On 06/30/2011 05:57 PM, Michael S. Tsirkin wrote:
Support build on rhel 5.X where we have syscall for eventfd but not userspace wrapper.(cherry-picked from commit 9e3269181e9bc56feb43bcd4e8ce0b82cd543e65 in qemu-kvm.git). Signed-off-by: Michael S. Tsirkin<m...@redhat.com> --- Changes from v1: checkpatch fix address comments by agraf verify we are on linux compat/sys/eventfd.h | 20 ++++++++++++++++++++ configure | 6 ++++-- 2 files changed, 24 insertions(+), 2 deletions(-) create mode 100644 compat/sys/eventfd.h diff --git a/compat/sys/eventfd.h b/compat/sys/eventfd.h new file mode 100644 index 0000000..1801a5f --- /dev/null +++ b/compat/sys/eventfd.h @@ -0,0 +1,20 @@ +#ifndef _COMPAT_SYS_EVENTFD +#define _COMPAT_SYS_EVENTFD + +#ifdef CONFIG_EVENTFD + +#ifndef __linux__ +#error __linux__ is not defined: eventfd is only supported on linux +#endif + +#include<unistd.h> +#include<syscall.h> + +static inline int eventfd(int count, int flags) +{ + return syscall(SYS_eventfd, count, flags); +} + +#endif + +#endif diff --git a/configure b/configure index 856b41e..6f7dd74 100755 --- a/configure +++ b/configure @@ -822,7 +822,6 @@ esac [ -z "$guest_base" ]&& guest_base="$host_guest_base" - default_target_list="" # these targets are portable @@ -891,6 +890,9 @@ sparc64-bsd-user \ " fi +#compat headers +QEMU_CFLAGS="$QEMU_CFLAGS -idirafter $source_path/compat" + if test x"$show_help" = x"yes" ; then cat<< EOF @@ -2122,7 +2124,7 @@ int main(void) return 0; } EOF -if compile_prog "" "" ; then +if compile_prog "-DCONFIG_EVENTFD" "" ; then eventfd=yes fi
Acked-by: Paolo Bonzini <pbonz...@redhat.com> Paolo
