CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #define _GNU_SOURCE
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)

CHECK_C_SOURCE_RUNS(
  "
  #ifndef _GNU_SOURCE
  #define _GNU_SOURCE
  #endif
  #include <fcntl.h>
  #include <linux/falloc.h>
  int main()
  {
    /* Ignore the return value for now. Check if the flags exist.
    The return value is checked  at runtime. */
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);

    return(0);
  }"
  HAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE
  )

ADD_DEFINITIONS(-DHAVE_FALLOC_PUNCH_HOLE_AND_KEEP_SIZE=1)