config-post.h

   1 /*
   2  * Copyright (C) 2013 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library.  If not, see
  16  * <http://www.gnu.org/licenses/>.
  17  */
  18
  19 /*
  20  * Since virt-login-shell will be setuid, we must do everything
  21  * we can to avoid linking to other libraries. Many of them do
  22  * unsafe things in functions marked __attribute__((constructor)).
  23  * The only way to avoid such deps is to re-compile the
  24  * functions with the code in question disabled, and for that we
  25  * must override the main config.h rules. Hence this file :-(
  26  */
  27
  28 #ifdef LIBVIRT_SETUID_RPC_CLIENT
  29 # undef HAVE_LIBNL
  30 # undef HAVE_LIBNL3
  31 # undef HAVE_LIBSASL2
  32 # undef HAVE_SYS_ACL_H
  33 # undef WITH_CAPNG
  34 # undef WITH_CURL
  35 # undef WITH_DBUS
  36 # undef WITH_DEVMAPPER
  37 # undef WITH_DTRACE_PROBES
  38 # undef WITH_GNUTLS
  39 # undef WITH_LIBSSH
  40 # undef WITH_MACVTAP
  41 # undef WITH_NUMACTL
  42 # undef WITH_SASL
  43 # undef WITH_SSH2
  44 # undef WITH_SYSTEMD_DAEMON
  45 # undef WITH_VIRTUALPORT
  46 # undef WITH_YAJL
  47 #endif
  48
  49 /*
  50  * With the NSS module it's the same story as virt-login-shell. See the
  51  * explanation above.
  52  */
  53 #ifdef LIBVIRT_NSS
  54 # undef HAVE_LIBNL
  55 # undef HAVE_LIBNL3
  56 # undef HAVE_LIBSASL2
  57 # undef HAVE_SYS_ACL_H
  58 # undef WITH_CAPNG
  59 # undef WITH_CURL
  60 # undef WITH_DEVMAPPER
  61 # undef WITH_DTRACE_PROBES
  62 # undef WITH_GNUTLS
  63 # undef WITH_LIBSSH
  64 # undef WITH_MACVTAP
  65 # undef WITH_NUMACTL
  66 # undef WITH_SASL
  67 # undef WITH_SSH2
  68 # undef WITH_VIRTUALPORT
  69 # undef WITH_SECDRIVER_SELINUX
  70 # undef WITH_SECDRIVER_APPARMOR
  71 #endif /* LIBVIRT_NSS */
  72
  73 #ifndef __GNUC__
  74 # error "Libvirt requires GCC >= 4.4, or CLang"
  75 #endif
  76
  77 /*
  78  * Define __GNUC_PREREQ to a sane default if it isn't yet defined.
  79  * This is done here so that it's included as early as possible; gnulib relies
  80  * on this to be defined in features.h, which should be included from ctype.h.
  81  * This doesn't happen on many non-glibc systems.
  82  * When __GNUC_PREREQ is not defined, gnulib defines it to 0, which breaks things.
  83  */
  84 #ifndef __GNUC_PREREQ
  85 # define __GNUC_PREREQ(maj, min) \
  86     ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  87 #endif
  88
  89 #if !(__GNUC_PREREQ(4, 4) || defined(__clang__))
  90 # error "Libvirt requires GCC >= 4.4, or CLang"
  91 #endif