1 #ifdef SG_KERNEL_INCLUDES 2 #include "/usr/src/linux/include/scsi/sg.h" 3 #include "/usr/src/linux/include/scsi/scsi.h" 4 #else 5 #ifdef SG_TRICK_GNU_INCLUDES 6 #include <linux/../scsi/sg.h> 7 #include <linux/../scsi/scsi.h> 8 #else 9 #include <scsi/sg.h> 10 #include <scsi/scsi.h> 11 #endif 12 #endif 13 14 /* 15 Getting the correct include files for the sg interface can be an ordeal. 16 In a perfect world, one would just write: 17 #include <scsi/sg.h> 18 #include <scsi/scsi.h> 19 This would include the files found in the /usr/include/scsi directory. 20 Those files are maintained with the GNU library which may or may not 21 agree with the kernel and version of sg driver that is running. Any 22 many cases this will not matter. However in some it might, for example 23 glibc 2.1's include files match the sg driver found in the lk 2.2 24 series. Hence if glibc 2.1 is used with lk 2.4 then the additional 25 sg v3 interface will not be visible. 26 If this is a problem then defining SG_KERNEL_INCLUDES will access the 27 kernel supplied header files (assuming they are in the normal place). 28 The GNU library maintainers and various kernel people don't like 29 this approach (but it does work). 30 The technique selected by defining SG_TRICK_GNU_INCLUDES worked (and 31 was used) prior to glibc 2.2 . Prior to that version /usr/include/linux 32 was a symbolic link to /usr/src/linux/include/linux . 33 34 There are other approaches if this include "mixup" causes pain. These 35 would involve include files being copied or symbolic links being 36 introduced. 37 38 Sorry about the inconvenience. Typically neither SG_KERNEL_INCLUDES 39 nor SG_TRICK_GNU_INCLUDES is defined. 40 41 dpg 20010415 42 */ 43
