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Wed, 16 Jan 2019 04:27:39 -0800

I've made all sem_timedwait work. One of the libraries was missing *pthread*
linkage but was linked to a process that links to pthread itself. Message

> undefined reference to symbol 'sem_timedwait@@GLIBC_2.2'
>
was not shown in the project. But it is shown it the test case if I remove
pthread linkage.

The problem occurs only when using semaphores in a library that is not
linked against pthread.

I've prepared minimal test suite using cmake (ctest) and Check framework.
The test reproduces the problem if linkage with pthread of the library is
commented out (by default). Test has the same behaviour as without separate
library with ASAN enabled. Behaviour is the same compiled either with gcc,
clang-3.9 or clang-6.0.

Test passes on amd64 distibutions and on Ubuntu Trusty i386 (with no
pthread linkage). But it fails on Debian 9 (Stretch) i386 and Debian 10
(Testing) i386. No compilation errors happen.

Command to run test in the test-bugs directory after extraction:
cmake --build . && ctest --verbose

Attachment: test-bugs.tar.gz
Description: application/gzip

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