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authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2014-04-07 20:19:12 +0200
committerGravatar Peter Korsgaard <peter@korsgaard.com>2014-04-09 01:38:10 +0200
commit2a82bb8a9049afefeff751c73d2cad92bb0c8b53 (patch)
treee1057003354f106c6cb62d6f78773f046278ec0e /toolchain/helpers.mk
parent7fda943b435d0ad64125d004aae82c6ee4d821da (diff)
downloadbuildroot-2a82bb8a9049afefeff751c73d2cad92bb0c8b53.tar.gz
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support/check-kernel-headers: fix old custom toolchains without -print-sysroot
Old toolchains, with old gcc that do not support -print-sysroot, break the kernel-headers version check script: it fails to find the sysroot of the toolchain, and thus ends up including the host's linux/version.h. Most of the time, this will break early, since the host's kernel headers will not match the toolchain settings. But it can happen that the check is succesful, although the configuration of the toolchain is wrong: - the custom toolchain has kernel headers vX.Y - the user selected vX.Z (Z!=Y) - the host has headers vX.Y In this case, the check passes OK, but the build of some packages later on will break (which is exactly what those _AT_LEAST_XXX options were added to avoid). Fix that by passing the sysroot to the check script, instead of the cross compiler. We get the sysroot as thus: - for custom toolchains, we use the macro toolchain_find_sysroot. We can do that, because we already have a complete sysroot with libc.a at that time. - for internal toolchain using a custom kernel headers version, we just use $(STAGING_DIR). We can't use the macro as for custom toolchains above, because at the time we install the kernel headers, we do not yet have a complete sysroot with a libc.a. But we can just use $(STAGING_DIR), since we're only interested in the kernel headers. For all other types of toolchains, we already have the _AT_LEAST_XXX options properly set, so we need not add a check in this case. Fixes: http://autobuild.buildroot.net/results/f33/f331a6eff0b0b93c73af52db3a6b43e4e598577e/ http://autobuild.buildroot.net/results/a57/a5797c025bec50c10efdcff74945aab4021d05e4/ [...] [Thanks to Thomas for pointing out the toolchain_find_sysroot macro!] Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'toolchain/helpers.mk')
-rw-r--r--toolchain/helpers.mk2
1 files changed, 1 insertions, 1 deletions
diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
index 68759163e6..9595196e9b 100644
--- a/toolchain/helpers.mk
+++ b/toolchain/helpers.mk
@@ -166,7 +166,7 @@ copy_toolchain_sysroot = \
# Check the specified kernel headers version actually matches the
# version in the toolchain.
#
-# $1: cross-gcc path
+# $1: sysroot directory
# $2: kernel version string, in the form: X.Y
#
check_kernel_headers_version = \