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7fb10233e0
Libraries should be listed last on the compiler's command line, so that the linker can look for and find still unresolved symbols. The librt library, required for the shm_* functions, was announced using CFLAGS, which puts the library *before* the source files, and fails compilation on my system: ====================== gcc -isystem /src/linux-selftests/usr/include -Wall -lrt test_cachestat.c -o /src/linux-selftests/kselftest/cachestat/test_cachestat /usr/bin/ld: /tmp/cceQWO3u.o: in function `test_cachestat_shmem': test_cachestat.c:(.text+0x890): undefined reference to `shm_open' /usr/bin/ld: test_cachestat.c:(.text+0x99c): undefined reference to `shm_unlink' collect2: error: ld returned 1 exit status make[4]: *** [../lib.mk:181: /src/linux-selftests/kselftest/cachestat/test_cachestat] Error 1 ====================== Announce the library using the LDLIBS variable, which ensures the proper ordering on the command line. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> |
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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.