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@@ -1,9 +1,25 @@
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#!/bin/sh
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+# This script (and the embedded C code) will check that the actual
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+# headers version match the user told us they were:
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+#
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+# - if both versions are the same, all is well.
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+#
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+# - if the actual headers are older than the user told us, this is
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+# an error.
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+#
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+# - if the actual headers are more recent than the user told us, and
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+# we are doing a strict check, then this is an error.
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+#
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+# - if the actual headers are more recent than the user told us, and
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+# we are doing a loose check, then a warning is printed, but this is
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+# not an error.
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+
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BUILDDIR="${1}"
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SYSROOT="${2}"
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# Make sure we have enough version components
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HDR_VER="${3}.0.0"
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+CHECK="${4}" # 'strict' or 'loose'
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HDR_M="${HDR_VER%%.*}"
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HDR_V="${HDR_VER#*.}"
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@@ -28,20 +44,24 @@ ${HOSTCC} -imacros "${SYSROOT}/usr/include/linux/version.h" \
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-x c -o "${EXEC}" - <<_EOF_
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#include <stdio.h>
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#include <stdlib.h>
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+#include <string.h>
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int main(int argc __attribute__((unused)),
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char** argv __attribute__((unused)))
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{
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- if((LINUX_VERSION_CODE & ~0xFF)
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- != KERNEL_VERSION(${HDR_M},${HDR_m},0))
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+ int ret = 0;
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+ int l = LINUX_VERSION_CODE & ~0xFF;
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+ int h = KERNEL_VERSION(${HDR_M},${HDR_m},0);
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+
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+ if(l != h)
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{
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printf("Incorrect selection of kernel headers: ");
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printf("expected %d.%d.x, got %d.%d.x\n", ${HDR_M}, ${HDR_m},
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((LINUX_VERSION_CODE>>16) & 0xFF),
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((LINUX_VERSION_CODE>>8) & 0xFF));
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- return 1;
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+ ret = ((l >= h) && !strcmp("${CHECK}", "loose")) ? 0 : 1;
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}
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- return 0;
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+ return ret;
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}
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_EOF_
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