/usr/lib/libglapi.la: No such file or directory

Hello,

When I try to compile mesa-demos-8.1.0 I got this:
$ ./configure --prefix=/usr
$ make
[...]
Making all in src
make[1]: Entering directory `/home/yugiohjcj/documents/downloads/software/mesa-demos-8.1.0/src'
Making all in util
make[2]: Entering directory `/home/yugiohjcj/documents/downloads/software/mesa-demos-8.1.0/src/util'
  CC       readtex.lo
  CC       showbuffer.lo
  CC       shaderutil.lo
  CCLD     libutil.la
/bin/grep: /usr/lib/libglapi.la: No such file or directory
/bin/sed: can't read /usr/lib/libglapi.la: No such file or directory
libtool: link: `/usr/lib/libglapi.la' is not a valid libtool archive
make[2]: *** [libutil.la] Error 1
make[2]: Leaving directory `/home/yugiohjcj/documents/downloads/software/mesa-demos-8.1.0/src/util'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/yugiohjcj/documents/downloads/software/mesa-demos-8.1.0/src'
make: *** [all-recursive] Error 1

So, I see /usr/lib/libglapi.la is missing.
I recompile MesaLib-8.0.4 like this:
$ ./configure --prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --mandir=/usr/man --docdir=/usr/doc/mesa-8.0.4 --with-dri-driverdir=/usr/lib/xorg/modules/dri --with-dri-drivers="i915,i965" --enable-shared-glapi
$ make
Then I install it.

But the problem with mesa-demos-8.1.0 remains.
The /usr/lib/libglapi.la file is not available.

Do you have any idea how to resolve this problem ?

Thank you.
Best regards.