Re: [Qemu-devel] [PATCH] configure: correctly define PTHREAD_LIB

[Daniel P. Berrange]

On Fri, Sep 29, 2017 at 03:52:34PM +0300, Alexey Perevalov wrote:
> On 09/29/2017 01:40 PM, Daniel P. Berrange wrote:
> > On Fri, Sep 29, 2017 at 01:11:14PM +0300, Alexey Perevalov wrote:
> > > In case of -pthread already exists in QEMU_CFLAGS,
> > > compilation of sample pthread program successed,
> > > but -pthread is not putting into PTHREAD_LIBS in this case.
> > > PTHREAD_LIB is using while compiling tests/migration/stress.
> > > 
> > > Signed-off-by: Alexey Perevalov <address@hidden>
> > > ---
> > >   configure | 1 +
> > >   1 file changed, 1 insertion(+)
> > > 
> > > diff --git a/configure b/configure
> > > index 6587e80..a2dd044 100755
> > > --- a/configure
> > > +++ b/configure
> > > @@ -3359,6 +3359,7 @@ int main(void) {
> > >   EOF
> > >   if compile_prog "" "" ; then
> > >     pthread=yes
> > > +  PTHREAD_LIB="-pthread"
> > >   else
> > >     for pthread_lib in $PTHREADLIBS_LIST; do
> > >       if compile_prog "" "$pthread_lib" ; then
> > We shouldn't do this because it affects whole of QEMU. The stress program
> > needs -lpthread because it is linking statically, so just add it to the
> > Makefile rule for building stress.
> ok, but I didn't find any explicit usage of PTHREAD_LIB,
> and avoiding it in Makefile I think will make PTHREAD_LIB
> redundant.

Oh yeah, actually PTHREAD_LIB is a variable i introduced specifically
for the stress program, so my comment above is wrong and I think your
patch is ok.


Regards,
Daniel
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