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-rwxr-xr-xsupport/scripts/check-kernel-headers.sh21
1 files changed, 21 insertions, 0 deletions
diff --git a/support/scripts/check-kernel-headers.sh b/support/scripts/check-kernel-headers.sh
new file mode 100755
index 0000000000..d7fe7d4bc2
--- /dev/null
+++ b/support/scripts/check-kernel-headers.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+CC="${1}"
+# Make sure we have enough version components
+HDR_VER="${2}.0.0"
+
+HDR_M="${HDR_VER%%.*}"
+HDR_V="${HDR_VER#*.}"
+HDR_m="${HDR_V%%.*}"
+
+# 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.
+
+exec ${CC} -E -x c -o - - >/dev/null 2>&1 <<_EOF_
+#include <linux/version.h>
+#if (LINUX_VERSION_CODE & ~0xFF) != KERNEL_VERSION(${HDR_M},${HDR_m},0)
+#error Incorrect kernel header version.
+#endif
+_EOF_
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