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GLib header files annotate every API with a version number. It is possible to define some constants before including glib.h which will result in useful compile time warnings. Setting GLIB_VERSION_MIN_REQUIRED will result in a warning if libvirt uses an API that was deprecated in the declared version, or before. Such API usage should be rewritten to use the documented new replacement API. Setting GLIB_VERSION_MAX_ALLOWED will result in a warning if libvirt uses an API that was not introduced until a version of GLib that's newer than our minimum declared version. This avoids accidentally using functionality that is not available on some supported platforms. Reviewed-by: Pavel Hrdina <phrdina@redhat.com> Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
62 lines
2.3 KiB
C
62 lines
2.3 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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#ifndef __GNUC__
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# error "Libvirt requires GCC >= 4.8, 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 defined(__clang_major__) && defined(__clang_minor__)
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# ifdef __apple_build_version__
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# if __clang_major__ < 5 || (__clang_major__ == 5 && __clang_minor__ < 1)
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# error You need at least XCode Clang v5.1 to compile QEMU
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# endif
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# else
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# if __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 4)
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# error You need at least Clang v3.4 to compile QEMU
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# endif
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# endif
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#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
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# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
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# error You need at least GCC v4.8 to compile QEMU
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# endif
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#else
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# error You either need at least GCC 4.8 or Clang 3.4 or XCode Clang 5.1 to compile libvirt
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#endif
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/* Ask for warnings for anything that was marked deprecated in
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* the defined version, or before. It is a candidate for rewrite.
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*/
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#define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_48
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/* Ask for warnings if code tries to use function that did not
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* exist in the defined version. These risk breaking builds
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*/
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#define GLIB_VERSION_MAX_ALLOWED GLIB_VERSION_2_48
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