c3c4b3dfa8
The C program inside check-kernel-headers.sh has two checking mode: a strict and a loose one. In strict mode, we want the kernel headers version declared by the user to match exactly the one of the toolchain. In loose mode, we want the kernel headers version of the toolchain to be greater than or equal to the one declared by the user: this is used when we have a toolchain that has newer headers than the latest version known by Buildroot. However, in loose mode, we continue to show the "Incorrect kernel headers version" message, even though we then return a zero error code. This is very confusing: you see an error displayed on the terminal, but the build goes on. We fix that by first doing the loose check first, and returning 0 if it succeeds. And then we move on with the strict check where we want the version to be identical. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
70 lines
2.1 KiB
Bash
Executable file
70 lines
2.1 KiB
Bash
Executable file
#!/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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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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HDR_m="${HDR_V%%.*}"
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# Exit on any error, so we don't try to run an unexisting program if the
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# compilation fails.
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set -e
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# Set the clean-up trap in advance to prevent a race condition in which we
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# create the file but get a SIGTERM before setting it. Notice that we don't
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# need to care about EXEC being empty, since 'rm -f ""' does nothing.
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trap 'rm -f "${EXEC}"' EXIT
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EXEC="$(mktemp -p "${BUILDDIR}" -t .check-headers.XXXXXX)"
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# We do not want to account for the patch-level, since headers are
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# not supposed to change for different patchlevels, so we mask it out.
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# This only applies to kernels >= 3.0, but those are the only one
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# we actually care about; we treat all 2.6.x kernels equally.
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${HOSTCC} -imacros "${SYSROOT}/usr/include/linux/version.h" \
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-x c -o "${EXEC}" - <<_EOF_
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int main(int argc __attribute__((unused)),
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char** argv __attribute__((unused)))
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{
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int l = LINUX_VERSION_CODE & ~0xFF;
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int h = KERNEL_VERSION(${HDR_M},${HDR_m},0);
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if ((l >= h) && !strcmp("${CHECK}", "loose"))
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return 0;
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if (l != h) {
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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}, ${HDR_m},
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((LINUX_VERSION_CODE>>16) & 0xFF),
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((LINUX_VERSION_CODE>>8) & 0xFF));
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return 1;
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}
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return 0;
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}
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_EOF_
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"${EXEC}"
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