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build: skip lxc with too-old glibc

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Since we already require the kernel to be new enough to support
LO_FLAGS_AUTOCLEAR, we might as well also require glibc to be
new enough to support epoll_create1().

* configure.ac (with_lxc): We require glibc 2.9 for LXC.
Reported and tested by Philipp Hahn.
This commit is contained in:
Eric Blake 2012-01-19 13:35:39 -07:00
parent 549cedc6a9
commit 4c18acffd7
1 changed files with 4 additions and 3 deletions
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7
configure.ac
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@ -734,16 +734,17 @@ if test "$with_lxc" = "yes" || test "$with_lxc" = "check"; then
AC_TRY_LINK([
#include <sched.h>
#include <linux/loop.h>
#include <sys/epoll.h>
], [
unshare (!LO_FLAGS_AUTOCLEAR);
unshare (!(LO_FLAGS_AUTOCLEAR + EPOLL_CLOEXEC));
], [
with_lxc=yes
], [
if test "$with_lxc" = "check"; then
with_lxc=no
AC_MSG_NOTICE([Function unshare() not present in <sched.h> header but required for LXC driver, disabling it])
AC_MSG_NOTICE([Required kernel features were not found, disabling LXC])
else
AC_MSG_ERROR([Function unshare() not present in <sched.h> header, but required for LXC driver])
AC_MSG_ERROR([Required kernel features for LXC were not found])
fi
])
fi