1dnl AX_KERNEL_VERSION(major, minor, level, comparison, action-if-true, action-if-false) 2AC_DEFUN([AX_KERNEL_VERSION], [ 3SAVE_CFLAGS=$CFLAGS 4CFLAGS="-I$KINC -D__KERNEL__ -Werror" 5AC_TRY_COMPILE( 6 [ 7 #include <linux/version.h> 8 ], 9 [ 10 #if LINUX_VERSION_CODE $4 KERNEL_VERSION($1, $2, $3) 11 break_me_hard(\\\); 12 #endif 13 ], 14[$5],[$6],) 15CFLAGS=$SAVE_CFLAGS 16]) 17