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build: probe for glib-2 library in configure

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Prepare for linking with glib by probing for it at configure
time. Per supported platforms target, the min glib versions on
relevant distros are:

  RHEL-8: 2.56.1
  RHEL-7: 2.50.3
  Debian (Buster): 2.58.3
  Debian (Stretch): 2.50.3
  OpenBSD (Ports): 2.58.3
  FreeBSD (Ports): 2.56.3
  OpenSUSE Leap 15: 2.54.3
  SLE12-SP2: 2.48.2
  Ubuntu (Xenial): 2.48.0
  macOS (Homebrew): 2.56.0

This suggests that a minimum glib of 2.48 is a reasonable target.
This aligns with the minimum version required by qemu too.

We must disable the bad-function-cast warning as various GLib APIs
and macros will trigger this.

Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé
2019-10-14 10:54:42 +01:00
parent 36138eaecf
commit 58e7c9bc05
6 changed files with 44 additions and 0 deletions
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m4/virt-compile-warnings.m4
+2
View File
@@ -67,6 +67,8 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
# > to handle the code effectively.
# Source: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
dontwarn="$dontwarn -Wdisabled-optimization"
# Various valid glib APIs/macros trigger this warning
dontwarn="$dontwarn -Wbad-function-cast"
# Broken in 6.0 and later
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69602
m4/virt-glib.m4
+36
View File
@@ -0,0 +1,36 @@
dnl The glib.so library
dnl
dnl Copyright (C) 2016 Red Hat, Inc.
dnl
dnl This library is free software; you can redistribute it and/or
dnl modify it under the terms of the GNU Lesser General Public
dnl License as published by the Free Software Foundation; either
dnl version 2.1 of the License, or (at your option) any later version.
dnl
dnl This library is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl Lesser General Public License for more details.
dnl
dnl You should have received a copy of the GNU Lesser General Public
dnl License along with this library. If not, see
dnl <http://www.gnu.org/licenses/>.
dnl
AC_DEFUN([LIBVIRT_ARG_GLIB], [
LIBVIRT_ARG_WITH([GLIB], [glib-2.0 location], [check])
])
AC_DEFUN([LIBVIRT_CHECK_GLIB],[
GLIB_REQUIRED=2.48.0
LIBVIRT_CHECK_PKG([GLIB], [glib-2.0], [$GLIB_REQUIRED])
if test "$with_glib" = "no" ; then
AC_MSG_ERROR([glib-2.0 >= $GLIB_REQUIRED is required for libvirt])
fi
])
AC_DEFUN([LIBVIRT_RESULT_GLIB], [
LIBVIRT_RESULT_LIB([GLIB])
])