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#!/bin/sh
SYSROOT="${1}"
# Make sure we have enough version components
HDR_VER="${2}.0.0"
HDR_M="${HDR_VER%%.*}"
HDR_V="${HDR_VER#*.}"
HDR_m="${HDR_V%%.*}"
EXEC="$(mktemp -t check-headers.XXXXXX)"
# We do not want to account for the patch-level, since headers are
# not supposed to change for different patchlevels, so we mask it out.
# This only applies to kernels >= 3.0, but those are the only one
# we actually care about; we treat all 2.6.x kernels equally.
${HOSTCC} -imacros "${SYSROOT}/usr/include/linux/version.h" \
-x c -o "${EXEC}" - <<_EOF_
#include <stdio.h>
#include <stdlib.h>
int main(int argc __attribute__((unused)),
char** argv __attribute__((unused)))
{
if((LINUX_VERSION_CODE & ~0xFF)
!= KERNEL_VERSION(${HDR_M},${HDR_m},0))
{
printf("Incorrect selection of kernel headers: ");
printf("expected %d.%d.x, got %d.%d.x\n", ${HDR_M}, ${HDR_m},
((LINUX_VERSION_CODE>>16) & 0xFF),
((LINUX_VERSION_CODE>>8) & 0xFF));
return 1;
}
return 0;
}
_EOF_
"${EXEC}"
ret=${?}
rm -f "${EXEC}"
exit ${ret}
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