From: Alexander Turenko <alexander.turenko@tarantool.org> To: "Alexander V. Tikhonov" <avtikhon@tarantool.org> Cc: tarantool-patches@dev.tarantool.org Subject: Re: [Tarantool-patches] [PATCH v1] build: fix unit tests build with lrt Date: Thu, 28 Nov 2019 19:41:47 +0300 [thread overview] Message-ID: <20191128164146.7kmvbyd24fmuifei@tkn_work_nb> (raw) In-Reply-To: <2697bfced492ce88fc91d8d9dc1e2f1a68c7f147.1574430214.git.avtikhon@tarantool.org> fiber.cc now uses clock_getttime(), which requires -lrt with glibc prior 2.1. Let's add librt dependency for core library for glibc of those versions. We should check for glibc version (using __GLIBC__ and __GLIBC_MINOR__ macros) or perform a check whether we able to use clock_gettime() w/o librt. So the patch should look like this: | diff --git a/CMakeLists.txt b/CMakeLists.txt | index 7d6c084..ca968eb 100644 | --- a/CMakeLists.txt | +++ b/CMakeLists.txt | @@ -116,6 +116,12 @@ else () | set(HAVE_CLOCK_GETTIME ${HAVE_CLOCK_GETTIME_DECL}) | endif () | set(CMAKE_REQUIRED_LIBRARIES "") | +# According to `man 2 clockgettime` the glibc wrapper requires | +# -lrt on glibc versions before 2.17. We need to check whether | +# the function is available without -lrt to set this linker option | +# conditionally. | +check_function_exists(clock_gettime HAVE_CLOCK_GETTIME_WITHOUT_RT) | + | check_symbol_exists(__get_cpuid cpuid.h HAVE_CPUID) | | # Checks for libev | diff --git a/src/lib/core/CMakeLists.txt b/src/lib/core/CMakeLists.txt | index e60b519..72e631b 100644 | --- a/src/lib/core/CMakeLists.txt | +++ b/src/lib/core/CMakeLists.txt | @@ -46,3 +46,11 @@ target_link_libraries(core salad small uri decNumber ${LIBEV_LIBRARIES} | if (ENABLE_BACKTRACE AND NOT TARGET_OS_DARWIN) | target_link_libraries(core gcc_s ${UNWIND_LIBRARIES}) | endif() | + | +# Since fiber.top() introduction, fiber.cc, which is part of core | +# library, depends on clock_gettime() syscall, so we should set | +# -lrt when it is appropriate. See a comment for | +# HAVE_CLOCK_GETTIME_WITHOUT_RT in ${REPO}/CMakeLists.txt. | +if ("${HAVE_CLOCK_GETTIME}" AND NOT "${HAVE_CLOCK_GETTIME_WITHOUT_RT}") | + target_link_libraries(core rt) | +endif() CCed Serge as author of the patch that introduces the regression. Serge, it seems we should disable fiber.top() or give explicit error when HAVE_CLOCK_GETTIME is false. WBR, Alexander Turenko. On Fri, Nov 22, 2019 at 04:51:38PM +0300, Alexander V. Tikhonov wrote: > After the commit 77fa45bd05f8cdd4c0f9bad85185ef5b61528d49 Please, use format commit_hash ('commit message header'). > the unit tests builds failed like: > > /opt/rh/devtoolset-6/root/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/ld: > ../../src/lib/core/libcore.a(fiber.c.o): undefined reference to symbol > 'clock_gettime@@GLIBC_2.2.5' > //lib64/librt.so.1: error adding symbols: DSO missing from command line > collect2: error: ld returned 1 exit status > test/unit/CMakeFiles/cbus.test.dir/build.make:108: recipe for target > 'test/unit/cbus.test' failed > make[2]: *** [test/unit/cbus.test] Error 1 > > To fix the issue the 'rt' library was added to test unit cmake file only > for linux and freebsd targets. It is glibc flaw, no need to change something on FreeBSD. > > Close #4639 > --- > > Github: https://github.com/tarantool/tarantool/tree/avtikhon/gh-4639-lrt-unit-tests-full-ci > Issue: https://github.com/tarantool/tarantool/issues/4639
next prev parent reply other threads:[~2019-11-28 16:41 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-22 13:51 Alexander V. Tikhonov 2019-11-28 16:41 ` Alexander Turenko [this message] 2019-11-29 7:12 ` Alexander Tikhonov -- strict thread matches above, loose matches on Subject: below -- 2019-11-29 7:05 Alexander V. Tikhonov 2019-11-22 11:39 Alexander V. Tikhonov
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