support/scripts/check-kernel-headers.sh

   1 #!/bin/sh
   2
   3 SYSROOT="${1}"
   4 # Make sure we have enough version components
   5 HDR_VER="${2}.0.0"
   6
   7 HDR_M="${HDR_VER%%.*}"
   8 HDR_V="${HDR_VER#*.}"
   9 HDR_m="${HDR_V%%.*}"
  10
  11 EXEC="$(mktemp -t check-headers.XXXXXX)"
  12
  13 # We do not want to account for the patch-level, since headers are
  14 # not supposed to change for different patchlevels, so we mask it out.
  15 # This only applies to kernels >= 3.0, but those are the only one
  16 # we actually care about; we treat all 2.6.x kernels equally.
  17 ${HOSTCC} -imacros "${SYSROOT}/usr/include/linux/version.h" \
  18           -x c -o "${EXEC}" - <<_EOF_
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21
  22 int main(int argc __attribute__((unused)),
  23          char** argv __attribute__((unused)))
  24 {
  25     if((LINUX_VERSION_CODE & ~0xFF)
  26         != KERNEL_VERSION(${HDR_M},${HDR_m},0))
  27     {
  28         printf("Incorrect selection of kernel headers: ");
  29         printf("expected %d.%d.x, got %d.%d.x\n", ${HDR_M}, ${HDR_m},
  30                ((LINUX_VERSION_CODE>>16) & 0xFF),
  31                ((LINUX_VERSION_CODE>>8) & 0xFF));
  32         return 1;
  33     }
  34     return 0;
  35 }
  36 _EOF_
  37
  38 "${EXEC}"
  39 ret=${?}
  40 rm -f "${EXEC}"
  41 exit ${ret}