WARNING: GL/glext.h: present but cannot be compiled

[Nathan Collier]

Reporting a bug which the configure command prompted me to do.

checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking how to run the C preprocessor... gcc -E
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking how to run the C++ preprocessor... g++ -E
checking for ranlib... ranlib
checking for rm... /bin/rm
checking for fltk-config... :
checking for sqrt in -lm... yes
checking for zlibVersion in -lz... yes
checking for jpeg_start_compress in -ljpeg... yes
checking for TIFFOpen in -ltiff... yes
checking for png_read_image in -lpng... yes
checking for X... libraries /usr/lib64, headers
checking for gethostbyname... yes
checking for connect... yes
checking for remove... yes
checking for shmat... yes
checking for IceConnectionNumber in -lICE... yes
checking for glBegin in -lGL... yes
checking for glPolygonOffset... yes
checking for glPolygonOffsetEXT... no
checking for FLTK library... no
checking for FLTK GL support... no
checking for egrep... grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking for unistd.h... (cached) yes
checking GL/glext.h usability... no
checking GL/glext.h presence... yes
configure: WARNING: GL/glext.h: present but cannot be compiled
configure: WARNING: GL/glext.h: check for missing prerequisite headers?
configure: WARNING: GL/glext.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for GL/glext.h... yes
checking GL/glxext.h usability... no
checking GL/glxext.h presence... yes
configure: WARNING: GL/glxext.h: present but cannot be compiled
configure: WARNING: GL/glxext.h: check for missing prerequisite headers?
configure: WARNING: GL/glxext.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for GL/glxext.h... yes
checking GL/wglext.h usability... no
checking GL/wglext.h presence... no
checking for GL/wglext.h... no
checking hash_map usability... no
checking hash_map presence... no
checking for hash_map... no
checking hash_set usability... no
checking hash_set presence... no
checking for hash_set... no
checking ext/hash_map usability... yes
checking ext/hash_map presence... yes
checking for ext/hash_map... yes
checking ext/hash_set usability... yes
checking ext/hash_set presence... yes
checking for ext/hash_set... yes
checking valarray usability... yes
checking valarray presence... yes
checking for valarray... yes
checking sstream usability... yes
checking sstream presence... yes
checking for sstream... yes
checking strstream usability... yes
checking strstream presence... yes
checking for strstream... yes
checking for an ANSI C-conforming const... yes
checking for inline... inline
checking for type bool... yes
checking for working alloca.h... yes
checking for alloca... yes
checking for rint... yes
checking for getrusage... yes
checking for times... yes
checking for random... no
checking for getopt... yes
checking for getopt_long... yes
configure: creating ./config.status
config.status: creating gfx-config
config.status: creating include/gfx/config.h
config.status: include/gfx/config.h is unchanged


-- 
Nathaniel Collier
http://www.eng.usf.edu/~ncollier/
"It is not who is right, but what is right, that is of importance."