* [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench
@ 2021-08-14 21:52 Giulio Benetti
2021-08-14 21:52 ` [Buildroot] [PATCH 1/2] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101915 Giulio Benetti
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Giulio Benetti @ 2021-08-14 21:52 UTC (permalink / raw)
To: buildroot
Cc: Giulio Benetti, Romain Naour, Thomas De Schampheleire, Thomas Petazzoni
This patchset introduce gcc bug 101915 and reference to it in lmbench to work
it around by disabling optimization(-O0).
Giulio Benetti (2):
toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101915
package/lmbench: fix build failure due to gcc bug 101915
package/lmbench/lmbench.mk | 4 ++++
toolchain/Config.in | 7 +++++++
2 files changed, 11 insertions(+)
--
2.25.1
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^ permalink raw reply [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH 1/2] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101915
2021-08-14 21:52 [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench Giulio Benetti
@ 2021-08-14 21:52 ` Giulio Benetti
2021-08-14 21:52 ` [Buildroot] [PATCH 2/2] package/lmbench: fix build failure due to gcc bug 101915 Giulio Benetti
2021-08-19 20:59 ` [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench Thomas Petazzoni
2 siblings, 0 replies; 4+ messages in thread
From: Giulio Benetti @ 2021-08-14 21:52 UTC (permalink / raw)
To: buildroot
Cc: Giulio Benetti, Romain Naour, Thomas De Schampheleire, Thomas Petazzoni
lmbench package fails to build for the Microblaze architecture with
optimization enabled with gcc = 11.1.0:
http://autobuild.buildroot.net/results/ae1/ae1e4d61ed367c6cb64442c60d98882cc7985346/
It's been reported upstream:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101915
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
---
toolchain/Config.in | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/toolchain/Config.in b/toolchain/Config.in
index 3888eeafe2..07320fdef9 100644
--- a/toolchain/Config.in
+++ b/toolchain/Config.in
@@ -177,6 +177,13 @@ config BR2_TOOLCHAIN_HAS_GCC_BUG_101737
bool
default y if BR2_sh4
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101915
+# ICE: in extract_insn, at recog.c:2294 on microblaze.
+# This bug still exists in gcc = 11.1.0
+config BR2_TOOLCHAIN_HAS_GCC_BUG_101915
+ bool
+ default y if BR2_microblaze
+
config BR2_TOOLCHAIN_HAS_NATIVE_RPC
bool
--
2.25.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH 2/2] package/lmbench: fix build failure due to gcc bug 101915
2021-08-14 21:52 [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench Giulio Benetti
2021-08-14 21:52 ` [Buildroot] [PATCH 1/2] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101915 Giulio Benetti
@ 2021-08-14 21:52 ` Giulio Benetti
2021-08-19 20:59 ` [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench Thomas Petazzoni
2 siblings, 0 replies; 4+ messages in thread
From: Giulio Benetti @ 2021-08-14 21:52 UTC (permalink / raw)
To: buildroot
Cc: Giulio Benetti, Romain Naour, Thomas De Schampheleire, Thomas Petazzoni
The lmbench package exhibits gcc bug 101915 when built for the
Microblaze architecture with optimization enabled, which causes a build
failure.
As done for other packages in Buildroot work around this gcc bug by
setting optimization to -O0 if BR2_TOOLCHAIN_HAS_GCC_BUG_101915=y.
Fixes:
http://autobuild.buildroot.net/results/ae1/ae1e4d61ed367c6cb64442c60d98882cc7985346/
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
---
package/lmbench/lmbench.mk | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/package/lmbench/lmbench.mk b/package/lmbench/lmbench.mk
index 2f3b19b5f8..b0f99ff106 100644
--- a/package/lmbench/lmbench.mk
+++ b/package/lmbench/lmbench.mk
@@ -18,6 +18,10 @@ LMBENCH_CFLAGS += `$(PKG_CONFIG_HOST_BINARY) --cflags libtirpc`
LMBENCH_LDLIBS = `$(PKG_CONFIG_HOST_BINARY) --libs libtirpc`
endif
+ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_101915),y)
+LMBENCH_CFLAGS += -O0
+endif
+
LMBENCH_POST_PATCH_HOOKS += UPDATE_CONFIG_HOOK
define LMBENCH_CONFIGURE_CMDS
--
2.25.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench
2021-08-14 21:52 [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench Giulio Benetti
2021-08-14 21:52 ` [Buildroot] [PATCH 1/2] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101915 Giulio Benetti
2021-08-14 21:52 ` [Buildroot] [PATCH 2/2] package/lmbench: fix build failure due to gcc bug 101915 Giulio Benetti
@ 2021-08-19 20:59 ` Thomas Petazzoni
2 siblings, 0 replies; 4+ messages in thread
From: Thomas Petazzoni @ 2021-08-19 20:59 UTC (permalink / raw)
To: Giulio Benetti; +Cc: Romain Naour, Thomas De Schampheleire, buildroot
On Sat, 14 Aug 2021 23:52:05 +0200
Giulio Benetti <giulio.benetti@benettiengineering.com> wrote:
> This patchset introduce gcc bug 101915 and reference to it in lmbench to work
> it around by disabling optimization(-O0).
>
> Giulio Benetti (2):
> toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101915
> package/lmbench: fix build failure due to gcc bug 101915
Applied to master, thanks.
--
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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2021-08-14 21:52 [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench Giulio Benetti
2021-08-14 21:52 ` [Buildroot] [PATCH 1/2] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101915 Giulio Benetti
2021-08-14 21:52 ` [Buildroot] [PATCH 2/2] package/lmbench: fix build failure due to gcc bug 101915 Giulio Benetti
2021-08-19 20:59 ` [Buildroot] [PATCH 0/2] Introduce and work-around bug 101915 on lmbench Thomas Petazzoni
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