Re: [Qemu-devel] Switch to thread pool from posix-aio

[Anthony Liguori]

Blue Swirl wrote:
> On 12/12/08, Anthony Liguori <address@hidden> wrote:
>   
> > I've just committed the thread pool patch I posted a few days ago (plus the
> > suggested cleanups).
> >
> >  Please test this especially if you're using a very old glibc or a non-Linux
> > Unix.  Also pay attention for any performance differences.  I don't think
> > any will be noticable unless you're doing very heavy IO and I expect it will
> > only improve things.
> >     
>
> Compilation is broken on Debian stable, you need librt for
> timer_create, clock_gettime etc.
>   

Does this patch fix your problem?

Regards,

Anthony Liguori

diff --git a/configure b/configure
index d1f0c04..e997a32 100755
--- a/configure
+++ b/configure
@@ -972,6 +972,26 @@ if [ -x "`which texi2html 2>/dev/null`" ] && \
   build_docs="yes"
 fi
 
+##########################################
+# Do we need librt
+cat > $TMPC <<EOF
+#include <signal.h>
+#include <time.h>
+int main(void) { clockid_t id; return clock_gettime(id, NULL); }
+EOF
+
+rt=no
+if $cc $ARCH_CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
+  :
+elif $cc $ARCH_CFLAGS -o $TMPE $TMPC -lrt 2> /dev/null ; then
+  rt=yes
+fi
+
+if test "$rt" = "yes" ; then
+  # Hack, we should have a general purpose LIBS for this sort of thing
+  AIOLIBS="$AIOLIBS -lrt"
+fi
+
 if test "$mingw32" = "yes" ; then
   if test -z "$prefix" ; then
       prefix="c:\\\\Program Files\\\\Qemu"