On 2019-09-20 10:24 -0500, Segher Boessenkool wrote: > [ Please don't top-post. ] > > On Fri, Sep 20, 2019 at 06:16:45PM +0300, Vassilena Treneva wrote: > > On Fri, Sep 20, 2019 at 1:58 PM Segher Boessenkool < > > segher@xxxxxxxxxxxxxxxxxxx> wrote: > > > On Fri, Sep 20, 2019 at 01:42:21PM +0300, Vassilena Treneva wrote: > > > > I am using the same versions of gcc-c++ and glibc (gcc-c++ 4.8.5 & glibc > > > > 2.17) on RHEL7 and CENTOS7, but I get a compile time error ONLY on > > > CENTOS7: > > > > /usr/bin/ld: CMakeFiles/GTest.Test.dir/gtest/gtest-all.cc.o: *undefined > > > > reference to symbol 'pthread_key_delete@@GLIBC_2.2.5'* > > > > //usr/lib64/libpthread.so.0: > > > > *error adding symbols: DSO missing from command line* > > > > > > It says you should have -lpthread on your link command line. Do you? > > > > Yes, I think I have the proper flag added. > > > > CMAKE file looks like this: > > > > SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror=maybe-uninitialized > > -std=gnu++0x --coverage -fprofile-arcs -ftest-coverage -lpthread") > > But does it show up on the link command line, and where? What actual > command is run? > > Maybe you should ask this question on some CMake list or forum? I guess CMAKE_CXX_LINK_FLAGS need to be set to include -pthread. I always find cmake difficult to be used :(. -- Xi Ruoyao <xry111@xxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University