Hi, <div><br></div><div>I think there is a problem in the latest commit to the branch 1.5. When opal_setup_libevent.m4 is upgraded to autotools 1.5.5 the square brackets in the test C code should be replaced too. Otherwise they&#39;ll go unchanged to the configure file. And the C program which tests for epoll support will fail:</div>
<div><br></div><div>...</div><div><div>configure:159404: checking for working epoll system call</div><div>configure:159455: gcc -o conftest -DNDEBUG -g -O2   -I/hpc/home/USERS/senina/projects/hg/shmem-dev/opal/mca/hwloc/hwloc131/hwloc/include -I/hpc/home/USERS/senina/projects/distribs/valgrind-3.7.0/install/include   -I/usr/include/infiniband -I/usr/include/infiniband    conftest.c -lrt -lnsl  -lutil -lm  &gt;&amp;5</div>
<div>conftest.c: In function &#39;main&#39;:</div><div>conftest.c:725: error: expected expression before &#39;[&#39; token</div><div>conftest.c:729: error: expected expression before &#39;[&#39; token</div><div>conftest.c:737: error: expected expression before &#39;[&#39; token</div>
<div>configure:159455: $? = 1</div><div>configure: program exited with status 1</div><div>configure: failed program was:</div></div><div>...</div><div><br></div><div>So</div><div>     int fildes[[2]];</div><div>and similar </div>
<div>should be replaced to </div><div>    int fildes[2];</div><div><br></div><div>I&#39;ve attached a diff file which worked for me. </div><div><br></div><div>Regards, </div><div>Andrew Senin</div>