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24241c236e
We only ever test libvirt with GCC or CLang which provides a GCC compatible compilation environment. Between them, these compilers cover every important operating system platform, even Windows. Mandate their use to make it explicit that we don't care about compilers like Microsoft VCC or other UNIX vendor C compilers. GCC 4.4 was picked as the baseline, since RHEL-6 ships 4.4.7 and that lets us remove a large set of checks. There is a slight issue that CLang reports itself as GCC 4.2, so we must also check if __clang__ is defined. We could check a particular CLang version too, but that would require someone to figure out a suitable min version which is fun because OS-X reports totally different CLang version numbers from CLang builds on Linux/BSD Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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/*
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* Since virt-login-shell will be setuid, we must do everything
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* we can to avoid linking to other libraries. Many of them do
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* unsafe things in functions marked __atttribute__((constructor)).
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* The only way to avoid such deps is to re-compile the
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* functions with the code in question disabled, and for that we
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* must override the main config.h rules. Hence this file :-(
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*/
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#ifdef LIBVIRT_SETUID_RPC_CLIENT
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# undef HAVE_LIBNL
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# undef HAVE_LIBNL3
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# undef HAVE_LIBSASL2
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# undef HAVE_SYS_ACL_H
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# undef WITH_CAPNG
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# undef WITH_CURL
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# undef WITH_DBUS
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# undef WITH_DEVMAPPER
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# undef WITH_DTRACE_PROBES
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# undef WITH_GNUTLS
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# undef WITH_GNUTLS_GCRYPT
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# undef WITH_LIBSSH
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# undef WITH_MACVTAP
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# undef WITH_NUMACTL
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# undef WITH_SASL
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# undef WITH_SSH2
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# undef WITH_SYSTEMD_DAEMON
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# undef WITH_VIRTUALPORT
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# undef WITH_YAJL
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# undef WITH_YAJL2
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#endif
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/*
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* With the NSS module it's the same story as virt-login-shell. See the
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* explanation above.
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*/
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#ifdef LIBVIRT_NSS
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# undef HAVE_LIBNL
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# undef HAVE_LIBNL3
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# undef HAVE_LIBSASL2
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# undef HAVE_SYS_ACL_H
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# undef WITH_CAPNG
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# undef WITH_CURL
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# undef WITH_DEVMAPPER
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# undef WITH_DTRACE_PROBES
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# undef WITH_GNUTLS
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# undef WITH_GNUTLS_GCRYPT
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# undef WITH_LIBSSH
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# undef WITH_MACVTAP
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# undef WITH_NUMACTL
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# undef WITH_SASL
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# undef WITH_SSH2
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# undef WITH_VIRTUALPORT
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# undef WITH_SECDRIVER_SELINUX
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# undef WITH_SECDRIVER_APPARMOR
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# undef WITH_CAPNG
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#endif /* LIBVIRT_NSS */
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#ifndef __GNUC__
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# error "Libvirt requires GCC >= 4.4, or CLang"
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#endif
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/*
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* Define __GNUC_PREREQ to a sane default if it isn't yet defined.
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* This is done here so that it's included as early as possible; gnulib relies
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* on this to be defined in features.h, which should be included from ctype.h.
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* This doesn't happen on many non-glibc systems.
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* When __GNUC_PREREQ is not defined, gnulib defines it to 0, which breaks things.
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*/
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#ifndef __GNUC_PREREQ
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# define __GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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#endif
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#if !(__GNUC_PREREQ(4, 4) || defined(__clang__))
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# error "Libvirt requires GCC >= 4.4, or CLang"
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#endif
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