[Buildroot] [PATCH] toolchain/toolchain-external: warn for untested GCC/kernel version

Arnout Vandecappelle (Essensium/Mind) arnout at mind.be
Mon Jan 13 22:59:32 UTC 2020


The oldest toolchain we test in the autobuilders is the Sourcery ARM
toolchain which is GCC 4.8 and kernel headers 3.13. Therefore, it is
likely that we're missing the required _AT_LEAST dependencies to exclude
packages that don't build with older GCC/headers.

Add a comment to the custom external toolchain that warns when an
untested GCC or kernel headers version is selected.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
---
This patch was triggered by [1], where I observed that zxing-cpp is
probably missing a GCC_AT_LEAST_4_8 dependency, but we don't detect this
in the autobuilders for lack of an older toolchain.

Note that this also means we should probably remove all older
GCC_AT_LEAST options from packages.

Alternatively, we could in the custom external toolchain remove all the
old options (and also remove them from packages), and replace it with
e.g. "4.8 or earlier".

But for the time being, this patch is simpler :-)

[1] http://lists.busybox.net/pipermail/buildroot/2020-January/271558.html
---
 .../toolchain-external-custom/Config.in.options             | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
index 665765a104..9680509a13 100644
--- a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
+++ b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options
@@ -92,6 +92,9 @@ config BR2_TOOLCHAIN_EXTERNAL_GCC_OLD
 
 endchoice
 
+comment "GCC older than 4.8 is not tested by Buildroot. Use at your own risk."
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
+
 choice
 	bool "External toolchain kernel headers series"
 	default BR2_TOOLCHAIN_EXTERNAL_HEADERS_REALLY_OLD
@@ -298,6 +301,9 @@ config BR2_TOOLCHAIN_EXTERNAL_HEADERS_REALLY_OLD
 
 endchoice
 
+comment "Kernel headers older than 3.13 is not tested by Buildroot. Use at your own risk."
+	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
+
 choice
 	prompt "External toolchain C library"
 	default BR2_TOOLCHAIN_EXTERNAL_CUSTOM_UCLIBC
-- 
2.21.1



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