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build: hoist system-specific checks before library checks

Browse Source 
Commit f92c7e3 fixed a regression for native builds, but introduced
a regression for cross-compilation builds; in particular,
./autobuild.sh on a Fedora system with mingw cross-compiler fails
with:

checking for qemu-kvm... /usr/bin/qemu-kvm
checking for yajl_parse_complete in -lyajl... no
checking for yajl_tree_parse in -lyajl... no
configure: error: You must install the libyajl library & headers to compile libvirt

Since we default $with_qemu to 'yes' rather than 'check', and then
flip that default based on platform-specific checks, those platform
specifics need to come prior to any library checks that depend on
the value of $with_qemu.

* configure.ac: Ensure system defaults are sane before checking
for things that make decisions based on system default.

Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2013-09-17 10:25:42 -06:00
parent ceaa536d49
commit 0e1f012c1d
1 changed files with 44 additions and 41 deletions
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85
configure.ac
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@ -160,6 +160,50 @@ VERSION_SCRIPT_FLAGS=-Wl,--version-script=
VERSION_SCRIPT_FLAGS="-Wl,-M -Wl,"
AC_MSG_RESULT([$VERSION_SCRIPT_FLAGS])
dnl Specify if we rely on ifconfig instead of iproute2 (e.g. in case
dnl we're working on BSD)
want_ifconfig=no
dnl Make some notes about which OS we're compiling for, as the lxc and qemu
dnl drivers require linux headers, and storage_mpath, dtrace, and nwfilter
dnl are also linux specific. The "network" and storage_fs drivers are known
dnl to not work on MacOS X presently, so we also make a note if compiling
dnl for that
with_linux=no with_osx=no with_freebsd=no
case $host in
*-*-linux*) with_linux=yes ;;
*-*-darwin*) with_osx=yes ;;
*-*-freebsd*) with_freebsd=yes ;;
esac
if test $with_linux = no; then
if test "x$with_lxc" != xyes
then
with_lxc=no
fi
with_dtrace=no
fi
if test $with_freebsd = yes; then
want_ifconfig=yes
with_firewalld=no
fi
if test $with_osx = yes; then
with_qemu=no
fi
AM_CONDITIONAL([WITH_LINUX], [test "$with_linux" = "yes"])
AM_CONDITIONAL([WITH_FREEBSD], [test "$with_freebsd" = "yes"])
if test "$with_libvirtd" = "no" ; then
with_qemu=no
fi
# Check for compiler and library settings.
LIBVIRT_COMPILE_WARNINGS
LIBVIRT_COMPILE_PIE
LIBVIRT_LINKER_RELRO
@ -391,44 +435,6 @@ if test "$prefix" = "/usr" && test "$sysconfdir" = '${prefix}/etc' ; then
sysconfdir='/etc'
fi
dnl Specify if we rely on ifconfig instead of iproute2 (e.g. in case
dnl we're working on BSD)
want_ifconfig=no
dnl Make some notes about which OS we're compiling for, as the lxc and qemu
dnl drivers require linux headers, and storage_mpath, dtrace, and nwfilter
dnl are also linux specific. The "network" and storage_fs drivers are known
dnl to not work on MacOS X presently, so we also make a note if compiling
dnl for that
with_linux=no with_osx=no with_freebsd=no
case $host in
*-*-linux*) with_linux=yes ;;
*-*-darwin*) with_osx=yes ;;
*-*-freebsd*) with_freebsd=yes ;;
esac
if test $with_linux = no; then
if test "x$with_lxc" != xyes
then
with_lxc=no
fi
with_dtrace=no
fi
if test $with_freebsd = yes; then
want_ifconfig=yes
with_firewalld=no
fi
if test $with_osx = yes; then
with_qemu=no
fi
AM_CONDITIONAL([WITH_LINUX], [test "$with_linux" = "yes"])
AM_CONDITIONAL([WITH_FREEBSD], [test "$with_freebsd" = "yes"])
dnl Allow to build without Xen, QEMU/KVM, test or remote driver
AC_ARG_WITH([xen],
[AS_HELP_STRING([--with-xen],
@ -721,9 +727,6 @@ if test "x$with_vbox" = "xyes"; then
fi
AM_CONDITIONAL([WITH_VBOX], [test "$with_vbox" = "yes"])
if test "$with_libvirtd" = "no" ; then
with_qemu=no
fi
if test "$with_qemu" = "yes" ; then
AC_DEFINE_UNQUOTED([WITH_QEMU], 1, [whether QEMU driver is enabled])
fi