boris@zeus:~/gl-cairo-cube$ make
gcc -Wall -c -O3 `pkg-config --cflags gtkglext-1.0` -c geometry.c -o geometry.o
Package gtkglext-1.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtkglext-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtkglext-1.0' found
In file included from geometry.c:15:
geometry.h:18:21: error: gtk/gtk.h: No such file or directory
In file included from geometry.c:15:
geometry.h:22: error: syntax error before 'gdouble'
geometry.h:22: warning: no semicolon at end of struct or union
geometry.h:23: warning: type defaults to 'int' in declaration of 'fY'
geometry.h:23: warning: data definition has no type or storage class
geometry.h:24: error: syntax error before 'bGrowX'
geometry.h:24: warning: type defaults to 'int' in declaration of 'bGrowX'
geometry.h:24: warning: data definition has no type or storage class
geometry.h:25: error: syntax error before 'bGrowY'
geometry.h:25: warning: type defaults to 'int' in declaration of 'bGrowY'
geometry.h:25: warning: data definition has no type or storage class
geometry.h:26: error: syntax error before 'fStepX'
geometry.h:26: warning: type defaults to 'int' in declaration of 'fStepX'