$ gnatmake -P globe_3d_gps_linux.gpr  
gnatbind -E -I- -x /home/oenone/src/Ada/globe3d/obj/gnatdebg/globe_3d_demo.ali
gnatlink /home/oenone/src/Ada/globe3d/obj/gnatdebg/globe_3d_demo.ali -g -lGLU -lGL -lglut -L/usr/local/lib -L/usr/X11R6/lib -lX11 -lXi -lXmu -lXext -lm -o /home/oenone/src/Ada/globe3d/demo/globe_3d_demo
/usr/X11R6/lib/libGLU.so.7.0: warning: strcpy() is almost always misused, please use strlcpy()
/usr/X11R6/lib/libGL.so.6.0: warning: sprintf() is often misused, please use snprintf()
/usr/X11R6/lib/libX11.so.11.1: warning: strcat() is almost always misused, please use strlcat()
/home/oenone/src/Ada/globe3d/obj/gnatdebg/glut-windows.o(.text+0x3dcf): In function `glut__windows__current_window':
/home/oenone/src/Ada/globe3d/src/glut-windows.adb:63: undefined reference to `glutGetWindowData'
/home/oenone/src/Ada/globe3d/obj/gnatdebg/glut-windows.o(.text+0x9d57): In function `glut__windows__start_gluts':
/home/oenone/src/Ada/globe3d/src/glut-windows.adb:686: undefined reference to `glutCloseFunc'
/home/oenone/src/Ada/globe3d/obj/gnatdebg/glut-windows.o(.text+0x9d88):/home/oenone/src/Ada/globe3d/src/glut-windows.adb:689: undefined reference to `glutSetWindowData'
/home/oenone/src/Ada/globe3d/obj/gnatdebg/glut-windows.o(.text+0x9fc5): In function `glut__windows__initialize':
/home/oenone/src/Ada/globe3d/src/glut-windows.adb:741: undefined reference to `glutSetOption'
/home/oenone/src/Ada/globe3d/obj/gnatdebg/glut-windows.o(.text+0x9fd7):/home/oenone/src/Ada/globe3d/src/glut-windows.adb:742: undefined reference to `glutSetOption'
/home/oenone/src/Ada/globe3d/obj/gnatdebg/glut-devices.o(.text+0x1f5): In function `glut__devices__current_window':
/home/oenone/src/Ada/globe3d/src/glut-devices.adb:22: undefined reference to `glutGetWindowData'
/home/oenone/src/Ada/globe3d/obj/gnatdebg/globe_3d_demo.o(.text+0x988c): In function `globe_3d_demo__say_bye_to_glut':
/home/oenone/src/Ada/globe3d/demo/globe_3d_demo.adb:177: undefined reference to `glutLeaveMainLoop'
collect2: ld returned 1 exit status
gnatlink: error when calling /usr/local/bin/gnatgcc
gnatmake: *** link failed.