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| Filename | Latest commit message | Latest commit date |
|---|---|---|
2047f1d8ba
Currently we can't build some tests, for example:
$ make -C tools/testing/selftests/ TARGETS=vm
...
gcc -Wall -I ../../../../usr/include -lrt -lpthread ../../../../usr/include/linux/kernel.h userfaultfd.c -o tools/testing/selftests/vm/userfaultfd
/tmp/ccmOkQSM.o: In function `stress':
userfaultfd.c:(.text+0xc60): undefined reference to `pthread_create'
userfaultfd.c:(.text+0xca5): undefined reference to `pthread_create'
userfaultfd.c:(.text+0xcee): undefined reference to `pthread_create'
userfaultfd.c:(.text+0xd30): undefined reference to `pthread_create'
userfaultfd.c:(.text+0xd77): undefined reference to `pthread_join'
userfaultfd.c:(.text+0xe7d): undefined reference to `pthread_join'
userfaultfd.c:(.text+0xe9f): undefined reference to `pthread_cancel'
userfaultfd.c:(.text+0xec6): undefined reference to `pthread_join'
userfaultfd.c:(.text+0xf14): undefined reference to `pthread_join'
/tmp/ccmOkQSM.o: In function `userfaultfd_stress':
userfaultfd.c:(.text+0x13e2): undefined reference to `pthread_attr_setstacksize'
collect2: error: ld returned 1 exit status
This is because the rule for linking .c files to binaries is incorrect.
The first bug is that it uses $< (first prerequisite) instead of $^ (all
preqrequisites), fix it by using ^$.
Secondly the ordering of the prerequisites vs $(LDLIBS) is wrong,
meaning on toolchains that use --as-needed we fail to link (as above).
Fix that by placing $(LDLIBS) *after* ^$.
Finally switch to using the default rule $(LINK.c), so that we get
$(CPPFLAGS) etc. included.
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.