[ERROR] configure: error

[way]

hi all
i'm very sorry.i think this is a newbie  problem,but i want slove it.
if i fellow [Building wayland -> Wayland applications] guide in web site get
this configure: error

......
checking whether the gcc linker (/usr/bin/ld) supports shared libraries...
yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for dlopen... no
checking for dlopen in -ldl... yes
checking for COMPOSITOR... no  <==========mebe has problem
configure: error: Package requirements (wayland-server egl >= 7.10 glesv2
pixman-1 libpng) were not met:

No package 'egl' found
No package 'glesv2' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables COMPOSITOR_CFLAGS
and COMPOSITOR_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.


Other steps is finish but can't configure application.
maybe a new version proble,but i can't slove it .

i'm very sorry but ,i want play some wayland demo.

THX!!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/wayland-devel/attachments/20111026/3e0a5f5d/attachment.htm>