevent is missing on this system, please install it. Stop.
make[1]: *** [Makefile.perf:251: sub-make] Error 2
make: *** [Makefile:70: all] Error 2
$ echo $?
2
3. build successful when libtraceevent is linked and pkg-config is installed
$ pkg-config --version
0.29.2
$ make clean >/dev/null
$ make >/dev/null
Makefile.config:1133: No alternatives command found, you need to set JDIR= to point to the root of your Java directory
PERF_VERSION = 6.7.rc6.gd988c9f511af
$ echo $?
0
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240112034019.3558584-1-yangjihong1@huawei.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.