When trying to test PR2107 on OpenBSD-6 I was blocked by the following error, which is also present in 'master'.
../../../ompi/opal/util/if.c: In function 'opal_ifisloopback': ../../../ompi/opal/util/if.c:710: error: 'IFF_LOOPBACK' undeclared (first use in this function) ../../../ompi/opal/util/if.c:710: error: (Each undeclared identifier is reported only once ../../../ompi/opal/util/if.c:710: error: for each function it appears in.) ../../../ompi/opal/util/if.c: In function 'opal_ifgetaliases': ../../../ompi/opal/util/if.c:791: error: 'IFF_LOOPBACK' undeclared (first use in this function) The constant IFF_LOOPBACK is defined in net/if.h, as expected. However, opal_config.h says: /* #undef HAVE_NET_IF_H */ Related to that is the following output from configure: checking net/if.h usability... no checking net/if.h presence... yes configure: WARNING: net/if.h: present but cannot be compiled configure: WARNING: net/if.h: check for missing prerequisite headers? configure: WARNING: net/if.h: see the Autoconf documentation configure: WARNING: net/if.h: section "Present But Cannot Be Compiled" configure: WARNING: net/if.h: proceeding with the compiler's result configure: WARNING: ## ------------------------------------------------------ ## configure: WARNING: ## Report this to http://www.open-mpi.org/community/help/ ## configure: WARNING: ## ------------------------------------------------------ ## checking for net/if.h... no Details from config.log: configure:62402: checking net/if.h usability configure:62402: gcc -std=gnu99 -c -O3 -DNDEBUG -finline-functions -fno-strict-aliasing conftest.c >&5 In file included from conftest.c:433: /usr/include/net/if.h:358: error: field 'ifru_addr' has incomplete type /usr/include/net/if.h:359: error: field 'ifru_dstaddr' has incomplete type /usr/include/net/if.h:360: error: field 'ifru_broadaddr' has incomplete type /usr/include/net/if.h:387: error: field 'ifrau_addr' has incomplete type /usr/include/net/if.h:393: error: field 'ifra_dstaddr' has incomplete type /usr/include/net/if.h:395: error: field 'ifra_mask' has incomplete type /usr/include/net/if.h:438: error: field 'addr' has incomplete type /usr/include/net/if.h:439: error: field 'dstaddr' has incomplete type /usr/include/net/if.h:445: error: expected specifier-qualifier-list before 'sa_family_t' In file included from /usr/include/net/if.h:454, from conftest.c:433: /usr/include/net/if_arp.h:79: error: field 'arp_pa' has incomplete type /usr/include/net/if_arp.h:80: error: field 'arp_ha' has incomplete type Man page for if_nametoindex() and friends show: #include <sys/types.h> #include <sys/socket.h> #include <net/if.h> It looks like configure.ac is *trying* to deal with the sys/socket.h dependency: # Needed to work around Darwin requiring sys/socket.h for # net/if.h AC_CHECK_HEADERS([net/if.h], [], [], [#include <stdio.h> #if STDC_HEADERS # include <stdlib.h> # include <stddef.h> #else # if HAVE_STDLIB_H # include <stdlib.h> # endif #endif #if HAVE_SYS_SOCKET_H # include <sys/socket.h> #endif ]) However, config.log suggests that the previous failure has been cached, making this (second) test for net/if.h a no-op: configure:62453: checking for net/if.h configure:62453: result: no -Paul -- Paul H. Hargrove phhargr...@lbl.gov Computer Languages & Systems Software (CLaSS) Group Computer Science Department Tel: +1-510-495-2352 Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
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