bugs

[Kristian Söderblom]

Hi.
        I'm wondering why checking for X11 extension headers causes these
warnings (the macro used was AC_CHECK_HEADERS):


checking X11/extensions/Xdbe.h usability... no
checking X11/extensions/Xdbe.h presence... yes
configure: WARNING: X11/extensions/Xdbe.h: present but cannot be compiled
configure: WARNING: X11/extensions/Xdbe.h: check for missing prerequisite
headers?
configure: WARNING: X11/extensions/Xdbe.h: proceeding with the
preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for X11/extensions/Xdbe.h... yes
checking X11/extensions/multibuf.h usability... no
checking X11/extensions/multibuf.h presence... yes
configure: WARNING: X11/extensions/multibuf.h: present but cannot be
compiled
configure: WARNING: X11/extensions/multibuf.h: check for missing
prerequisite headers?
configure: WARNING: X11/extensions/multibuf.h: proceeding with the
preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##


--
Kristian Söderblom